goes back to earlier transmissions. Running with a 1:1 drive in most transmissions means that you don't put power through countershafts etc and minimize frictional losses. If the dyno is "told" drive ratio to get speed vs RPM (or just measures it) no big deal. The effect will be that if your dyno run goes faster (shorter time) the effect of lightened rotational mass will be higher, IE you'll get higher HP numbers for things like lightened crank pullies, flywheels etc. Even in 1:1 the torque makes a back and forth path in our transmissions, so I don't know if it really runs with the lowest losses there.

Matt

 

For the sake of uniformity, though, we should ideally all choose one gear and run from there.

 

Todd,
You try both and let us know the difference.....:smile:

 

You bet! next time I have my car strapped down i'll do a couple pulls in third and couple in 4th.

 

Yea!! Thanks Matt!

 

Yeah, thanks!