Speed Calculator

[captain harlock]

Originally Posted by BrianG

From what I've seen, the slipperential tends to create a low gear ratio. To get more speed, try using smaller spur, larger pinion, higher voltage, higher kv motor, and/or bigger tires.

And don't forget, once the calculator gets past ~45mph, wind resistance plays a BIG role in actual speed (depending on vehicle).

Your suggestion is a bit hard to make since it'll cost money.

I believe a direct drive ( cd-pinion) would help alot.

Promod once ran a Lehner XL1600 with 6s lipos in his truck with a centerdiff and it made a nice 50mph for him.

I'm 100% sure the problem is with the slipperential( it's for racing).

ultimately i think your fighting a loosing battle because his car has more top speed potential than yours... but if you want to try... i think i saw a 24t pinion in the rc-monster store... theoretically that will give you a 20% increase in top speed and its quite cheap compared to getting a whole new motor... if you still have your emax tranny, you can slap that back in there for the race as well, that should theoretically give you another 20%