Suggested Spring Rates For Track Work

[Do-Luck]

I'm not 100% certain about the offsets, but sort of just getting some ideas at the moment. Main thing to sort out is the suspension first.

Would you maybe suggest I run 17x8 +25 up front, while leaving the 17x9 +17 on the rear?

[Simon-S14]

some points.

I run 17X9.5 + 17 work XD9's and 235 tyres and they dont rub, my guards have been hand flared but not heaps... they wouldnt fit stock guards thats for sure. However im assuming most ppl here have rolled guards as a minimum.

I also run 7 kg front and 5 kg rear in my skyline, R33 front LCA's with new bushes, stock upper control arms with new noltec bushes also (didnt want upper camber arms) and this combo gives me 2.5 - 3 degrees (depending on the height i run) handling is fantastic and i have found that the longer LCA"s have almost eliminated any bump steer and they make for a very direct feel on the track.

Ive got the SK sway bars all round and run them medium front and soft rear, along with that ive got traction rods in the rear which ive spent a lot of time setting up, i was running 5mm longer then stock, with slight toe in an minimal camber and the rear grip was great. i have since changed all the specs for an upcoming track day (drift but i do some grip here an there) in the search of getting even more grip.

[Simon-S14]

another thing to note is that with the longer LCA's on the front it pushes the bottom of the wheel out and the top in (giving you that camber) it also means you have more room to run decent offsets all round.

[BHDave]

A 235 RE55 is a big tyre. It'd be close to a 255 road tyre in width. On a 9 inch rim there is no stretch. It sits square.

To fit a 235 RE55 under the front of my gtst i needed gtr guards and i run a 17x9+25 rim for track work with around 3 degrees camber.

I previously ran a 215 AO48 on the front with a 17x8+30 rim with stock guards. Even that was close.

I actually have those wheels and tyres on an s13 atm with s14 LCA and about 3.5 degrees camber and it doesn't scrub at all and isn't an obvious offset fail