It was fun asking what the heck she was doing when she used my truck! On the plus side now I will buy (in a few months) a little dual sport to putter around on. And save the big girl for heavy hauling.

 

Maybe she's wearin' the famous lead shoe that fits the lead foot.

 

I must say yes to the lead foot/shoe combo...

 

I've posted before. Here it is again. 460/C6 5.13 gears on 42" Irok's. 6.2 m.p.g.
I hate the m.p.g. but love the power...........I think I am over geared. 3000 r.p.m. at freeway speed.................

 

I feel the same way with my C6/4.56/37s combo. 70 mph is around 3000

I love the power off the line, so the only way to fix it that I see is to swap in an E4OD or a ZF5. That could really help my highway mpg. Around me all the highways are 55mph, so not a big deal, but it'd still be nice.

 

Since everyone is talking about MPG's, I hope someone could help me with figuring the ACTUAL mileage I am getting. I've used my GPS and the speedo is reading slower than my actual MPH. I have taller tires than factory, don't know specifics off the top of my head.
I work in a small town and live in an even smaller town. From city limits to city limits according to road signs is 8 miles. My odometer reads exactly 6 miles from sign to sign. Also another tidbit, I routinely get approximately 200 miles out of my front tank (rear gets much less). So with knowing the actual miles I'm travelling going from home to work, I should be able to figure my actual MPG. I'm thinking, take the 200 and divide it by 6. That way it would show the number of these "6" mile long trips I'm taking. 200 divided by 6 is 33.33 repeating. So then I'm thinking, I take these number of trips (33.33) and multiply it by 8, for the ACTUAL miles I'm going. So 33.33x8=266.64. Now since I've figured up my actual miles traveled, I'll divide by 18 which is my front tank size. That ends up being 14.81. Is this math even remotely correct on figuring my actual mileage? If so, awesome. If not, I probably made myself look stupid. If I just go by my miles shown, I get 11.11 repeating.

BTW truck has intake air horns cut off, cat cut off, dual in dual out 2.5 muffler, and E4OD with 3.55 rear. And I wanna say that my rear tires are around 32-33 inches tall

 

The front tank is 19 gallons. If you're getting 200 miles off of it than you're at just over 10 mpg if you're running it pretty much empty and switching tanks.

Your GPS should be an accurate odometer. You may also want to consider getting your speedo and odometer close to accurate to make the process easier.

 

Well, damn. Lol

 

Well, that's assuming it's a long bed. I don't see many old shortbed trucks so
I made the assumption. I believe the shortbeds may have 16 gallon front tanks.

 

Just get an older diesel, and not a new diesel! I work on newer diesels we had a unit that could only run for 45 minutes to an hour, not even a year old, had codes from egr needed a recalibration to crank sensor and fuel water separator. Ended up being water in the ecu plug and the egr plug was full of water too. And the god dam regens on this diesels now, were just gonna pump so much diesel in to burn out all the soot, how is that better for the engine and mpgs. Personally I have a 7.3 idi its simple to work on and with a little work makes lots of power, and better milage than a 460. I got my diesel with 232,000 kms. And unloaded it gets 22 mpg

 

Yeah, single cab long bed

 

I have a Bronco with a 460 in it, we put it in there many years ago.
73 Heads, Cam stock cam from 70 Lincoln (365HP 500lb ft tq) and with a holley 4 barrel vacuum secondary and 60mph I can beat 12 mpg.

My old shop teacher in HS drove Two F150's, one was a 69 the other was a 70 one with a 429, the other with a 460. He routinely got 15mpg.
He always said the secret to mpg in a 460 was to use a camshaft from a 429 two barrel engine. Where would you find one today? I have no idea.
He used a simple Holley 600 vacuum secondary carb on them both.
No fancy overdrives, just a C6 and 2.75 gears...
So it can be done....

 

By the time you use 2.75 gears, you don't have the off the line power that makes a 460 setup so sweet... It'll get good highway MPGs, but not setup with much performance or hauling in mind.

 

Thats where your wrong his trucks run you would never guess they was 2.75 gears.
I did drive them occasionally to the parts store. There no lack of power there I promise you.
I've had a few 460's in F150's myself and slow was never an issue with 2.75;s or 3.00 ratios and a C6.

 

I can believe that they were probably quick unloaded. Being geared like cars though, load hauling abilities of it being a truck must have been affected. There's no denying that it's more difficult to pull a load (let's say 5k lbs for conversation) with 2.75 gearing than 3.55s, 4.10s or higher.

If you're setting something up just for cruising empty (especially an old lighter truck like what you speak of), then a gear like a 2.75 or 3.00 is a good option for economy while still having power.