MPG threads

yeah it may look easy but not so much. LOTS of testing has gone into those threads. The only two I never was able to say yes or no on were the 2nd air dam and the tailgate spoiler. I suspect the tailgate spoiler only works on lowered, normal height 2wd trucks. I know the 2nd air dam actually had an effect once I dropped down from the 3" springs to the 2" springs. I could actually hear it rattling. Plus in MN the fluid film was blown off on the bottom half of the front diff. I suspect that one would be better if it were a 6" version that dropped down another inch vs the 5 I worked with. Leveraged the idea from Ford's F150's which also inspired the tailgate spoiler purchase. Saw a video a while back of the F150s aero developments and one of the featured area's was the 3rd brake light & the integrated tailgate spoiler. They did not mention how much of a benefit it was but it was a contributor to their numbers.

I am planning to drop back in a 190* t-stat in prep for the efan install. I believe I will have a mpg drop with it. I want to have it there to give an extra 10*f of head room with the assumption that the fans dont fit (too thick) and I have to run around for a weekend fixing it. Heading back to Cali over Memorial day weekend and will be there the whole week, maybe thats a good time to do the install since I'll have my tools to fix whatever problem I encounter.


RE: calc load question... nope that example you gave wont work, you'd be in a higher rpm range which would be potentially dumping more fuel. Depends on the tune. ONe of the biggest things that can be done for improving mpg with the tune is to drop rail pressure in the cruise zones. 3 injection events, lower pressure across all events will drop fuel useage.