Quote:
Originally Posted by Truck Norris
I have seen first hand a few GT500's have only 5% difference from SAE during a dyno day where all the other cars had the standard 15-20% loss. Most were SRA, with Tremec 6 speeds.
They were the old 2011-12 5.4L's with the tiny non-TVS blowers that were rated at 550hp and put down 521whp and 522whp at redline during the same dyno day a 2011 5.0L put down 365whp. There are countless other GT500's that have around 7% drive train loss as well.
So either they have lowest reported drive train loss of just about everything out there or these hand built mod motors are making more power then advertised.
I'm not trying to argue as I think the LS9 is one bad mofo of an engine, just disappointed when I see so many vids of them making 520-530whp from a engine that rated at 638hp
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this is just an example of taking happy dyno's for gospel and then comparing them to average numbers from more conservative dyno's. the only way to truly compare is same dyno, same day.
plus if you want to compare performance numbers, well, the gt500 retains it's title of the highes hp, worst performing car in the world.