Engine swap
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New User
Joined: Feb 2006
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Engine swap
Hi all, I have a F-250 with a 460 big block. I am thinking about putting in a 5.4 or 4.9 liter engine and tranny to try and get better gas mileage. Right now I am getting about 8.5 mpg and I have to do something to improve my fuel economy.
Does anybody think it is worth my time and money to do an engine trade in this situation?
2muchtruk
Does anybody think it is worth my time and money to do an engine trade in this situation?
2muchtruk
Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 5
From: Albuquerque
Not IMHO...
IMHO...I do not think it is worth doing this engine type swap. Being that your F250 is a 1994.
However, the easiest way would be to find a 5.4L donor truck...with all the parts you will need. I would try and find a donor not older than a 2001 model year.
Or better yet...replace your current engine with a 5.8L. I remember the 'ol 351's would get most drivers any where from 12-18 mpg on the highway. Still LOTS of work...but might be easier on the wallet than the 5.4L.
Good luck with whatever you decide.
biz
However, the easiest way would be to find a 5.4L donor truck...with all the parts you will need. I would try and find a donor not older than a 2001 model year.
Or better yet...replace your current engine with a 5.8L. I remember the 'ol 351's would get most drivers any where from 12-18 mpg on the highway. Still LOTS of work...but might be easier on the wallet than the 5.4L.
Good luck with whatever you decide.
biz
More Turbo
Joined: Sep 2002
Posts: 515
Likes: 1
From: Windsor, CO
Originally Posted by 2muchTruk
I have a local salvage yard that says they have a 351 with tranny for $1000 (61,000 miles). Do you know if that setup will bolt on as is or do you think I will have to weld up new mounts?
Post Fiend
Joined: Dec 2005
Posts: 6,110
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well, i personnly wouldn't, if its that big of a concern, then trade it in on an older PSD, but if thats not pratical then it still isn't near costs effective to do a swap.
i owned a 1995 f350 and got a constant 10 mpg out of it, i had 35inch tires, k&n filter, high flow cat, and flowmaster muffler. but that was the best i expected and got.
even if your engine is up for a rebuild, it still is more cost effective to rebuild it then get another used smaller engine due to the fact of not knowing the history and plus having to maybe rebuild it sooner than expected, plus its still cheaper to rebuild the 460 vs buying another engine and doing the swap.
so...overall, my opinon is not to bother with the swap, not cost effective in trying to save money on gas.
i owned a 1995 f350 and got a constant 10 mpg out of it, i had 35inch tires, k&n filter, high flow cat, and flowmaster muffler. but that was the best i expected and got.
even if your engine is up for a rebuild, it still is more cost effective to rebuild it then get another used smaller engine due to the fact of not knowing the history and plus having to maybe rebuild it sooner than expected, plus its still cheaper to rebuild the 460 vs buying another engine and doing the swap.
so...overall, my opinon is not to bother with the swap, not cost effective in trying to save money on gas.
