Screw blower

When using screw blower, what's the most common overdrive and transmission gear ratio and rear end ratio???
Thinking about putting a combination together in a door-car.
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Thanks for any input...

 

Might be a good question for the boards over at www.promodsource.com .

 

I agree. But I'm just curious about what you guy's are running in your TAD/TAFC. Not that many run's setups like that at promodsource.

 

the biggest difference between a ta/fc and pro-mod is the weight. a pro-mod is around 500 pounds heavier. i know a roots pro-mod runs somewhere around a 2.10-2.16 first gear and a 4.56 rear. i would guess somewhere around a 1.98 and a 4.56 to start with the screw on the pro-mod. just guessing

 

We run a door car with a screw. Can you give me a few details about your combo. Example - Engine type, and what screw you are using? PSI D or C rotor, or Whipple. I will be glad to help with whatever I can.

 

Lonnie check your PM.