Ford 7.3 chipped mileage
I have a '99 F-350 dually, 4.10 rear, 4x2, that 3 years old to us. It has a Diablo sports chip in it that is not self programmable. Owner said it was tuned for towing and the chip is so old that Diabl...
Forum Discussion
Hybridhunter wrote:
Funny how the great mileage numbers come from guys who driver "average speeds". How about posting your highway cruise speed and let us judge what is average. No way anyone with a 7.3 is getting 20 mpg at 70mph, or 65 for that matter.....
Well, it depends on your definition of highway cruise speed. There's a huge difference between 65 mph and 70 mph on these trucks in terms of RPMs. For me, 65 mph is a shade over 2k RPMs. The best I've ever done is a little over 17 mpg. My truck is big, heavy, has 4:10's, large injectors, oversized tires, and MANY mods. 20 mpg with a smaller 7.3L truck, properly tuned and not venturing much over 65 mph is a very reasonable number. Spend a few minutes online and you'll find it to be very common. And yes, these are hand-calculated figures since many of these trucks don't have an onboard computer doing the figuring.
