Quote:
Originally Posted by NevadaSTi
As I remember it I would typically run 38psi in the front, and 42 - 44 in the rear.
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I don't claim to be an RE070 expert, but I want to say at autocross they guys were shooting for 40-44PSI warm in the front. A pyrometer or chalk will help you dial in front presures for optimal front grip, and then you adjust the rear pressure for handling.
Most often, you take the rear higher to help free it up and allow the car to rotate or at least get it nuetral.
Quote:
Originally Posted by NevadaSTi
I haven't yet played with the camber. What will -1 degree of camber do for my car and its handling? Is it something I can do myself, or do I need to take it into a tire shop and have it re-aligned?
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An alignment rack is you best bet unless you want to go crazy like Scott and I do and use laser levels, plastic bags, and "Lowes" creations to do your own alignment.
Most Imprezas are factory set to 0 to -.5 degrees of front camber. You'd like -1.5 or more for Autocross or the track, and even 1.0 would be nice for better street handling. That is about all you can get out of the stock bolts which is all you would be permitted to use in AS.
The rear typically has -1.5 from the factory.
Why do they do this? Well, we are bozo Americans and don't know how to drive, so they build understeer into the cars. the -1.5 in the rear makes it very sticky. The 0 in front makes it very un sticky, thus understeer.
Note: Negative camber will make the inside edges of your tires wear a little faster especialy if you do a lot of long highway miles with miniimal cornering. But it is the price you pay for having better handling in the corners.
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