S2000 ready to drive!
#1
S2000 ready to drive!
Hey guys, i need some help....
My car is an 2006 mdel and i changed a lot.
the weight of the car is incl driver (me 100kg) full tank 1.300kg
my suspension is an JRZ 1 way adjustable coil over kit
crossweight is 50/50
front and rear CE28N 9*17 Offset 35
tires front and rear 255/40 R17 Michelin Cup Semislicks
1 mounth ago i tried this setup
Front -2.5 camber
Rear -2 camber
Toe @ front 0
toe @ rear total +20 degree
Caster total 7.20
the car was very neutral and @ the limit the car began a little bit to oversteer, but the car was easy to handle.
but 1 week ago i was on track again and tried a new setup.
front -2,5 camber
rear -3.5 camber
Toe @ front 0
toe @ rear +20 degree
caster total 7.70
this time the car understeer a lot, it was horrible..... the car was so slow, in long corners the car understeer so much, that an 350Z overtake me easily...
what was wrong??? my tire pressure was at the beginning of the race 1.9 BAR (27.5 PSI)
after 30 minutes my pressure was round about 2.3 BAR (33,3 PSI)
than i put some air out and did again 1.9 BAR.
tyre temperature was in best condition at the front and rear round about 70 degree (158 F)
so i dont know how all the S2000 can run fast times with that cind of setup.
i want to try in the next time front and rear -3.5 degree camber.
@ this time i think the better setup is to ran @ the front more camber than the rear.
i hope that some proffesionals can help me
My car is an 2006 mdel and i changed a lot.
the weight of the car is incl driver (me 100kg) full tank 1.300kg
my suspension is an JRZ 1 way adjustable coil over kit
crossweight is 50/50
front and rear CE28N 9*17 Offset 35
tires front and rear 255/40 R17 Michelin Cup Semislicks
1 mounth ago i tried this setup
Front -2.5 camber
Rear -2 camber
Toe @ front 0
toe @ rear total +20 degree
Caster total 7.20
the car was very neutral and @ the limit the car began a little bit to oversteer, but the car was easy to handle.
but 1 week ago i was on track again and tried a new setup.
front -2,5 camber
rear -3.5 camber
Toe @ front 0
toe @ rear +20 degree
caster total 7.70
this time the car understeer a lot, it was horrible..... the car was so slow, in long corners the car understeer so much, that an 350Z overtake me easily...
what was wrong??? my tire pressure was at the beginning of the race 1.9 BAR (27.5 PSI)
after 30 minutes my pressure was round about 2.3 BAR (33,3 PSI)
than i put some air out and did again 1.9 BAR.
tyre temperature was in best condition at the front and rear round about 70 degree (158 F)
so i dont know how all the S2000 can run fast times with that cind of setup.
i want to try in the next time front and rear -3.5 degree camber.
@ this time i think the better setup is to ran @ the front more camber than the rear.
i hope that some proffesionals can help me
#2
Registered User
Do you have a stiffer front sway bar? Try running -2.2 camber up front, and -2.7 camber rear. Dial in a little more toe-in in the rear. 0 toe up front is good. You need to run more pressure in your tires. I'm not sure what those Michelin's like but try 37-40 psi hot.
#3
Former Moderator
You shouldn't compare yourself to another car but instead look at your shift points or speed at the end of a straight or even better a lap timer.
My guess is that you've increased rear traction with more camber and now the front feels like it's pushing more.
Try to gain more traction in front. Loose some dynamic camber to gain more static camber because that's what's going to help you in fast sweepers.
I'm not a professional so take the info as that.
My guess is that you've increased rear traction with more camber and now the front feels like it's pushing more.
Try to gain more traction in front. Loose some dynamic camber to gain more static camber because that's what's going to help you in fast sweepers.
I'm not a professional so take the info as that.
#4
I think it's the 20 degrees of rear toe-in that's slowing you down...
#5
You added a lot of rear camber, and you went from some oversteer to now having understeer. Sounds right to me. Dial out the rear camber and you will be back to normal, ish.
#6
Former Moderator
Originally Posted by robinson,Sep 3 2009, 01:08 PM
You added a lot of rear camber, and you went from some oversteer to now having understeer. Sounds right to me. Dial out the rear camber and you will be back to normal, ish.
#7
^^^ I agree. Try to maximize front grip before you start to remove it from the rear. If possible try to bring the front camber to 3~3.5 degrees. Try not to change too many things @ once. Also, you could run a bit less toe-in in the rear.
What spring rates are you running? Sway bars?
What spring rates are you running? Sway bars?
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#8
Registered User
Originally Posted by ZDan,Sep 3 2009, 10:41 AM
I think it's the 20 degrees of rear toe-in that's slowing you down...
#9
Registered User
Originally Posted by mikegarrison,Sep 3 2009, 05:15 PM
Yeah, that's obviously not what he has. But what does he have?
#10
Originally Posted by macr88,Sep 3 2009, 01:47 PM
The idea is to keep increasing traction at each end until you maxed it out and at that point if nothing can be done within reason then remove traction as a last resort.
Best thing you can do is find the right settings for your car and driving style. This takes lots of work and its a trial and error process. Buy a needle pyrometer and keep a journal of the setting, temps, PSI, and your thoughts. It may take a little while to figure it out but these are the secretes to going fast and you won't get detailed settings form anyone.
If I were you, I'd start at -3