NASA drivers, thoughts on Kit Cars in TT?
I know we have quite a few guys here who are running Miata's in TT (E correct?).
Reading through the rules, it states already unclassed kit cars/purpose built race cars will default to TTU until individually reviewed by the NASA TT director. I'm strongly considering building an Exocet next winter and I'd eventually like to get in to TT. Obviously it would get murdered in the higher unlimited classes until reclassified lower. I figure even a well built, NA NB1 engine with driver is going to put the car around 10:1 lb:HP ratio. Thoughts? |
Okay.
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It's a massively lightweight Miata with no windshield. Good luck getting it out of TTU, especially after you tell Greg that it's NB-powered.
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Originally Posted by Savington
(Post 1022778)
It's a massively lightweight Miata with no windshield. Good luck getting it out of TTU, especially after you tell Greg that it's NB-powered.
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Originally Posted by Savington
(Post 1022778)
It's a massively lightweight Miata with no windshield. Good luck getting it out of TTU, especially after you tell Greg that it's NB-powered.
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If you really wanted to do it, expect a tax of something in the 2.5:1+ point range (i.e. if you wanted to class it as a TTB car where the class minimum is 10.25, expect Greg to ask you to submit a dyno classing in the 13:1 range).
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Originally Posted by Savington
(Post 1022808)
If you really wanted to do it, expect a tax of something in the 2.5:1+ point range (i.e. if you wanted to class it as a TTB car where the class minimum is 10.25, expect Greg to ask you to submit a dyno classing in the 13:1 range).
I'm not too concerned with W2W racing (out of the budget thanks to the wife's travel demands), and I really like the idea of the Exocet as FUN (no window, exposed, lightweight) HPDE and possibly TT car. So I was curious if there was any possible way it could be competitive. It wouldn't appear to be the case. And if I say with the '90 because of the base model add-ons, I'd have to read back through the classing and TTE threads to see if I could just build it to one of those classes to scratch the competition itch. |
if youre going to stay with a 90, swap in a 99 engine (or 01 if you want, slightly more work), dyno reclass, and itll be a killer TTE/D car. it teeter-totters between those classes pending what mods you do, but makes for a front runner--pending the driver mod.
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I happen to think that a 01-swapped '90 chassis is quite a good PTE/TTE car ;)
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Excellent. I'll do some more rules digging and read the few threads regarding it on here about what potential impact my chassis stiffening mods make and if the 6spd is worth the points.
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You will hate the aero disadvantage in basically open wheel carwithout downforce. Light weight helps you in slower speeds. If tracks demand higher than 100 mph, stock Miata body may have advantage in straights. You will eat them in braking and acceleration from low speed corners. I had to downgrade my brakes to 1.6 to get them heated enough for track pads. (And have $20 used 13" slicks).
If you are in South-East (Road Atlanta, Roebling with mile long straights, forget exocet. |
My local track, ~35 miles from my driveway, is Hallett. Very slow, tight course.
Even on my sport bike top speed going into the braking zone for 1 was only ~125. |
Originally Posted by z31maniac
(Post 1022948)
Excellent. I'll do some more rules digging and read the few threads regarding it on here about what potential impact my chassis stiffening mods make and if the 6spd is worth the points.
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Originally Posted by Savington
(Post 1022974)
I'll make it easy - neither are worth it.
Since I originally only envisioned my car as an HPDE car and was building it how I wanted, I've done some things that aren't ideal for TT classing: FM Rails and Butterfly, Frog Arms, Sport Brakes, V8R Upper Front Control arms But after doing some reading here over the last few months, I've realized I can still build a fun, fast HPDE car, that should still be fun to compete in TTE/TTD with. |
Ugh, I also see my power steering delete is another point.
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Originally Posted by z31maniac
(Post 1023075)
Ugh, I also see my power steering delete is another point.
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Originally Posted by cucamelsmd15
(Post 1023160)
How do you figure? Its not a base model option.
12) Steering rack replacement or modification (without geometry change unless taking points for E.18). Rack ratio change is permitted. Change from BTM power steering to manual, and/or modification of the power steering pump requires the point assessment for engine pulley in C.10). We pulled apart the rack and did the Flyin' Miata "proper depower" and removed the power steering pump and all associated lines. Am I interpreting this incorrectly? |
Originally Posted by z31maniac
(Post 1023163)
Am I interpreting this incorrectly? http://www.miata.net/faq/Miata90-97A3.pdf |
Originally Posted by cucamelsmd15
(Post 1023164)
Yes. PS is not standard on any BTM model 90-97 Miata, ergo, no points assessed.
http://www.miata.net/faq/Miata90-97A3.pdf |
It's effectively a rack ratio change.
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