So, How Many of yall have 351M's in your trucks?
#46
78custom,
I realize the 400’s have several more horsepower and more torque, how are they for fuel economy? Are they about the same as the 351’s? I realize that a smaller engine doesn’t always mean that it uses less gas. My brother-in-law bought a 6 cylinder thinking it would give him greater fuel economy, it uses about the same as my 351M. I guess it’s the ridiculously high cost of fuel these days that makes me curious.
Thanks,
John24255
I realize the 400’s have several more horsepower and more torque, how are they for fuel economy? Are they about the same as the 351’s? I realize that a smaller engine doesn’t always mean that it uses less gas. My brother-in-law bought a 6 cylinder thinking it would give him greater fuel economy, it uses about the same as my 351M. I guess it’s the ridiculously high cost of fuel these days that makes me curious.
Thanks,
John24255
#47
Originally Posted by John24255
I realize that a smaller engine doesn’t always mean that it uses less gas. My brother-in-law bought a 6 cylinder thinking it would give him greater fuel economy, it uses about the same as my 351M.
#48
My 1979 F250 with a 351M and 100k on it, had been sitting in a farmer's field unused for two years when I found it. Added a quart of oil, took the air cleaner off, a few drops of gas down the carb throat, and turned the key on a cold December day. It started on the second turn of the key, and drove the 300 miles back to my shop (on a temporary permit) without a complaint. Then it sat in the snow for another four months and, once again, started on the second turn of the key to be driven into the shop for restoration.
Now that's reliability.
Now that's reliability.
#49
#50
I got a 400 in mine.. it runs ok, burns quite a bit of oil,, has a brand new oil pump and only carries 50psi when cold!. I had to put hoter plugs in to keep it runing.. but ive gave it hell and keeps going. Like today putting it in 1st and just mashing on it for like 20ft in a mud hole.. lol.. But its soon to be gone for a 428, it will probly get better mailage then my 400 does. My dad has a new 400 crate motor in his F-250 and it carries low oil pressure and over heats its a dog too. but dont smoke any YET.
#51
#52
#55
#56
i have a used and abused 1978 f-150 with a wore but strong 351m with too many miles, backed by a new c6, 2wd, supercab longbed, ol bubba's got hedmans with a true dual 3" exaust that i built myself, with two xps mello tone mufflers. u should hear em! hes got sand in the engine, yea im wonderin how it got there too, i put a oil pressure gage on him, and when im idlin and in gear, hes got bout 2 or 3 psi oil pressure. strange though, he doesnt burn any oil, doenst smoke, and even though he makes some racket when hes floored. still takes off like a rocket and never complains. he was hit in the left rear, hes a new jersey truck (quite rusty) but the frame doesnt have any rust on it, but i can stick my foot through the floorboard. still solid though, doesnt creak or rattle, much. this poor ol pickup has had a rough life so far, but i take care of him like my own child, and hes never let me down. i think hes a testament to the durablity Ford trucks. they can take a lifetime of crap and keep on tickin.
#59