2valve head swap
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2valve head swap
hey everyone,
i was talking to a buddy the other day and he had mentioned that if the 5.4 would have 4 valve heads it would run like a raped ape.. the way he worded it was that this motor only having 2 valves sufficates it. has anyone made a swap to 4 valve heads.. how much other swapping would be involved.. and would it really make enough of a difference to make it worth while?
thank you for any input
i was talking to a buddy the other day and he had mentioned that if the 5.4 would have 4 valve heads it would run like a raped ape.. the way he worded it was that this motor only having 2 valves sufficates it. has anyone made a swap to 4 valve heads.. how much other swapping would be involved.. and would it really make enough of a difference to make it worth while?
thank you for any input
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sorry I wasn't very specific.. is there a motor that has 4 valve heads that bolts on to the 5.4 block? Maybe something I can find on ebay or at a junk yard and have cleaned up.. where do you guys get p&p done? Iv sent my motorcycle head out but didn't ever think to have the heads on my truck done
Postmaster
Joined: Oct 2006
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From: SE Texas
sorry I wasn't very specific.. is there a motor that has 4 valve heads that bolts on to the 5.4 block? Maybe something I can find on ebay or at a junk yard and have cleaned up.. where do you guys get p&p done? Iv sent my motorcycle head out but didn't ever think to have the heads on my truck done
They do run much better than their 2v counterparts.
It's not just as simple as "bolting on" the heads. There are MANY other parts that you'll need. As for the comment your friend made about the 2V heads suffocating the engine-it's more the intake than the heads.
JL
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From: painesville
98-02 navi motors are 5.4l 4v motors from the factory, they usually sell on e-bay for 1300-2000...but i know its not an easy swap, very cool, but labor and cost intensive. for under 2k you can snag a set of trick flow heads that will out perform a factory 4v. Im a mustang guy (for the most part) and im not sure what you would do for an intake choice that makes any type of power over 5k. any RPM less than that a stock PI head will outperform it. IMHO a head swap is not the most cost effective mod on a truck, much MUCH better off spending that money looking for a lightning swap or a kenne bell blower, you will see 3-4 fold the power gains that can be had from head work with a a$$load more low end tq
Post Fiend
Joined: Jan 2007
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From: Stanton DE
sorry I wasn't very specific.. is there a motor that has 4 valve heads that bolts on to the 5.4 block? Maybe something I can find on ebay or at a junk yard and have cleaned up.. where do you guys get p&p done? Iv sent my motorcycle head out but didn't ever think to have the heads on my truck done
that's what I thought you were talking about.
A good port job is about $1900. Got mine done at TEA (Total Engine Airflow) They do nice work.
For the 4V swap you would need the heads , 4 cams, valve covers , timing chain cover , intake manifold. All the gaskets ,and I'm not sure how the tuning would work out on that. But probably another 500 bucks for tuning.
So if you compare the prices of them , you can see what I'm talking about.
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Joined: Oct 2006
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From: SE Texas
Yeah,
that's what I thought you were talking about.
A good port job is about $1900. Got mine done at TEA (Total Engine Airflow) They do nice work.
For the 4V swap you would need the heads , 4 cams, valve covers , timing chain cover. All the gaskets ,and I'm not sure how the tuning would work out on that. But probably another 500 bucks for tuning.
So if you compare the prices of them , you can see what I'm talking about.
that's what I thought you were talking about.
A good port job is about $1900. Got mine done at TEA (Total Engine Airflow) They do nice work.
For the 4V swap you would need the heads , 4 cams, valve covers , timing chain cover. All the gaskets ,and I'm not sure how the tuning would work out on that. But probably another 500 bucks for tuning.
So if you compare the prices of them , you can see what I'm talking about.
JL
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Post Fiend
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From: Stanton DE
left that out.
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Postmaster
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From: SE Texas
Then you have to solve the intake manifold problem.
JL
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From: Iowa
You are correct johnny. Supposed to and does are 2 totally different things.
Can you bring any light to the debate of if they do or not flow as good as advertised?
Also is there any aftermarket intake that will give the desired results of more power throughout the power band?
Can you bring any light to the debate of if they do or not flow as good as advertised?
Also is there any aftermarket intake that will give the desired results of more power throughout the power band?
Postmaster
Joined: Oct 2006
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From: SE Texas
You are correct johnny. Supposed to and does are 2 totally different things.
Can you bring any light to the debate of if they do or not flow as good as advertised?
Also is there any aftermarket intake that will give the desired results of more power throughout the power band?
Can you bring any light to the debate of if they do or not flow as good as advertised?
Also is there any aftermarket intake that will give the desired results of more power throughout the power band?
You and everybody else here have TRUCKS.
NOT Mustangs, or other cars.
Those heads will work well for what they're intended to be used for:
A lightweight car that revs the engine to FAR beyond what a truck owner will. A street or Strip car that's made to rev high and accelerate quickly without alot of extra weight.
There is NOT a good intake manifold solution that will retain the characteristics of a truck engine and still flow well enough to support those heads. In the operating range of the stock truck intake, those heads will most likely make LESS power than stock heads will. But, if the intake were to allow those heads to breather where they are most efficient-they would make more power than stock heads do.
JL
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Joined: Feb 2002
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I looked at a few Navigators with those motors. Most that I found in my price range were at least 100k miles. ALL of 'em made a good amount of noise, I even posted a question about it here. Sounded like the cam phasers were an issue after a while. Just wanted to throw that out in case this turned into a mass buy up of those powerplants
I did catch gonemad347's post...
I did catch gonemad347's post...