Need more beef
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Joined: Sep 2006
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Need more beef
I have a 1998 ford f-150 xlt, with a 4.6L and a 5 speed manual. i want to swap out the 4.6 with a 5.4 (300hp model) from the 06's. now im looking ata motor from an 06 with low kms. what will i need to make this happen?
bell housing? computer? what else will i need.
bell housing? computer? what else will i need.
Post Fiend
Joined: Aug 2006
Posts: 20,099
Likes: 7
From: Yorkton Sask
about 10-12g's should be a good start. this isn't the old days anymore when you could swap a 302 for a 351 in a weekend... the 5.4 hasn't ever been mated to the 5spd manual in my knowledge, so right off you need to get an auto tranny. one idea would be to find a salvage truck with the powertrain intact, and the proper harnesses,computer, etc. best thing to do...??? supercharge what you have...
sherm
sherm
5th Wheeling
Joined: Jan 2007
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Originally Posted by big_tuff
I have a 1998 ford f-150 xlt, with a 4.6L and a 5 speed manual. i want to swap out the 4.6 with a 5.4 (300hp model) from the 06's. now im looking ata motor from an 06 with low kms. what will i need to make this happen?
bell housing? computer? what else will i need.
bell housing? computer? what else will i need.
If your determined to do the 3V then the best advice is to get a donor vehicle, you will have to worry with changing computers (if you want the variable cam timing to work) different radiator/ thermostat locations etc. The one thing you won’t have to worry about is the bellhousing its the same size on 4.6s and 5.4s.
5th Wheeling
Joined: Jan 2007
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Originally Posted by 96sherm
about 10-12g's should be a good start. this isn't the old days anymore when you could swap a 302 for a 351 in a weekend... the 5.4 hasn't ever been mated to the 5spd manual in my knowledge, so right off you need to get an auto tranny. one idea would be to find a salvage truck with the powertrain intact, and the proper harnesses,computer, etc. best thing to do...??? supercharge what you have...
sherm
sherm
I doubt that it would be that much, I know that it wouldn't be for the 99-04 swap if you have someone reputable do it. I swapped an 03 4V 4.6 into my mustang for 3500 including the price of the engine and the dyno tune.
Postmaster
Joined: Nov 2006
Posts: 4,517
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From: SE Wyoming
I don't think $10K+ is out of the question at all it will take quite a bit of custom work, I think it would be far easier to put 3V heads on a 2V PI engine and custom fab from that. If you want a manual tranny the SD 6spd will bolt up but there may be clearance issues with the floor. It would also be easier to just put a 305hp DOHC Navi engine in.
Posting Guru
Joined: Nov 2004
Posts: 1,628
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From: Northeast Nebraska
Id just get the 4.6 beefed up and add a super charger.
96Sherm: The 5.4 was bolted to a 5sp in the Super Duty's. Im not sure if thats the same tranny the 4.6's use in the F-150's. Maybe the swap wouldnt be so bad if you had a 5.4 Super Duty to get parts from? Just a thought.
96Sherm: The 5.4 was bolted to a 5sp in the Super Duty's. Im not sure if thats the same tranny the 4.6's use in the F-150's. Maybe the swap wouldnt be so bad if you had a 5.4 Super Duty to get parts from? Just a thought.
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Posting Guru
Joined: Apr 2004
Posts: 1,921
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From: central TX
Not the same tranny. The 5 spd. used in the 1/2 tons is not very strong. I wouldn't put a supercharged 4.6 or even a mildly modified 5.4 in front of it. It can live if you go easy on it (like that will happen with someone who is looking for the power), but what's the point. Get a different tranny if you want to add any significant power.
That's why it depends on what he's looking for. If he wants to take this thing down the strip once in a while, the Superduty 5 spd is likely the wrong tranny too.
That's why it depends on what he's looking for. If he wants to take this thing down the strip once in a while, the Superduty 5 spd is likely the wrong tranny too.
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5th Wheeling
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Originally Posted by galaxie641
I don't think $10K+ is out of the question at all it will take quite a bit of custom work, I think it would be far easier to put 3V heads on a 2V PI engine and custom fab from that. If you want a manual tranny the SD 6spd will bolt up but there may be clearance issues with the floor. It would also be easier to just put a 305hp DOHC Navi engine in.
The 3V head on a stock 2V short block is impossible. The pistons aren't clearanced for the valves. A warmed over two valve is capable of just as much or more power than a stock 3V. I have a weaknss for the 4Vs and I like your navi suggestion.