Autocar 997 Mk2 GT3 RS first drive

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02-12-2010, 08:51 AM

#16

911dev

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Quote:

Originally Posted by rsman

I think the shorter gearing just effectively compensates for the inherent taller gearing created by the 325 rear tires vs 305 on the regular GT3.

That's a joke right?

What is the difference in circumference?

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02-12-2010, 12:03 PM

#17

rsman

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The difference on Michilin pilot sport cups is .4 of an inch. Tire is also heavier. Go to Tire Rack web site to get all the spec differences

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02-12-2010, 12:57 PM

#18

TRAKCAR

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At Sebring there are 2 straights where the same GT3 can stay in 4th instead of having to go to 5 and 3rd instead of having to go to 4th becuase of the tires circumference.

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02-13-2010, 12:40 AM

#19

Z06

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Quote:

Originally Posted by NJ-GT

The article is pretty interesting.

How come a 2010 GT3 RS with the ultra wide wing generates just 170Kg (375 lbs) of downforce at 186mph? It is twice as much as the 2010 GT3, but...

The Viper ACR (ok it is too much) generates 1,000 lbs at 150 mph. Even the 2005 F430 (no wing) generates 616 lbs at 186mph.

0.1 secs quicker to 100 mph than the 2010 GT3? despite the extra 15Hp and the shorter gears?

F430, The rear diffuser creates more downforce with less resistance than a wing. Plus the Viper has both.
Makes you think how important the air under the car is!