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Discussion Starter · #1 ·
Got my car dynoed: the tuner uses a flywheel dynojet.
They do the dyno at the axle w/o the wheels.
Got 365fwhp and 360fwtq.

I'm wondering if those nbs would be lower if dyno was performed at the tires?

What is the reference? fwhp or rwhp?

-Matt
:usa:
 

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If the measurement is taken aft the driveline, it is still considered "rear wheel" or "Chasis dyno" numbers. Flywheel dynos are mated directly to the flywheel with the engine out of the car and a viscous coupler is what puts the load on the engine.

T56 driveline loss is about 13%, give or take. This is a very subjective number.
 

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MikesZ06 said:
There was one of those dynos this year at the Fest.
Weirdest lookin' contraption I ever saw :screwy:

Mike
So, you actually remove the rear wheels and it bolts up to the lugs?
 

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That setup is still a rwhp rating since it does go through the drive line and there will be the usual parasitic losses associated. The setup helps eliminate the potential of the tires being a source of inconsistancies such as slipping due to traction, air pressure, how well the car is tied down etc... The claim is that it is a more accurate method.
 
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