How fast?
 

I just bought An Axial .28 motor for My Dirt Demon.

With my truck stock i was clocked at 40-48Mph on good days even 50Mph. My gearing is stock 12/52.

How much faster will i go now with my new engine?

I can't figur out my speed on this Calculator ( http://www.radiocontrolzone.com/cars/calculator.asp ):D

RE: How fast?
 

whats the rpm difference between the stock and the new one? although it might be easiest to just clock it once its broken in

RE: How fast?
 

The Hot Bodies Has 28,000 RPM

And

Axial Racing 36,000 RPM

Differnce 8,000 RPM

RE: How fast?
 

Give or take a few miles per hour, it should go too fast! Jeez man it already goes 48mph? That is plenty fast for a truck! Have fun though.;)

RE: How fast?
 

well... if you can actually hit the top RPM on both engines, and you keep the same gearing...

8000 RPM would give you a 28.57%(rounded) increase in speed.
Assuming you hit 48 at 28000, you theoretically, should hit 61.71 MPH at 36000

RE: How fast?
 

thats insane. youll have to clock it and see how close that estimate is;)