TAFC Overdrive & Gears

I have a couple of quick TAFC questions that I was hoping someone could help me with.

In a modern Roots blown TAFC deal, what is typical for: Stroke, Overdrive, Trans Ratios, and Rear Gear? Don't need to know any secret combos, just what's typical.

Thanks.

 

We have to use a 4.500 stroke because our chambers are 192 cc's
53 to 56 over
1751st 134 2nd on wreck! or 184 -137 2nd gear
4.30 rear

 

That was helpful. Thanks.....

I know that in TAFC, the rules dictate 3 forward gears. Imagine for a moment that there were no such rules, then would you view a 4-speed as being beneficial in the same roots TAFC deal? Easier clutch tune too?

 

Our combo looks to be pretty darn close to the same as Mark's.