Tire Pressure
On The Tree
Joined: Jun 2002
Posts: 109
Likes: 0
From: LA New Orleans Marrero
Re: Tire Pressure Well i belive. for the car you should do this. i been running 35 PSi in front and the back. but now my Nitto's are wearing just a little to much in the middle of the back tire's. i think you should try 30 PSi all the way around OR to 32 PSi all the way around... i been trying to get in touch with Nitto all dam day and can't get a hold of them.... i'll be putting my new set on soon after it get's out the shop. if i was you bud i would not run 35 PSi in them. that's a tad to much seems... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" alt="[Firebird]" title="" src="graemlins/formula.gif" /> heeh dont feel bad im still looking for the right PSi...
Staging Lane
Joined: Sep 2002
Posts: 78
Likes: 0
From: Austin, TX
Re: Tire Pressure Tire pressure will depend on the tire. Stock F1's? Go with 35 front and rear for street.
Softer tire, like Nitto 555's? Go with less. I'd try 32 both ends for the street and go to a track day to find out for the track.
Your handling on a track will tell you. Start with equal pressure front and rear.
If the car oversteers (loose, back end comes around), drop a couple of pounds in the rear on the outside that is loose. If the car understeers (tight, front won't turn fast enough), drop a couple of pounds on the outside front that is tight.
This assume youn start with enough pressure to not be underinflated to start with.
Once you know the offset for that track (you KNEW there was reason to practice and wear out all those tires, huh?), then try adjusting the overall pressure up or down a couple of pounds at a time until you know the correct setting by the handling.
Usually, a track will have more turns one way than the other, so you usually don't wind up with the same pressure in both sides at the same end of the car.
For street, run 35 in both ends, both sides until the wear pattern becomes apparent, then adjust. If it wears in the middle, drop a few pounds and start again. If it wears on the edges, go up a few pounds and start again.
I run 35 all around on the street with the stock Goodyear F1's and I rotate every 300o miles. Wear is completely even at this time .... On my track tires, I run 2 pounds less in the rear than front, and two pounds less in the right rear than the left rear.
Your mileage may vary.
Softer tire, like Nitto 555's? Go with less. I'd try 32 both ends for the street and go to a track day to find out for the track.
Your handling on a track will tell you. Start with equal pressure front and rear.
If the car oversteers (loose, back end comes around), drop a couple of pounds in the rear on the outside that is loose. If the car understeers (tight, front won't turn fast enough), drop a couple of pounds on the outside front that is tight.
This assume youn start with enough pressure to not be underinflated to start with.
Once you know the offset for that track (you KNEW there was reason to practice and wear out all those tires, huh?), then try adjusting the overall pressure up or down a couple of pounds at a time until you know the correct setting by the handling.
Usually, a track will have more turns one way than the other, so you usually don't wind up with the same pressure in both sides at the same end of the car.
For street, run 35 in both ends, both sides until the wear pattern becomes apparent, then adjust. If it wears in the middle, drop a few pounds and start again. If it wears on the edges, go up a few pounds and start again.
I run 35 all around on the street with the stock Goodyear F1's and I rotate every 300o miles. Wear is completely even at this time .... On my track tires, I run 2 pounds less in the rear than front, and two pounds less in the right rear than the left rear.
Your mileage may vary.
