Quote:
Originally Posted by cdrptrks
I think higher front tire pressure creates less contact patch and more inside front wear with aggressive camber for street driving. That was my experience when I tried it with -2.8° front camber and 0 front toe. Now I use lower than normal front tire pressure on the street.
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Well I have experienced just the opposite using 38-40 PSI I get about 20K miles out of my Michelin 4S on the street using -3.8 front and -2.8 rear camber. I was told to do this by a VERY experienced alignment guy and I took his advice since he certainly knows a hell of a lot more than I do in regards to suspension set ups.
It makes sense when you think about it because IF the tire was PERFECTLY flat (camber was ZERO), then YES; the CENTER of the thread would make more contact with the road surface as inflation pressure increases. BUT, with MORE negative camber, the inside edge would have a tendency to have MORE contact with the road surface than the CENTER of the tire, so the additional tire pressure would counteract that tendency.
Now the REAL reason this all came up was I told DOGHOUSE PERFORMANCE who sets cars up all the time for both track and DD that I DID NOT want to have to change my alignment settings back and forth all the time. He was the VERY first person to tell me that it was DEFINITELY possible to accomplish this if we ran virtually no TOE In or TOE Out. He said THAT was the main culprit of excessive tire wear.
The only compromise I have noticed doing this is that 38-4O PSI pressure in your street tires definitely results in a firmer ride and I have no doubt that I could probably get 5-7K more miles of treadwear on my Michelin 4S street tires if my alignment settings were more conservative but thats all good with me.