pdy wrote:Dan: I have a good deal of experience with the Hoosier A-6. I settled on 38 psi hot, front and rear for Snickers, and 36-37 for Butch.
Important info on my cars; Snickers is 2750 lbs with me, no LSD, Butch is 2500 with me, has LSD. Both have -2.5° to -3.0° camber F/R.
The A-6 does like negative camber, and are sensitive to rim width. Note the lower psi for the lighter car.
I don't think they make a 225/45-16. There's a 225/45-15 (wants a 8.5" rim), and 245/45-16 (9" rim ideally). ± ½ inch on the rim widths is okay.
The A-6 works best in the first couple of laps (ideal for Autocross or Timed Runs), then gets slower. They work best with "Tidy" (smooth) driving.
They work best with "Tidy" (smooth) driving.
Dan Chambers wrote:
Thanks, Paul. I'm not sure the side-wall-percent number (I'll have to look), but I'm going to have to "use what I got" for wheels. The tires were used for 2 heat cycles, so they're a bit "broken in."
I'll play with the tire pressures using your recommendations as bench-marks. I'll also monitor heat at the end of the sessions if you think that will help.:
pdy wrote:
Unlike the R-6, Hoosier A-6 tires are "broken in" after about 50 feet.
The pressures I listed are what I adjust to right AFTER a session.
For autocross, each lap adds a couple of psi, so ideally you would drop them down to the target psi immediately after each run (that's what your pit/grid crew is for!).
Okay techies, whadaya got?
John Straub wrote:Dan,
For the slicks: 19-20 cold. Maybe 21 with that wt. No wait I think maybe 40-45 cool.
John
Steve Grosekemper wrote: For a 911 like Dan's car I think it's more like 45 on the RF and LR and 21 in the other two tires.
Unless he runs with a spare tire and then he must run aother 5 psi in the left front tire.
Dan, All season tires will heat up the quickest in an AX; you light want to try Brigdestone Blizztaks snow tires.
Always glad to help....
...Dan, All season tires will heat up the quickest in an AX; you light want to try Brigdestone Blizztaks snow tires.
Always glad to help....
Yeah, I'm feeling a whole lotta love in this 'hood. Those I-I competitors ... they're all about the lovin'!Dan-
Ain't it wonderful the way folks in this club will just give, and give, and give, until there ain't nuthin' left?
I'm sure you're feelin' all the luv by now...
TT
Why sure! Tell ya what Mr. Generous: I'll give you the keys to the Black Pearl for one run session and you give me the keys to the GULF stream-machine. Let's see who has more cord showing at the end of the day. Oh yeah, I almost forgot: Got Rev Limiter?I can help you Dan...I'll just need to drive your car a lap or 2...
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