Quote:
Originally Posted by GM Duraturd
Yes and marty is only slightly above the hp range of a 275 tuned 6.4 which is the truck in question in this thread.
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So 100 hp slightly above
Seriously, the way a 7.3 pulls is dramatically different then how a 6.4 pulls.
For 7.3's it's simple. Keep it in 2nd if you have less then 450 rwhp on average tracks, let it shift to 3rd if you have more then 450 rwhp on average tracks.
Tighter tracks require lower gear, looser tracks allow higher gear. You want to gain 2 things when sled pulling. Momentum and wheel speed.
Here is what I do, and may or may not work with 6.4's or 6.0's.
I manually have it in 2nd gear with O/D clicked off. I build about 10psi of boost and go ahead and bring the sled out. I lock the converter as soon as I'm at 3200+ rpm's. Then I shift it into D to allow it to go into 3rd. The sooner you can get your wheel speed up and into your final gear the better chance you have. Usually I try to have it there by the 75 foot mark.