GTP-Heads

88workcar · 01-21-2001, 08:03 AM

What is the valve size for these heads? Do you need a special header? Thanks I need a set of heads, mine are shot.

Jeff Chambers · 01-21-2001, 09:23 AM

Valves are 1.84" intake and 1.465" exhaust. They do require a P-specific header to do things right mainly due to the repositioned spark plug compared to other production Windsor heads. Non-P-specific headers have been known to work, but require either a shortened spark plug, dimpling a header tube, or making a special spark plug wrench. Using a non-P-specific header is almost guaranteed to melt plug boots on a regular basis.

One of the guys around here (Skankin) has a good page dedicated to the P heads but I don't have the URL handy. Check some of the other head related posts going in this forum.

------------------
Jeff Chambers
Trophy Stock #3
11.97 Seconds / 114.5 MPH
Chambers Racing Team

Josh91 · 01-21-2001, 04:32 PM

All of the P info you need can be found in the page below in my sig. You do need P specific headers. I am switching to longtubes, so my FRPP P shorties will be for sale.

------------------
1991 Mustang GT - Cobra Intake, FMS 65mm TB, C&L 73mm MAF, GT-40P heads, Crane 2031 cam, Crane 1.7rr, Built AOD, Art Carr 2400 non-lockup converter, Transgo shift kit, BBK chrome cold air, FMS 'P' headers, Pacesetter off-road H, BBK aluminum pulleys, 2-C Flows w/ dumps, 4.10's, Steeda STB, for now...

The Original GT-40P Tech Page

88workcar · 01-21-2001, 06:38 PM

Thanks fellas, It allways feels good when Jeff, or Dan take the time to help us out. Josh, thanks to you too. This is all I needed to know. I am ordering Edelbrocs. My valve guides are so severly worn that the valves will move almost .200 .....all of them. The old E7s have to be retired.

------------------
Jason B Johnson
88LX,speed density,edel heads,4.30s,B-303,cobra,tremac,
12.38 @ 111.28 1.80 60ft 28X10 street tires
12.17 @ 112 26 X 10 slicks
http://www.mustangworks.com/mustangs...g347-slot3.jpg

01-21-2001, 08:03 AM	#1
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	GTP-Heads What is the valve size for these heads? Do you need a special header? Thanks I need a set of heads, mine are shot.

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01-21-2001, 09:23 AM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Valves are 1.84" intake and 1.465" exhaust. They do require a P-specific header to do things right mainly due to the repositioned spark plug compared to other production Windsor heads. Non-P-specific headers have been known to work, but require either a shortened spark plug, dimpling a header tube, or making a special spark plug wrench. Using a non-P-specific header is almost guaranteed to melt plug boots on a regular basis. One of the guys around here (Skankin) has a good page dedicated to the P heads but I don't have the URL handy. Check some of the other head related posts going in this forum. ------------------ Jeff Chambers Trophy Stock #3 11.97 Seconds / 114.5 MPH Chambers Racing Team

01-21-2001, 04:32 PM	#3
Josh91 Registered Member Join Date: Nov 1998 Location: Salina, KS Posts: 83	All of the P info you need can be found in the page below in my sig. You do need P specific headers. I am switching to longtubes, so my FRPP P shorties will be for sale. ------------------ 1991 Mustang GT - Cobra Intake, FMS 65mm TB, C&L 73mm MAF, GT-40P heads, Crane 2031 cam, Crane 1.7rr, Built AOD, Art Carr 2400 non-lockup converter, Transgo shift kit, BBK chrome cold air, FMS 'P' headers, Pacesetter off-road H, BBK aluminum pulleys, 2-C Flows w/ dumps, 4.10's, Steeda STB, for now... The Original GT-40P Tech Page

01-21-2001, 06:38 PM	#4
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	Thanks fellas, It allways feels good when Jeff, or Dan take the time to help us out. Josh, thanks to you too. This is all I needed to know. I am ordering Edelbrocs. My valve guides are so severly worn that the valves will move almost .200 .....all of them. The old E7s have to be retired. ------------------ Jason B Johnson 88LX,speed density,edel heads,4.30s,B-303,cobra,tremac, 12.38 @ 111.28 1.80 60ft 28X10 street tires 12.17 @ 112 26 X 10 slicks http://www.mustangworks.com/mustangs...g347-slot3.jpg