Quote:
Originally Posted by Unobtainium
Recently I would have agreed, but clearly this isn't true of all cars.
Local guy bought a gt500, ran it on 2 different dyno's bone stock. Big numbers.
600 on the dyno jet, can't remember the other one. Got tired of the terrible tranny, sold it and got brand new ZR1. Took to same 2 dyno's. The power difference was way over 28hp. I think it was 40. Head scratcher, but my guess is that 600whp doesn't equal 660 SAE...
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Different dynos, even the same dyno on different days can make a difference in power numbers. And most people will say drivetrain loss on a manual car is anywhere between 10-15%. At 10% of 662 would be right around 600 RWHP on the GT500. Dyno's are just a tuning tool...the correction factor can be manipulated to show anything. Hence when the 2011 5.0 came out they had the online dyno showing 395 RWHP which everyone knows was high