sal_l

Pilot Sport A/S Owners - What's your PSI?

HPH

37. But I have 245/50s

itacud

Same size, 42f/38r for hussling.

RMcQ

have some concern about wearing out the middles, but with heavy car I need all the stiffness I can get for "hussling" as itacud puts it.

TheLex

This is my first experience with AWD. With RWD, my rears are always higher pressure than the fronts. Is the reason your fronts higher than the rears due to the AWD?

BTW, I took out the SL for the first time in a while, and going around an offramp, I was like "whoa, that rear feels loose!" AWD definitely has tremendous dry performance/security benefits.

itacud

YZF996... originally suggested that I try the high pressure up front. Track testing confirmed, roll over of the front tires diddn't reduce to acceptable levels (under hard cornering) untill the cold tire pressure was up quite high.

I'm a little worried about running that pressure for commuting, however, as it seems to be wearing away the centers. I think I'll drop pressures a little - but it will understeer more

TheLex

because I'm a bit suprised that the car doesn't have balance problems with higher pressure in the front. Then again, with awd, I suppose that makes up for any difference.

itacud

Are you wondering about differing outside tire diameters due to pressure differences? Hmmm... not sure if the weight up front eliminates that problem?

But, now I'm wondering if it might not be good for the torsen diff to have appreciably different pressures for normal commute duty?

TheLex

of having higher front lower rear air pressures vs. the traditional lower front higher rear air pressures. With RWD, normally the rear air is higher. With FWD I think it's higher front pressures to counteract the terminal understeer. But with AWD you're running higher front lower rears. I think the Audi AWD system sends the majority of the power to the rear wheels, so I assumed that the rear air pressures would be higher. but you're saying it works better the other way around? confused...

itacud

....traction than the other.

That said, it's really the weight distribution that makes the car terminally understeer. The front wheels get overloaded first and they give up. This is made much worse, by the tires rolling over. So, the high front tire pressure just helps to deal with this weight, and to keep the tires on the optimal portion of the rubber.