Autocross Tire Pressure

JD_GTPP2 · Jun 23, 2018

I'm sorry if this seems like a noobie question, but I am coming from autocrossing a Focus ST to the Mustang GT PP2 and do not have a clue what the tire pressure ought to be.

Any of you experienced autocrossers have suggestions? For what it's worth, I am running Michelin PS4s in 305/30/19 at all 4 corners.

thanks,
JD

BmacIL · Jun 23, 2018

Well, if you're stock with no additional front camber, you'll want to run the fronts at around 34-35 hot to stop the sidewall from folding over. If you add camber via bolts/slots/plates to -2 or more, you can reduce that to low 30s hot. Rear I prefer around 30 hot. Do you have PS4S or the Cup 2s that came with the car? If PS4S, add 1-2 psi to that front pressure.

JD_GTPP2 · Jun 23, 2018

BmacIL said:
Well, if you're stock with no additional front camber, you'll want to run the fronts at around 34-35 hot to stop the sidewall from folding over. If you add camber via bolts/slots/plates to -2 or more, you can reduce that to low 30s hot. Rear I prefer around 30 hot. Do you have PS4S or the Cup 2s that came with the car? If PS4S, add 1-2 psi to that front pressure.

Thanks much! I have the PS4S all around. The SC2s are sitting the garage waiting for next spring and track days.

Autocross Tire Pressure

JD_GTPP2

Well-Known Member

BmacIL

Enginerd

JD_GTPP2

Well-Known Member