NASA TT Class for '09 Carrera
#16
Burning Brakes
Strange the '08 & '09 models are not listed. Greg Greenbaum doesn't like Porsche's so that may be the reason. As a former Nasa TT/PT Director I would guess you're looking at TTS which requires a dyno.
That said I assume your heading to Infinion this weekend so go talk to John Lindsey and tell him Graber said to let you run this weekend.
That said I assume your heading to Infinion this weekend so go talk to John Lindsey and tell him Graber said to let you run this weekend.
#17
Wordsmith
Rennlist Member
Rennlist Member
Thread Starter
Strange the '08 & '09 models are not listed. Greg Greenbaum doesn't like Porsche's so that may be the reason. As a former Nasa TT/PT Director I would guess you're looking at TTS which requires a dyno.
That said I assume your heading to Infinion this weekend so go talk to John Lindsey and tell him Graber said to let you run this weekend.
That said I assume your heading to Infinion this weekend so go talk to John Lindsey and tell him Graber said to let you run this weekend.
Here's my (rookie) "math" :
2009 Porsche 911 Carrera 4S Cabrio w/PDK = 3516 lbs
3516 / 385 hp = 9.13
AWD = -0.5
weight adjust 3700 lb (with driver) = +0.55
=9.18 (TTA = 8.70:1)
Points adjustment:
RA1's = +5
+20mm (305's) = +4 (factory stock, but wider than the allowed 295's)
3rd muffler delete = +2 (not on the car yet, but thinking about tinkering)
GT2 rear sway = +2 (ditto ... not on the car yet, but something to play with)
total = +13
WIth 6 points to stay under 20 total points adjustment, the car can weigh as little as 3620 lb with driver.
At 9.18:1 and 13 points, I believe my car is in TTA.
Advice?
#18
Intermediate
Join Date: Oct 2005
Location: Fort Myers, FL
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I'm think the Hp to weight ratio is based on rwhp. I'm assuming 385 is flywheel on the new cars. I certainly don't know that much about base classing cars for TT, but I just can't see the new Carrera S ending up in anything higher than TTA.
My 2 cents,
Hoosier R6s are the best 10 points you can take. Assuming there are three or more people in TTA, the contingency can make them cost effective.
My 2 cents,
Hoosier R6s are the best 10 points you can take. Assuming there are three or more people in TTA, the contingency can make them cost effective.
#19
Wordsmith
Rennlist Member
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Thread Starter
I'm think the Hp to weight ratio is based on rwhp. I'm assuming 385 is flywheel on the new cars. I certainly don't know that much about base classing cars for TT, but I just can't see the new Carrera S ending up in anything higher than TTA.
My 2 cents,
Hoosier R6s are the best 10 points you can take. Assuming there are three or more people in TTA, the contingency can make them cost effective.
My 2 cents,
Hoosier R6s are the best 10 points you can take. Assuming there are three or more people in TTA, the contingency can make them cost effective.
I guess I could remove a nominal 10% driveline loss or say 35hp making it 350 rwhp.
2009 Porsche 911 Carrera 4S Cabrio w/PDK = 3516 lbs
3516 / 350 hp = 10.05
AWD = -0.5
weight adjust 3700 lb (with driver) = +0.55
=10.1 (TTA = 8.70:1)
Points adjustment:
RA1's = +5
+20mm (305's) = +4
3rd muffler delete = +2
GT2 rear sway = +2
total = +13
#20
Rennlist Member
rwhp (to the ground) would make sense. That would change things and perhaps it could be tweaked to get into TTB, but I'd rather compare times with TTA where I think I'd have to work pretty hard.
I guess I could remove a nominal 10% driveline loss or say 35hp making it 350 rwhp.
2009 Porsche 911 Carrera 4S Cabrio w/PDK = 3516 lbs
3516 / 350 hp = 10.05
AWD = -0.5
weight adjust 3700 lb (with driver) = +0.55
=10.1 (TTA = 8.70:1)
Points adjustment:
RA1's = +5
+20mm (305's) = +4
3rd muffler delete = +2
GT2 rear sway = +2
total = +13
I guess I could remove a nominal 10% driveline loss or say 35hp making it 350 rwhp.
2009 Porsche 911 Carrera 4S Cabrio w/PDK = 3516 lbs
3516 / 350 hp = 10.05
AWD = -0.5
weight adjust 3700 lb (with driver) = +0.55
=10.1 (TTA = 8.70:1)
Points adjustment:
RA1's = +5
+20mm (305's) = +4
3rd muffler delete = +2
GT2 rear sway = +2
total = +13
By the way deleting the muffler is a lot of points for minimal weight loss.
Peter
#21
haha.
Actually a fully built GTS3 E36 wont be in PTB. I have to remove some stuff to make it legal
#22
Track Day
#23