i hope you get your mileage goal 
460 mpg question
Posting Guru
Joined: Mar 2006
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From: fargo, nd
my 1978 f250 4x4 when i finally finish it will be a 460 stroked to 545, with a dual quad intake, running twin 425 impco propane carbs, about 12-1 compression, retrofit hydraulic roller cam and lifters, and will get about 4-6 mpg of propane and push about 500 horse and 650 ft-lbs torque... now thatll be a fun truck- until i have to fill it with gas 
Freshman User
Joined: Jun 2007
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Originally Posted by darrin1999
a 94 would be an e40d... computer controlled... so the computer may have just been reprogrammed too. lots of modifications could have been done in 13 years
Junior User
Joined: Dec 2006
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i have a 1991 460 with headers k&n and throttle body spacer with 3.55 gears E40d trans and 35 inch tires i get 10.5 every day no matter how im driving the reason that im getting 10 and some people are getting 8 or less is because i have an E40d trans and the 3.55 gearing also the k&n filter gave me two mpg however the headers and spacer gave no mpgs and i also throw in a bottle of injector cleaner every thousand or so miles which helps
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I HAD an '86 F350 single cab dually with a C6 and 4.10's and no matter what I did I got about 7mpg. On the plus side, I put an edelbrock performer 460 intake on it and rebuilt the factory carb and it pulled a 9.9 in the quarter :-) On the down side, it didnt take long before I bent 12 of the 16 pushrods and oil circulation issues did the rest :'-(
Posting Guru
Joined: Mar 2006
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From: fargo, nd
"it pulled a 9.9 in the quarter " you mean the 1/8th right? no possible way that it would get 9.9 in the quarter without lots of nitrous, a blower, and/or a stroker kit, unless you mean the quarter kilometer
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Joined: Apr 2007
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No, I definitly meant a quarter mile. I don;t know what was done to it, I bought it as a womped out old horse puller, adn with minimal work it used my head to crack its back window when I used too muck gas.... If i could figure out how to insert a picture I'd show you one of the old girl turning her 4 rear tires into smoke :-)
Posting Guru
Joined: Mar 2006
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From: fargo, nd
do you have any idea how much power it would take to push a 5000 lb truck to 9.9 in the quarter mile? more than even monserbaby's race truck puts out, and hes at about 900 horse with a 528 stroker, custom solid roller cam, 14-1 compression and race gas
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As a matter of fact I do, it was a f*in beast! but really there wasnt anyhitng too special about the engine, it was just a 460, headers intake, cam and rebuilt holley 800 up there... I always attributed it to the C6 and gearvendors combo
Post Fiend
Joined: Mar 2004
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From: Union, Washington
Originally Posted by f350mothatrucker
As a matter of fact I do, it was a f*in beast! but really there wasnt anyhitng too special about the engine, it was just a 460, headers intake, cam and rebuilt holley 800 up there... I always attributed it to the C6 and gearvendors combo
I've seen in quite a while. A 9.9 sec. 1/4 mile truck would be next to unstreetable and totally worthless as a tow vehicle.