Hi, we are updating our rules for next year's 12th scale oval and I would like some opinions on motor and battery choices. If we were to allow 4-cell stock, 4-cell 17.5 and lipo-21.5 would one have an advantage against the other? our track is a 70 ft. runline so we are not looking for 10 turn power here just a few choices for the same class. If we ran these three combo's at the same time would it be fair, or would one have a clear advantage? Thanks for the info!

The li-po 21.5 would have the advantage. How would you get 4.8v out of a li-po? you would have to run a 7.4 lipo, which even though coupled with a 21.5 would have the advantage due to the fact that the 21.5 is a torque monster! The extra torque could be used for much higher gear ratio and possibly gain some top end on the four cell cars, also the run time on a 7.4 li-po/21.5 , when you figure the torque to weight ratio on a 1/12 car, would be phenominal.I could see people running a 1:1 ratio,or higher, with that set up and being ballistic without over heating either the speedo or motor due to having such a light weight chassis, and smaller O.D. tires than a 1/10 scale oval car.

We would be using a 7.4 lipo. I was under the impression that the voltage was higher, but the motor was slower. So it is safe to say that lipo would have a definate advantage. could we impose a weight or gearing rule to bring it back down to a level playing field?

On a small track like that I am not sure you would see an advantage to any of them. Not really 100% sure, but it wouldn't seem you would be able to wind out the brushless motors.

Yeah, you could impose a role-out/ratio rule for the li-po cars,but, I could still forsee complaints if you let them run with the 4-cell guys. Especially limiting the gear ratio on the 7.4 /21.5 combo you would see these cars keeping all sorts of speed through the corners due to the increased torque.So the li-po cars would still have the advantage. I think you would be better off to run the li-po7.4/ 21.5 cars in a seperate class, and let the 4-cell guys run together.