3 valve head swap?

ADRENLN

Active Member

Apr 16, 2003

2,342

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49

NJ

Dec 19, 2004

#1

• Dec 19, 2004

• #1

is this possible? on the 99 up gt? can we put the 05 gt heads on.

what about the 4 valve head conversion, what else has to be changed?

would this be a wise mod, or should i stick to the 2 valve heads? im just looking to make the most power i can. i am going to do p& p heads in the spring(2 valve), but if im going to waste the money, i was wondering a bout other possabilities that might make more power. just as far as the heads, i know i can buy a blower or cams(that comes later) im just trying to get the best heads set up right now.. what do you guys think?

 

tomustang

Psychotic Member

Founding Member

Jun 8, 2000

3,434

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McLean Hospital

Dec 19, 2004

#2

• Dec 19, 2004

• #2

i dont know about the 3 valve but people put 4 valves on there blocks. it's very expensive since you have to get a whole new upper end.

 

B

bdcardinal

tree hugger

Jun 10, 2003

3,612

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69

santa barbara, CA

Dec 19, 2004

#3

• Dec 19, 2004

• #3

theoretically the 3v heads should bolt up to the other blocks. you would need a new timing cover and the matching intake manifold. also you wouldnt have the Variable Cam Timing, unless you bought that system as well. if you are going through the trouble of doing a 4v swap i would highly suggest not just bolting the heads on your motor, the compustion chamber is larger and you will lose a ton of compression. i would suggest if you decide to do the 4v swap, to build up a motor out of the car and swap motors. there will be less hassle.

 

DBMSTNG

I fantasize about it being BIG!

Founding Member

Apr 23, 2002

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not quite here

Dec 19, 2004

#4

• Dec 19, 2004

• #4

either way, you'd be better off just buying a complete 3V or 4V engine.

 

nickthegenius

Active Member

Dec 23, 2002

1,631

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Elwood, IN

Dec 19, 2004

#5

• Dec 19, 2004

• #5

There is a guy that they were talking about on Modular Depot that has been running a 3V setup in a Mustang for about a year. However, its a 5.4L. Evidently he is a Ford engineer or something. I can't find the thread or I'd post a link to it.

 

FallenPhoenix

New Member

Nov 22, 2003

911

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Odessa Tx

Dec 19, 2004

#6

• Dec 19, 2004

• #6

I'd bet it won't be too long until someone offers a 2v to 3v swap kit, at least I'd think it would be a good idea

 

ADRENLN

Active Member

Apr 16, 2003

2,342

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49

NJ

Dec 19, 2004

#7

• Dec 19, 2004

• #7

thakns guys, it sounds like more trouble then its worth. i think i will stick to the 2 valve, and work with this. this is going to be enough trouble just working with the 2 valve. besides i suppose i can make enough power out of this. i just was in fear of getting fox 2 valve heads, then right after hearing that it is simple to throw the 3 valve heads on and they are making awsome hp. id be so pissed. i think i will wait it out as long as i can to find out if the 3 valve heads make any power on 99 up gt, and if its hard to do. if its not worth it or cant be done, i will just get ported 2 valves.