Can you get a 5.4 shortblock from a F150 and put 4valve heads on? Or if you wanted to swap a 5.4 4v does it HAVE to be a navigator long block? In other words what 5.4 shortblocks could you use to piece together a 5.4 4V?
5.4.. 4v n/a?
- Thread starter 2001SVTsnake
- Start date
You can use it, but you will want flat top pistons,
I think the 2V is dished.
The 4.6 flat tops will go right on.
Flat tops in a 5.4 32V is 9.65:1 CR, good for mild street,
or if forged, good for FI.
Stock rods are powdered metal in the 5.4 (except lightning).
You will also need a Navi timing cover.
I think the 2V is dished.
The 4.6 flat tops will go right on.
Flat tops in a 5.4 32V is 9.65:1 CR, good for mild street,
or if forged, good for FI.
Stock rods are powdered metal in the 5.4 (except lightning).
You will also need a Navi timing cover.
awesome thanks bud. I've found some local 5.4 SOHC shortblocks with low miles for cheap. Just wondering if I could convert it to DOHC with 03-04 heads
Cool.
Manley rods for a 5.4 are longer than a 4.6,
but about the same price.
Same flat top pistons as a 4.6, 03-04 heads, timing components,etc.
Oil pump (FRPP HV) goes right on along with the pickup. (bolt on)
AC, PS, etc bolt right to the block.
Bellhousing is the same, same 8 bolt flywheel, clutch, etc.
I am aware of one person on another board doing this swap
on a GT with a 6k budget, including everything. (Including the Aussie-US stuff)
He will end up beating his budget (on the GOOD side) by a decent margin.
Manley rods for a 5.4 are longer than a 4.6,
but about the same price.
Same flat top pistons as a 4.6, 03-04 heads, timing components,etc.
Oil pump (FRPP HV) goes right on along with the pickup. (bolt on)
AC, PS, etc bolt right to the block.
Bellhousing is the same, same 8 bolt flywheel, clutch, etc.
I am aware of one person on another board doing this swap
on a GT with a 6k budget, including everything. (Including the Aussie-US stuff)
He will end up beating his budget (on the GOOD side) by a decent margin.
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Any reason I should try this instead of a BB/stroker? How would that Aussie intake work with my FR500 cams?
Block strength is a plus for the 5.4 (iron)
Weight maybe a neg over the aluminum 4.6
You really don't feel the weight of it.
Mine does not feel nose heavy,
and the 00 "R" guys don't complain about it.
With the Aussie intake, I think the FR500 cams' torque would be unreal.
Heck with the stock 04 navi cams, it pulls like a freight train.
Lots of grunt.
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I'm not building for a while, but I will be talking about this more. I'm starting to not worry about the weight so much. Besides, I'd probably want the Boss block, iron, anyway. My goals are only 450-475 rwhp with over 400 ftlbs of torque, which I don't think will be too much of a problem. Really the intake and teh headers are the main issues I see. I do hate wiring, so that part would SUCK. Just curious right now.
If you have a Mach 1 or Cobra, you already have the wiring.
exhaust is simple and now so is the intake.
Boss block is 4.6./5.0
My new design upper in a new Edge.
Now the 5.4 32V bolts right in.
A 99-01 Cobra or a Mach it's so easy you wouldn't believe it.
I spent 3.5 years developing this.
this is awsome i plan on doing this swap on my 99 cobra with 220,000 mi .
It's fun having torque AND RPM's.
Did I mention torque?
Easy to work on for the most part,
and no special replacement parts if/when you need them,
IE PS & AC hoses, cooling hoses, etc.
Use what you already have. (NA Cobras and Mach 1's)
Did I mention torque?
Easy to work on for the most part,
and no special replacement parts if/when you need them,
IE PS & AC hoses, cooling hoses, etc.
Use what you already have. (NA Cobras and Mach 1's)
I have a Cobra, but I could have sworn I had to modify the harness somewhere :shrug:
The Boss block is only 5.0 liters if you use the stock crank
I have a Cobra, but I could have sworn I had to modify the harness somewhere :shrug:
The Boss block is only 5.0 liters if you use the stock crank
Moving wire stays are about the only wire mods with the kit.
Cobra harness including knock sensors go right on the 5.4.
I am aware of the 5.0 block, and obviously the Aussie intake won't fit that.
The good thing about the 5.0 block is it looks like a 4.6.
The bad thing about the 5.0 block is it looks like a 4.6.
The 5.4 32V is wall to wall motor, like a modern day Boss 429.
Both are better than the 4.6 though IMHO.
The 5.4 is a more stable setup. No way would a BB/stroker pass Ford OEM durability testing.
Good to know about the harness. I suck at wiring.
Really what I'm curious about is how differnet the motors characteristics are. But, I doubt there are many out there that have had both a built 5.4 and a BB/stroker. Cost wise, I don't think it would be too different.
Really what I'm curious about is how differnet the motors characteristics are. But, I doubt there are many out there that have had both a built 5.4 and a BB/stroker. Cost wise, I don't think it would be too different.
I would tend to agree.
The iron cammer 5.0 block and the 5.4 NVH block weights are about the same,
and the NVH block costs a lot less.
The 5.4 crank is 350 or so, where a Cobra crank is twice that,
and a stroker crank, I don't know.
Mine has a slightly modded (20 minutes tops) Mach 1 harness,
which is a kissing cousin to a 99/01 Cobra harness.
I think the 5.4 cost would be a bit less.
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At that point the car won't be a DD anyway. But, I'm not sure it would be an issue anyway. That Boss block is stout.
Probably a lot of side loading on a BB stroker block though.
It will work though, I'm sure.
Only issue there is going to be the intake.
Unless you can get your hands on an FR500 intake,
the Mach/NA Cobra intake, even ported,
might strain to feed the displacement.
Check my sig, it's not a problem :coolman:
You would have to check with Carlos on that one.
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