GT40P swap

ryanw · October 24th, 2011, 11:16 AM

Originally Posted by dirty_d

I hope its not too hard. All i know is this would be a hell of a lot easier if I had a garage to work in. I've been doing all of this in the street, lol.

Aw that sucks lol. If I didn't have a garage to work in I'd never even lift the hood. Lol every thing would take me' 10 times longer to do. I feel your pain

dirty_d · October 24th, 2011, 08:03 PM

talk about a pain in the ass. I had to unbolt the headers to even get plug #4 in the threads. I needed to unbolt the other side also to get the trimmed spark plug socket on #7. And after all that there is about 1/16" between the #4 terminal and the header tube. You either need to dent in the header tube or use a shorty plug on #7. I might just tear the boot off a wire, wrap the metal around it and insulate it somehow. If you want a tool that would be a lot better than what i used just get a deepwell 5/8" socket and use a cut off wheel to cut it so its just long enough to grab a fully seated plug and stick far out enough to be attached to some kinda handle. make 2 cuts down the length to make it like an open ended wrench then weld a handle at an angle to it. No guarantee you'd have room to be able to turn it far enough without it hitting something though.

cleangtvert · October 25th, 2011, 06:25 AM

^^^^^^this tells me i'm shoping for new headers lol!

dirty_d · October 25th, 2011, 07:58 AM

Yea I was gonna say just save yourself the aggravation and get the right headers, lol.

dirty_d · October 26th, 2011, 09:00 AM

I got it all together yesterday. I found out a 5.0 HO can run on a 1-8-4-5-6-2-7-3 firing order, lol. A quick CW/CCW switcharoo fixed that problem. I still have a problem with the #4 plug though, I tried temporarily just globbing it up with rtv to insulate it from the headers, but its still misfiring on that cylinder. I've also bot a pretty bad exhaust leak. I think during all that spark plug madness I tore part of a gasket off. Anyone got any gt40p headers for sale? lol

dirty_d · October 26th, 2011, 12:10 PM

The ford racing gt40p shorty headers are on the way

Smirnoff · October 26th, 2011, 07:42 PM

I have bbk longtubes on my car with p heads and they fit fine with 90* plug boots and regular spark plugs. I did have to make a spark plug tool tho

OZ_872 · October 26th, 2011, 09:07 PM

Smirnoff, where did you have fitment issues? I just used a regular spark plug socket for all 8 with my P's and BBK longtubes, there was only one where the ratchet wouldn't fit on the socket so i had to turn the socket with a wrench, was no big deal

Smirnoff · October 27th, 2011, 10:43 AM

I had issues with 5 and 6, I couldn't get a regular spark plug socket on them

dirty_d · October 28th, 2011, 09:39 PM

The new headers came in the mail today. I installed them out in the the dark with a flashlight in my mouth, lol. All I can say is holy shit what a difference, the gt40ps and 1.7 rockers are giving a very noticeable boost in power, especially when 2 of the plug boots aren't melted and shorting to the headers, lol. I do have an exhaust leak on the left header. For some reason the nuts on the ball and socket joint reach the end of the threads before the joint is sealed. Hopefully a few washers under the nuts will fix the problem. The car also sounds a lot more mean, at idle too, really loppy. I'm not sure if that's from the 1.7 rockers or what.

I'm also hearing a weird sound. kinda metallic but not really in a bad way. Is that just what roller rockers sound like?

cleangtvert · October 29th, 2011, 08:32 AM

how much where the frpp headers?

dirty_d · October 29th, 2011, 10:22 AM

$240 from latemodelrestoration.com, the lowest I could find.

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October 24th, 2011, 08:03 PM	#22
dirty_d Regular Join Date: Sep 2010 Posts: 58 iTrader: 0 reviews	talk about a pain in the ass. I had to unbolt the headers to even get plug #4 in the threads. I needed to unbolt the other side also to get the trimmed spark plug socket on #7. And after all that there is about 1/16" between the #4 terminal and the header tube. You either need to dent in the header tube or use a shorty plug on #7. I might just tear the boot off a wire, wrap the metal around it and insulate it somehow. If you want a tool that would be a lot better than what i used just get a deepwell 5/8" socket and use a cut off wheel to cut it so its just long enough to grab a fully seated plug and stick far out enough to be attached to some kinda handle. make 2 cuts down the length to make it like an open ended wrench then weld a handle at an angle to it. No guarantee you'd have room to be able to turn it far enough without it hitting something though.

October 25th, 2011, 06:25 AM	#23
cleangtvert Enthusiast 1991 gt vert Join Date: Oct 2010 Location: st louis Posts: 727 iTrader: 0 reviews	^^^^^^this tells me i'm shoping for new headers lol!

October 25th, 2011, 07:58 AM	#24
dirty_d Regular Join Date: Sep 2010 Posts: 58 iTrader: 0 reviews	Yea I was gonna say just save yourself the aggravation and get the right headers, lol.

October 26th, 2011, 09:00 AM	#25
dirty_d Regular Join Date: Sep 2010 Posts: 58 iTrader: 0 reviews	I got it all together yesterday. I found out a 5.0 HO can run on a 1-8-4-5-6-2-7-3 firing order, lol. A quick CW/CCW switcharoo fixed that problem. I still have a problem with the #4 plug though, I tried temporarily just globbing it up with rtv to insulate it from the headers, but its still misfiring on that cylinder. I've also bot a pretty bad exhaust leak. I think during all that spark plug madness I tore part of a gasket off. Anyone got any gt40p headers for sale? lol

October 26th, 2011, 12:10 PM	#26
dirty_d Regular Join Date: Sep 2010 Posts: 58 iTrader: 0 reviews	The ford racing gt40p shorty headers are on the way

October 26th, 2011, 07:42 PM	#27
Smirnoff Enthusiast 1982 GT t-top no proof of purchase Join Date: May 2008 Location: N.E.PA Posts: 717 iTrader: 0 reviews	I have bbk longtubes on my car with p heads and they fit fine with 90* plug boots and regular spark plugs. I did have to make a spark plug tool tho

October 26th, 2011, 09:07 PM	#28
OZ_872 Regular Join Date: Oct 2009 Posts: 109 iTrader: 0 reviews	Smirnoff, where did you have fitment issues? I just used a regular spark plug socket for all 8 with my P's and BBK longtubes, there was only one where the ratchet wouldn't fit on the socket so i had to turn the socket with a wrench, was no big deal

October 27th, 2011, 10:43 AM	#29
Smirnoff Enthusiast 1982 GT t-top no proof of purchase Join Date: May 2008 Location: N.E.PA Posts: 717 iTrader: 0 reviews	I had issues with 5 and 6, I couldn't get a regular spark plug socket on them

October 28th, 2011, 09:39 PM	#30
dirty_d Regular Join Date: Sep 2010 Posts: 58 iTrader: 0 reviews	The new headers came in the mail today. I installed them out in the the dark with a flashlight in my mouth, lol. All I can say is holy shit what a difference, the gt40ps and 1.7 rockers are giving a very noticeable boost in power, especially when 2 of the plug boots aren't melted and shorting to the headers, lol. I do have an exhaust leak on the left header. For some reason the nuts on the ball and socket joint reach the end of the threads before the joint is sealed. Hopefully a few washers under the nuts will fix the problem. The car also sounds a lot more mean, at idle too, really loppy. I'm not sure if that's from the 1.7 rockers or what. I'm also hearing a weird sound. kinda metallic but not really in a bad way. Is that just what roller rockers sound like?

October 29th, 2011, 08:32 AM	#31
cleangtvert Enthusiast 1991 gt vert Join Date: Oct 2010 Location: st louis Posts: 727 iTrader: 0 reviews	how much where the frpp headers?

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October 29th, 2011, 10:22 AM	#32
dirty_d Regular Join Date: Sep 2010 Posts: 58 iTrader: 0 reviews	$240 from latemodelrestoration.com, the lowest I could find.