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Old 06-06-2006, 10:28 PM   #1
waktasz
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Join Date: May 2005
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Default 2 autox questions: Tires sizes/heat and alignment

Ok two questions...first regarding alignment.

I have heard from various sources that I should get camber bolts in the rear to bring the camber back to around -1.5 (currently at about -2). Front camber is maxed out at -1.8. This decision would ultimately sacrifice total grip for a slightly more oversteer prone car, right? Do you think it would be worth it to make that comprimise?



Also...at this weekend's autox I had what was either a breakthrough in my driving or just a super lucky weekend. I finished 2nd in STU by about .3 secs and beat a few guys that usually beat me by around 2 seconds on a 50 second course. The course this weekend was unusually short, about 34 seconds. Could it be that the bigger tires on most of my competition were not warming up enough (most were Evos running 245/45s, I run 235/40s) and therefore not producing the grip they are used to getting?

Just a thought.
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Last edited by waktasz; 06-06-2006 at 11:32 PM.
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Old 06-06-2006, 10:51 PM   #2
leecea
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Looking at your location, I wonder if the short course was at Boeing and the longer ones at Ripken or Warminster. If so, I think the differences in speed and tightness of the course are a bigger factor than tire temps. Even so, beating people who are usually that much faster is grounds for celebration
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Old 06-06-2006, 11:19 PM   #3
BIGSKYWRX
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If you want to dial out additional oversteer and you absolutely can't get more front neg camber (that is the more desired way)- then yes dial some positive camber into the rear. Everyone is different, but I prefer a ~ .8 difference front to rear. thus in your case I'd dial down to about -1.0 (I wouldn't go any lower than -1.0 though).

My guess is heat in the tires was not a factor- I'd chalk up to good driving
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Old 06-06-2006, 11:31 PM   #4
waktasz
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Quote:
Originally Posted by leecea
Looking at your location, I wonder if the short course was at Boeing and the longer ones at Ripken or Warminster. If so, I think the differences in speed and tightness of the course are a bigger factor than tire temps. Even so, beating people who are usually that much faster is grounds for celebration
You are correct sir.
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Old 06-06-2006, 11:41 PM   #5
tuskenraider
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Quote:
Could it be that the bigger tires on most of my competition were not warming up enough (most were Evos running 245/45s, I run 235/40s) and therefore not producing the grip they are used to getting?
Most of the top autox tires don't need much heat, if any, for optimum performance. Still, it's brand dependant and even so, the small difference in size is undoubtedly irrelevant.
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