13.73 hwy. 3.55s, zf5 @2k rpm, or around 70mph, stock EVERYTHING! Tires are 10ply, and the a/c was off


I think ponyk has it right the key to these motors is RPM keep them low and go.

 

Theoretically, if you had good headers with a tuned exhaust, 2wd (strictly for less weight), timing bumped 13-15*, maf, a gear vendor (to get double od), tonneau cover to cut the wind, delete smog crap, run electric fans, and you have larger tires but find a way to lower the rig a bit to cut wind resistance, you could hit 15mpg.

But that's a theory. My best was 13mpg. 55mph cruising for 250 miles on a 19 gallon tank.

 

Project MPG is completely right in every aspect.
Those concepts apply directly to the 5.0, 5.8, and 4.9L as well.

My best gains came from a 3G alternator, Bosch Type III injectors, and E-Fans.

 

former farm truck, 96 f250 2wd CC 7.5efi ZF 3.55s 235/85/16 10ply allseasons. got it with 260,000km run beautiful, pass etest flying colours consistent 6.5-7mpg, never was driven over 60mph. we were afraid to put a trailer behind it!!!
we only used it for a year, its still waiting for its diesel conversion.


my next 460 will be in my 86 E150 shorty. won't be efi, and it won't be stock!

 

My best coming back from CA last July was 11.6 @ 62 mph. '88 crew cab dually C-6 w/4.10's.

 

This is what I had...down from Spokane to Moab and back and got 11.9, sitting right around 60mph the whole way (pulling about 6k lbs). A road trip empty from Spokane to Seattle at the same speed empty got me the same mpg (11.9). I put premium in for a trip once and I got 13.5 empty, but that was only one trip.

96 ExtCab F250 SRW, 460/E4OD w/4.10s.

 

I'm curious pound for pound, what the difference in miles per gallon would be with a Speed Density 460, and a MAF 460, with all the same features, just the intake and computer difference (and sequential fire for the maf model).

 

I'll bet the MAF can at least be tuned to get better for daily driving.

 

I think it can definitely be tuned for more power or torque. but I don't think without changing out the cam, and doing a port and polish on the intake manifold and Head, could you really get a significant change for mpg, at least not by just the computer.

 

I just picked up the truck and it had 10 year old gasoline in it… two full tanks. I sure as hell wasn't going to dump it so I ran it 40 miles, filled it up, ran another 40 and refilled it. By the time I got to Las Vegas I was up to 8 mpg from the six I first got… finally hit the 11.6 in Nebraska.

 

92 SuperCab LB 4x4 460. With 33" tires (speedometer corrected w PSOM), E4OD and 3.55 gears, I CAN get 14 mpg. On level highway, 60-65 mph and driving like I have an egg on the throttle. Still gets 10 towing 5-7000 pounds IF you take it easy. 266K on stock engine also. I tried timing bump to 14 then 12 and went back to 10 so I can run 87 octane fuel.

 

Well right when I got my F250 I got averaged 11-12 and best of 14. After I did my L&L headers, smog pump delete, exhaust and synthetic oil in the engine and trans, I hit 16 once driving 55-65 and got 12.5 pulling a mustang. The average was like 12-13. It seem no matter I'm hot rodding it or pulling not so big a load it will get 10. When I pulled my F350 CC 7.3 home with a 30 ft goose neck trailer it got 8. The pickup is all stock besides the headers has no AC or cruise and has 3.55s. It will cruise down the at 2k RPMs at 70MPH