Ybakoff

I have one of these dyno's.

Just wondered how accurate they are.

I was playing around with a few stock motors and can get 27,000rpm @5v from a monster horsepower.

Which I would say is wrong,

What sort of numbers has anybody else been getting.

Thanks Ybakoff..

Aaron Waldron

Comparing power numbers on dynos serves no purpose. We don't race dynos! I've had "dogs" on dynos turn out to be screamers on the track. All dynos read differently.

The only thing I look at on dyno sheets is the efficiency numbers.

Ybakoff

Ok. So how is the best way to check them. How do you measure the eff??

Aaron Waldron

All dynos I have seen measure efficiency as well as RPM's and Watts of power.

The closer the efficiency numbers are to 70, the better.

YoungChazz

Paul & I use the Indi dyno. We don't know what the numbers mean, or whether they're real, but it does serve to compare one motor to another or different set-ups on the same motor.

We have some Monster numbers, both amps and RPM on Monster stock motors on our Indi dyno. They were fast motors on the track.

We've also had some motors dyno poorly that went well on the track.

Use the numbers for comparison only. If you change springs, or brushes, or both, the Indi will tell you whether it's better or worse. The Indi will tell you if one motor's turning more or less RPM than another, and whether one motor's drawing more or less amps than another. If we've got two motors, and one's going in a truck and the other in a buggy, the Indi helps us choose.

We never compare numbers from our Indi to numbers from any other dyno, and never compare our motors to someone else's based on any dyno numbers. As Aaron says, only the track can tell for sure.

Ybakoff

That's the way I use it. But I wasn't sure if there was a better way.
I posted the same thread in on road as well and was told of this thread.

http://www.rctech.net/forum/showthre...threadid=13098

Hope it helps you to.