Yeah, that's kind of what I had expected. I goofed on the numbers. 50mph is 2000. 2100 is 55. I can't decide if I want to goto a 4.30 or all the way to 4.10. But again, I'd have to pry that money out of the bosses hands.
So not much changes on the 4 and 5's huh? I figured that would be the case. Years ago, at a class with ford I asked an engineer about it. He gave the standard "they are different because they are used differently" answer. But no details from him or anyone else I knew. I always thought the fueling curve might be a little steeper down low for the heavier loads. Because I have seen the VFDES rates differ between the big and small trucks at boost less than 10 psi. VFD made more sence to me because it follows cm3/stroke the way injection pump test specs are writen.
Anywho. kinda got rambling there.
Thanks
Roger
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Wed, April 14th, 2010, 11:19 PM
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