Thread: sti springs
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Old 2005-10-14, 09:56 AM   #22
sperry
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Real Name: Scott
Join Date: Nov 2002
Location: Portland, OR
Posts: 20,335
 
Car: '09 OBXT, '02 WRX, '96 Miata
Class: PDX/TT-6
 
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For you guys running a ton of negative camber... remember that it is a trade off. Sure the tire flattens out in the curves, but the drawback is that you don't have all the tire to brake with.

For example, I was running my usual -3.5 deg of autocross camber at my 1st trials event. The car handled the corners great, but the excessive camber (and associated toe out) meant I had very little contact patch for the heavy straight line braking sections of the course. By dialing back to about -2.0 deg of camber, I picked up a lot more traction in the braking zones allowing me to go much deeper into the zone which lowered my times far more than increase in time from the lower traction in the corners.

In addition, my tire wear on the first few runs w/ the -3.5 deg of camber was horrible. The braking was *way* overheating the inside edges of the front tires, and the uneven wear was visible after just 2 or 3 runs.

Using a tire pyrometer is a great way to figure out the balance between cornering and braking with regards to camber. By taking inner edge, middle, and outter edge tire temps, you can emperically determine if you need more or less camber, and more or less air pressure.
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