dgz924s

Mine has 29mm T bar with 400 LB Hypercoils on Paragon ride height kit. Corner balanced at near 50/50 or 25% per wheel with a total weight of 2747...I class is 2734 limit on mine. 968 bars and Koni Adjustables. Race bushings. The car is very well in set up as a few have taken it out for a test drive and are really impressed with the handling over their set ups.
I do drive daily and it is not that bad but it is a personal thing, if you wish to ride like a Caddy then stay under 250.

macnewma

DGZ, what rear sway bar setting do you use for the street and what setting for the track?

Max

dgz924s

In the middle position for both. Yet to try the stiffest setting on the track. No push or pull so far.

M758

I run 350 lbs springs with 30 mm t-bars and weltmeister sway bars. I do run a weigth reduced car, but find this to have a very nice balacne.

I could run the 350's with 28 mm t-bars and the same sway bars. I could using the bars dial out the understeer, but it was not ideal. For my car and my driving 30 mm bars are much more effective.

My take on suspensions are like this

350-400 = 30 mm (330 lbs effective)
300 = 29 mm
250 = 28 mm (254 lbs effective)

so
Alpine.. in your case rear t-bars are best at 28 or 29 mm. If you deide in the to go with 28 mm bars you can run 250 - 300 and proabably be just fine. If you go with soft front bar and stiff rear sway bar maybe 350 max, but you will lose out on traction without a limited slip. With 29 mm t-bars you can go with 250-350 may 400 lbs front. If you use 250's and 29's make sure you have a STIFF front bar and very light (maybe stock) rear sway bar. With 400's you would want soft front and stiffer rear.

macnewma

Alp-

Yes, the handling balance of your car (which end of the car loses grip first) is affected by the relationship of all suspension components front vs. rear. Read this:

http://www.tech-session.com/kb/index...v2&id=106&c=53

Basically, different combinations of front and rear spring rates will produce different handling cars. Assuming all else is equal, my car will tend to oversteer more with 400/30mm than DGZ with 400/29mm. How much is hard to tell. It can be further tweaked by adjusting sway bar settings and alignment, tires, etc.

DGZ may also have a slightly different weight distribution than we do. I would imagine our cars a bit more front heavy with the turbo, piping and intercooler. This would require less rear spring to balance it.

Max

dmoffitt

I'm running ~500lb on a 2500lb 951, yeah, you get to know (intimately) every little surface imperfection in the road (and lemme tell ya, there are PLENTY here in Rochester, NY, some of the worst roads I've seen aside from the Metro Detroit area) - but I don't find it objectionable, after the first few times driving a stiff/harsh/you-name-it car, you tune it out. I had I think it was like 780s or something retarded like that on the Tein coilovers on my RSX (~2750lb) and even THAT wasn't horrible.

Not a car to take a girl out for the first time in but you won't require dental work - YMMV, 'harsh' ride is a very subjective thing. It'd be nice to have a race car that rode like a cloud. Not gonna happen tho *shrugs*

dgz924s

I do run soft on the shocks up front. Yes my car is different vs a 951 up front. But I am just tossing what I have out there for a reference.

It will all boil down to the user asking the question as to what works for his set up needs. But we have given a good idea of his possibilities.

Alpine951

Lots of great stuff here. Thanks all. I had not been thinking that even the sway bars would add some stiffnes to the ride.

macnewma

The thicker swaybars add lateral "stiffness". You won't notice a stiffer ride in general like you will with a higher spring rate. Swaybars do contribute to the manner in which weight is transferred and therefore it affects handling dynamics.

Max

Alpine951

This is why I ask the question:


http://www.photoreflect.com/scripts/...um=0&adjust=-1

Look at those fenders swallowing up the wheels!

http://www.photoreflect.com/scripts/...um=0&adjust=-1

dgz924s

Sways will help that issue, not entirely but will control some of the dipping.

Or just don't go that fast to create the dip! Go with the stiffest sways you can and go 300 on the springs on ride height adjustable perches. You can always change springs as they are the cheapest upgrade. If not to your liking, add more T bar to get you there. Do your set up in stages to a point of satisfaction rather than completely re do the suspension. Lowering the car will also help the dipping.

Alpine951

I just put in the 968 M030 bars in the rear four months ago. They're on the middle setting. I also put on what I thought were the M030 fromt 30mm bars but later realized they where the Turbo S 26.8mm bars.

APKhaos

I'm swapping my 700# rears for 750#s this week. A little fine tuning.

J.PELLEGRINO

John is correct,it is the shock valving that will impact the ride quality far more than the spring rate.Since bumps require great wheel travel in a very short time,the sensation will be much more dramatic than a body roll input which is a much slower shock movement.Spring rate is usually linear as apposed to shock travel which is not.The spring rate you are considering will work well,providing it is matched with the appropriate shock absorber valving.Good luck,Jerry

dgz924s

Jerry...

What do you race the SC in?

Care to lend it to me for Barber 250 so I can go spank my friend in a cup car! j/k