NASA Tire Rule Change
#22
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But for the sake of it, assuming a dyno reclass to TTC of 265whp/3190lbs (no points for engine/hp mods required), wouldn't any of these configs be reasonably competitive at a NASA event (or at least as competitive as they are in T2/T3 vs Mustang/Evo/[insert whatever overdog SCCA decides to include in future here]):
TTC (T2 350Z w/o Aero, yes the aero is throw away but must take points)
+13 Hoosier A6
+ 7 Tire width (285mm)
+10 Shocks - Triple Adjustable w/ Remote Reservoir
+ 2 Springs
+ 2 Calipers
+ 1 Modify Diff
+ 2 Sways
Total: +37 up one class to TTB
TTC (T2 350Z w/ Aero)
+10 Hoosier R6, BFG R1, Goodyear Eagle RS, Hankook Z214 (C71, C70, C51, C50), Hoosier R6, Kumho V710
+ 7 Tire width (285mm)
+10 Triple Adjustable w/ Remote Reservoir
+ 2 Springs
+ 2 Calipers
+ 1 Modify/Upgrade Diff
+ 4 Rear Wing
+ 3 Front Splitter
Total: +39 up one class to TTB
TTC (T2 350Z w/o Aero)
+13 Hoosier A6
+ 4 Tire width (275mm)
+10 Shocks - Triple Adjustable w/ Remote Reservoir
+ 2 Springs
+ 2 Calipers
+ 1 Modify Diff
+ 4 Rear Wing
+ 3 Front Splitter
Total: +39 up one class to TTB
Last edited by l30thelion; 11-28-2011 at 08:26 PM.
#23
I feel ya. If I were to try to fit into any of the "T" classes, I would be screwed, but if you came over, it would be a lot easier.
All of those options would work just so long you were not taking any points for weight. Here are the base classes and weights for the different models of Z's.
Nissan 350Z (287hp)('03-'05)(enth.ok) TTC 3188lbs(This is where my car lands)
Nissan 350Z (300hp)('06)(enth. ok) TTC 3339lbs
Nissan 350Z (306hp)('07-'08)(enth. ok) TTC* 3320lbs
Nissan 350Z Nismo ('07-'08) TTB 3350lbs
Nissan 350Z Track ('05-'06),35ann, GT TTC* 3370lbs
Nissan 350Z Track Model ('03-'04) TTC* 3225lbs
What is your comp weight and max power/weight?
All of those options would work just so long you were not taking any points for weight. Here are the base classes and weights for the different models of Z's.
Nissan 350Z (287hp)('03-'05)(enth.ok) TTC 3188lbs(This is where my car lands)
Nissan 350Z (300hp)('06)(enth. ok) TTC 3339lbs
Nissan 350Z (306hp)('07-'08)(enth. ok) TTC* 3320lbs
Nissan 350Z Nismo ('07-'08) TTB 3350lbs
Nissan 350Z Track ('05-'06),35ann, GT TTC* 3370lbs
Nissan 350Z Track Model ('03-'04) TTC* 3225lbs
What is your comp weight and max power/weight?
#24
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I feel ya. If I were to try to fit into any of the "T" classes, I would be screwed, but if you came over, it would be a lot easier.
All of those options would work just so long you were not taking any points for weight. Here are the base classes and weights for the different models of Z's.
Nissan 350Z (287hp)('03-'05)(enth.ok) TTC 3188lbs(This is where my car lands)
Nissan 350Z (300hp)('06)(enth. ok) TTC 3339lbs
Nissan 350Z (306hp)('07-'08)(enth. ok) TTC* 3320lbs
Nissan 350Z Nismo ('07-'08) TTB 3350lbs
Nissan 350Z Track ('05-'06),35ann, GT TTC* 3370lbs
Nissan 350Z Track Model ('03-'04) TTC* 3225lbs
What is your comp weight and max power/weight?
All of those options would work just so long you were not taking any points for weight. Here are the base classes and weights for the different models of Z's.
Nissan 350Z (287hp)('03-'05)(enth.ok) TTC 3188lbs(This is where my car lands)
Nissan 350Z (300hp)('06)(enth. ok) TTC 3339lbs
Nissan 350Z (306hp)('07-'08)(enth. ok) TTC* 3320lbs
Nissan 350Z Nismo ('07-'08) TTB 3350lbs
Nissan 350Z Track ('05-'06),35ann, GT TTC* 3370lbs
Nissan 350Z Track Model ('03-'04) TTC* 3225lbs
What is your comp weight and max power/weight?
My Z has no engine/hp upgrades, I run various configs:
TTD dyno reclass @ 3370lbs/235hp:
+13 A6
- 4 225mm Tire
+ 2 Springs
+ 3 Shocks (DA Koni)
+ 2 Sways
+ 2 Calipers
+ 1 Upgrade Diff
Total: +19 TTD
I think the following would work very well for TTD. Min Wt/Hp ratio for TTD is 14.00, so w/ this config it would be 3195/235 = 13.59 + .8 (for tire < 255mm) - .05 for weight = 14.34....pretty close to min.
TTD* dyno reclass @ 3195lbs/235hp:
+ 7 for the (*)
+10 R6
- 4 225mm Tire
+ 2 Springs
+ 3 Shocks (DA Koni)
+ 1 Upgrade Diff
Total: +19 TTD
Regarding the tire rule change, I sold my 17x10 wheels and was hoping to eventually buy 18x10s to take advantage of the 255 tire. I wish I had kept my 17x10s, it was a joy running 275 R6s on em. Right now I'm running 225 R6/A6 on 17x8s and its not too bad. I'm hoping I can make it out to Nats in 2012 (though its a long shot). I would like to run TTD or TTC, I think the Z has a chance in one of those classes, what do you think?
Last edited by l30thelion; 11-29-2011 at 05:36 AM.
#25
I never thought of doing TTD. That would be an excellent setup for that class because you would be at the top of the power/weight big time with that adjustment. TTC, you would have a hell of time in because it is dominated by S2000's. They are much lighter and are at the top of the power/weight. There was an S2000 in TTC at Nats that ran faster than half of the TTB class. He is local to my region and he is something else.
#27
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I never thought of doing TTD. That would be an excellent setup for that class because you would be at the top of the power/weight big time with that adjustment. TTC, you would have a hell of time in because it is dominated by S2000's. They are much lighter and are at the top of the power/weight. There was an S2000 in TTC at Nats that ran faster than half of the TTB class. He is local to my region and he is something else.
The width is wide for a 225, but not quite the size of most of the summer tire version of 255's. The two M3's I mentioned above run on 225's (last I saw), and probably weigh more than what a TTB 350 can or could weigh. You just have to make the first few laps count on A's at that size I would think. The load on the tire at that size is probably at or beyond what hoosier intended as well.
#28
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There are two E36's (Scott Blair and DJ Fitzpatrick) that really really move in TTC. Both hover around the 2:10 range at VIR Full, which is FAST, for relatively lightly modded E36 M3 on hoos.
The width is wide for a 225, but not quite the size of most of the summer tire version of 255's. The two M3's I mentioned above run on 225's (last I saw), and probably weigh more than what a TTB 350 can or could weigh. You just have to make the first few laps count on A's at that size I would think. The load on the tire at that size is probably at or beyond what hoosier intended as well.
The width is wide for a 225, but not quite the size of most of the summer tire version of 255's. The two M3's I mentioned above run on 225's (last I saw), and probably weigh more than what a TTB 350 can or could weigh. You just have to make the first few laps count on A's at that size I would think. The load on the tire at that size is probably at or beyond what hoosier intended as well.
I sound like a broken record: The NASA TT/PT classification system is great, the flexibility in the system allows for "creative" configs, its up to you to find what strategy works best and that is part of the fun. It also allows for some interesting fields of cars, for example TTD that weekend was made up of 2 supercharged 93 miatas, a 97 mustang cobra, a 350Z, a 99 miata, 94 bmw 325is, and a 98 bmw 328i...now that is fun!
#29
There are two E36's (Scott Blair and DJ Fitzpatrick) that really really move in TTC. Both hover around the 2:10 range at VIR Full, which is FAST, for relatively lightly modded E36 M3 on hoos.
The width is wide for a 225, but not quite the size of most of the summer tire version of 255's. The two M3's I mentioned above run on 225's (last I saw), and probably weigh more than what a TTB 350 can or could weigh. You just have to make the first few laps count on A's at that size I would think. The load on the tire at that size is probably at or beyond what hoosier intended as well.
The width is wide for a 225, but not quite the size of most of the summer tire version of 255's. The two M3's I mentioned above run on 225's (last I saw), and probably weigh more than what a TTB 350 can or could weigh. You just have to make the first few laps count on A's at that size I would think. The load on the tire at that size is probably at or beyond what hoosier intended as well.
#35
Have any of you guys seen the 2012 TT/PT rules yet? Last year they had them released by now. I am really wanting to know soon, so I can proceed with some work on the car. I know some of you guys in the south are probably needing them more than me because you guys actually have events in Jan and Feb.
#39
Check out this 2013 rule change thread that's already starting. It's going to be 100 pages by summer.
http://www.nasaforums.com/viewtopic.php?f=2&t=52825
http://www.nasaforums.com/viewtopic.php?f=2&t=52825
#40
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Check out this 2013 rule change thread that's already starting. It's going to be 100 pages by summer.
http://www.nasaforums.com/viewtopic.php?f=2&t=52825
http://www.nasaforums.com/viewtopic.php?f=2&t=52825