I am in a 88 Carrera and I am trying Toyo's RA1 for the 1st time. I got them shaved, and need to know about tire pressures. Can some one fill me in?

 

36 - 38 hot is a good place to start for most cars.

Gary

 

I have also found 38-40 hot works well to.

You should try 36-40 and see which one you like better.

 

i have had 4 sets of RA1, each set avgs about 1200 trackmiles and 4000 road miles. i run lots of camber -2 frt/-2.5 rear.

i like them 39-40 hot, all corners. never had prob with them.

this is on a 2004 996C2, stock other than suspension.

 

CAn anyone tell me the approximate lbs. of growth i.e. what should the cold be? 10 LBS lighter?

 

On my 2450 lbs spec car I start cold at 32.5 psi typically and come off track at 39 or so. 34 psi seems to be too high and 31 seems little low. 32.5 to 33 is about right for my car.

These are for 225/50 R15

PS cold means just before going on track.

 

So fo a heavier car, say 2900lbs, should I go higher or lower to start with?
I would guess higher, maybe 35lbs cold? I'm just doing autoX for now, so I usualy only see a 2lbs growth on a run.

 

I typically see a 7-8 lb pressure increase from cold-to-hot. This is on a stock 951S.

Jason, you'll probably want to shoot for closer to 38-40 psi hot. I shoot for 40-41 hot to keep the outside shoulder from rolling too much (stock suspension with aggressive alignment: -2.0 front. -2.5 rear). Heavier cars seem to need a little more pressure.