The Big Three's New Diesels put on a Dyno

travelnutz wrote:
Total and complete bull as it was staged on purpose as the Duramax clearly out pulled the other 2 up the Ike Gauntlet with ALL 3 pulling the same/equal matched load of total weight and did it with a 3.73 rear ratio while the other 2 had a torque force enhancing 4.10 rear ratio giving 10% more delivered rotational force and they still lost! Get real! The Dyno test done right measures the very same rotational force that had to be delivered as the up hill towing test and defies logic and known physics rules and proven laws.

To be honest, I think the fact that it had a taller 3.73 gear ratio helped the GM get up the hill quicker by allowing it to stay in the rpms it makes the most horsepower longer.

For example, if Ram and the GM were at 42 mph. The Ram would have had to be in 3rd(1.34:1) at around 2,400 rpm because 2nd(2.00:1) gear would have put way it over it's max engine speed. The GM would be in 2nd(1.81:1) gear at around 2,900 rpm making more horsepower since both trucks peak at 2,800 and is putting down more torque due to being in a lower gear.

If the GM had a 4.10 ratio, then it would have been forced to up-shift to 3rd(1.41:1) to 2,500 rpm at that speed because it would have been over the max engine speed in 2nd.

Ram in 3rd gear at 42 mph: 1.34x4.10= 5.49 torque multiplication

GM in 2nd gear at 42 mph: 1.81x3.73= 6.75 torque multiplication