I have never run these tires before - can someone give me an idea of what to use for baseline tire pressures on a '99?
I will be using them in a 3hr enduro, so getting the pressure in the ballpark is kind of important as we only have 1 pitstop and dont really want to take the time to check tire pressures.
-------------------- Ryan Groth #52 SM NASA Midwest Series Director
Region: Great Lakes/Detroit
Car #: 51
Year : 1994 Miata Posts: 401
Status: Offline
posted
I run lower pressures than I did on Toyos. I start the Hoosier fronts at 30 lbs and rears at 28 lbs. Hot pressures are around 38 lbs. I do know racers who start Hoosiers as low as 26 and as high as 32.
Region: MidDiv / SOWDIV
Car #: #39
Year : 99 LS1 Miata Posts: 1756
Status: Offline
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We use to run the ITA miata at 28 cold. Big Swerve is right, you are looking for around 36 hot.
-------------------- Mac Spikes IPRESS Racing MER East Street Auto SAFERACER Hoosier Carbotech MotorSport Ranch Cresson, Texas "To hell with you Gen. Sheridan...I 'll take Texas!"
38-40 is where you want to be in most cases. More air will be faster, but will also make car a little more "free". I've run a 93 ITB Golf for 4-5 years and we are in the 40-42 psi hot after a 3 hr stint. Lower pressure may feel comfortable, but will also prematurely wear the tire faster. It may take a little time to get use to the higher pressure but it will reduce rolling resistance and you will be smoother in the long run.
Region: Great Lakes/Detroit
Car #: 51
Year : 1994 Miata Posts: 401
Status: Offline
posted
See... clear as mud. The cold ranges seem to be between 26 and 32. Hot ranges 34 to 40. Take your pick in the middle somewhere for a starting point and test from there.
The Hoosiers are FAR more tolerant of a wide pressure/temperature range than the Toyos. I've run anywhere from 36 hot to 42 hot and all that really changes on the tires is the balance. I would typically shoot for 38 hot to start and go from there. You definitely don't need to roast them to make them work though.
-------------------- Colin MacLean Flyin' MacLean Motorsports
Region: MidDiv
Car #: 13
Year : 92 Posts: 2873
Status: Offline
posted
We have run the Hoosier SMs quite a bit on our 1.6. We like the lower end of the pressure range. I find the lower the pressure the more compliant the car is. I like 26-27 cold and figure it will gain about 6psi from there. In my experience this tire doesn't need the high pressures the RA1 does. The lower pressure will cost you in straight line speed but on technical tracks it more than makes up for it in the corners.
YMMV...
-------------------- ---------------- Z Brothers Racing / East Street Auto
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