Big Three road tests
Found this review on line, of the three heavy duty pickups.
Forum Discussion
Huntindog wrote:
Ever wonder how GM arrived at 397 HP?
And how Ford always has nice round even numbers?
Simple, and has been proven before.
GM tested the Dmax for reliability and power, then dynoed it to SAE standards to see just how much power it makes.
Ford wanted a nice round number that would exceed the Dmax. So they tuned for a number on the dyno, but not to SAE standards.
Think about the difference between peak HP, and continuous HP.
The Ford can indeed make the advertised HP/TQ for a short time. Then the computer dials back the power to keep it from hurting itself.
The GM can make their lower HP/TQ much longer. Long enough to meet the SAE standards, and likely continuously.
So in effect the GM wins on the road,,, time after time.
I disagree... The last Ford power curves I've seen on the 6.7 PSD looked pretty darn flat to me.
