Chassis dyno. Even from dyno to dyno of the same make/brand differences can vary.
In the end, it's a "tuning tool" more than anything else.
It would be interesting to know at what RPM peak power was made and at what RPM was peak torque.
On our 4.5" stroke engine the RPM difference between peak power and peak torque was around 1600 rpm.
Tested on a engine dyno.
Smackdown: Engine Dyno vs. Chassis Dyno
https://www.motortrend.com/articles/...chassis-dynos/
.
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE