W/TH in NHRA classification?

[Greg Hill]

Originally Posted by RickMcCannGTCA

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

Your horsepower factor is 325 with an automatic or 320 with a stick. Minimum weight in D/SA is 3255. with a stick it's either 45 or 50 less. The w/th is with an auto, stick shipping weight is lighter.