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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > 4/14 HPDE at Thunderhill, might rain, tips?



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      04-09-2012, 01:57 AM   #1
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4/14 HPDE at Thunderhill, might rain, tips?

Any tips from seasoned veterans? This will be my second time. First time was at Infineon last month. Ran 32 psi (cold) on the tires all around and Bilstein coilovers were 8/9F and 9/9R. They were pretty stiff.
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      04-09-2012, 03:39 PM   #2
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Set the rebound to soft. Put 2-4 PSi more air in the tire. Stay off of the painted stuff. Don't run slicks (treaded R-Comps are okay). Take most corners 1 gear higher than you normally would in the dry. Keep car 1/3-1/2 car width from the apex and exit (reason being, more oil and tire laid down right on top of the apex and exit and when initially wet, they're more slippery unless it's been driven over a few times).

Other than that...Stay sunny side up.
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      04-10-2012, 03:33 PM   #3
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What Hack said, STAY OFF the painted surface as it'll be slick as ice, last thing you want to do is drive over it and end up going into a wall. End of day, as obvious as it sounds, you want to avoid wherever the water collects so try to figure out which areas have good drainage and stay there. Being smooth is even MORE important during the rain!
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      04-10-2012, 11:44 PM   #4
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Thanks guys. It looks like it'll be clear. Thunderhill is gonna be fun!
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