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Old 05-05-2000, 11:46 AM   #1
Impy
Scooby Newbie
 
Member#: 489
Join Date: Nov 1999
Location: Toronto, ON, Canada
Post yoko A032R

Anyone know what are good pressures to run with these? what should i start with??
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Old 05-05-2000, 03:18 PM   #2
Dobes
Scooby Specialist
 
Member#: 164
Join Date: Aug 1999
Location: Philly suburbs
Vehicle:
1997 Legacy GT-T

Post

I've only autoxed a few times on these tires since I got them so I'm no expert. The last autox I was at the ambient temp was around 65° and I was running about 44F/35R. Tread temps were very good and the tires didn't flex too far.

The tire pressures will really depend on what type of suspension you are running, track temperature, sway bars, etc. My advise is to start around 42F/38R and mark the edge of you tire tread with some shoe polish or a tire crayon. Monitor them after each run to see how far the tire is rolling over. Ask an experienced driver to show you where the mark should get rubbed off to. That will be a good guideline as to whether your tires are over or under inflated too much.

To narrow it down you will have to just spend some time feeling the difference between pressures and adjust accordingly.

JD

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Old 05-07-2000, 05:43 PM   #3
Molez93
Scooby Newbie
 
Member#: 585
Join Date: Dec 1999
Location: Rochester, NY
Vehicle:
02 WRX
WR Blue

Post

Hey Impy,

Dobes' reply sounds pretty good, although if it's autocross I *think* the veteran opinion is to start with 45/40 F/R and go from there. (No offense Dobes- ) I'm simply basing that thought on those of us who've been racing RS's for a couple years in Solo2. Of course, YMMV. LOL

Road race or street use would probably need several (if not many) pounds less.
-Scott
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Old 05-08-2000, 08:30 AM   #4
Dobes
Scooby Specialist
 
Member#: 164
Join Date: Aug 1999
Location: Philly suburbs
Vehicle:
1997 Legacy GT-T

Post

Molez93:

No offense taken. The Yoko's are my second set of race tires. I've run a total of about 35 autoxes (most on Yoko A008RS's, some on Pirelli P7000's and the rest on the A032R's) in addition to a Car Guys driving school. Personally, I've found that pressures (at least for my old tires) of about 45F/35R work pretty well. Others who race RS's in my region use approximately the same pressures. None of our cars are set up the same so the optimum pressures will be different.

Do you keep a log book of how the tire pressures feel? I am in the terrible habit of arriving at an event and putting in a pressure that happens to 'feels' right at that time. After a run or two, I adjust them on the fly.

40psi in the rear seems a bit high. Do you have your car set up to oversteer or are you trying to achieve a more nuetral feel? Personally, I like a little oversteer in my car for decreasing radius corners and very tight hairpins. With the setup I am running, oversteer is nearly impossible to achieve except in the rain. Tire pressures will help, but only to a certain extent. My car tends to push at the limit, even when I abrubtly lift off the throttle. At higher speeds it's a different story, it's just too bad that autoxes don't have a lot of 50 mph corners. Believe me, I have tried all sorts of pressures - all the way to around 48F/32R.

Regards,
JD
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Old 05-10-2000, 07:51 PM   #5
Gary (gg)
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Member#: 179
Join Date: Aug 1999
Location: Wichita, KS
Vehicle:
98 2.5RS
Rally Blue

Post

42/38
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