5.4 block with 4.6 heads?

Reply Subscribe

Thread Tools

Search this Thread

10-13-2009, 01:34 AM

Lance9386

1st Gear Member

Thread Starter

Join Date: Mar 2007

Location:

Posts: 108

5.4 block with 4.6 heads?

2007 Mustang GT 4.6 Hellion turbo kit 62mm turbo 39 lb injectors dual cobra fuel pumps

I am looking into purchasing a built 5.4 block and turning up my boost! Could I use my 4.6 heads with this and still gain considerable power? I make 500rwhp the way the car sits now with stock motor and hellion turbo kit. Not very knowledable when it comes to building motors. Chime in and educate me please!!

--Just noticed I posted in the wrong section..sorry!!

Last edited by Lance9386; 10-13-2009 at 01:36 AM. Reason: wrong area

10-13-2009, 05:18 PM

dimebag

6th Gear Member

Join Date: May 2006

Location: earleville md

Posts: 10,357

Yes you can. And its ok we have a good bit of 5.4 knowlege in here. But yup simple answer is yes u can, because the heads are the same ne way

10-13-2009, 05:54 PM

pcs

4th Gear Member

Join Date: Jan 2008

Location: yuma, az

Posts: 1,252

you have to get a 3v 5.4 block
you can swap 4.6 2v/4v heads on a similar 5.4 block but not 3v heads

10-13-2009, 07:49 PM

dimebag

6th Gear Member

Join Date: May 2006

Location: earleville md

Posts: 10,357

Why not?

10-13-2009, 08:17 PM

GeritGoul

3rd Gear Member

Join Date: Oct 2008

Location: Texas

Posts: 568

the 5.4 will just sit right in the engine bay? no modifications? ?

10-13-2009, 08:42 PM

4.698GT

4th Gear Member

Join Date: Jan 2005

Location: Port Monmouth, New Jersey

Posts: 1,984

modifications to the exhaust will be needed and if you opt out of the s197 throttle, there will be some tinkering there.

10-13-2009, 08:48 PM

Sxynerd

6th Gear Member

Join Date: Feb 2006

Location: Virginia

Posts: 11,786

The 5.4 has the same crap internals as the 4.6 and if you install the 5.4 you better have some amazing heads to go on it cause you're going to run out of air for any real RPM's and boost. Why don't you spend some time searching the site on your topic. Everything you need to know has already been said.

10-13-2009, 09:13 PM

Fobra

Banned

Join Date: May 2007

Location:

Posts: 4,064

Quote:

Originally Posted by pcs

you have to get a 3v 5.4 block
you can swap 4.6 2v/4v heads on a similar 5.4 block but not 3v heads

3v heads are a straight swap. Just make sure you buy an 03+ "NVH" 5.4 block, not that you really HAVE to, but its a stronger block and will run quieter.