So everybody whats up with the GT40 heads, they better then the 99+GT's?

96_4.6 · 09-20-2002, 09:15 PM

There in the summit catalog, they are listed as flowing better then GT heads and there kinda cheap, $279 i believe, i bet they charge a fortune to swap heads at a shop, what do you guys think?

Hammer · 09-20-2002, 10:38 PM

GT 40 heads are for 302\5.0s....

Your options are:
1. 99+ PI heads
2. Ford Motorsport heads

96_4.6 · 09-22-2002, 04:05 PM

It says it fits 289\302\351 Winsor so they must, there "P" GT40 heads

The Deuce · 09-22-2002, 04:27 PM

Quote:

289\302\351 Winsor

That is a overhead valve motor. The 289 was stock in '65 and they ran some variation of that block, until 1995. Windsor is the name of the plant where the engine was originally built (or designed) as opposed to Cleveland, where the 'hot' big block style 351 originated.

Your car is an overhead cam motor. It is 281 cubic inches, and the heads will not fit if you buy them. They have no cam in them to move the valves.

fiveohpatrol · 09-23-2002, 10:39 PM

another option you have is the Fox Lake ported PI (99-up) heads.

theres a writeup on them in the oct 02 5.0 magazine, and they seem like an awesome set of heads.

They see 35rwhp gains over a mostly stock car with the unported PI heads, and as much as 70rwhp on a car with free flowing exhaust and intake.

Looks like you modular guys are starting to finally get some strong aftermarket support like us in the old 5.0 crowd

Titan · 09-23-2002, 10:58 PM

I read that article...it's really interesting. Fox has stage I, II, and III heads. They look like they'd give significant gains.

Anybody know what the compression would be w/ fox heads? As bad as the 99+??? The fox heads for the 302 start base at $995, the upgraded version is only $100 more. But, this is only the heads--no intake, as w/ the 99+ PI kits. If the c/r is less, you may eventually save money on gas...but looks like the 99+ kit is the better deal.

--Yes, I know we modulars don't have 302's, but they don't have a 4.6L price, or not one that I saw.

--Another side note, they say the average 302-347ci motor w/ basic bolt-ons (no power adders) averaged b/w 350-450 hp w/ these heads. Don't know if that's flywheel or rearwheel, but it seems like quite a bit...

96_4.6 · 09-24-2002, 12:32 AM

I wonder how much it'd cost for the 96 to 99+ head swap??? Anyone know??

Titan · 09-24-2002, 12:35 AM

They had a site a few weeks ago that showed if for just over 1k. That's the best--by far--anybody's seen. Search for it, you may find it in the archives.

09-20-2002, 09:15 PM	#1
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	So everybody whats up with the GT40 heads, they better then the 99+GT's? There in the summit catalog, they are listed as flowing better then GT heads and there kinda cheap, $279 i believe, i bet they charge a fortune to swap heads at a shop, what do you guys think? __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

09-20-2002, 10:38 PM	#2
Hammer AKA "Dr. Evil" Join Date: Feb 1999 Location: South Fork Ranch Posts: 1,721	GT 40 heads are for 302\5.0s.... Your options are: 1. 99+ PI heads 2. Ford Motorsport heads __________________ Uncle Sam "What the hell is up with all the gauges? Calling Captain Kirk, your ride awaits... Phasers on stun...."

09-22-2002, 04:05 PM	#3
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	It says it fits 289\302\351 Winsor so they must, there "P" GT40 heads __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

09-23-2002, 10:39 PM	#5
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	another option you have is the Fox Lake ported PI (99-up) heads. theres a writeup on them in the oct 02 5.0 magazine, and they seem like an awesome set of heads. They see 35rwhp gains over a mostly stock car with the unported PI heads, and as much as 70rwhp on a car with free flowing exhaust and intake. Looks like you modular guys are starting to finally get some strong aftermarket support like us in the old 5.0 crowd __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

09-23-2002, 10:58 PM	#6
Titan Registered Member Join Date: Jul 2002 Location: Atlanta Posts: 296	I read that article...it's really interesting. Fox has stage I, II, and III heads. They look like they'd give significant gains. Anybody know what the compression would be w/ fox heads? As bad as the 99+??? The fox heads for the 302 start base at $995, the upgraded version is only $100 more. But, this is only the heads--no intake, as w/ the 99+ PI kits. If the c/r is less, you may eventually save money on gas...but looks like the 99+ kit is the better deal. --Yes, I know we modulars don't have 302's, but they don't have a 4.6L price, or not one that I saw. --Another side note, they say the average 302-347ci motor w/ basic bolt-ons (no power adders) averaged b/w 350-450 hp w/ these heads. Don't know if that's flywheel or rearwheel, but it seems like quite a bit... __________________ Current Sophomore -- Mechanical Engineering Black on Black 98' GT 5-Speed Mods = Stuff

09-24-2002, 12:32 AM	#7
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	I wonder how much it'd cost for the 96 to 99+ head swap??? Anyone know?? __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

09-24-2002, 12:35 AM	#8
Titan Registered Member Join Date: Jul 2002 Location: Atlanta Posts: 296	They had a site a few weeks ago that showed if for just over 1k. That's the best--by far--anybody's seen. Search for it, you may find it in the archives. __________________ Current Sophomore -- Mechanical Engineering Black on Black 98' GT 5-Speed Mods = Stuff

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