5.4 4v Navigator motor questions - Forums at Modded Mustangs
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post #1 of 22 Old July 13th, 2010, 08:27 PM Thread Starter
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5.4 4v Navigator motor questions

I cant seem to get my mind off this swap.

So i thought id ask a few questions

Doing a 5.4 4V swap, would it just be like swapping a 4v 4.6 in my car?

Also what intake manifolds are available for the (i think C port) 4v heads.

I also heard the navi heads have a larger intake runner and a smaller exhaust runner due to a coolant passage? Is that true?


Whats the weakest part of a 5.4?


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post #2 of 22 Old July 13th, 2010, 08:33 PM
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You have to run a 5.4 intake, its a wider motor and 4.6 stuff wont fit. Sullivan, hogan and others make intakes for them, they are pricey though 700-1000 dollars new

it does drop in, but with the 4v heads on a 5.4 you will be pushed to the max on space.

the exhaust ports arent that bad, they are one of the better stock flowing heads, even coming on a truck. A little pork work REALLY opens these heads up.

The stock motors are pretty stout, I helped put one together in a 99 car and with 10lbs of boost was a beast, people say they will handle 700-800 stock, but until I see it, Im not gonna jump on that one.

Modified right they will make/handle what ever you want them to make.

I want to build one N/A about 11:1 ported heads, good cams, spin it to 7500 should be good for 500ish at the wheels with nothing radical other than the compression ratio

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post #3 of 22 Old July 13th, 2010, 08:51 PM Thread Starter
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So wait.

your saying the bottom end on that car is stronger then the average 4.6?


853rwhp @ 23psi
75mm Turbo 5.4 swap E85
#turbo2v

10.11 @ 138mph STOCK LONGBLOCK
9.20 @ 138 on 16psi - New Longblock /w Powerglide

www.JPCracing.com 410-729-0005 ext. 11

PM me if you need any parts or advice!
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post #4 of 22 Old July 13th, 2010, 09:10 PM
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the car I worked on dynoed 57x but some have said 700-800 it will/can handle. Ive never seen it, does it mean its true or not, I cant say

Just a truck
5.4 3v: 264hp 317ft lbs rock stock

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post #5 of 22 Old July 14th, 2010, 02:28 AM Thread Starter
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Anyone else had any success with these motor or head of success with these motors?


853rwhp @ 23psi
75mm Turbo 5.4 swap E85
#turbo2v

10.11 @ 138mph STOCK LONGBLOCK
9.20 @ 138 on 16psi - New Longblock /w Powerglide

www.JPCracing.com 410-729-0005 ext. 11

PM me if you need any parts or advice!
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post #6 of 22 Old July 14th, 2010, 02:34 AM
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honestly, if you just buy a good intake and throw some good guts inside it, you will make more power than youll know what to do with

Just a truck
5.4 3v: 264hp 317ft lbs rock stock

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piecing together the next project


faster than your first sexual experience
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post #7 of 22 Old July 14th, 2010, 02:37 AM
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the 5.4 dohc is a nice motor when done right, go with a boss290 manifold, 11:1 comp ratio, and some mild cams and you will have a fairly stout NA mod motor.
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post #8 of 22 Old July 14th, 2010, 02:41 AM Thread Starter
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Well going for N/A power is a waste. You can go farther any day with boost.


853rwhp @ 23psi
75mm Turbo 5.4 swap E85
#turbo2v

10.11 @ 138mph STOCK LONGBLOCK
9.20 @ 138 on 16psi - New Longblock /w Powerglide

www.JPCracing.com 410-729-0005 ext. 11

PM me if you need any parts or advice!
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post #9 of 22 Old July 14th, 2010, 02:43 AM
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but the piping gets tricker with that motor in your engine bay, 550 will make you shit your pants, esp with what you have now

Just a truck
5.4 3v: 264hp 317ft lbs rock stock

The "search" button, its not just for porn

piecing together the next project


faster than your first sexual experience
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post #10 of 22 Old July 14th, 2010, 03:19 AM Thread Starter
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Are there any roots style superchargers for that setup?


853rwhp @ 23psi
75mm Turbo 5.4 swap E85
#turbo2v

10.11 @ 138mph STOCK LONGBLOCK
9.20 @ 138 on 16psi - New Longblock /w Powerglide

www.JPCracing.com 410-729-0005 ext. 11

PM me if you need any parts or advice!
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post #11 of 22 Old July 14th, 2010, 03:45 AM
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if you stick with a 2v 5.4 you can look into a lightning blower.
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post #12 of 22 Old July 14th, 2010, 03:46 AM Thread Starter
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Would a GT500 setup work?


853rwhp @ 23psi
75mm Turbo 5.4 swap E85
#turbo2v

10.11 @ 138mph STOCK LONGBLOCK
9.20 @ 138 on 16psi - New Longblock /w Powerglide

www.JPCracing.com 410-729-0005 ext. 11

PM me if you need any parts or advice!
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post #13 of 22 Old July 14th, 2010, 03:50 AM
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I would think so, but it wouldn't be cheap. Better to go wiu a procharger. A pd blower on a 5.4 will not fit under hood, and I know of no one who makes a hood to clear it.

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post #14 of 22 Old July 14th, 2010, 03:51 AM Thread Starter
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Im not too worried about the hood issue.

If worst comes to worst il buy a huge ass cowl hood.

To me the torque of a 5.4+ PD blower = sex.


853rwhp @ 23psi
75mm Turbo 5.4 swap E85
#turbo2v

10.11 @ 138mph STOCK LONGBLOCK
9.20 @ 138 on 16psi - New Longblock /w Powerglide

www.JPCracing.com 410-729-0005 ext. 11

PM me if you need any parts or advice!
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post #15 of 22 Old July 14th, 2010, 04:06 AM
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i just purchased a 5.4 out of 05 f150, any one know if i can drop this in my 02 gt how it is or will i have to change the heads and front dress over to make it all work

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post #16 of 22 Old July 14th, 2010, 04:16 AM
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if its a 3v, you will have to figure out something with the tb, exhaust manifolds, and something with the cams and it should work.
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post #17 of 22 Old July 14th, 2010, 04:23 AM
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yeh it is a 3v it came with jba headers and they stick out like beasts , i think ill swap the 2v heads to it so i could use the 270 cams i have on the shelf

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post #18 of 22 Old July 14th, 2010, 10:53 AM
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Quote:
Originally Posted by superbeef1000 View Post
yeh it is a 3v it came with jba headers and they stick out like beasts , i think ill swap the 2v heads to it so i could use the 270 cams i have on the shelf
then why mess with a 3v motor, the heads way out flow the 2v.

The stock 3v 5.4 is my truck hauls ass in a 5000lb truck, only imagine in a mustang

Just a truck
5.4 3v: 264hp 317ft lbs rock stock

The "search" button, its not just for porn

piecing together the next project


faster than your first sexual experience
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post #19 of 22 Old July 14th, 2010, 11:45 AM
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Keep the 3v, it's a much better choice than a 2v

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post #20 of 22 Old July 14th, 2010, 03:14 PM
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i was thinking to swap the heads because i have all these new parts sitting here and they are all for the 2v heads compbehive springs and comp 270 cams and comp ajustable cam gears so on and plus i dont have all the wire harness for the 3v engine

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