Springs?

[Per Akesson]

What springs do you run when you go autocrossing? Front? Rear?. I loose the grip on the front wheels when I accelerate through tight corners. Any suggestions?

[JoeE]

Need more info on your setup.

IRS, 3-link, 4 link

What rate and type of springs you currently have..

[Per Akesson]

3-link and standard koni springs wish I think is 500lb front and 350lb rear.

[Sanford]

Too tight a posi will contribute to that. A more agressive front end alignment will help too, more neg. camber and more caster. Max caster if you have power steering.

My setup, still evolving (thinking of power steering)
I added a tru-trac which helped; when I accelerate in a turn it doesn't launch ignoring the front wheel direction. Also the car will turn when initially off the throttle or tap the brake as the weight transferrs front but doesn't last long. The rear will also slide out a "little" when I let off the throttle which helps in pointing the car, easing back on the throttle brings grip back to the rear.
I just learning to work with these traits. I'm running 3-link, Koni's 500# front and 250# (changed to eibach) rear, 3/4" front bar, 2 deg neg camber and 4deg caster. 245-40-18 and 275-35-18 rear Kumho XS. I'm still learning and its fun.
More people with a lot moer experience on this board.

ps, I added the front bar and needed to add more camber and caster to gain back the front grip. No rear bar and I don't think I need it now but may change with P.S and more caster. We'll see.

[JKleiner]

Mine: 3 link, FFR Konis on second detent all around, 750# front, 500# rear, no bars. Camber is -1.5, caster +8, 1/16" toe in. Kumho XS 255 front and 315 rear. I can make it push with an abrupt off throttle move but it seems to be pretty neutral naturally with heavier throttle input inducing oversteer.

Jeff

[JoeE]

I have same setup as you and I bought 700lb Eibach's for the front and switched the FFR 500 fronts to the rear. You need to swap out the springs on the FFR Koni's. I went with the stiffer springs b/c my UTC exhaust is making a front bar very challenging to mount.

I also am running 275 17 and 315 17 R compound tires. I ran in an event last weekend and it was a night and day difference from the stock springs and Sumi tires.

here is a good thread
Koni spring rate