Air/Fuel Controller Installed

[89Vette]

We have a Rodeo ECU (Rodeo here is a pickup, not a wagon) that we are going to try. Rodeo 3.5s dont have knock sensing, EGR or variable intake runners but they do have the highest quoted factory torque/power of all the 6VE1's sold here so weez thinking maybe the Hitachi ECU has better mapping than the Delphi, plus its a completely sealed unit.

BTW...Are you certain the cam's are the same? Even within SBC's their can be cam differences which would account for rating's differences.

I'd be surprised if Isuzu left any timing on the table. OTOH, raising PE from 25% to 50-60% could be worth 1-2mpgs.

I'd bet a good 2wd/4wd switching system (or even gear box) would make as much or more difference. (maybe combine the two?) FWIW, any Jeep I've ever seen rated (and/or owned) did much better in 2WD vs 4WD mode. I could feel a difference in power as well. Just seems to be way less drivetrain loss.

Look at the difference in the 2wd vs 4wd Ford Escape's MPGs. Fairly significant in my book. (I wonder if there's any other changes in gearing, etc between these.)