by Mojave Magic » Thu Apr 22, 2010 4:28 pm
My 88 with 2.6 and 3.90 gears runs at 2500 pretty much right on the nose at 60 most days.
I'm still jetted a little lean and strangely enough, my rpm at different speeds changes with the weather. On cold days, at 45 it will be slightly above 2000, but on hot humid days, it will be almost as low as 1750. Same at 55, it will vary between 2100 and almost 2400. I get better power and gas mileage a 65 degrees and up, so it's not completely in my head either. Recently in warm weather, I just ran through an entire tank moving stuff from our house, hauling garbage and scrap metal and got 22.3mpg. In the winter, it will be down near 18 or 16 if I play in the snow a lot. One of these days I need to rejet, but don't have the time right now.
1988 Power Ram 50 75k miles SOLD
1998 Ram 3500 quad cab SLT Laramie 5.9 12v Cummins