4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

sick of 4.6.. is there a 5.4 engin swap?

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Old 08-23-2009, 07:31 PM
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freeman62
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Default sick of 4.6.. is there a 5.4 engin swap?

ive grown tired of my 4.6 and the problems i am constantly confronted with is there or does any one make a wiring harness conversion kit and can i run the factory 5 speed in my 2000 gt with the 5.4 if there is such a swap any help would be appreciated
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Old 08-23-2009, 07:39 PM
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dimebag
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Switches right over, use ur harness and just swap motors, goes right in. You need an intake tho
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Old 08-23-2009, 08:53 PM
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freeman62
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sweet are the sensors in the intake different or will the intake just not clear the hood? and do i need to get new motor mounts?

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Old 08-23-2009, 09:24 PM
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WhiteFoxGT
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What makes you think the 5.4 is problem free? It is basically the same unit as the 4.6.. And share the same common issues. A 5.4 will gain you some torque, but you lose the ability to rev it.. And when you try to put a hot set of cams on ported heads you cant gain because you cant rev to 7000 rpms on a stock 5.4 rotating assembly.
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Old 08-23-2009, 09:38 PM
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dimebag
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this is very true
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Old 08-23-2009, 10:44 PM
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the 4.6 and the 5.4 are the same only difference is a taller deck hence a longer stroke. The only thing about doing a 5.4 swap is the fact its "cool" In all honesty I have thought about doing it but it just doesnt seem feasable.
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Old 08-24-2009, 10:35 AM
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liljojo4711
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if u are swapping anyway, do the 5.4 its just as easy. use ur stock intake and heads and u are pushing 260hp and 340tq vs. 260hp and 300tq... makes sense

this has all the info u will ever need
http://mustangboards.com/modular-4-6...tml#post425361
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Old 08-24-2009, 10:49 AM
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WhiteFoxGT
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Yea, makes sense if you plan to not mod it at all...

Long tubes? forget about it

stock hood? nope

stage 2 cams? better build a nice rotating assembly first. Spin that 5.4 past 6k a few times and tell me how it makes out
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Old 08-24-2009, 02:32 PM
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liljojo4711
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Originally Posted by WhiteFoxGT
Yea, makes sense if you plan to not mod it at all...

Long tubes? forget about it

stock hood? nope

stage 2 cams? better build a nice rotating assembly first. Spin that 5.4 past 6k a few times and tell me how it makes out
they make long tubes now, they are $1100...

if u use the hps intake everything fits under the stock hood with minor cutting on the bottom...

most people doing a swap will upgrade to forged internals and if not then they wont be getting cams...

there is not downside to doing the swap IMO unless u need high top end speed
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Old 08-24-2009, 04:21 PM
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WhiteFoxGT
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Now your talkin huge money, just to say you have a 5.4 under the hood. A built 4.6 seems to make much more sense now
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