Well on most cars that are not trailored to the track and do see some street time we arent running skinnys on the rear. My question is what should I do with the rear tires while AT THE TRACK only if im running normal wheels and tires in the back. From what I understand you want to run higher air pressure in them to have less friction however how high can you pump them up without any problems. Most tires Ive seen usually say 44 psi max. I understand I will only have the pressure like this at the track but I just want to know the correct way to do this.

 

tire pressure will make a difference from a flat low pressure tire to a high psi tire. but i dont feel that high high tire pressure is going to reduce the drag on that tire. There's still contact patch which will be the same regardless of how high tire pressure you go with.

best way to go is get skinnies. not that hard to switch them over. takes less than 10 minutes to put skinnies on.

 

but it also costs money lol

 

lol of course, going fast costs money

 

Besides how much are you going to gain. May be a tenth.

If your chasing a points battle, yea it might make a difference. For most of the guy's it's not really going to make a big difference.

Hey, it's your money...

 

the times i drove on the street, i just drove on my skinnies.

didn't make a difference except sharp curves you have to slow down a lot more.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ExospeedAMcrx &raquo;</TD></TR><TR><TD CLASS="quote"> There's still contact patch which will be the same regardless of how high tire pressure you go with.

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The contact patch is smaller with higher pressure. That is why it wears down the middle on overinflated tires.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxmatt &raquo;</TD></TR><TR><TD CLASS="quote">

The contact patch is smaller with higher pressure. That is why it wears down the middle on overinflated tires.</TD></TR></TABLE>

....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxmatt &raquo;</TD></TR><TR><TD CLASS="quote">

The contact patch is smaller with higher pressure. That is why it wears down the middle on overinflated tires.</TD></TR></TABLE>

ya but how much inflated does it have to be for it to bulge in the center to reduce contact patch. My family owned a tire shop for over 20 yrs, I've overinflated alot of tires, and it takes alot more than 44psi to for a 195 wide tire to start bulging up.

 

It's common sense if you overfill a tire you will have premature wear in the middle. The tire won't appear from looking at it to be "bulging" but there is less rolling resistance since not all of the tire is making full contact with the road. That gets even worse at speed when the the tire expands and the center pushes out even further.

 

hehe ok matt. I do agree somewhat.

I was just saying at44psi, it wont do much. alot of tires ask for 40-44psi already for reg use.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ExospeedAMcrx &raquo;</TD></TR><TR><TD CLASS="quote">hehe ok matt. I do agree somewhat.

I was just saying at44psi, it wont do much. alot of tires ask for 40-44psi already for reg use.</TD></TR></TABLE>

I agree, for what he's doing it won't do anything as far as improving his times.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ExospeedAMcrx &raquo;</TD></TR><TR><TD CLASS="quote">lol of course, going fast costs money </TD></TR></TABLE>

i understand that but im trying to make the most out of what i have.