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Author
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Topic: determining if heads are GT40P or GT40 X.Y
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SydeWayzSix
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Member # 2222
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posted
 
 
I am going to pick up a set of GT40 heads, but need to make sure that they are the ones that DO NOT require special headers. The P-heads are the ones that need the specific headers, right? Also, by looking at the heads or the stamp, how would I be able to determine which model they are??
thanks ![[patriot]](graemlins/patriot.gif)
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1989 Notchback "SF Giants" edition...
Goodbye '00 Kawi ZX-6R...you will be missed dearly.
....on with the show! :)
Posts: 1999 | From: Bay Area | Registered: Dec 2002
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91 5.0 5speed
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Member # 1867
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posted
quote:
Originally posted by SydeWayzSix:
I am going to pick up a set of GT40 heads, but need to make sure that they are the ones that DO NOT require special headers. The P-heads are the ones that need the specific headers, right? Also, by looking at the heads or the stamp, how would I be able to determine which model they are??
thanks
Quit being so damn cheap and just by my edelbrocks! ![[Big Grin]](biggrin.gif)
Posts: 1383 | From: Vallejo | Registered: Sep 2002
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93cobracoupestang
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Member # 5765
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posted
they say gt40p and have 3 lines on the back? i think.
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1993 Lx Coupe.....a couple bolt ons.
2007 Suzuki GSX-R 600
Posts: 398 | From: Riverside | Registered: Jun 2005
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SydeWayzSix
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Member # 2222
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posted
quote:
Originally posted by 91 5.0 5speed:
quote:
Originally posted by SydeWayzSix:
I am going to pick up a set of GT40 heads, but need to make sure that they are the ones that DO NOT require special headers. The P-heads are the ones that need the specific headers, right? Also, by looking at the heads or the stamp, how would I be able to determine which model they are??
thanks
Quit being so damn cheap and just by my edelbrocks!
man....I would, but thats over $500 more out of my broke ass pockets ![[Frown]](frown.gif)
For this stock bottom end, I just need something a little better than stock. Once I have money to build a "real motor," I'll be in the market for some aluminum ones If you let them go for $300 I'll pick them up tomorrow ![[Wink]](wink.gif)
quote:
Originally posted by 93cobracoupestang:
they say gt40p and have 3 lines on the back? i think.
3 lines on the back??? What do you mean ![[Confused]](confused.gif)
[ April 11, 2006, 01:09 AM: Message edited by: SydeWayzSix ]
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1989 Notchback "SF Giants" edition...
Goodbye '00 Kawi ZX-6R...you will be missed dearly.
....on with the show! :)
Posts: 1999 | From: Bay Area | Registered: Dec 2002
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93cobracoupestang
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Member # 5765
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posted
on the head there are lines that stick out im not sure how to explain it. but its obvious when you look at it. they will say gt40p and will have 3 lines im pretty sure on the back of it. somebody help me out/sidwayz out.
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1993 Lx Coupe.....a couple bolt ons.
2007 Suzuki GSX-R 600
Posts: 398 | From: Riverside | Registered: Jun 2005
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modular
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Member # 6599
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posted
The plugs go straight in and are not angled giving the reason for the special headers.
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I had no idea that so many people knew everything until I joined this site.
I was prolly drunk. Get over it
***BEWARE*** COP CALLERS! Eljefe-Adower!
Posts: 548 | From: sacramento | Registered: Mar 2006
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1quik69
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Member # 5481
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posted
On the edge of the head right below the valve cover it will say gt40 or gt40p or something like that on the "p" head. The 40's have 3 raised bars on the front of the head, the "p"s have 4 raised bars. The bars look like those shortbread cookies you buy.
Posts: 120 | From: Redding | Registered: Mar 2005
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SydeWayzSix
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Member # 2222
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posted
quote:
Originally posted by modular:
The plugs go straight in and are not angled giving the reason for the special headers.
So the P-head's plugs are straight, right?
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1989 Notchback "SF Giants" edition...
Goodbye '00 Kawi ZX-6R...you will be missed dearly.
....on with the show! :)
Posts: 1999 | From: Bay Area | Registered: Dec 2002
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23boy5.0
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Member # 5511
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posted
what are the differences in the two heads performance wise?
Posts: 320 | From: frisco | Registered: Mar 2005
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93cobracoupestang
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Member # 5765
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posted
the "p"s flow better
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1993 Lx Coupe.....a couple bolt ons.
2007 Suzuki GSX-R 600
Posts: 398 | From: Riverside | Registered: Jun 2005
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vpr_klr
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Member # 3353
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posted
DON'T BUY P HEADS. THEY ARE JUNK(THOUGH, BETTER THAN STOCK, BUT CUSTOM HEADERS FOR SHIT HEADS!?).
THEY DON'T FLOW MORE, AT ALL.
THE REVISED PLUG ANGLE IS WHERE THE POWER IS AT. THEY USED A STRAIGHT PLUG FOR BETTER COMBUSTION IN THE LATER MODEL, OBD-II EQUIPPED VEHICLES(EXPLORER'S).
THINK ABOUT THIS, GT-40'S CAME OFF COBRA'S AND WERE SOLD IN THE FORD RACING CATALOG
WHILE THE GT-40 "P" HEADS CAME OFF EXPLORER'S AND WERE NEVER OFFERED BY FORD RACING.
WHICH ONE WOULD YOU RATHER HAVE.......
IF THEY ARE "P" HEADS, A BETTER IDEA WOULD BE TO EXCHANGE YOUR STOCK HEADS FOR CNC PORTED POWER HEADS(STILL AN E7TE CASTING).
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Project crustang has begun
14 mustangs and counting...
Posts: 893 | From: Livermore | Registered: Oct 2003
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SydeWayzSix
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Member # 2222
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posted
ok...I picked up the heads.
They are stamped "GT" on the corners, but do not say GT40...also, they have 3 raised bars on the backside. These are the NON "P" heads right?
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1989 Notchback "SF Giants" edition...
Goodbye '00 Kawi ZX-6R...you will be missed dearly.
....on with the show! :)
Posts: 1999 | From: Bay Area | Registered: Dec 2002
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forced331
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Member # 1270
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posted
What you have are Standard Gt40 heads, the same as the 93 cobra.
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1992 Ford Mustang LX (Original Owner)"Titanium Frost" 331stroker S-Trim, 5spd
2014 Ford Mustang GT- daily driver
Posts: 1154 | From: Sonoma County | Registered: May 2002
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SydeWayzSix
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Member # 2222
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posted
quote:
Originally posted by forced331:
What you have are Standard Gt40 heads, the same as the 93 cobra.
yeah..thats what I wanted I dont want the P-heads because I didnt want to deal with the headers
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1989 Notchback "SF Giants" edition...
Goodbye '00 Kawi ZX-6R...you will be missed dearly.
....on with the show! :)
Posts: 1999 | From: Bay Area | Registered: Dec 2002
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