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04-14-2008, 10:45 AM
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#1 |
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Junior Member
Join Date: Mar 2008
Location: wellborn
Posts: 17
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mach 1 engine?
I was wondering, is the heads the only differance on a mach1 4.6 and a gt 4.6?
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04-14-2008, 11:08 AM
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#2 |
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Administrator
Join Date: Dec 2004
Location: Huntsville, AL
Posts: 14,774
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No. The intake, cams, exhaust manifolds, and internals are all different. The block may be different as well.
The Mach has a 4V motor and the GT has a 2V. 
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1998 Mustang GT Coupe - World's Slowest Racecar 2005 Toyota 4Runner SR5 V8 2013 Volkswagen Jetta Sportwagen TDI |
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04-14-2008, 08:28 PM
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#3 |
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Junior Member
Join Date: Mar 2008
Location: wellborn
Posts: 17
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so i cant put a set of mach 1 heads on a GT 4.6 block?
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04-15-2008, 12:26 AM
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#4 |
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Senior Member
Join Date: Oct 2006
Location: at your moms
Posts: 407
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you can but you will have to get a wiring harness, computer, intake to say the least. you are better off getting the motor, trans, wiring package all together or to state the obvious buy a mach 1. but if you are worried abou making power the 2v are capable of making alot of power. just a good set of forge internals and a kenne bell blower, you are off making at least 500 rwhp.
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13.068 @ 102 with a 1.732 60 ft, 4:30 gears and drag radials, 2.5 inch exaust, x pipe w/ flowmasters, stock motor and trans |
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04-15-2008, 04:07 PM
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#5 | |
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3v's are slow
Join Date: Dec 2004
Location: Here and There
Posts: 17,152
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Quote:
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04-17-2008, 11:32 AM
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#6 | |
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Senior Member
Join Date: Dec 2006
Location: Birmingham
Posts: 168
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Quote:
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04-17-2008, 11:38 AM
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#7 | |
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Senior Member
Join Date: Dec 2006
Location: Birmingham
Posts: 168
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Quote:
you need heads up parts wise, thats pretty much it heads/intake/tb etc the gt wiring harness can be adapted way easier than replacing it, you just need to lengthen a few wires(the 4v cops need to be reversed) etc but almost everything plugs in, then just get a retune on your computer from doug@bamachips the problem you will run into is the compression, 4v heads have a much larger chamber volume(50-53cc depending on version) than PI heads(42cc) and if you put 4v heads on a 99-04 you will get like 8:1 compression and will be useless, if you put flat tops in it then you will get about 9.8:1 if you put the 4v heads on a Non-PI engine then your compression wont change much and it's not a terrible idea(though more expensive than a pi swap which bumps your compression as well) the problem is everything for 4v heads cost double what it does for 2v's because their are twice as many valves/springs/cams and to make a 2v to 4v swap worth it you need flat top pistons and some real mean cams however for an all out NA application, forged rotating assembly and 8000rpm cams a 4v set up can't be beaten Last edited by sleepinggt; 04-17-2008 at 11:40 AM. |
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