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Joined: 2/13/2005
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I recently bought a 86 pontiac fiero and plan to run it in sm2. I have only run front wheel drive in the past and need advice on how to change my driving style. I ran the car in one event and found out that left foot braking did not work(the car would just push horrably. I am going to a test and tune sunday and want some advice on what to try.
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Joined: 5/29/2004
Posts: 138
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While a change in driving style will help, the fundamental problem is the car. In an effort to prevent oversteer under any conditions, GM "tuned" the Fiero to understeer, especially in extreme situations, and left foot braking certainly qualifies as extreme.
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Joined: 12/31/2003
Posts: 834
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Mid engine is the "right" configuration so the prime goal should be tuning/modifying the car to handle properly :-). I would hope that in SM2 you will have the rules and design flexibility to kill the understeer without making the car too tail happy. Lots of mid engine drivers left foot brake (Michael Schumacher for one) so I'm sure it isn't the real problem (I'm too uncoordinated to have learned to lfb). One key driving point is to get the turning done in as short a time/distance as possible so you can unwind the wheel and get on the power ASAP.
Dick (who has a lot of experience with a mid engine Lotus Europa and a mid engine Formula Ford)
Dick CM 85 85 Van Diemen RF-85 FF1600
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Joined: 6/9/2004
Posts: 209
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[QUOTE]Originally posted by rjohnson999: While a change in driving style will help, the fundamental problem is the car. In an effort to prevent oversteer under any conditions, GM "tuned" the Fiero to understeer, especially in extreme situations, and left foot braking certainly qualifies as extreme. Yeah, but non-stock is all about fixing stupid problems like that. :beerChug:
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Joined: 10/6/2003
Posts: 54
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I've driven cars of all drivetrains. The same rules apply. Cars really all do the same things. just drive the car like you would any other. don't think the car will be wildly different from anything else as it isn't. remember it's just got 4 tires and an engine like anything else. the placement of the engine will just change the feedback the car gives you. drive smoothly like you would in your old car or in any car. you will quickly learn what the car needs.
fast drivers know this and that the same rules for car control apply to all cars. this is why they can drive anything fast.
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Joined: 5/29/2004
Posts: 138
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No "buts" about it. That was the point.
[QUOTE]Originally posted by DA9 Integra: [QUOTE]Originally posted by rjohnson999: While a change in driving style will help, the fundamental problem is the car. In an effort to prevent oversteer under any conditions, GM "tuned" the Fiero to understeer, especially in extreme situations, and left foot braking certainly qualifies as extreme. Yeah, but non-stock is all about fixing stupid problems like that. :beerChug:
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Joined: 3/13/2001
Posts: 2185
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Howdy,
When you say "left foot braking" do you really mean "applying the brake with your left foot to help the fwd car to rotate"?
If so... No that isn't going to work on a rwd car (front or mid engine). Applying the throttle & brake at the same time keeps the driven wheels somewhere near equilibrium, while the non-driven wheels are braked. For fwd, that can help break the back end loose when you need rotation (at least, that's the theory). On a rwd car though, all it does is put more load on the (probably already overworked) front tires. Exactly what you _don't_ want.
Other than that, I've never experienced a difference with rfb or lfb with the drive layout.
Mark
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Joined: 3/20/2002
Posts: 891
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First off that poor Fiero was "made" to understeer , can't have American guru drivers in an oversteering car or they'll sue you. You can left foot brake in a RWD car , my old Volvo 144 rally car was set up for left foot braking by the Finn that built it. But rally left foot braking is done in short pulses except......there is one technique where you can intentionaly overcook a set of corners put the car completely sideways , keep the brakes on , a bunch of opposite lock and the gas pedal pinned. Just as the car is about to spin you unwind the steering lock and literally pop off the brake pedal , the sudden application of power keeps the car from spinning and you will put the car in an intentional tank slapper which should corresponde with the left right left of the road. (not to be confused with Scandenavian flick which is similar in technique). The technigue also works well if you over do it on the exit of a hairpin - this is obviusoly not going to be used at an Autocross or road course. Would likely end in a rollover on pavement. For Auto-X I'm not sure LFB is the hot way to go. In the D-sports racer I left foot braked only becuase once you left the pit lane there was no need to use the clutch to up or down shift.There were points on track where you would have both gas and brake on at the same time but this was more due to the motorcycle engine than trying to get the car to rotate. Just curious: have you attained good result left foot braking?
Tom
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Joined: 2/6/2003
Posts: 1776
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[QUOTE]Originally posted by TOM GROSSMANN: First off that poor Fiero was "made" to understeer , can't have American guru drivers in an oversteering car or they'll sue you. After the Nader Corvair debacle can you blame them?
Also to be fair, Toyota uninstalled its rear sway bar in 86 and subsequent years MR2 after debuting with one on in 1985. I never experienced anything resembling wild oversteer or unstable behavior on my 86. Apparently there must have been loads of oversteer on the 85 from the extreme negative camber I saw on some cars.
Todd Rupp did not left foot brake on his Fiero (or any car) that he won Nationals with. He did call the Fiero handling strange but it did not seem to hurt him. :eek:
When I asked what I was doing wrong in the MR2 he commented on braking too much...because I am a LFB kind of guy who unfortunately gets the temptation to use it too often and too hard. Do get good results rotating the rear end of FWD cars, but agree with others that it works well on just about any car. [QUOTE] For Auto-X I'm not sure LFB is the hot way to go. Heh, if its good enough for Schumacher and Daddio......... ;)
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Joined: 3/20/2002
Posts: 891
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I have an 85 MR2 and find it quite balanced but it has Tokico dampers on it (don't know what bars) As for Schumacher and LFB , well he is a Kart racer , and F1 drivers aren't using the clutch to shift. Also I once read a interview with one of his former team mates that had to run the backup car which was set up for Mikey - the driver said the car had scary oversteer. Watch in car Suzuka video , on the final right hander in the esses (this is headed to the uphill left with ferris wheel in background) Schumacher runs the car about a foot more to the left on the exit than any other driver - Senna did the same thing.They are obviously winding in less steering , freeing up the car , and I would imagine they are uisng techniques to accomadate this. I'm not sure I want to try something that works for F1 elite as I'm no Schumacher. Now if we could only get Mikey to a few Autocrosses to see what technique he would adopt. It is ironic you mention braking to much , trail braking seems to be lost art with ABS. I have students at track days that sometimes don't understand that braking less means less pedal pressure and not less distance. I.E. stand it on the nose then gas through the corner in an attempt to gain back the long gone momentum. Still I'm curiuos as to how many national level competitive drivers left foot brake.
Tom
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Joined: 9/26/2002
Posts: 147
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[QUOTE]Originally posted by TOM GROSSMANN: Still I'm curiuos as to how many national level competitive drivers left foot brake.
Tom It's about 50/50. I LFB, but am far from a contender on the national level.
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Joined: 3/20/2002
Posts: 891
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then we went to Fresno , Fresno no one goes to Fresno anymore.
Of the 50/50 is it safe to say they are in FWD??
Tom
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Joined: 9/26/2002
Posts: 147
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[QUOTE]Originally posted by TOM GROSSMANN: then we went to Fresno , Fresno no one goes to Fresno anymore.
Of the 50/50 is it safe to say they are in FWD??
Tom We actually have our local events in Atwater, at Castle AFB. Not all are in FWD. Mitch Fagundes (former s2000), Kevin McKormick (sp?), Katie Elder, Tom Ellam, Vic Sias, Chris McKinney, Rick Gould, all people we see at least a couple times a year. I believe they're about split, but don't quote me on that. Come out to Fresno Events! 5 runs! Atwater concrete! Courses will be wider now, we got too many people complaining about that last year. Come on people! Support us!!! Sorry, had to try to get more people to visit.
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Joined: 3/20/2002
Posts: 891
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Tim the Fresno referance was from "Airplane" - Some of our Vegas guys go up that way. I seem to recall about a decade ago you ran at the mall.
Tom
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Joined: 9/26/2002
Posts: 147
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I wasn't autocrossing a decade ago, but I hear the old guys talk about the fairgrounds sometimes. Crap, I should have known the "Airplane!" reference! My mom's gonna beat me. the invitation to come race with us is still open though.
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