rob76turbo

I am running R888

Cold psi (at start of session)
F. 27
R. 30

Hot psi (at end of session)
F. 32-33
R. 37

Outside temp: 103 degrees (very hot)

Car felt good / balanced thoughout session

Jason Judd

I start at 28~30 psi, and try to get 35~37 psi hot.

I'm running Hoosier R6's by the way.

rob76turbo

Jason,

Is your goal to have F/R at the same psi? Or staggered F/R with F lower and R at 37?

Jason Judd

Rob,

I'm trying to keep my pressures the same all the way around.

If I had a pyro, that would really be the gauge I'd be using...but I don't, and the time factor is even more critical with temp's than pressures...and I don't always have a track-rat at the ready, either!

So, I'll stick with tire pressure as the barometer...Anyway, I'm not a podium contender at this point, so it's not that critical anyway!

mikew968

I try for fairly even f/r pressures although you can you pressure to finetune the handling. If pressures are like the RA-1 I ran those at more like 38-40 psi hot.

MIke

93 FireHawk 968

I run Hoosier R6's and aim for 39psi all around when hot. Usually start around 32psi cold and have full temps after 1st run of the day. I bleed down when the ambient temps are hot and tire temp's exceed the targeted 39psi.

I have used a pyrometer but use tire pressures far more frequently.

Lemming

35-36 hot all around on 245/15's (R6). Pyrometer readings from 185 to 195 on pit lane.

I run the 888's the same but on 235/15's.

32-33 hot for your front tires seems too low, unless your car is sub 2000lbs?