For those of you running these tires on the GT350 in general, and the GT350R in particular, how many heat cycles do you average before they need replacing? What wheels are are you using?
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Great info for all, but one thing that we should make sure folks add when discussing hot/cold temps , is to designate whether they are discussing on a GT, Boss 302 , or GT350. Solid rear axle or Independent, range of camber in the front between a Boss and a GT 350, tire size ( 18 or 19 ) can all affect the temp range and they will likely be different between these cars simply due to suspension dynamics, imho.
Nuff said, now commence contributing , ha.......
As a Phoenix customer, I was invited to a track day a couple of weeks ago at NJMP with Joe Aquilante (in his Z06) and one of his young guns in his T-3 Mustang as he prepped for the run-offs. It was my first real test of my car since Phoenix did the clutch, rollbar, set the ride height and general settings. They also modified the shock tower so I can get up to -5.0 camber but set it at -3.5. I was running Pirelli 305-680-18 DH take-offs set at 26 psi cold per Joe's recommendation. I went out and got lapped by everyone on track......all race cars and a GT350 but still! I could not get the front end to turn. There is a section of right-left-right transition that just killed me.....couldn't point the car and had to lift until I could get the front to track. I tried to check tire temps after the first session but my battery died. Pressures were around 31. But I noticed the first front temps I got before it died showed and inner reading that was 70-80 degrees higher than the outer edge and it didn't look like I even used the outer 3-4 inches of the tire. Too much camber? Too much pressure? I'm running there again this weekend and will drop camber down to -3.0 (although Joe recommended at least -3.5 if not more) to see if wear and temps are more even. The front Koni's (Cortex single adj) were set about 1/4 from full soft. 32mm front Strano bar on middle hole. Should I increase compression? I have not played with the JRi's in the rear so I do not know what they were set at but I have an 18mm rear bar. Rear traction was good as expected but it's killing my front grip. Any suggestions?
What size are you having a hard time finding?Having a hard time finding any of these at the moment
Really any Pirelli DH 19’s, dont want 710’s but can’t find 305/645, 305/660, or 305/690What size are you having a hard time finding?
Assuming you checked with usedracingtires.com or John Berget in Wisconsin?
Somewhat typical for tires after the end of the Season for various sports car Series. May need to run something else in the meantime and if you are looking for pretty decent life and flexibility , the Michelin Pilot Sport Cup 2s are a good alternative . Sure they are more expensive , but they are less than some other alternatives. If you want even more aggressive grip , go for a Hoosier R 7.
Otherwise , used Pirellis and likely Michelins will pop up next year as early as late February or March ( Michelin could be in greater supply as they will be the new tire of choice for what was the Continental Tire Series ).
Sent you a PMReally any Pirelli DH 19’s, dont want 710’s but can’t find 305/645, 305/660, or 305/690
Should be more choices next year and if you are running road courses more than Autocrosses , would suggest the PSC2s over the Bridgestones as they will be faster ---- and have more life than an R7 , yet not get greasy as fast as the Bridgestones.
In my opinion this would would be to big, but yeah would be open to hear if anyone has run it315 705 is all I can find anywhere...sounds too big? Can anyone confirm?
Instruct at two tracks and with NASA , and a lot of guys around here run RE71s as they autocross and the Solo Nationals are run about 60 miles from me down in Lincoln , Nebraska. The Bridgestones are the " King of the Autocross, " with only the BFG Rival S very close in my estimation, but I can categorically state that the Cup 2s are faster on a road course, though, as you mentioned they may not last as long as the RE71s. I guess I am not sure what you are looking for , more speed or just longevity? I do know from a lot of students and friends that the only real downside with the RE71s is they get greasy , pretty fast , for accomplished drivers.
Just throwing out alternatives and the Pirellis have been great , because if you trash one, not much cost to get another, but maybe next year with the Michelin slicks ( which are even faster than Pirellis ) being on more cars , there will be another used racing tire alternative?
[email protected] You can always contact me here , as have access more often than the Forum.
Thanks for the note.