Sunoco 468x60 Banner
PrevPrev Go to previous topic
NextNext Go to next topic
Last Post 27 Oct 2014 05:05 PM by  t walgamuth
New C mod in the INdy region
 715 Replies
Sort:
You are not authorized to post a reply.
Page 5 of 36 << < 34567 > >>
Author Messages
Dick Rasmussen
Advanced Member
Advanced Member
Posts:931


--
08 Jan 2011 08:42 PM
Locked
Basic Member
Basic Member
Posts:493


--
08 Jan 2011 11:24 PM
t walgamuth wrote:

Ok, it was very similar to yours, Dick.  I moved the column forward to the next hole which was maybe 1.5" or so.  Now I can get 1/4 turn off center each way!  My elbows are hitting my ribcage.  So tomorrow I will pull out the seat and see if I can get my butt down a bit more and the ribcage lower in relationship to the elbows.

My car shows signs of having been converted from the older style suspension to the push rod suspension it has now.

 

 



Tom, can we find a time for me to see you in your car? Email me.

You need to get the current seat out of the car.. I have a spacer that potentially could be used if you want to extend the steering wheel more...
PCalhoun
Basic Member
Basic Member
Posts:149


--
09 Jan 2011 09:54 AM
t walgamuth wrote:

My car shows signs of having been converted from the older style suspension to the push rod suspension it has now.

85F Reynards were all push-rod cars front &amp; rear from the factory, some were later backdated to the 84 style rocker arm suspension in the rear. The pictures in the original ad do not have a good shot of the rear of the car, but being that this car was owned/driven by Jeremy Treadway at some point in its life, it is a possibility that it was backdated on the rear.

Dick Rasmussen
Advanced Member
Advanced Member
Posts:931


--
09 Jan 2011 10:09 AM
PCalhoun wrote:
t walgamuth wrote:

My car shows signs of having been converted from the older style suspension to the push rod suspension it has now.

85F Reynards were all push-rod cars front &amp; rear from the factory, some were later backdated to the 84 style rocker arm suspension in the rear. The pictures in the original ad do not have a good shot of the rear of the car, but being that this car was owned/driven by Jeremy Treadway at some point in its life, it is a possibility that it was backdated on the rear.

Peter,

According to pics Tom sent previously the car is pushrod front and rear as he said. :-)

t walgamuth
Advanced Member
Advanced Member
Posts:680


--
09 Jan 2011 11:48 AM
It is push rod front and rear. I am pretty sure I know the difference between this and the rocker style which NIck's VD is. I found a picture of the car with different bodywork on the back. In fact a lower style rear is included which I trial fitted to the car last night and it will not clear the bump where the spring shock force is converted to the push rod. So perhaps it was originally an 84. I did get the wonderful factory binder with the car though which depicts everything as it is now in the car. If it was converted perhaps it was done at the factory. Today I plan to remove the seat and look at the dash to see if I can raise the steering wheel a bit.
PCalhoun
Basic Member
Basic Member
Posts:149


--
09 Jan 2011 03:30 PM
t walgamuth wrote:
It is push rod front and rear. I am pretty sure I know the difference between this and the rocker style which NIck's VD is. I found a picture of the car with different bodywork on the back. In fact a lower style rear is included which I trial fitted to the car last night and it will not clear the bump where the spring shock force is converted to the push rod. So perhaps it was originally an 84. I did get the wonderful factory binder with the car though which depicts everything as it is now in the car. If it was converted perhaps it was done at the factory. Today I plan to remove the seat and look at the dash to see if I can raise the steering wheel a bit.

If it has push-rods on all four corners, it is orignal in layout, except for any modifications done over the years by POs. None of the 85 cars which were backdated to rockers in the rear were done at the factory, they were all done by private owners w/ parts from Prince or other fabrication specialists. The 85 is a completely unique design, which was Reynards attempt to copy the success of the Swift DB1 in the States and the VD 85 in the UK. Nothing is interchangeable to the Reynard 83/4 generation rocker arm cars (like Elzinga's or Bullis'), except the rear suspension w/ a fair amount of work &amp; investment. 85s were also used by the Bridgestone Racing School up in Canada in 2.0L form up until 2 years ago.

t walgamuth
Advanced Member
Advanced Member
Posts:680


--
13 Jan 2011 06:34 AM
Hey you Indy region Cmod guys....gonna go to the awards banquet? Wanna have a cmod table?
Locked
Basic Member
Basic Member
Posts:493


--
14 Jan 2011 12:10 PM
I have a conflict.
t walgamuth
Advanced Member
Advanced Member
Posts:680


--
16 Jan 2011 11:01 PM
I have it up on the sawhorses now. I have figured out a bunch of things I can remove from the car to reduce weight. Next thing is to remove the gearbox cover to see what gears I have. With the seat out there is a lot more room to work with. I may try to reposition it before jumping to the bag seat idea.
Jim G
Advanced Member
Advanced Member
Posts:837


--
19 Jan 2011 06:43 PM
A 17:34 could make a good second or third gear (depending on your strategy). For sale now for $80! http://www.apexspeed.com/forums/sho...hp?t=43578
t walgamuth
Advanced Member
Advanced Member
Posts:680


--
20 Jan 2011 06:10 AM
Thanks Jim! I still need to pull my cover and see what my final drive ratio is before buying any gears!
t walgamuth
Advanced Member
Advanced Member
Posts:680


--
18 Feb 2011 09:36 PM

Jimmy and I determined last night that it has the 10/31 diff. We discussed gearing strategy. Our experience is with Miatas both of us so we are not really sure what speed range we need to accomodate for autocross with a FF. Any suggestions?

Since it is the taller diff I suppose we need a good low first gear to launch.

jchiu
New Member
New Member
Posts:


--
18 Feb 2011 10:09 PM
t walgamuth wrote:

Jimmy and I determined last night that it has the 10/31 diff. We discussed gearing strategy. Our experience is with Miatas both of us so we are not really sure what speed range we need to accomodate for autocross with a FF. Any suggestions?

Since it is the taller diff I suppose we need a good low first gear to launch.

I guess to clarify a bit on what Tom is asking, we are trying to see if anyone could chime in on what speeds you'd say the FF operates at (beyond the launch) for a regular autocross course. Is 40mph-75mph a reasonable range or am I being a bit optimistic on the low end?

PCalhoun
Basic Member
Basic Member
Posts:149


--
18 Feb 2011 11:40 PM

1st 12:38 or 13:37

2nd 15:36

3rd 17:34

4th 19:31

Are good starting points for a 10:31. Recommend Taylor Race Engineering (TRE) for gear purchases and use of Red Line Shockproof in the 'box. Definitely get a hold of a Hewland gear chart and plot your gears for speed and RPM drop; the chart is available on-line at hewland.com. If you get me your e-mail address I can send you one in Excel next week that is very handy to use; can't figure out how to post an attachment here.

t walgamuth
Advanced Member
Advanced Member
Posts:680


--
19 Feb 2011 06:29 AM
Thanks Pat! I have a gear chart. We had roughed out some gear selections. I'll go look and see what they are compared to your suggestion.
Dick Rasmussen
Advanced Member
Advanced Member
Posts:931


--
19 Feb 2011 08:03 AM

Regarding first gear: From my Pro Solo, etc. experience with grippy pavement and warm/hot tires an approximately 45/46 mph at 6800 rpm first gear was the tallest that I think will work without having to slip the clutch a lot versus mild tire spin IF you have straight line starts on clean pavement. If I did the math right that means for your 10:31 r&amp;p you would need the 12:38 first gear. However, if you are likely to have a tight turn near the start line then the taller first that you can use after the turn might be a better choice since you won't be doing "drag race" starts anyway. Always trade offs.

Peter's recommended second would be good for about 60 mph and the third for 72/73 mph.


Hey Peter, should we expect a new brand of FF tires given your upcoming new adventure?
t walgamuth
Advanced Member
Advanced Member
Posts:680


--
19 Feb 2011 01:51 PM

Thanks guys!

I'll go ponder my ratios!;)

t walgamuth
Advanced Member
Advanced Member
Posts:680


--
20 Feb 2011 09:46 AM

A couple of things:

1. What is the desired top speed we will need in a C mod?

2. My engine is set up to a Virginia FF club spec's which specify fairly weak valve springs which will allow float at 6500 RPM, so I am planning to use slightly taller gears to work with the rpm range which is possible. Of course I could install stronger valve springs too as far as that goes, but I don't know much about all the other variables that might be taylored to the rpm range it works at.

Thanks very much!

t walgamuth
Advanced Member
Advanced Member
Posts:680


--
20 Feb 2011 10:28 AM
I know someone already sent me a pdf or a link to the manual for the gearbox but I cannot find it to save myself. Could someone provide that again, please?
Jim G
Advanced Member
Advanced Member
Posts:837


--
20 Feb 2011 03:43 PM

Manual is here: www.hewland.com

The fastest I've ever gone in a "real" autocross is in the low 70s. But I've been at PCA and BMW events where top speed can sometimes get into the low 80s.

Jim

You are not authorized to post a reply.
Page 5 of 36 << < 34567 > >>


SPS 88x31 Button Woodhouse Motorsports
Vorshlag 88x31 Button G-Loc Button
Sunoco 88x31 Button

Advertise on SCCAForums.com and reach thousands of visitors per day!

SafeRacer FREE SHIPPING over $99

Shop for Pirelli tires at Tire Rack. blank



Sunoco Bottom 468x60 Banner