GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Swapping out the 4.6 for a 428 cobra jet?

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Old Apr 10, 2008 | 04:13 PM
  #1  
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Swapping out the 4.6 for a 428 cobra jet?

Lol i know it sounds crazy. But i've got to thinking lately, do I really wanna spend 4500+ on a blower and the cost of install or should I just wait till my warranty expires and rip out the 4.6 and swap it for a 428. I could sell the 4.6 and put it towards the 428, but how hard do you all think it would be to do? but dear god could you imagine how sweet it would be ...

Last edited by mooneyb; Apr 10, 2008 at 04:15 PM.
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Old Apr 10, 2008 | 04:15 PM
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the 4.6 will be faster, much faster.
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Old Apr 10, 2008 | 04:16 PM
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Really? The crate 428's i've been looking at are 520+hp
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Old Apr 10, 2008 | 04:16 PM
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Really? The crate 428's i've been looking at are 520+hp

Last edited by mooneyb; Apr 10, 2008 at 04:17 PM. Reason: crappy connection at school double post
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Old Apr 10, 2008 | 04:21 PM
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It's your ride.... personalize it!
so far I've seen a 302, a 427sohc and a 429 in a S197. Seen a 351 K member for a S197 somewhere but haven't seen a 351 in one yet. If you got to have the fastest one a nitro burning Chrysler under a funny car body should do.
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Old Apr 10, 2008 | 04:22 PM
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It would end up costing too much money (for me anyway), you would have to swap out the entire drivetrain for one that can be used with that engine, and modify it to fit your car.
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Old Apr 10, 2008 | 04:26 PM
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Originally Posted by rakkassan34
It's your ride.... personalize it!
so far I've seen a 302, a 427sohc and a 429 in a S197. Seen a 351 K member for a S197 somewhere but haven't seen a 351 in one yet. If you got to have the fastest one a nitro burning Chrysler under a funny car body should do.
Do you have any links to these cars or info about them?
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Old Apr 10, 2008 | 04:26 PM
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If you do end up doing it, can you take pictures. I want to show my dad because I tried to buy his 428 off him when I first got my 05 and he laughed at me saying it would never fit in the engine bay..
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Old Apr 10, 2008 | 04:48 PM
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It would fit, the 4.6 is a flippin wide engine. In fact I've heard its even wider than the big blocks ford put in stangs in the 60's


here looky

http://www.youtube.com/watch?v=jsKvrfyULhU

Last edited by mooneyb; Apr 10, 2008 at 04:59 PM.
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Old Apr 10, 2008 | 06:18 PM
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If it's even possible, by the time you do it and swap drivetrains, etc. you won't be any further ahead power-wise than a blown 4.6L, as stated in post #2.
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Old Apr 10, 2008 | 06:49 PM
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what u mean i wont be any further ahead power wise look http://www.proformanceunlimited.com/...525HP_AAL.html if i pushed the 4.6 to that it would blow up! the only way i'd be getting that amount of power out of a 4.6 is if i swapped with a terminator from a 03/04 cobra which i've also thought about
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Old Apr 10, 2008 | 06:51 PM
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From: It's tough in the jungle !
Originally Posted by tom281
If it's even possible, by the time you do it and swap drivetrains, etc. you won't be any further ahead power-wise than a blown 4.6L, as stated in post #2.
Well that 525 hp is at the fly wheel, tom281's blown 4.6 is probably close to that right now on stock internals, other than looking cool and some bragging rights, one would be at a loss !

Last edited by blkstang06; Apr 10, 2008 at 06:57 PM.
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Old Apr 10, 2008 | 06:57 PM
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what u mean i wont be any further ahead power wise look http://www.proformanceunlimited.com/...525HP_AAL.html if i pushed the 4.6 to that it would blow up! the only way i'd be getting that amount of power out of a 4.6 is if i swapped with a terminator from a 03/04 cobra which i've also thought about
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Old Apr 10, 2008 | 06:57 PM
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Originally Posted by mooneyb
what u mean i wont be any further ahead power wise look http://www.proformanceunlimited.com/...525HP_AAL.html if i pushed the 4.6 to that it would blow up! the only way i'd be getting that amount of power out of a 4.6 is if i swapped with a terminator from a 03/04 cobra which i've also thought about
The Terminator engine would be a worth while investment and would prolly pass emissions.I got a very quick ride in an 03' Terminator,that thing was god-awful fast.
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Old Apr 10, 2008 | 07:52 PM
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keep in mind the 4.6 is all aluminum and the 428 is cast iron. BIG weight differeence. There goes your handling..
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Old Apr 10, 2008 | 08:00 PM
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http://www.mustang50magazine.com/fea...mmer_s197.html
that's the 427 cammer.

http://www.youtube.com/watch?v=jsKvrfyULhU There's the 429, it may be a 460 I'm not sure

Last edited by rakkassan34; Apr 10, 2008 at 08:14 PM. Reason: new entry
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Old Apr 10, 2008 | 08:13 PM
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There was a 351 windsor S197 on Youtube. A bigblock would be cool but you might wait to see what else is coming out. I know a few who are swapping their V6's for 5.4 3v and 4v.
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Old Apr 11, 2008 | 02:27 AM
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Im sure wiring and tuning would be a pain.
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Old Apr 11, 2008 | 05:29 AM
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Originally Posted by mooneyb
what u mean i wont be any further ahead power wise look http://www.proformanceunlimited.com/...525HP_AAL.html if i pushed the 4.6 to that it would blow up! the only way i'd be getting that amount of power out of a 4.6 is if i swapped with a terminator from a 03/04 cobra which i've also thought about
I would suggest that you do some additional research regarding the 4.6L capabilities.

The wisest thing you've mentioned in this thread is the possibility of using a Terminator setup.

Originally Posted by blkstang06
Well that 525 hp is at the fly wheel, tom281's blown 4.6 is probably close to that right now on stock internals, other than looking cool and some bragging rights, one would be at a loss !
+1.
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Old Apr 11, 2008 | 07:05 AM
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You do realize more than half the people on this forum alone who are driving supercharged mustangs are pushing over 460 to the wheels right? Usually around 8-10psi? On stock internals? Assuming typical drivetrain loss of 15%, thats over 529HP to the crank! Getting more is as simple as a pulley switch. All this for $3500-$6000.

Put in some cams and forged bottom end, and the 4.6 can wreck havoc. Not trying to downplay your idea, but just saying that the 4.6 can put out and handle a lot more power than you may think.
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