engine/wheel dyno results

dusterdon said

You have to realize that some engine dyno's are "Happy", meaning that they read a little more than actual hp to keep the customers happy. So if you couple a happy dyno with a chassis dyno that may be calibrated a little low, and you can get something that looks like you have a lot of driveline losses, when in fact you don't.

Click to expand...

Ain't that the truth.

I know of one engine dyno in the LA area that consistently runs about 10% higher than another dyno. Funny thing, the "stingy" dyno is almost spot on when cars hit the track for mph/weight calculation... :-k

Yet the stingy dyno operator always gets told his dyno isn't right... OK

In my experience, the biggest contributor to loss in a auto trans is a power torque converter for the combo.