hey guys, im going to the track again tomorrow and im gonna swap out my 20's in the rear, and put on the 18's w/ F1's on them.... what is a good PSI to run them at for traction and drivibility???

 

I got the best results at 28 - 30 psi

 

I ran 24psi.

--Joe

 

Last year at Milan I got my best (new tires) at 26psi. I went lower but it seemed to spin easier and loose 60' times.

WOT

 

26~27 for mine

 

all these PSI #'s are when they are cold right? i dont want to put them at 26-28PSI and have them expand...

 

I leave mine alone - run them at street pressure. I was able to cut 1.85 60' all day long at Norwalk towards the end of last year... on the F1's (there were a few from here that witnessed this). All they need is cleaned off a bit, and roll into the throttle... works very well.

 

I ran mine at 22-25 lbs
and got 1.8 - 1.9 every launch last season, except one 2.0

 

Track prep has a lot to do with the different pressures you're seeing people post.

I've run them typically at 28 PSI and I've done horribly (2.1 best) at one track and a best of 1.84 at another.

I would start high and reduce from there depending on the resulting 60'.

Good luck!

Dan

 

I ran my F-1's at 20lbs and was able to cut a 1.86 60' on a good track

 

When I used to run F1's I ran them at 27psi