What kinda fuel mileage is everyone getting out of their 460? I know they arent gonna be a gas saver but mine gets less than 10. Seen it as low as 6 and highest was just under 10. Mine is in a 2wd 79 crew cab with a c6 auto

 

I daily drove mine to work for about a month when I first got it (79' F250 2wd, C6 auto) and got around 7 mpg at best. That was at an ave. speed of around 55mph. Mine has 125,000 original miles, it was running a little rich, with some tinkering I hope to improve it some...I'd love to see 10mpg, lol.

 

I definately dont feel bad then, i may have been off on my numbers on that tank that bumped 10 cuz its the only time it got close haha

 

I don't have a 460 myself, but from what I've read on other threads, double-digit fuel economy from one of those in these trucks is like a unicorn...

 

I think the gearing has alot to do with it, I haven't decoded my vin on my 79' so I'm not sure what gears came in the F250's, but I plan on swapping the motor and trans into my 76 f150, so with some taller gears I hope it improves!

 

About 9 mpg. 181,000-C6-3.73-235/85/16

 

8mpg c6/4.10/35's

I also drive a hybrid so it all evens out

 

9-10 avg with 460 .030 over hypereutectics rv cam c6 3.55 245-75-16s according to my math calculations and i got 10-12 with 315-75-16's but they began hurting my 2nd gear so i dropped sizes but it runs a 14.4 1/4 and when i am playing hard its about 1/2 of my normal mileage

 

I changed from a 3.89 I think to a 3.00 with 30" tires and a c6 got 12 a couple days ago running into a bit of wind. Went from 3,000 rpm at 70 to 2500rpm, the old diff would be perfect with an overdrive

 

What number does "sucks" equate to?

 

Before my diesel swap my 460 was sitting about 8 and 4. Averaged about a 100 miles out of the 19 gallon tank.

 

I never even bothered to check.

 

Here is an option-
http://www.ebay.com/itm/151156567286?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

"sucks" = 460 gas mileage! Or a crappy 400's mileage! I thinking of going to a 460, since I'm gettin such crappy mileage, I might as well have the power!


Although, I did have a 94 F350 4x/CC/LB/460/4.10's and 35's and could get 12 if I could keep my foot out of it,,, IF, IF I could but alas, that was EFI,

 

Could always be ambitious and do an EFI 7.5L swap...