Originally Posted by zipperfoot

Few questions before I make the purchase...

Does anyone know the final drive ratio so I can figure out my own gearing without having to bug you guys?
I plan on running a 13.5. What gearing works?

Found this funny since you went ahead and "bugged" us anyways about gearing.

Also, I am going to run at SRS which is an outdoor track, hard pack, and at a indoor clay/dirt track. Should I start with RM3 or RM4?

Billy fisher runs rm4 at srs and rm3 at tuscan.
His setups found here: http://www.petitrc.com/setup/durango...ngoDEX210.html

Finally, everyone seems to be running four hole pistons, in the range of 1.2, 1.3, and 1.4. Does anyone make pistons in this size or should I just drill out some blanks?
Ghea racing makes them for the car but they are 22 bucks on Amain.
I epoxied the stock ones to have 4 holls and have worked fine. I would recommend that unless you want to drop the 66 bucks or so to get all 3 types.