5.4 Heads

The Deuce · 12-07-2002, 07:51 PM

Anybody know how these flow compared to the 99+ 4.6 heads? How about intake/exhaust matching?

I got to thinking, if you can swap heads across Windsor displacements, why not with the cammer motors? Any ideas?

Ares · 12-07-2002, 10:01 PM

They are the same if I'm not mistaken. Besides my car came from factory with one marked for 5.4 Truck and other 4.6 Heavyduty Truck.

MiracleMax · 12-09-2002, 07:48 PM

Yeah PI heads are used on the 4.6 GT's and the 5.4 mod motors.

Anybody up for calling a junkyard and seeing if the dope behind the counter tries to sell you some honest to goodness PI heads for more than 5.4 heads?

The Deuce · 12-10-2002, 12:11 AM

Quote:

Originally posted by MiracleMax
Yeah PI heads are used on the 4.6 GT's and the 5.4 mod motors.

Anybody up for calling a junkyard and seeing if the dope behind the counter tries to sell you some honest to goodness PI heads for more than 5.4 heads?

So wait, do they all flow the same? Also, did the early 5.4's have the same choked heads as my 4.6, or were all 5.4 heads PI heads?

MiracleMax · 12-10-2002, 07:49 AM

That I don't know? Not that they are the definitive source on mod motors, but Foxlake has done some airflow work on the heads. According to them, if your getting the sohc head ported, it doesn't matter which head you are using. They all flow pretty much the same in ported condition.

However if I know Ford, then the PI heads have been on the 5.4 all along.

The Deuce · 12-11-2002, 08:37 PM

Ok, so does the 5.4 get a plastic intake? I'm guessing since the deckheight is greater to increase the stroke, the 5.4 intake won't fit a 4.6 motor, but I'm just wondering if they run plastics on the trucks too?

97SOHCAMMER · 12-12-2002, 02:38 AM

Nope. The trucks use aluminum intake manifolds. It is very similar looking to the Bullitt/FRPP intake but with longer runners. My dad has this on his '02 F-150 which has a 4.6 not a 5.4 but it's very similar. I wonder if the truck intakes or parts of them would work on the Stangs? It used to be true with the 5 liter since the Exploder intake manifold would fit the Stang. I'm pretty sure the heads for the 5.4 were the same for the older engines. The new heads are identical to PI heads and are a bargain. If you can find them in a junkyard BUY THEM they are way cheaper than the mustang spec heads!

The Deuce · 12-12-2002, 01:18 PM

Quote:

Originally posted by 97SOHCAMMER
Nope. The trucks use aluminum intake manifolds. It is very similar looking to the Bullitt/FRPP intake but with longer runners. My dad has this on his '02 F-150 which has a 4.6 not a 5.4 but it's very similar. I wonder if the truck intakes or parts of them would work on the Stangs? It used to be true with the 5 liter since the Exploder intake manifold would fit the Stang. I'm pretty sure the heads for the 5.4 were the same for the older engines. The new heads are identical to PI heads and are a bargain. If you can find them in a junkyard BUY THEM they are way cheaper than the mustang spec heads!

Aluminum intake on the 4.6 f-series? Holy crap! Now I'm really going junkyard hunting.

97SOHCAMMER · 12-12-2002, 03:15 PM

Go for it! Report your findings.

The Deuce · 12-14-2002, 02:24 AM

Quote:

Originally posted by 97SOHCAMMER
Nope. The trucks use aluminum intake manifolds. It is very similar looking to the Bullitt/FRPP intake but with longer runners. My dad has this on his '02 F-150 which has a 4.6 not a 5.4 but it's very similar. I wonder if the truck intakes or parts of them would work on the Stangs? It used to be true with the 5 liter since the Exploder intake manifold would fit the Stang. I'm pretty sure the heads for the 5.4 were the same for the older engines. The new heads are identical to PI heads and are a bargain. If you can find them in a junkyard BUY THEM they are way cheaper than the mustang spec heads!

Can you double check the intake for me. I can't find anyone at a dealer locally with half a brain to look it up in the parts cataloge. Did get a quote under $300 for the explorer intake though. Man that would be sweet if that's what it really costs new.

12-07-2002, 07:51 PM	#1
The Deuce Registered Member Join Date: Apr 2002 Location: Atlanta, GA Posts: 2,325	5.4 Heads Anybody know how these flow compared to the 99+ 4.6 heads? How about intake/exhaust matching? I got to thinking, if you can swap heads across Windsor displacements, why not with the cammer motors? Any ideas? __________________ 1997 Mustang GT "The Freak" - 13.80 @ 101.70, 2.07 60' 1995 Honda VFR750 - not much @ really fast (actual data pending.) 1964.5 Mustang 289 Rice Haters Club Member #13

12-07-2002, 10:01 PM	#2
Ares Registered Member Join Date: Oct 2000 Location: Saxonburg, PA, USA Posts: 236	They are the same if I'm not mistaken. Besides my car came from factory with one marked for 5.4 Truck and other 4.6 Heavyduty Truck. __________________ Ed.. My Mustangs webpage NMRA M/M 7222 2000 Mustang GT - 5 speed Race weight w/o driver 3086lbs, 3250 w/ driver Best 1/4mile run to date: 12.79@105.96, 60' 1.76sec.(10-27-02) Best MPH 106.03(10-27-02)4.10gears

12-09-2002, 07:48 PM	#3
MiracleMax Registered Member Join Date: Apr 1999 Location: Hayes, Va, USA Posts: 798	Yeah PI heads are used on the 4.6 GT's and the 5.4 mod motors. Anybody up for calling a junkyard and seeing if the dope behind the counter tries to sell you some honest to goodness PI heads for more than 5.4 heads? __________________ 2002 5M GT (99% stock) 1991 5M LX (30% stock) patiently awaiting my satin silver 07 Mach 1, and don't forget the shaker

12-10-2002, 07:49 AM	#5
MiracleMax Registered Member Join Date: Apr 1999 Location: Hayes, Va, USA Posts: 798	That I don't know? Not that they are the definitive source on mod motors, but Foxlake has done some airflow work on the heads. According to them, if your getting the sohc head ported, it doesn't matter which head you are using. They all flow pretty much the same in ported condition. However if I know Ford, then the PI heads have been on the 5.4 all along. __________________ 2002 5M GT (99% stock) 1991 5M LX (30% stock) patiently awaiting my satin silver 07 Mach 1, and don't forget the shaker

12-11-2002, 08:37 PM	#6
The Deuce Registered Member Join Date: Apr 2002 Location: Atlanta, GA Posts: 2,325	Ok, so does the 5.4 get a plastic intake? I'm guessing since the deckheight is greater to increase the stroke, the 5.4 intake won't fit a 4.6 motor, but I'm just wondering if they run plastics on the trucks too? __________________ 1997 Mustang GT "The Freak" - 13.80 @ 101.70, 2.07 60' 1995 Honda VFR750 - not much @ really fast (actual data pending.) 1964.5 Mustang 289 Rice Haters Club Member #13

12-12-2002, 02:38 AM	#7
97SOHCAMMER Registered Member Join Date: Dec 2002 Location: Arlington Heights,IL Posts: 16	Nope. The trucks use aluminum intake manifolds. It is very similar looking to the Bullitt/FRPP intake but with longer runners. My dad has this on his '02 F-150 which has a 4.6 not a 5.4 but it's very similar. I wonder if the truck intakes or parts of them would work on the Stangs? It used to be true with the 5 liter since the Exploder intake manifold would fit the Stang. I'm pretty sure the heads for the 5.4 were the same for the older engines. The new heads are identical to PI heads and are a bargain. If you can find them in a junkyard BUY THEM they are way cheaper than the mustang spec heads! __________________ '97 Laser Red GT Coupe (Parked For the Winter) Stock 2V 4R70W Automatic (Rebuilt) Ripped off a BLISTERING 15.37@90MPH With a 2.11 60ft Removed Mufflers No Silencer K&N Air Filter Saleen S-351 Body Kit (Awaiting Paint) Coming Soon...... -4.10's -Mac Cat Back & Pro Chamber -Steeda Pullies -C&L Mass-Air -------------------------------------------- '89 Hyundai Excel GL (Winter Pimpmobile) -68 pavement melting HP -5-speed -Skull Shift Knob -One bad attitude

12-12-2002, 03:15 PM	#9
97SOHCAMMER Registered Member Join Date: Dec 2002 Location: Arlington Heights,IL Posts: 16	Go for it! Report your findings. __________________ '97 Laser Red GT Coupe (Parked For the Winter) Stock 2V 4R70W Automatic (Rebuilt) Ripped off a BLISTERING 15.37@90MPH With a 2.11 60ft Removed Mufflers No Silencer K&N Air Filter Saleen S-351 Body Kit (Awaiting Paint) Coming Soon...... -4.10's -Mac Cat Back & Pro Chamber -Steeda Pullies -C&L Mass-Air -------------------------------------------- '89 Hyundai Excel GL (Winter Pimpmobile) -68 pavement melting HP -5-speed -Skull Shift Knob -One bad attitude

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