average GPM concerns
OK so I took my first trip that was more than 40 miles down the road. My 2000 F150HD 5.4L gas and the drive train in the truck are rated for 8700 towing, my 5ver was at approx. 7600, I was hoping for ...
Forum Discussion
g4sbrg wrote:
is it more the weight or the exposure, I am pushing about 32 feet, some old literature on the truck stated not to exceed 60 feet above what the truck exposes, and do any drafting device show potential. V shape wedge on the top of the cab ??
From what I've seen most people don't think those wings and such do any good unless they are custom designed to fit the truck and trailer. Semi's use wings like which are custom fitted to the tracter and trailer that but the out of the box ones you buy aren't custom fitted. And even when they work they gpm improvement is small. Semi's drive hundreds of thousands miles per year and a small mileage improvement pays for itself. But you aren't pulling that fiver that far.
I'm a little surprised that you managed 9-10 gpm. You must of had a tail wind. 250/350 gassers are doing good to get that high a mileage pulling heavier 5vers.
