MikeS

I need more power so I was thinking I could replace my 4.6L with a 5.4L. I have a 1997 f-150 4X4. Has this been done before?

05 super

i'm sure it's been done. the 5.4 was an optional engine in that truck. probably going to be expensive and time consuming, assuming you have the engine and computer around. you may want to swap your diff gears. this won't give you more power but the truck will be quicker off the line.

obusnizzle

just swap the motor. It wont be expensive or time consuming and you dont need to screw with the wiring harness, just get a chip for the 5.4 motor.

blackbetty

ive heard its rumored that the heads and harness are the same on the 5.4 as the 4.6....mounts are the same...modular ftw....swap shortblocks and enjoy

MikeS

Do I need to swap the transmission too or will the 4.6 work?

kaboom10

There's more performance parts available for the 4.6L than the 5.4L. I've got a 5.4L and it's frustrating trying to get what I want. They offered 2 transmissions (forgot what they're called but the 100 is the stronger). Swapping in the Navigator 00-03 4v 5.4L will give you the highest hp swap but get it as a whole package.

Triton v8

Turbo The 4.6.............lol

obusnizzle

there is no difference between the heads on the 5.4 and 4.6. The difference is in the block, the stoke is different.

It makes me wonder, I have posted a hyperlink about four times that explains the history of the 2V and 4V motors, including build differences, Im starting to think that no one ever bothers to read it.

kaboom10

I'm new here and never saw it. If you don't mind I would like to see it. I'm trying to get up all the info I can before doing anything stupid that doesn't work and wastes money.

blackbetty

lightning swap it!