2017 Duramax Dyno Numbers
Looks like the GM guys are sandbagging the advertised HP and Torque numbers... The new Duramax is going to be a real stump puller. Link
Forum Discussion
fly-boy wrote:This talk is all very famaliar. In 2011, GM released their power numbers after Ford... They were higher than Fords. Ford quickly released a reflash program to beat GMs numbers... But then Ford got beat badly by GM in towing hillclimb test after test.... Then everyone started the debate as to why GM was able to do that with lower numbers.
It would be nice to see the magazines put all three trucks on a dyno and then go up the big hill!
My only thought is that the GM truck has always faired pretty well in the tests over the last three years- all while rated much lower in the HP/torque categories. So GM must have significantly less drive line loss or is very conservative in rating the trucks numbers- or both.
Many of the same theories that are being bandied about here were discussed then.
I followed that pretty close back then. The one thing that I thought made the most sense was that GM was (and I believe still is) the only one of the big 3 to use the strict SAE Dyno protocol.
It is my guess that is what is happening now.
Oh and there was a fella on one of the Dmax forums that ran his truck on his Dyno. IIRC, that 2011 rated at 397 HP put about 360 to the rear wheels.
His last name is one that many might recognize:
Granatelli.
