GT40-P's

Scrapla · 12-16-2002, 11:59 PM

I'm ready to install heads on my car but i'm on a budget and I just wanted to see what everyone thinks about the GT40-P's I was lookin at them on jegs (397-M-6049-P303) and they seem to be the best price for me there like $275 a peice and id like to maybe throw on some 1.60 rr's and then maybe a E-303 cam, what does everyone think?

Agent_4573 · 12-17-2002, 12:47 AM

the gt-40p's are a great way to go w/ a budget. I just got the gt40 intake and as soon as i get some money the heads are coming next. I hear they add some serious horsepower over the E7's especially if you do some light porting and polishing to em.

Scrapla · 12-17-2002, 12:30 PM

What about using a B or E cam with these heads and also should I get new rods or just reuse the stockers if there in good shape, remember i'm on a budget so id like to only buy what I really need, thanks.

Agent_4573 · 12-17-2002, 01:12 PM

From what others have told me, the stock cam still makes great power with the heads, but if you want to you can feel free to use a B cam. The E cam might be a little big if you plan on keeping it smog legal and all. I'm not really sure on the pushrods. I was planning on reusing mine when i did it but now I'm not to sure. They already have 100k on em and with the more power that the heads will put out, i would recommend being on the safe side and getting new pushrods.

fiveOguy20 · 12-17-2002, 09:23 PM

not to make agent 4573 sound dumb.. not the intent but if ur lookin to stay smog legal Bcam is not the way to go.. u'll never pass the sniffer test with that cam. Dont get me wrong its a great cam but to much duration to past the test.. the E is a smog legal sooo there ya go man. best of luck man.

fiveohpatrol · 12-17-2002, 10:00 PM

You'll definately want to do some porting on them if you do decide to get them. The intake side flows great, but the exhaust side needs a little work. You will be fine with a motorsport cam if you do some port work to even out the flow, but if not, then go after a split duration cam that favors the exhaust side.

$275 is way too much, when you can get them MUCH cheaper here http://www.kellnet.com/chambers/

I bought a pair of bare P's + valves for $280 from them, not to shabby.

good luck,
-drew

Agent_4573 · 12-18-2002, 12:50 AM

you can get them 275 a piece assembled ready to bolt on at http://www.nothingbutperformance.com/ .

Sorry about the cam earlier... maybe i had em backwards, either way it got set straight and i hope the best for you.

ChunkFunky · 12-18-2002, 07:21 AM

granted the POWERHEADS are a little bit more... but arent they a better head? would the extra couple bucks be worth it?

Pair Complete + Core Charge $695.00

roughly 350 a piece
-as

Scrapla · 12-18-2002, 01:51 PM

Alright this is as cheap as I can find them online what do yall think http://www.perogie.com/50Mustang.htm I belive 495 for the pair.

ChunkFunky · 12-18-2002, 02:33 PM

Well the cheapest I've seen are the ones from chambers... it was posted earlier in this thread...

ASSEMBLED - Basic, ready-to-bolt-on GT-40P heads from the same lot of clean and un-rusted factory castings. These affordable heads are assembled with factory style components including stainless steel valves, retainers, seal and locks. Valve springs are single wound with dampers suitable for valve lifts up to 0.520".

$425.00 plus shipping

ChunkFunky · 12-18-2002, 02:47 PM

Well the cheapest I've seen are the ones from chambers... it was posted earlier in this thread...

ASSEMBLED - Basic, ready-to-bolt-on GT-40P heads from the same lot of clean and un-rusted factory castings. These affordable heads are assembled with factory style components including stainless steel valves, retainers, seal and locks. Valve springs are single wound with dampers suitable for valve lifts up to 0.520".

$425.00 plus shipping

squid · 12-18-2002, 04:07 PM

Wont he have to drill his "P" heads for the thermactor fittings in the back of the heads to pass any smog test? I have seen this option on the heads for like an extra 100bux.

Agent_4573 · 12-18-2002, 04:34 PM

yes he will... but it comes with a boss thats ready to be drilled and tapped... it won't be to hard.

Scrapla · 12-18-2002, 05:00 PM

I was unaware I had them on my car I didnt remember seeing them when I did the header install also I live in florida and we dont have emmisons.

tireburner163 · 12-18-2002, 08:33 PM

Central Coast Mustang sells GT-40P's for $639 with a stage 1 port and upgraded valve springs.

Beware using the stock valve springs they are only good to .500 lift.

Scrapla · 12-19-2002, 07:34 AM

This is my first stang i'm working on and havent noticed exaxtly what the thermactor fittings look like, I do have a few freinds a expeirenced head shop so i'm sure they'll know exactly what to do but outta curiousity does anyone have a pic I can see of them.

fiveohpatrol · 12-19-2002, 10:30 AM

Quote:

Beware using the stock valve springs they are only good to .500 lift.

The stock springs will be good for up to 0.520" lift

12-16-2002, 11:59 PM	#1
Scrapla Registered Member Join Date: Apr 2002 Location: Florida Posts: 532	GT40-P's I'm ready to install heads on my car but i'm on a budget and I just wanted to see what everyone thinks about the GT40-P's I was lookin at them on jegs (397-M-6049-P303) and they seem to be the best price for me there like $275 a peice and id like to maybe throw on some 1.60 rr's and then maybe a E-303 cam, what does everyone think? __________________ 90gt 347 and some bolt ons :-) RICE HATERS MEMBER #73

12-17-2002, 12:47 AM	#2
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	the gt-40p's are a great way to go w/ a budget. I just got the gt40 intake and as soon as i get some money the heads are coming next. I hear they add some serious horsepower over the E7's especially if you do some light porting and polishing to em. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

12-17-2002, 12:30 PM	#3
Scrapla Registered Member Join Date: Apr 2002 Location: Florida Posts: 532	What about using a B or E cam with these heads and also should I get new rods or just reuse the stockers if there in good shape, remember i'm on a budget so id like to only buy what I really need, thanks. __________________ 90gt 347 and some bolt ons :-) RICE HATERS MEMBER #73

12-17-2002, 01:12 PM	#4
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	From what others have told me, the stock cam still makes great power with the heads, but if you want to you can feel free to use a B cam. The E cam might be a little big if you plan on keeping it smog legal and all. I'm not really sure on the pushrods. I was planning on reusing mine when i did it but now I'm not to sure. They already have 100k on em and with the more power that the heads will put out, i would recommend being on the safe side and getting new pushrods. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

12-17-2002, 10:00 PM	#6
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	You'll definately want to do some porting on them if you do decide to get them. The intake side flows great, but the exhaust side needs a little work. You will be fine with a motorsport cam if you do some port work to even out the flow, but if not, then go after a split duration cam that favors the exhaust side. $275 is way too much, when you can get them MUCH cheaper here http://www.kellnet.com/chambers/ I bought a pair of bare P's + valves for $280 from them, not to shabby. good luck, -drew __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

12-17-2002, 09:23 PM	#5
fiveOguy20 Registered Member Join Date: Sep 2002 Posts: 156	not to make agent 4573 sound dumb.. not the intent but if ur lookin to stay smog legal Bcam is not the way to go.. u'll never pass the sniffer test with that cam. Dont get me wrong its a great cam but to much duration to past the test.. the E is a smog legal sooo there ya go man. best of luck man.

12-18-2002, 12:50 AM	#7
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	you can get them 275 a piece assembled ready to bolt on at http://www.nothingbutperformance.com/ . Sorry about the cam earlier... maybe i had em backwards, either way it got set straight and i hope the best for you. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

12-18-2002, 07:21 AM	#8
ChunkFunky Registered Member Join Date: Apr 2002 Location: Tustin, CA Posts: 465	granted the POWERHEADS are a little bit more... but arent they a better head? would the extra couple bucks be worth it? Pair Complete + Core Charge $695.00 roughly 350 a piece -as __________________ '89 GT Convertible: TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit

12-18-2002, 01:51 PM	#9
Scrapla Registered Member Join Date: Apr 2002 Location: Florida Posts: 532	Alright this is as cheap as I can find them online what do yall think http://www.perogie.com/50Mustang.htm I belive 495 for the pair. __________________ 90gt 347 and some bolt ons :-) RICE HATERS MEMBER #73

12-18-2002, 02:33 PM	#10
ChunkFunky Registered Member Join Date: Apr 2002 Location: Tustin, CA Posts: 465	Well the cheapest I've seen are the ones from chambers... it was posted earlier in this thread... ASSEMBLED - Basic, ready-to-bolt-on GT-40P heads from the same lot of clean and un-rusted factory castings. These affordable heads are assembled with factory style components including stainless steel valves, retainers, seal and locks. Valve springs are single wound with dampers suitable for valve lifts up to 0.520". $425.00 plus shipping __________________ '89 GT Convertible: TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit

12-18-2002, 02:47 PM	#11
ChunkFunky Registered Member Join Date: Apr 2002 Location: Tustin, CA Posts: 465	Well the cheapest I've seen are the ones from chambers... it was posted earlier in this thread... ASSEMBLED - Basic, ready-to-bolt-on GT-40P heads from the same lot of clean and un-rusted factory castings. These affordable heads are assembled with factory style components including stainless steel valves, retainers, seal and locks. Valve springs are single wound with dampers suitable for valve lifts up to 0.520". $425.00 plus shipping __________________ '89 GT Convertible: TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit

12-18-2002, 04:07 PM	#12
squid Registered Member Join Date: Sep 2002 Location: Dayton, OHIO Posts: 73	Wont he have to drill his "P" heads for the thermactor fittings in the back of the heads to pass any smog test? I have seen this option on the heads for like an extra 100bux. __________________ 93'GT 5spd. Underdrives, FMS clutch, adjustable quadrant,Flowmasters, Kenny Brown subframe connectors, 3.73 gears, Steeda Tri-Ax. JBA shorties, BBK h-pipe. More to come.

12-18-2002, 04:34 PM	#13
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	yes he will... but it comes with a boss thats ready to be drilled and tapped... it won't be to hard. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

12-18-2002, 05:00 PM	#14
Scrapla Registered Member Join Date: Apr 2002 Location: Florida Posts: 532	I was unaware I had them on my car I didnt remember seeing them when I did the header install also I live in florida and we dont have emmisons. __________________ 90gt 347 and some bolt ons :-) RICE HATERS MEMBER #73

12-18-2002, 08:33 PM	#15
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Central Coast Mustang sells GT-40P's for $639 with a stage 1 port and upgraded valve springs. Beware using the stock valve springs they are only good to .500 lift. __________________ 1987 Buick T-type 1998 HD Electra Elide

12-19-2002, 07:34 AM	#16
Scrapla Registered Member Join Date: Apr 2002 Location: Florida Posts: 532	This is my first stang i'm working on and havent noticed exaxtly what the thermactor fittings look like, I do have a few freinds a expeirenced head shop so i'm sure they'll know exactly what to do but outta curiousity does anyone have a pic I can see of them. __________________ 90gt 347 and some bolt ons :-) RICE HATERS MEMBER #73

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