Suspension mods
07-02-2006, 03:53 PM
#46
Former Vendor
Fair enough Van. My point being that you are playing at the high end of the bell curve from both a skills/experience perspective as well as funding. We all aspire to be there 
Most guys reading the thread are in the middle of the bell curve and the benefits / tradeoffs are a bit different.
Most guys reading the thread are in the middle of the bell curve and the benefits / tradeoffs are a bit different.
07-02-2006, 06:35 PM
#48
Nordschleife Master
Originally Posted by Chuck Moreland
Too much of the advice in this thread reads like one-size-fits-all. It doesn't.
VZ935 drives .....wait for it....... a 935. And has a lot of racing experience. Coils are the right solution for him and probably a handful of others reading this thread. But these needs are not in line with the vast majority reading this thread.
There is no inherent performance benefit to coil overs. Their advantage is they are easier to change out track-side and can achieve higher wheel rates than tbars. Down side - cost and the need to reinforce the chassis. If you don't plan on running super high rates or changing springs trackside, you will do just as well with tbars.
Bottom line is that coils are right for a few, but the vast majority of the people reading this thread can save their money and stick with tbars.
VZ935 drives .....wait for it....... a 935. And has a lot of racing experience. Coils are the right solution for him and probably a handful of others reading this thread. But these needs are not in line with the vast majority reading this thread.
There is no inherent performance benefit to coil overs. Their advantage is they are easier to change out track-side and can achieve higher wheel rates than tbars. Down side - cost and the need to reinforce the chassis. If you don't plan on running super high rates or changing springs trackside, you will do just as well with tbars.
Bottom line is that coils are right for a few, but the vast majority of the people reading this thread can save their money and stick with tbars.
07-02-2006, 07:00 PM
#49
Burning Brakes
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Originally Posted by 38D
[snip] But for a street car, I personally would just stick to TBs.
07-02-2006, 07:31 PM
#50
Rennlist Member
Originally Posted by 38D
Ok, so ~2800lbs, 325rwhp and dunlop slicks. Hmmm. Assuming the suspension is stetup well, I think you might be able to be in the low 2:07s or even high 2:06s. I am basing that off Bob Scotto's 2:05.1 on Dunlop slicks at the Glen race, and VIR is a second of so slower than the Glen. Bob's car is a little lighter, but you've got a bit more power, so net-net probably similar. At the average DE, low 2:09s/high 2:08s is probably the max as you just are not going to get many (if any) clean laps, nor are you going to have many people to run with/chase at that speed.
As for the 1:40 at Road Atlanta: I ran a 1:40.8 in my '94 Turbo in January '05. Stock engine, with sport seats, et al (car ~3200# plus my 210lbs) and everything on MPSCs with the ambient 32 degrees. So that's less power, more weight than A930Rocket and MPSCs which many on this board will tell you suck *** in cold temps. Based on that (and I have the video to prove the time), I think A930Rocket can do much better in his car. Oh, and that was me 1.5 years ago before I started to race. I'm sure I'm faster now. Find good competition and you will improve. It is one of the reasons I bought my Cup: I want to learn from Scotto, Savenor, Burger, and Westerduin!
07-03-2006, 02:42 AM
#51
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Originally Posted by riverflyer
The 1:59 that RSRS reported was very admirable but 1:48. I have a friend who is a very good and experienced driver with a comp coupe and he is only turning in the low/mid 50's.
What kind of setup and mods were you using to turn this time??
What kind of setup and mods were you using to turn this time??
I know a radicalSR3 on race tires turning best laps of 154.8, so I ask again, what kind of mods got you to 1:48?
I have heard of times going into the 1:40's just have never been there to see it in person!!
07-03-2006, 04:31 AM
#52
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Originally Posted by Peter Carroll/Toronto
I think I'm running about 2.5 degrees all around at the moment - with 235/315x18 rubber. That camber seems to work well for me and is not too crazy on the street.
The car is quite fast with torsion bars, but it's not all that easy to drive fast. It has a really good setup using 40 year old technology. It is vintage.
Generally the only cars that pass me are using coilovers. And they pass me big time. So there is no question they are better.
However, coilovers are another level of committment. The shock towers in the 911 were never intended to support the weight of the car. If you want your chassis to last you need a lot of reinforcement and preferrably a cage. So in a race car sure. But mine is a street car.
That's my 2¢
Peter
The car is quite fast with torsion bars, but it's not all that easy to drive fast. It has a really good setup using 40 year old technology. It is vintage.
Generally the only cars that pass me are using coilovers. And they pass me big time. So there is no question they are better.
However, coilovers are another level of committment. The shock towers in the 911 were never intended to support the weight of the car. If you want your chassis to last you need a lot of reinforcement and preferrably a cage. So in a race car sure. But mine is a street car.
That's my 2¢
Peter
-Garen
