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southern Alberta | Ive had all 3 makes of engines in trucks at the same time. Pulling identical loads, on the same road, one behind the other they would all run about the same for power. truck #1 has a C 15 Cat, 475hp with 3.90 rears and 18 spd, #2 N 14 Cummins, 500 hp with 3.90 and 18 spd, #3 series 60, 450hp ,but played with, 4.11 rears and a 15 overdrive. The Cat will walk away from a rolling corner better, bigger engine displacement. The Detroit does not get driven under 1450 rpm or it will lose ground quickly. If we run it between 1450 and 1900 RPM it will keep up easily. For us an 18 spd would really help this unit. The seat feel is dead on the Detroit, you would swear it is the dog of the group. But it pulls as well as the others, once up to speed. However it will beat them all at the fuel pump by about 1/2-3/4 of a mpg, so that works for me. As Ernie suggested run it to a Detroit shop and have them plug it in to read your settings. They can do a lot of stuff with that computer. It should have the variable pitch turbo, you can get more boost/power by playing with the spring tension. | |
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Detroit 12.7 pulling ability?
