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Author
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Topic: Are GT40Ps smog legal?
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Fox89GT
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Member # 1539
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posted
 
 
Just curious... If I install a set of these, Cobra intake and still keep the stock cam will I pass smog? I'm assuming that since these heads were on the SUVs to begin with that they would be okay. What about the Ford Racing version? Are they the same head? Anyone running these heads passed CA smog testing?
Posts: 40 | Registered: Jul 2002
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cobraman_1994
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Member # 467
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posted
i sure hope so or me and all the other 93-95 cobra owners are going to have "issues"
lol
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86 GT
Posts: 4882 | From: eldorado hills | Registered: Sep 2001
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Fox89GT
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Member # 1539
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posted
Looking through the Summit mag, they sell the Ford Racing GT40P head and usually they mention if its 50 state smog legal or not but this ad did not say anything about it so thats my question.
Posts: 40 | Registered: Jul 2002
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FasterDamnit
Bad Attitude
Member # 442
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posted
The smog injection ports are not open on those heads. Technically not smog legal unless the heads are drilled out. Once on the car I doubt anyone would know the difference.
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'92 LX T5
Looked stock, went 11's 11.90 at 115mph.
'65 Mustang 347
www.fordmuscle.com
Livin' in the Carolina Pines
Posts: 2971 | From: NorCal | Registered: Sep 2001
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Stimson
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Member # 51
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posted
quote:
Originally posted by cobraman_1994:
i sure hope so or me and all the other 93-95 cobra owners are going to have "issues"
lol
Actually the cobras and lightnings came with regular GT40's, not the GT40-P's. Do a search for "GT40-P TECH PAGE" for info on the differences.
Posts: 2373 | Registered: Jun 2000
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Glenn
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Member # 520
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posted
quote:
Originally posted by st5150:
quote:
Originally posted by cobraman_1994:
i sure hope so or me and all the other 93-95 cobra owners are going to have "issues"
lol
Actually the cobras and lightnings came with regular GT40's, not the GT40-P's. Do a search for "GT40-P TECH PAGE" for info on the differences.
GT40-P's are from the explorer's I believe.
[ September 06, 2002, 05:39 PM: Message edited by: Glenn ]
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S-Trim,331,H/C/I
"JohnB groupie train"
My Car
DragGuam
Posts: 2009 | From: Stationed on a Pacific Island, Guam | Registered: Oct 2001
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street_illegal_stang
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Member # 1554
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posted
yes,explorers carried gt40p cast heads..
you might be able to find the smog rating
on the explorer then compare it to your stang.
how much did you gain over stock heads?
did you have to use the gt40p headers to?
Posts: 1276 | From: Long Beach C.A | Registered: Jul 2002
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Glenn
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Member # 520
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quote:
Originally posted by street_illegal_stang:
yes,explorers carried gt40p cast heads..
you might be able to find the smog rating
on the explorer then compare it to your stang.
how much did you gain over stock heads?
did you have to use the gt40p headers to?
Any time you use the GT-40P heads you need to get different headers. The Spark Plugs are place differently, you can see about 30-40 HP gains with these heads, and a cobra intake. I actually have that combo being sent to me, it is used, GT-40P Heads, headers, and a cobra Intake, all for the fox bodies. the heads have 1.6 r/r as well. I might sell the whole thing, because I can't use the headers, and intake, so might as well sell it together. Let me know if you are intersted... Anyone.
[ September 06, 2002, 07:55 PM: Message edited by: Glenn ]
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S-Trim,331,H/C/I
"JohnB groupie train"
My Car
DragGuam
Posts: 2009 | From: Stationed on a Pacific Island, Guam | Registered: Oct 2001
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Fox89GT
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Member # 1539
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posted
Glenn, got any more info one the set you have coming? Have the heads and/or intake been touched? Why did the original owner sell them? Why are you thinking of selling them? How much are you thinking of asking?
Posts: 40 | Registered: Jul 2002
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Gear Head
JARED
Member # 779
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posted
So if you got gt 40 p heads on a 87-93 stang what kind of headers would you need, what brand, and how much do the headers cost?
I was just looking into these heads not too long ago and maybe get some port work done on them.
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Support our troops!
Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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PunkINa5.SLOW
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Member # 10
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posted
just put some afr 165s on the car and leave the GT40ps for the other guys.
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OUTTA THA DRAMA
R.I.P. MIKE STARKEY MY BABY BROTHER
12/8/77-5/17/03
Posts: 2495 | From: MTZ | Registered: Sep 2000
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phildog
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Member # 1214
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posted
The GT-40p's require different headers( MAC and Ford Racing being the only vendors) and they are quite fun(not) to change plugs with the straight plugs. If you're gonna go to all the trouble to change heads, save up some more dough and get some real heads like AFR's, Brodix, etc. The GT-40p's are better than stock, yet I don't think the hassle of switching heads is worth putting on a small head like a GT-40p. By the way, my car had GT-40p heads and passed smog like a champ.
Posts: 1554 | From: 510 | Registered: Apr 2002
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Stimson
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Member # 51
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posted
phildog- what cam and intake did you run with your P heads? Any track times or dyno numbers?
Posts: 2373 | Registered: Jun 2000
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Gear Head
JARED
Member # 779
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posted
quote:
Originally posted by PunkINa5.SLOW:
just put some afr 165s on the car and leave the GT40ps for the other guys.
Will do Dan
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Support our troops!
Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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Glenn
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Member # 520
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posted
quote:
Originally posted by Fox89GT:
Glenn, got any more info one the set you have coming? Have the heads and/or intake been touched? Why did the original owner sell them? Why are you thinking of selling them? How much are you thinking of asking?
It was on my bro's car, he is going bigger and better, I too want to go bigger and better, he is supposed to be bringing out the combo in Oct. I want to get atlast $900 for everything. LEt me know.
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S-Trim,331,H/C/I
"JohnB groupie train"
My Car
DragGuam
Posts: 2009 | From: Stationed on a Pacific Island, Guam | Registered: Oct 2001
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JimmysblownFiveO
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Member # 1265
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posted
i have those heads they suck
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Kenne Bell Supercharger
GT-40 motor
Posts: 33 | From: auburn | Registered: May 2002
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phildog
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Member # 1214
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posted
I ran a GT-40p headed long block from Cental Coast Mustangs with a Cobra intake, 65mm TB, 24lbers, stock cam with 1.7 Cobra rockers and other assorted goodies and bolt ons. The car ran 13.7 @ 103 with no traction, spinning 1st and 2nd with a 2.0 60 ft on street tires. I yanked that motor for something which will be a bit wilder...
Posts: 1554 | From: 510 | Registered: Apr 2002
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Gear Head
JARED
Member # 779
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posted
quote:
Originally posted by phildog:
I ran a GT-40p headed long block from Cental Coast Mustangs with a Cobra intake, 65mm TB, 24lbers, stock cam with 1.7 Cobra rockers and other assorted goodies and bolt ons. The car ran 13.7 @ 103 with no traction, spinning 1st and 2nd with a 2.0 60 ft on street tires. I yanked that motor for something which will be a bit wilder...
Doesnt sound like you were spinning them too much with a 2.0 60ft.
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Support our troops!
Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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phildog
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Member # 1214
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posted
I wasn't spinning out of the hole because I was lauching at idle and babying the throttle, doesn't matter anymore, the most of the old suspension, the rearend and the motor are now out of the car, replaced with better equipment, so we'll never know what might have been...but I wouldn't buy those heads again.
Posts: 1554 | From: 510 | Registered: Apr 2002
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93venom
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Member # 778
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posted
I pretty sure that cast iron gt40p's went on the 93-95 cobras. And regular 5.0 headers (frombbk,mac,fms whoever) should bolt up but the spark plugs are bitch because of the wierd angle on the gt40ps. I had to buy special plugs from ford for these heads, but yes, ford sells the correct headers for these heads. just go buy a set of aluminum 50 state heads,
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93 cobra #3445
1988 ranger-302 in progress
2003 ranger fx4 level 2
Posts: 604 | From: Peninsula | Registered: Jan 2002
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DropTopFox
drama
Member # 1689
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posted
I was just down at the parts store the other day at Serramonte Ford and the tech guy down there told me if I want to be smog legal to go all GT-40 because they are street legal. I asked him about the P's and he told me anything with the GT40 name on it is street legal. That's supposedly the whole point of the GT40 product line.
Posts: 4003 | From: San Bruno | Registered: Aug 2002
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FasterDamnit
Bad Attitude
Member # 442
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posted
WRONG!
The GT40P's are not smog legal for 5.0 Mustangs because they do not have the air injection ports that are needed for the smog pump system. Doesn't mean you can't bolt a set on and get away with it. There are smog legal ones available that have been modified. Central Coast Mustang, I think...
GT40X and Y heads are smog legal from FRPP.
JL
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'92 LX T5
Looked stock, went 11's 11.90 at 115mph.
'65 Mustang 347
www.fordmuscle.com
Livin' in the Carolina Pines
Posts: 2971 | From: NorCal | Registered: Sep 2001
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93venom
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Member # 778
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posted
according to the latest frpp catalogue, gt40ps are smog legal, and gt40x and y heads are not, just thought you guys would like to know that, straight outta the cataloge
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93 cobra #3445
1988 ranger-302 in progress
2003 ranger fx4 level 2
Posts: 604 | From: Peninsula | Registered: Jan 2002
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