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Discussion Starter #1
Hi Guru's,

So a bit of history... i have a 05 non-sport back elise,, which had the
skinny 175 fronts (ad007)... the car was understeering quite a lot the
way it was... a constant argument to drive.

Last year i went from 175 -> 195 and switched all rubber with a048's
The car suddenly became very nuetral,, and a bit oversteery which
was managable and predictable...loved the handling of it.

This year, i went with 3-way nitrons and substify... and had the first shakedown
at the devans airfield last weekend... one thing to note is, there was light
snow in the morning and the temps were at 33F-38F through out the day.
I could not get any temps on the tires... i was running 26F 29R and it was cooler
to the touch then holding a fresh dog poop in plastic bag in your hands :)

So with the new setup + cold temp's the car went back to understeery
from its neutral state before.. body roll is not existent anymore, and it feels
like a gokart.. The rear is planted nicely, and is even more predictable and
confidence inspiring,, however the understeer is back.. :/

So i am thinking, its either 1 or more one of these reasons:

1- cold tire temps...could not keep heat at all
2- car quite stiff, could not put enough weight on front under braking = more understeer
3- time to go from 195's to 205's in the fronts?

Video from that run:

https://www.youtube.com/watch?v=KlYi0puo0Fw

thoughs, suggestions etc welcome
 

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Have you removed front camber shims? That would help a bit and is free and easy.
 

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It's hard to put heat into the tires at an autocross. Even on 90 degree days, I could barely get my Hoosiers into operating temperature on a 60 second course (a co-driver probably could have helped with that). I wouldn't start thinking about adjustments until you can run in proper temperatures.
 

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Don't consider 205s on the front, unless you have the seven spoke forged (wider) wheels. On narrower wheels it will just be a bad fit, and tend to bow the tread outwards at the center.
 
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