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-   -   Fuel efficiency...what MPG do you get? (https://67-72chevytrucks.com/vboard/showthread.php?t=284773)

77c10 02-24-2015 01:54 PM

Re: Fuel efficiency...what MPG do you get?
 
I get terrible miles per gallon but I get lots of smiles per gallon...

Oregoon 02-24-2015 11:15 PM

Re: Fuel efficiency...what MPG do you get?
 
Set my float up higher in my Mighty Monojet, and lost .83 mile per gallon. Gained a bit of advance, and a bit more pedal response, so I can live with it. Stumble is gone now, too.

Behold, 250 cubes of fury!

rs74 02-25-2015 02:46 PM

Re: Fuel efficiency...what MPG do you get?
 
1 Attachment(s)
Quote:

Originally Posted by rs74 (Post 7063619)
I am on my first full tank since getting this short bed diesel (6.2) on the road. 700r4 with 3.08 gears. I will report my results once I fill up next.

Filled up today and calculated. For a mix of highway and city driving I got 20 1/2 mpg. Not too bad for a 30 year old brick. I need to hook up a temporary tach so I will know how many rpm it is running at highway speed. Around 1800 is where they make their peak torque and I am running 3.08 gears. Might need to re-gear once I found that out. I have new injectors on the list of things that it is getting. I am sure that can't hurt anything.

trenda 04-19-2015 11:51 AM

Re: Fuel efficiency...what MPG do you get?
 
Quote:

Originally Posted by rs74 (Post 7065319)
Filled up today and calculated. For a mix of highway and city driving I got 20 1/2 mpg. Not too bad for a 30 year old brick.

Wow! That is impressive.

Driving like I had a load of nitroglycerine bottles on board, I got 16 mpg yesterday on a 80% highway miles run to Greenbelt MD after I switched from heavy 33x12.5 15 tires to 235/75 r15 Goodyear Wrangler AT's inflated to max pressure (and then maybe a few PSI on top of that.)

Does anyone know the impact of fuel temperature on mileage? My fuel line passes perilously close (1/2 inch max) to the right header on its way to the fuel pump. (It actually touched the header when I bought the truck, which may have explained a lot about the way it ran for the PO).

I felt the rubber fuel line from the fuel pump to the carb yesterday, and it was VERY warm. Would my fuel mileage go up if I rerouted the line away from the header and used insulated line from the pump to the carb?


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