991 Turbo on
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Well, then 19's (possibly specific wheels only) fit any 991. I'm not aware that there are any bigger brakes than the PCCBs.
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You need to run when air pressure is very high. Since you are near sea level even at mid-70's temps you can get close to zero DA under some circumstances.
The guys that got to run RedList/Famoso were lucky as we had record low DA (negative 1,000 feet) from very high air pressure and cold temps, plus a tailwind up to 15mph. My buddy with an intake, catback and e85 fuel system + tune on his otherwise bone stock GTR went 138.6 mph.
That same GTR could only trap 132 at Fontana in August at nearly 1 mile high DA...although that track also runs uphill with a headwind. I went 10.29 at 133.4 that day with my 997.2.
DA can make a big difference.
The guys that got to run RedList/Famoso were lucky as we had record low DA (negative 1,000 feet) from very high air pressure and cold temps, plus a tailwind up to 15mph. My buddy with an intake, catback and e85 fuel system + tune on his otherwise bone stock GTR went 138.6 mph.
That same GTR could only trap 132 at Fontana in August at nearly 1 mile high DA...although that track also runs uphill with a headwind. I went 10.29 at 133.4 that day with my 997.2.
DA can make a big difference.
But I know we can get better ET if we try other tires, hopefully better traps too... In the case of our 1/2 mile thr airport is right in front of the beach and have better DA
But it's not the brakes you need to worry about clearing, the wheels clear those with room to spare. It's the lower control arm....it's extremely close. I would not recommend regular driving on those wheels but for a few passes down the 1/4, they'll work.
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Originally Posted by 918 Spyder
Tom, Thanks for sharing the info on the MT. Let me know how you do with 19's. I'll share my experience once my car returns from CA and we give Rob a chance to dyno and tune the car. The first event that we might be able to run if all goes as planned is the wannagofast event in VA. It's a nice venue but the altitude just kills the speed. Next up will be Ga half mile and the same holds true as far as altitude. Maybe I can squeeze in a quarter mile between the two races.
Jeff
Jeff
You going to Tx2K?
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Originally Posted by Tom@Champion
We used oem 997.2 center lock wheels.
But it's not the brakes you need to worry about clearing, the wheels clear those with room to spare. It's the lower control arm....it's extremely close. I would not recommend regular driving on those wheels but for a few passes down the 1/4, they'll work.
But it's not the brakes you need to worry about clearing, the wheels clear those with room to spare. It's the lower control arm....it's extremely close. I would not recommend regular driving on those wheels but for a few passes down the 1/4, they'll work.
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Why does it mean you'll stick with 20's? You've had a lot of launch problems... this is a big jump forwards (literally).
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