W/TH in NHRA classification?
 

Hi All,
hope you can help with our query. We have just finished preparing a 1970 Camaro with an LT1 and hope to be racing it here in Sweden in D/SA next season, but when establishing the legal weight we come across different shipping weights depending on whether it's a "coupe 2 door" or a "coupe 2 door W/TH.
I initially thought TH stood for TurboHydramatic, but the different weights appear also under "manual transmission", so what does the TH stand for?

350 350
* *
auto manual
360 360

3341 3341
3397 3397

325 320
12.19.02 1.1.15

I would be very grateful if you can tell me the difference between the 3341 lbs and the 3397 lbs.

Thank you!

Re: W/TH in NHRA classification?
 

The w/TH does indicate an automatic transmission.

Dwight Southerland has kindly put together a website that is more user friendly than the NHRA classification guide and has all of the critical data.

Please register with Dwight on this website:
http://www.classracerinfo.com/Default.aspx

For your car (1970 Camaro 350 cid / 360 factory HP)

Shipping weight w/ MT = 3341lbs. NHRA P/W factor = 10.44 NHRA HP rating 320


Shipping weight w/ TH = 3397lbs. NHRA P/W factor = 10.45 NHRA HP rating 325

Min. Wt. w/ driver:

D/SA = 3258 lbs. (NHRA rounds down to 3255 lbs.)
E/SA = 3420 lbs.
F/SA = 3583 lbs. (NHRA 3580 lbs)

Re: W/TH in NHRA classification?
 

Many thanks, that´s great.
Rick