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This past weekend I was at a cool & wet event on a gritty/dirty surface - low traction all around. I ran 29/29 cold (went to about 31/32 warm-ish) on the RE71R with no additional rollover.
Well, I took 1st place and I have two season championships so I assume I know how to drive.
My friend took a pair of RE71s and put them next to some ZII Star Specs - the sidewall difference was insane - the RE71 sidewalls are like rocks - they're essentially a Hoosier with tread carved into them (and they wear like a Hoosier).
Basically, if you're running anything other than the RE71r at this point, you don't like winning.
I'm sure the michelin PSS - a true street tire - would have a much more cushy sidewall than a real autocross tire like the re71r. I just didn't think it would be a 10+psi difference.
This past weekend, I tried cretinx's Jesus setup 34F/30R. On a very grippy surface I was getting a tad more rollover than I was looking for, especially in the rear tires. 35/33 and 34/32 were working well, and I was really happy with the overall balance.
I'm at 61 runs on my tires and center tread depth is at 5/32F and 4/32R. Starting to see some feathering on the center strip and block edges. I don't have any good photos of full tread but do have some of the outer edges taken before the pressure bump.
Understood. You're in a 996, correct? I mostly used that as a starting point for running pressure lower in R than F. Previously I typically ran about 2lb higher in R. I eventually found good balance so it was a good exercise on a test and tune day where I had two different styles of course to practice on.
Adding some data here in support of the RE-71R dominance.
2015 Cayman GTS, PDK, PTV, X73 sport suspension
Front: 245/40R18, 18x8 wheels
Rear: 275/35R19, 19x9.5 wheels
Target hot pressure: 36 psi all around
Got my first competition experience on RE-71R tires on Saturday. The tires had about 70 miles of road use before the autoX -- basically just a pair of shakedown drives.
My results with and without the RE-71R tires running with the same club (PCA San Diego region)...
April event: 13/95 raw time, TTOD +3.96 seconds, 10th in indexed time (2nd autoX weekend on stock Goodyears)
May event: 22/92 raw time, TTOD +4.12 seconds, 20th in indexed time (4th autoX weekend on stock Goodyears)
June event: 2/114 raw time, TTOD +0.19 seconds, 2nd in indexed time (1st time on RE-71R)
The April and June events had TTOD set by the same driver, same car -- so relative to him, I gained 3.77 seconds with the RE-71Rs. That's roughly in line with the gain I've seen in the past switching from street tires to Hoosiers. So yeah, I can see how people make that comparison.
06-15-2015, 02:15 PM
