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03-19-2010, 12:28 PM
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#1
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senior duck tape mechanic
Join Date: Sep 2009
Location: maine
Posts: 1,507
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mustang 5.0 ho upper intake and gt40 heads
This summer I am planning on doing my hole intake from the mustang 5.0 HO and gt40 heads.
I have a few questions, suggestions welcome to
Would i have to change my truck so it uses a mass airflow meeter for the heads and the intake to work right or could it work with out it?
also what year explorer had the gt40 heads or mustangs?
has any one changed to gt40 heads?
__________________
1988 toyota, 22re, 4x4, strait piped, roll bar
my old 1992 ford F150 31 inch bfg's flowmaster super 44 muffler. soon to come, 2 inch lift
Last edited by shawnsf150; 03-19-2010 at 12:31 PM.
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03-19-2010, 07:58 PM
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#2
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Member
Join Date: Jul 2009
Posts: 88
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You might be ok with the MAP, a MAF comes into play when you start changing rockers and cam.
GT40 heads are on 96-97.5 Explorers/Mountaineers I believe and GT40p's in the latter years. I picked up some heads at my local junkyard for $90 w/o a core.
I did a GT40p, Explorer intake swap on my Mustang.
Also, the Explorer intake will flow better than the Mustang one, if you can get a hold of one for a decent price.
Last edited by Blown_Tranny; 03-19-2010 at 08:11 PM.
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03-19-2010, 09:25 PM
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#3
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senior duck tape mechanic
Join Date: Sep 2009
Location: maine
Posts: 1,507
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so are there any diferences between the reg gt40 and gt40p?
__________________
1988 toyota, 22re, 4x4, strait piped, roll bar
my old 1992 ford F150 31 inch bfg's flowmaster super 44 muffler. soon to come, 2 inch lift
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03-20-2010, 01:30 AM
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#4
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Member
Join Date: Jul 2009
Posts: 88
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Biggest difference is the spark plug angle. The gt40p's angle is closer to 90 while the gt40's are angled more, like the stock Mustang heads. As far as performance, I've heard it debated to death and still haven't seen anything solid. I went with the p's since that is what I found at the junkyard. Biggest thing is to make sure the exhaust fits around the plugs, or at least gives you easy access.
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03-20-2010, 08:59 PM
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#5
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senior duck tape mechanic
Join Date: Sep 2009
Location: maine
Posts: 1,507
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i think im just going to put the mustang intake in from an HO or if i find a explorer i will take it off that, and later on in the future i will get heads.
__________________
1988 toyota, 22re, 4x4, strait piped, roll bar
my old 1992 ford F150 31 inch bfg's flowmaster super 44 muffler. soon to come, 2 inch lift
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03-20-2010, 10:05 PM
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#6
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Senior Member
Join Date: Jun 2009
Location: Central NJ
Posts: 930
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Use a truck maf intake. They flow better than the mustang. Also the mustang hp lowers are based on a truck lower. Switching to maf would allow you to make mods and get better performance.
__________________
"A Ford is a truck. Everything else is just a glorified tonka toy"
"92 F150 Supercab longbed - a rarity amongst supercabs-, 4x4, 302, unfortunately only an auto,
"If ya cant put a big block in it, its not wort having"
91 Ranger 4x2 supercab 5spd 245cid
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03-21-2010, 08:47 PM
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#7
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senior duck tape mechanic
Join Date: Sep 2009
Location: maine
Posts: 1,507
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but then i would have to change the computer and get an air meter, and what ever els it needs for maf. Im just doing the uper intake than mabey put the gt40 heads in later.
__________________
1988 toyota, 22re, 4x4, strait piped, roll bar
my old 1992 ford F150 31 inch bfg's flowmaster super 44 muffler. soon to come, 2 inch lift
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