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Last Post 03 Aug 2016 07:40 PM by  Fair
Vorshlag E46 Alpha - BMW 330Ci LSx Build Thread
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19 Apr 2012 05:39 PM

    Introduction (May 2011): Many of you know of Vorshlag from our earliest Vorshlag branded project car, the E36 LS1 swap, aka: "The Alpha car". I purchased this 1993 BMW 318is chassis back in 2002 and it was developed into the first LS1 powered E36 on the planet. This project spawned a "kit" of parts that we started selling in 2007, and we've been developing, improving, and selling parts for this popular V8 swap ever since. There have been several other companies that took this idea and tried to market a kit, but most of those have since come and gone. We're still here, still selling our Vorshlag E36 LS1 swap components. Since 2002 we've become the premiere spherical top mount/camber plate supplier to many models/markets, one of the biggest AST shock dealers, and more. :) The "LS1 swap kit" part of Vorshlag is actually pretty small, but its something we're known for, we're passionate about, and its something I want to expand to other BMW models. Since almost all BMW motors are pretty limited with respect to ultimate power, affordable upgrades, supported EFI tuning software, and even engine reliability, the LS1 family of engines is a huge improvement to these otherwise capable chassis. Anyone that's ridden in or driven an LSx powered BMW will attest to this.

    364133775_fC6JV-S.jpg 1208168974_fqnaZ-S.jpgExisting Vorshlag creations: BMW E36 LS1 and BMW E30 LS1

    As most of you know we tackled the E30 LSx swap last year (but decided not to make this into a kit) with our $2010 GRM Challenge E30. We've ran into several limitations with that chassis (brakes, rear suspension design, front strut tower placement, overall chassis rigidity, etc), most of which we're dealt with but are not easy to overcome. Since we have no desire to make an LS1 kit for this chassis, after the upcoming $2011 Challenge in October that car will likely have run its course here at Vorshlag and be sold. Sad, but true. So we need another BMW chassis to tackle with an LS1 swap...

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    Enter the BMW E46. This chassis is aging gracefully and used car prices are dropping to affordable levels for running & driving 323/325/328/330 E46 coupes and sedans, plus there are E46 cars are out there with blown head gaskets or other ailments that make them VERY affordable. This chassis is more similar to the E36 chassis (which the world fell in love with) than the E30 was. The E46 is an evolutionary design from the E36, instead of the revolution that the E36 was over the E30. The E46 is slightly larger and heavier than the E36, but the looks/curves/interior is still very pleasing to the eye, and to some (me included) its the best looking 3 series ever. Some of this added room shows up under the hood (where the E30 severely lacked space), mostly in added width but also in fore-aft room, plus the fenders are roomier for larger wheel/tire room and the 330 has much larger OEM brakes (which require 17" wheels to clear).

    The larger size of the E46 should make the LSx swap even easier than the E36, and possibly even some of the same E36 LS1 swap parts would work in this newer chassis. Well, that was the hope...

    DSC1140-S.jpg DSC1144-S.jpg

    The reality is the E46 engine bay is pretty different in general layout and shape from the E36. As you can see above we've already started test fitting LSx motors with T56 transmissions into the E46 chassis, and from this initial testing we've learned a lot. Namely: nothing we currently make for the E36 LS1 fits this chassis. Although some of the same challenges are there for packaging the V8 and full length headers, new ones have arisen. So an entirely new set of motor mounts, trans crossmember, driveshaft, steering shaft and even a new oil pan will be needed to fit the LSx V8 underhood an E46 (aka: "Stage 0 kit"). Not to worry - we are already tackling this, and have a rigid timeline for offering the "Stage 0" parts needed to mount the LSx motor and T56 drivetrain into the E46.

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    As you can see here, we have located a willing E46 donor chassis for this V8 swap in-house development work. This car was pretty much a classic example of a "basket case", but it will still suit our needs. It was already partially disassembled, had no OEM motor or transmission, but much of the rest of the car is intact. This is a white 2001 BMW 330Ci coupe, 5-spd, hardtop car - as in: no sunroof! I didn't even think these 330 cars existed without a sunroof, as I had never seen one (and I've looked for some time). The only other E46 cars I've found in the USA without the factory sunroof were lower-end 325/323 cars or the later ZHP 330s (2003-2005). So finding this car was like uncovering a unicorn, but a damaged unicorn. We spent considerable time, money and effort converting my blue 2001 330Ci into a no-sunroof coupe, following SCCA's rigid guidelines for DSP class. $1500 in imported BMW roof/roof bow/headliner and 2 weeks of work later we had a no-sunroof '01 330 Coupe. So this white car, even with all of its flaws, was a unique find.

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    And flaws it has aplenty. The rear subframe has ripped itself out of the trunk floor at one of the 4 attachment points, then was driven this way for a good long time, so it needs substantial rear trunk/chassis repair. BMW stopped covering these issues under warranty years ago, but they do sell a repair kit - which is basically a new trunk floor panel and some other bits that tend to fail. To most folks this would mean $3500+ in shop repairs, most of that in labor (diff and subframe comes out, trunk floor comes out, new panel welded in, other updates are made), but we're industrious and can tackle it! :D ("ignorance is bliss"?) The car has also been robbed of much of the engine harness/DME wiring, all of the sub-computers, HVAC components, front seats, radio/amp, OEM fuel tank, stock wheels and a little more. But a lot of the interior and wiring is intact, and after a couple weekend days of cleaning/clay barring the exterior, pressure washing the filthy engine bay, and removing/cleaning/re-assembling the interior, it is looking more like a real car again. The exterior is straight and doesn't need paint or body repair (other than some light PDR), which is a huge plus. I located the previous owner and we're seeing about buying the fuel tank back as well as a few other missing items that would save us some work hunting down replacements.

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    So with the rear trunk floor repaired, and a little more work beyond our Stage 0 parts development, this chassis could be made into a running, driving car again - after we've optimized the driveline installation parts. That is really our number one goal: making the "Stage 0" parts to get the motor + trans located into this chassis, and building production full length headers. You can get a stand-alone LSx engine harness into a car in a weekend, that part is easy. Its making all of the factory gauges, a/c, warning lights and OBDII systems work that is a nightmare. Wiring the LSx engine computer perfectly into a BMW sub-systems isn't our specialty, and never has been. Its tedious, time consuming work that is best handled on a car by car basis, due to the many changes to a given chassis throughout a build generation. I've done it a few times and a one-size-fits-all, 100% plug-n-play wiring solution is neither possible or "kitable" for the E36, and the E46 is so much more challenging with all of the integration of subsystems into the DME that BMW incorporated. Some people/shops thrive on this type of work, and more power to them.

    But for a "mostly-streetable" car, or a track-only car, or even a partial street/track car, the wiring work needed to make the engine run is fairly simple, and only a small number of wires are needed to tie into the chassis itself. In most BMWs (E30, E36) there are separate computers for ABS and HVAC and other "body" systems, but these later CANBUS cars like the E46, more of that sub-system work is handled by the main BMW DME computer. So the E46 is a new challenge, but we have some solutions in store for the most critical functionality. We need to have a driving test mule to verify the viability of the E46 330 rear halfshafts, stock brakes and other OEM bits with the LS1 drivetrain installed. We'd hardly expect anyone to buy our Stage 0 kit if there were still so many other OEM driveline parts being used that were untested. So this car can and will run, but as what?

    One other thing to note: our 2001 Mustang GT 5.0 6-spd test mule that we've been using to develop suspension parts for the S197, by tracking it in NASA TTB class and autocrossing in SCCA STX class, has had a recent change of purpose: This car will no longer be tracked. You can read about that in the latest post in that car's build thread (on Vorshlag, Corner-Carvers, SCCA Forums, or roadraceautox.com).

    So I am, as of this week, currently in need of another track car - which this white 330 LSx could fill. Yes, we have the LSx E30 that can technically be run in NASA TTU (although not competitively without some additional $ invested), but its eating T5 transmission at an alarming rate, so we're saving it for UTCC in July and GRM Challenge autocross/drag race event in October. The proper fix for that issue is a T56 or some other beefier transmission, which the GRM budget doesn't allow for. Also, my blue 2001 330 Ci we have (formerly used in DSP class) is not being sold, but being converted back into a dedicated NASA TT car. It happens to be base classed very well in NASA TTE, and our build up for TTD class looks pretty unstoppable (sets track records in TTD at will). But this blue car is really my wife's main TT car. She's a competitive racer herself, and "sharing" a single car for Time Trial use at a NASA weekend is less than ideal for either of us or the car in question.

    So this white 330 with an LS1 installed could become my personal NASA TT/track car. NASA Time Trial use is great for chassis/drivetrain testing, as the competition element there would push us to develop the car into a more capable track vehicle. But what class do we build it for? As with any engine swapped chassis, it would need a "new base classing" from the NASA TT director if we hoped to enter it in the normal TTA-TTF classes. But for an LS1 swap, those re-classings tend to be pretty painful, and then we're back to playing my least favorite "pay with points" mod game. So we need to look at TTS, TTU and TTR. Otherwise this could just become a "fun street car" type of build, which could be run at HPDE events. These "class-less" HPDE cars tend to bore me fairly soon, though, just as running around in HPDEs without any rhyme or reason tends to bore me. The competition element in NASA TT is what brought me back to doing track events, so TT is where it needs to be run, for track use.


    That's right, we want you to weigh in with your choice. Please look at the three possible paths for this car below and let us know which you would chose - or lay out another option, if you feel we have missed something.

    Three Test Car Options

    1. Option one is an all-out NASA TTU race car. Build the car to the limit of the TTU class. Power to weight ratio of 5.5 lbs per hp, which means we'd shoot for a race weight with cage + driver of 2800 lbs (gutted interior, composite panels, lexan, etc), so we'd need to make a motor with 509 whp to max out the power-to-weight. That means we'd need to build a fairly stout ~7.0L LSx motor (again), a TR-6060 trans (The E36 Alpha's 500 whp 7 liter eventually broke the bone stock T56), Accusump/oiling improvements, and flare the body for wide Hoosier race rubber (315mm out back, minimum). This build would match more of the "final" installment of our E36 Alpha car, shown below. The budget would quickly creep past $30K or more, and consumables would be pricey (big Hoosiers, expensive motor, etc). Already owning 5 race cars already, this would be a bit of a stretch for me, but it would be pretty damn fun.

    429701314_P6Y67-S.jpg 686301616_SEn6q-S.jpg

    2. Option 2 is a no compromise "Super street car". Big LS1 motor, working A/C and ABS, all of the OEM gauges, all of the creature comforts. The automatic climate control and factory ABS would be extremely difficult to integrate (I will explain more in another post), as these systems all tie into the main BMW DME computer. Another hurdle is the CAN-BUS wiring, so an outside CAN-BUS wiring guru would be needed to have the LS1's computer talk to the BMW DME, to allow these systems to function. Probably a black box in between to interpret and wash the signals from the LS1 computer to the BMW computer and back, eating thousands of dollars in tuning and software work. The car would weigh in the 3200-3300 pounds range with driver, have a nice stereo, 4 seats, but be of little use on a road course. I'm not too thrilled with option 2, but this is what a lot of potential customers think they want when they are looking at our LS1 kits (but very few of them ever actually make this mythical "super street car").

    3. Build a dual purpose street/track car for NASA TTS. Make it have most of the dash, working windows, wipers, lights, signals, horn, a very basic heater, and license and inspect the finished car for some street fun. In the end its really built for the track around something like the NASA TTS class rules and limits, but it can also be used (and tested) under real world street use. No flares (saves mucho time/effort/money), no huge/crazy tires/mods, just basic AST coilover shocks, reasonably sized R comp tires on decent wheels, all the factory steel and glass, OEM based brakes (E46 330 has 13" front rotors already), etc.

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    The E46 non-M can fit 18x10s with 265mm rubber under just rolled fenders, like the car above had before we flared the fenders to clear 1" wider 285s. This dual-purpose street/track build was what the E36 Alpha car was originally (for the first 2 years) with a used 2002 Camaro 5.7 LS1, and it worked great in this role (see below) logging both street and autocross miles.

    DSC2946-S.jpg 155045897_ktdAB-S.jpg

    This third option is more appealing to me, as it revolves around much more achievable TTS class limits, which has a higher minimum weight for the power we'd shoot for. This means we could leave the interior installed, and add something like a 4-point roll bar/harnesses/2 race seats for safety. Otherwise we'd leave it with carpet, door panels, and maybe even a radio. With some interior left in, and an inspection sticker and tags, we could drive it to In-n-Out Burger on nice nights, or to Cars and Coffee car shows here in town, as well as take it to the track if we wanted to avoid towing our enclosed rig to an event.

    For NASA, TTS is like TTU and TTR - these top 3 Time Trial classes do away with the (often times painful) "base classing" of your car and the tedious "points" system, where you use available points to "buy" mods for your build, yet still have to live within a set power-to-weight ratio, limits for tires, a base weight assigned to your car, etc. TTS/U/R are all power-to-weight based, with some modifiers for big things like tire width, compounds (slicks vs DOT Rs), and number of doors - more "high level" performance impacts, rather than counting every point for every bolt-on you want to do. So the rules are easier to live with.

    Today we weighed my blue 2001 BMW 330 coupe at 3167 lbs. This with the stock seats back in, stock battery, back in, fully functional HVAC, the HK radio + amps, a 62 lb roll bar, all 6 of the OEM airbags, 18x10s and 265 Yokohamas. The race seats lop 100 lbs off of that, and the A/C and airbags drop even more (we had it down under 3000 lbs at one point, with the a/c still installed). The white 330 weighed in at 2090 lbs yesterday, missing the drivetrain and front seats. This means I suspect we could get an "option 3" track/street LS1 E46 into the 2950/3000 lbs range, sans driver. The power-to-weight ratio for TTS is 8.7 lbs/hp (without modifiers), so with race weight with driver of 3150 lbs that gives us a max power number of 362 whp. That power level is very easily achieved with a very mild 5.7L LSx build, which we can whip up pretty quickly. That also means: reliable and affordable (both popular attributes!)

    This street/track TTS option and that power/weight goal would allow us to keep much of the interior, the power windows, all of the OEM lights, and the other basics needed for "street legality", while not saddling us with the pain and expense of integrating the automated climate control or ABS/ESC into the (non-existent) BMW DME. I have a good solution for the ABS, that I derived from working on McCall's Z3 this past weekend, but I'll cover that in another post. This type of semi-street/dedicated track car is what most of our E36 LS1 kit customers actually end up building. Some compromises in creature comforts, but a terror on track and still streetable enough to drive to/from track events and even around town for extra fun. We have solutions to the OBD-II inspection issues, that are actually quite easy (forces the inspectors to do a regular "sniffer" emissions test on the car, which it can pass easily with good catalysts).

    So, let us know what you think of the E46 LS1 kit, and which way we should go for the running/driving test mule. Stay tuned (see: thread tools/subscribe to thread) for more updates in the coming months. Also, I'm still looking for a signature ‘look’ for the various Vorshlag race cars (that incorporates the updated VOMO logo) and need a graphic designer. If that's something you're good at, please contact me.


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    19 Apr 2012 05:40 PM

    Project Update for July 25, 2011: Wow, its been two months since my last update? Dang, sorry guys. Well, we have been severely swamped since then, and are right in the middle of moving to a much larger shop, but we actually did some work on this car in June. Let's see...

    Let me start off by saying I'm not a fan of replacing the stock K-member for an engine swap unless absolutely necessary, and neither are the rules makers for many racing sanctioning bodies, so we are going to make the LS1+T56 drivetrain fit the car with the OEM crossmember intact. Sure, somebody will pipe up and say they can make a crossmember that's affordable, rigid, fits better, holds the engine better, has more clearance with this or that, saves 15 pounds, and makes your butt look smaller - but there are ALWAYS compromises when you use a non-stock crossmember, not just for racing class rules. Some of the kits I've seen had big compromises with respect to tubular crossmembers, with sketchy under-engineering or the other way - "steel-itis" (where they just throw a bunch of steel at it). Sometimes its a beautifully fabbed crossmember that costs $1500, so it costs you. And you have to remember that the pick-up points for the front suspension tie into this, as does the steering rack. So not only is the crossmember securing the drivetrain, its taking all of the suspension and braking loads, too. Its pretty important piece of engineering, and the stock front crossmembers (at least) on an E46 BMW aren't at all bad.

    This means we are going to keep an eye on the OEM front crossmember for clearance to the oil pan and headers, which is nothing new to us. The initial mock-ups we did in May were using a complete/dressed 5.7L Camaro LS1 and T56 trans, with the '98-02 Camaro oil pan and front accessory drives. We figured out pretty quickly that this relatively long "rear sump" oil pan wasn't going to work in the E46 chassis with this V8 motor, as the engine bay layout is enough different on the E46 vs the E36 to make the barely-E36-swap-friendly Camaro LS1 pan not fit. We had the crossmember dropped down a few inches in those early mock-up pics, but I had some ideas in mind. Since then we did some looking, took a gamble, ordered an oil pan that just came to the market, and found a solution that fits beautifully for this swap - that's both affordable and very well built.

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    This LS-fit oil pan has the same capacity but has a shorter length rear sump section, that with this drivetrain clears the crossmember by several inches (unlike the various LS1, LS2 and truck LSx pans we tested with; it even fits better than the Camaro pan in the E36). Its the only one we have found that has the right dimensions fore-aft for the oil pan sump and its still pretty short and flat at the front of the oil pan. So we've got this pan on our mock-up motor and put the drivetrain in the engine bay where it optimizes placement to clear the oil pan sump at the back, is level with the crossmember underneath as well, has good firewall clearance (but still big rearward engine set-back), and also clears the stock steering shaft and has the best fit for exhaust headers. Hours of measuring, mocking, angling, tilting, and testing to finally get the drivetrain where I was happy.

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    A few more hours and the crossmember was built in the car, with a measured "spacer block" under the oilpan. This sets the drivetrain angles and fire-aft plus lateral locations, and most important - it got the mock-up drivetrain off the floor and in the ca,r so we can move the Alpha car to the new shop easier. As you can see we have the prototype trans crossmember built and bolted in, as well as most of the motor mount components in place - another 3-4 hours and those will be complete. Primary bends, merge collectors, and exhaust port flanges are here and also awaiting some fabrication time (once we are moved into our new shop) to get the prototype headers built. Then we'll make a driveshaft and get a real engine in there (just a mock-up block/headers/trans in there right now).

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    Last month I also bought a rolled-over 2005 BMW 330Ci, which was chock full of good parts we needed. I got it primarily for the stock, low mileage drivetrain (to re-use the M54 in my blue '01 330 track car). As a bonus we also got many odds and ends that were not on this white '01 330 Alpha car when I bought it. The guys here at Vorshlag spent about 2 days and salvaged the entire wiring harness, fuel tank, HVAC system, dash, gauge cluster, rear subframe assembly brake-to-brake, and more, then I hauled the wrecked chassis off to the scrap yard. That score of spare E46 330 parts will help greatly in getting this white Alpha car, which is very parts deficient, back together and more complete. The '05 M54 is already in the blue 330, now awaiting a new prototype M54 balancer before it fires up. Win, win.

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    More soon,

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    19 Apr 2012 05:40 PM

    Project Update for Oct 25, 2011: It has been a busy month since we brought the white E46 Alpha car over to the new shop. We took the E30 V8 to Florida and won the $2011 GRM Challenge, which was pretty cool. Now that we are back, and after bringing 7 cars to the new shop and getting a lift installed, we are wrenching on two neglected E46s. First up was my blue 2001 E46 330Ci that we ran last year in NASA "TTD" class. It got a new 2005 M54 3.0L longblock, a brand new OEM balancer (long story!), and finally is driving around, logging some street miles before it goes back on track.

    DSC5740-S.jpg DSC5746-S.jpg

    The white 2001 BMW 330Ci "E46 Alpha" was also worked on last week, and I'll share that little step forward here. We had a customer asking us to make one of our Vorshlag, collapsible, racing U-joint steering shaft assemblies for the E46 chassis, to go with our existing E30, Z3 and E36 offerings. So we used the white 2001 as the guinea pig, since it needed one with the V8 for better header clearance. It took a few hours to make the first prototype and its on the car and working well.

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    Now that we've got a full time welder/fabricator that joined us a month ago, plus our other mechanic on staff, we're beginning to build turn-key LSx BMWs - two E36 builds are already underway. We will also continue development on the E46 Alpha car, and the prototype headers and motor mounts will be finished soon.

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    We've since added this Vorshlag E46 steering shaft as a new product on our website and have sold one to an E46 track user. No more sloppy rag joint in the steering shaft, its all good.

    Stay tuned to this thread for more updates as we attack the V8 swap development, run across other systems we can upgrade or make parts for, or otherwise do any significant wrenching on this V8 prototype.


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    19 Apr 2012 05:41 PM

    Project Update for Nov 4, 2011: We are one step closer to building the ultimate BMW E46 V8! Just a quick update, but it is an important milestone. In the week since my last update the guys in our shop have been working on the E46 Alpha car, between other projects. They have finished the motor mounts, with everything fully TIG welded by our fabricator Ryan, and the LS1/T56 drivetrain is securely in position.

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    The left picture above was pretty cool - we didn't stage that, I just looked up and noticed... "hmmm, that's 3 generations of BMWs with Vorshlag LS1 swaps lined up there". And in that same picture there's an E36 LS1 swap underway (black 1995 M3), and behind the Z3 is another E36 LS1 swap about to be kicked off (1992 325is). So we have... 5 LS1 swaps built or on-going in our shop at the moment. Kinda crazy.

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    Look how low that aluminum LS1 block sits in the chassis! And with 6 of the 8 cylinders located behind the front axle centerline, that's good for lower CG and better fore:aft weight balance than the long & tall straight BMW 6. That gave me an idea, and I took these pictures to show how different the LS1 motor length and installed location is compared to the stock M54 motor:

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    And fore:aft location of other Vorshlag V8 swaps, the E30 and E36/Z3 (can you see why I'm not a fan of E30 LS1 swaps?):

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    Its not easy to measure the Center of Gravity of a motor in a chassis, but in these two front shots you can see the outline of the heavy cast aluminum block/heads (ignoring the plastic intake manifolds and covers) of the LS1 and he M54 in the E46 chassis, and it gives you an idea of which drivetrain has the higher CG (M54):

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    Here are some close-ups of the motor mounts, which are easier to see with the heads off:

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    Once the prototype headers and driveshaft are finalized we will go back and make production fixtures for the finished motor mounts and trans crossmember, then we can start making those in production batches. The plan is to be at that point by December, unless the shop gets buried in customer fab/race prep/suspension work.

    We located another LS1 starter to use for mock-up yesterday, and Ryan will attack the header fabrication next. There is one piece of tack-welded sheet metal on the driver's side (that forms the base of a heat shield around the ABS module) that will have to be removed to clear the full length headers, but we will make a new heat shield to go back in its place. We are NOT removing or relocating the ABS or brake booster components. Most of the handful of completed E46 LS1 swaps I've seen do away with the ABS completely, which I feel is a huge mistake, and detracts from one of the best parts of the BMW E46.

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    The E46 LS1 prototype full-length header construction will be a huge amount of fabrication work, but it always is painful on that first set. This is where our economies of scale come in: Since we plan to make these headers and kits in quantities more than 1, the typical high cost for one-off custom headers and mounts won't hit our E46 LS1 swap kit customers in the wallet.

    We have all of the bends/collectors/flanges/supplies on-hand and I'll show an update as the prototype headers are coming together. Remember - we don't work on this car every day, but I am scheduling more fab time on it as we get freed up from other customer jobs. Once we have one set of headers built, they will be sent off to our header manufacturer for volume production.

    More soon!

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    19 Apr 2012 05:41 PM

    R33GTR;23339919 wrote:

    They aren't going to give this any priority until someone starts paying them.

    Nah, its not like that at all. :p

    Oiy, lemmie show you what we've done since the last update. I've been trying to make time to crop and edit these pics and do an update here for this car for the last 2-3 weeks.

    I will skip starting the 3 day holiday weekend and miss dinner with my wife tonight just to give you guys an update on the E46 LS1. Gosh! :D

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    There, is anyone appeased? :p

    We're actually further along than these pics show - these were snapped from 1-2 weeks ago. I need a full time "web update guy" to give me some back-up. We've been super busy, and I haven't had a lot of time to update all of our project threads. I've got 9 or 10 active project build threads going at once now and I'm juggling them on close to a dozen forums, and its all I can do to keep my other daily Vorshlag duties here up to date. I have one of my employees now tasked to try to take up the slack for my slow updates, so don't worry. As we continue to grow I will keep hiring more people to keep the "active on the internet" aspect of our business... active. :)

    So where were we - oh yea, the passenger LSx header prototype is done and fully TIG welded at each joint (looks better than the picture above, as it has that missing bend added). Driver's side header... (lemmie go back in the shop and peek)... OK, it looks like it is 3/4 complete, in steel. The plastic mock-up is done, and clearances checked. We ran out short of 1-3/4" mandrel bends for that header on Monday, but Matt ordered more. With the holiday shipping mess they were probably delayed getting here. Thought they'd be here today... oh wait... OK I just walked around the entire warehouse area and shop again and I think the box with those bends did get here today. The guys in the shop were too busy doing a motor swap today to attack the rest of the driver's header. We were hit with several E36 LS1 orders this week and just shipped out 3 kits today, including some internationally, after a big batch of E36 parts came in from powder coat. Its just nuts around here right now, sorry guys. Plus we've got a ton of racing going on, and suspension development, and shock and camber plate sales.

    Vorshlag is open all next week except Monday, and my super awesome fab guy Ryan that I hired back in October is working all week on the other header and then the collectors and other bits. There have been all sorts of things going back onto that E36 that were missing when we bought it, to try to make it a fully functional street car when its done. I've also picked up a good LS1 5.7L aluminum longblock block to have re/built up, and have a 6-spd for it, too.

    We're moving right along on the E46 Alpha, considering the volume of new projects, turn-key LS1 swaps, and customer fabrication work I've thrown at my technicians and fab guy at our new shop.

    Patience... :D

    Veteran Member

    Veteran Member

    19 Apr 2012 05:42 PM


    Thanks for sharing! Very good stuff there. That sounds a lot like how we're going so far, other than the oil pan we used.

    813909130_hpCLK-S.jpg 813508590_54mbK-S.jpg

    I'm still tempted to try the non-M E46 "medium case" 188mm diff housing, but making one of these into an LSD ($2500-ish with a good diff) will cost more than buying a used 210mm E46 M3 diff ($750 or so). Problem is the E46 M3 diff has a unique subframe halfshafts, and all of the rest. So we're back to buying a pull-out subframe assembly brake to brake ($1500-2000-ish).

    IRS88DIFF.jpg ford-irs-housing-S.jpg

    We'll do some looking and see if its worth doing this or... swapping in a Ford 8.8" aluminum IRS housing. That gives us a more affordable, stronger, lighter, differential housing with a near infinite number of gear ratios to choose from ($180/set for Ford Motorsport gear sets) and anything from stock clutch-type differentials to Wavetrac, Eaton, Torson, and more.

    IMG4273-S.jpg FordT-birdirsfactoryfive-S.jpg

    We'll so some looking for M3 assembly pullouts, run the numbers and see which option is the most affordable and has best gearing and differential options. The BMW tax is fairly brutal on some of these items, and in the end it might be better to make a new subframe to mount the 8.8" aluminum IRS center onto, with custom halfshafts to fit the E46.

    Thanks again for your input!

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    23 Aug 2012 12:17 PM

    Project Update for June 22, 2012: Two months without much progress on this car? Yea, its been busy here at Vorshlag working on all sorts of other in-house builds. Our $2011 GRM Challenge winning E30 V8 has been getting a lot of updates, as has our 2011 Mustang GT and our blue 2001 330Ci street/track car. We've got a ton of work completed on Matt's 1995 M3 LS1 and McCall's Z3M Roadster LS1 (both of those are almost completed). Now we can finally get crackin' on the white E46 330 LS1 Alpha car!

    DSC2431-S.jpg DSC2435-S.jpg
    Left: Matt's 1995 M3 LS1 is very close to completion. Lots of new Stage 1 parts developed! Right: Blue 330 "track car" is street legal again

    Remember how back in April I said we'd be making the E46 Alpha car into a pure track car, with zero street capabilities? Well... that's not what you guys asked for. So many people wanted us to go for a more street and track capable build that we have reconsidered and are going to go with the "Option 3" build: a car that is street capable yet still a very track worthy car.

    In the 4th and final installment of my event write-up for the Optima Faceoff at HOT ROD Power Tour autocross/track deal I mention this very E46 LSx build as the perfect opportunity to make a car that is ideal for these types of "unlimited street car" competition events. Optima Challenge, OLOA, TX2K, UTCC, and more. Could still be fun in NASA TT also. Taking our Mustang to the Optima event was fun, but that car is built around SCCA's ESP class rules - not even very far down that prep level yet - and is still mostly stock in many areas. This E46 could be a bit more extreme in its competition preparation level yet still have the basics of what many consider to be a true "street car": working lights/signals, windshield wipers, a heater, and even a few "optional" things like ABS brakes and power side windows. Now we won't be adding every factory feature back just yet, but enough to be street driven "on a nice day".

    We've got a pretty ambitious build plan mapped out but I'm going to hold back some details... in case things don't go according to plan. ;) I'd rather "under-promise and over-deliver" on the performance goals this time. As you can see in the picture above, that I took out in the shop today, the windshield is out. The stock unit was smashed so it had to go - with it out of the way making a roll cage will be easier. Wait, roll cage in a street car? Yes. And it will have carpet, a dash, door panels, head liner, and all of that. Even with all of that - the car will get much lighter.

    Stay tuned for more regular updates the rest of 2012.

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    23 Aug 2012 04:34 PM

    Project Update for August 23, 2012: This project has dragged on much longer than I like, but we have a new focus in the shop to complete this build and get the Stage 0 kit parts in production now. One major change that happened recently was we stopped doing routine "automotive repair work" and are now only doing the race fabrication, turn-key jobs, and racing related service work in our shop that makes sense. We were slowing down to do little $200 repair jobs and turning away big dollar turn-key LS1 installations, large race car fabrication jobs, and delaying long term prototype projects like this. Not any more. From now on, our fabricator and technician are unburdened with senseless wrenching and instead knocking out some development work on our new Miata LS1 Alpha, the Z3M LS1 turn-key (which is nearing completion), building three other turn key E36 LS1s, and attacking our E46 Alpha LS1 here.

    DSC4121-S.jpg DSC4133-S.jpg

    The Miata LS1 prototype kicked off last week and we needed the mock-up LS1/T56 drivetrain from the E46 Alpha, so the E46 got some much needed attention. You can see in the above right picture from earlier this week that the mock-up drivetrain is out.

    DSC4119-S.jpg DSC4118-S.jpg

    While it was in the air, the prototype headers were finally massaged for the last time, removed, and finish welded. These will be sent to our US supplier to have fixtures made for a batch production. The production units will be tainless steel, feature 1-3/4" primaries and a 3" merge collector.

    Prototype Vorshlag E46 LS1 swap headers are finally finished and ready for low-volume production in stainless steel

    The trunk floor damage is the worst I've ever seen on an E46 - this is what happens when you let the cracked floor pan go for a year. Or two. There will be substantial trunk floor replacement work going on here soon - we've re-mapped out how the roll cage structure will go, based on what we learned from fielding a car at the 2012 Pikes Peak event (and the many crashes there), and the trunk floor subframe mounts in this car will tie into the rear of the cage.

    DSC4129-S.jpg DSC4127-S.jpg

    After assessing the rear trunk floor damage, the 188mm ring gear "medium case" E46 differential carrier was removed. This was so we could mock-up the 8.8" ring gear aluminum 31-spline 2003-04 Cobra IRS carrier in its place. The front mounting flanges won't clear the rear subframe opening so there's not much to show. We do have two E46 subframes on hand and one will be modified to fit this front mounting style and then fabrication will be done to fashion proper mounts for the big Ford differential.

    DSC4122-S.jpg DSC4125-S.jpg

    We will show more in the next installment... but we will no longer ignore this car.

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    Veteran Member

    01 Nov 2012 05:53 PM


    Any progress or status of the headers? Found a buyer for my e36 and hoping to start a new project soon?

    We have been hacking away at the E46 Alpha car behind the scenes for the past couple of months. The latest progress to report is the pre-production header set was built and tested...

    We sent our prototype set to the header manufacturer, they made fixtures from the prototypes, and then made a single pre-production set from the new fixture. They sent the pre-production set back to us (shown above) and we test fit them in our E46 330Ci chassis. Well... we found a few things to tweak, which is normal, so we marked them up and sent them back for tweaks to the fixture. This is an iterative procedure that always takes more time than you want.

    jpg_MG_5262%20copy-S.jpg _DSC3727-S.jpg

    And now Hurricane Sandy has flooded their shop and almost all of their crew is at SEMA this week. Hopefully next week they will have power, the flood damage will be repaired, and we can get the next revision of the headers back and test fitted.

    As soon as the headers are finalized, then we can begin production of the fixtures for the motor mounts and transmission crossmember. A run of headers will also be produced at the same time. Our low-profile E46 steering shaft assembly is already in production and the driveshaft won't take long. That's the Stage 0 kit and it could be available in a very short time... as soon as the headers are finalized.

    We finally have the wheels and tires lined up for initial the Alpha build and an LSx motor will be built soon. I will update this thread when the headers are fully production ready and we will release pricing for the E46 LS1 Stage 0 parts (should be nearly the same as our E36 LS1 parts).


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    01 Mar 2013 11:48 AM

    Quick Update for Feb 28, 2013: We have the third and hopefully final iteration of the production headers tested and they work! Finally, some progress.

    I wanted to give a quick shout-out to a new forum, "LSMotorswap.com". We have copied all of our updates since 2011 onto this thread there. We are also updating the same threads concurrently on vorshlag, corner-carvers, bimmerforums and sccaforums.

    DSC_6714-S.jpg DSC_6715-S.jpg

    Here's the final FINAL final production header, that took many more iterations and months of waiting then we had ever dreamed.

    DSC_6713-S.jpg _DSC7555-S.jpg

    We've since pulled the headers, drivetrain and motor & transmission mounts out of the car and started making production fixtures. There are some new laser cut pieces that we have to draw and order, then we can get to work cutting tubing and welding up the mounts.

    More soon,

    New Member

    New Member

    26 Aug 2014 05:06 AM
    Any more updates on this? Especially the CAN-BUS solution?

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    03 Aug 2016 07:40 PM
    Originally Posted by DougNuts

    I know there have been some updates in the last 3 years, but what's the status of LS swaps into E46 chassis these days? A close friend of mine is kicking around the idea of building one, just as a street car.

    I see that Vorshlag sells some swap parts, but what's new in regards to making it work in the chassis? Is there anything required to keep electrical items working, such as door locks, sunroof, etc.? Would a guy need to start off with a manual car? Is there a certain car (328 vs. 330) that is the clear choice to start from? Is it remotely possible to have working A/C?
    Yea, there's a lot of things that have happened that delayed a few things on some of the E46 swap development I had hoped to tackle by now. Its a bit of a long story on why we haven't done the CAN interface for the E46... but it is actually NOW being actively developed (by the 4th set of programmers we have tried to work with over the years). Let me try to explain in my long winded, picture-laden way you are used to...

    We had every intention of building this white 2001 BMW 330 Coupe into an LS1 monster "shop car", but initially we only used it for mock-up work to develop the headers, motor mounts, and other drivetrain bits. This car was purchased as a roller with no wiring harness or interior, and it would have been difficult to use it for a street car CAN-interface test bed. We did complete the LS1 "drivetrain mount" and header development a few years ago using this car.

    We have sold approx 20 sets of our E46 swap LS1 motor mounts, trans crossmembers, steering shafts and headers for E46 racers, drifters, and a few street car guys.

    During the time period where we should have started building this monster E46 LSx "Alpha" build for a shop car... we got side tracked as we developed this silly Mustang instead.

    And with the efforts learned from racing this S197 over 5 seasons we got buried in work on these cars, made lots of suspension/brake/wheel/aero/etc components for Mustangs, and it even bled over into the S550...

    After the development we did on the S197 had run its course we sold that car in mid 2015, but had two other "shop race car" projects already underway.

    One of those (C4) had a number of ideas we tested on it. We proved our theories and won the races we wanted to in that, so it is being painted right now and will be sold very soon. The red E46 above is a TT-Letter build that my wife races, but we have several development projects planned for this car so its staying around for awhile. But we do need a 2nd shop car to showcase our V8 swap efforts.

    The somewhat rare "sunroof-less" E46 330 white coupe above will now likely become a SpecE46 race car for a customer later this year instead of a V8 monster...

    ...because we got the word from a customer just yesterday to start the build on this E46 M3 chassis (above) into a MEGA-monster V8 track-only car. That we can drive at certain events. With that car we will also finally be able to develop and offer a driveshaft solution (this car will have a Tremec T56 Magnum 6-speed), an LS-capable clutch hydraulic system (clutch master + TOB + bleeder), radiator / hose solutions, and a few other bits and pieces. Since it is slated to be a "no holds barred" race car it will have: a digital dash, gutted interior, no air con, and a non-BMW ABS system, so there will be no need to make the CAN interface on this particular build.

    So yea, long story short - we haven't had a chance to build a 100% street capable LS powered E46, so we haven't spent the time to develop a CAN-BUS interface. There are a number of industrious forum folks who have working gauges, air con, ABS and more in their E46 LSx swaps. Bimmerforums has an engine swap sub-forum where you can find a few folks to help in those areas. It needs a lot of special wiring and programming to make a emissions legal, fully functional street car. I have yet to see a simple, plug-and-play solution marketed or available to help with this.

    Our CAN-interface efforts have not been for a lack of trying - we worked with 3 different programmers who said they could tackle the CAN-BUS integration of a GM computer with another computer to make the FR-S LSx gauges, electric steering, air con, and other CAN-wired bits work. So far we have very little to show for their efforts, but hopefully one of them will someday get the magic black box and programming to work. If I had a dollar for every person who told me "how easy" this should be to do...

    We've recently started working with another wiring harness supplier who makes very integrated V8 swap harness solutions for BMWs and other cars. They just purchased a set of our E46 LS1 swap headers and mounts so that they can build their own shop car E46 M3 V8, which they plan to develop a wiring solution and CAN interface for these cars. Their build is a street car so it needs ALL of the sub-systems to work.

    I also hired a technician/fabricator a month ago who can reprogram GM computers via HP Tuners, and we have that suite of tuning software here at Vorshlag now. Just earlier today he tweaked the programming to make the integrated MIL light on the 1999 Miata below to work. He wired in the Mazda water temp sensor, tach signal from the GM computer, oil pressure signal, and speed signal (through a programmable decoder box) to the Mazda gauge cluster. The MIL light works perfectly, too.

    So we're working on our own in-house "capabilities" to shorten development times on new and existing V8 swaps, hopefully trimming it down from "years" to "months". Again, we have JUST started a rather ambitious E46 M3 LS swap this week, but it will allow us to develop a few more "hard parts" for use in E46 swaps, and we have a new group working on E46 LS swap wiring / CAN interface solutions. I will update this thread when we have more to share.
    Terry Fair - www.vorshlag.com