Can anyone give me a ballpark for cold pressures (f/r) for RA1s on a Subaru?
Thanks
Subaru Tire Pressure Advice Needed
the biggest factor is what kind of subaru you are running and what your suspension setup is. Other environmental factors will also affect you tires, but you can figure that out when youre at the track
In my wrx i ran 30/30 ish and would get things up to 40 hot. but I had a wagon so drifting had more to do with heating the tires.
In the Sti, I run staggered pressures all around and dial it in at the track. Ive had to run as low as 24 cold to keep the tires from going away after half dozen laps.
In my wrx i ran 30/30 ish and would get things up to 40 hot. but I had a wagon so drifting had more to do with heating the tires.
In the Sti, I run staggered pressures all around and dial it in at the track. Ive had to run as low as 24 cold to keep the tires from going away after half dozen laps.
Joe Lu
#24 ST1 STi
#24 ST1 STi
I have no experience with the RA-1's on a Subie, but have a decent amount of knowledge about RA-1's in general.
38-40 is where you want to end up "hot". Anything over 40 is not good. You should use a good-quality gauge to take and set pressures with. I would also recommend that you check your gauge against at least one other. Even a 1/2 pound difference can be a lot (ie: your gauge might say 40, but the actual pressure could be 40.5, etc).
I usually start the day at 32. By the end of the first run session (at NHIS), temps are usually up to the 38-39 mark. By the 2nd run session, they'll be up to 40ish. I may vary the starting PSI up or down by a tick or two, depending on track conditions and ambient temperatures. I usually do not add air between unless the pressures come in below expected pressure after the 2nd run session. For the most part, I'll bleed down as required. If track and weather conditions are the same on the 2nd day, I'll start the day with whatever pressures the tires are at. I'll continue to check pressures occasionally, but will not bleed or add air.
Toyo used to have a tech article on their website, but I could not find it.
In any event, much of this article is taken from what Toyo had published. The linked article goes to a Mitsu/Evo site, but the info carries over.
- Will
38-40 is where you want to end up "hot". Anything over 40 is not good. You should use a good-quality gauge to take and set pressures with. I would also recommend that you check your gauge against at least one other. Even a 1/2 pound difference can be a lot (ie: your gauge might say 40, but the actual pressure could be 40.5, etc).
I usually start the day at 32. By the end of the first run session (at NHIS), temps are usually up to the 38-39 mark. By the 2nd run session, they'll be up to 40ish. I may vary the starting PSI up or down by a tick or two, depending on track conditions and ambient temperatures. I usually do not add air between unless the pressures come in below expected pressure after the 2nd run session. For the most part, I'll bleed down as required. If track and weather conditions are the same on the 2nd day, I'll start the day with whatever pressures the tires are at. I'll continue to check pressures occasionally, but will not bleed or add air.
Toyo used to have a tech article on their website, but I could not find it.
In any event, much of this article is taken from what Toyo had published. The linked article goes to a Mitsu/Evo site, but the info carries over.
- Will
96 Miata #72 SC
PRA 4
PRA 4
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