GT40 heads vs GTP heads

99TurboV6Stang · September 15th, 2007, 08:08 PM

What heads are better performing heads for a street strip application

Tony_90fox · September 15th, 2007, 09:28 PM

http://www.carbdford.com/tech/headflow.htm

I believe the P's are a tiny bit better, but i doubt you could tell the difference between those two heads...

The main question you have to ask yourself is what headers you are going to be running...The P heads dont accept some headers because of the spark plug angle...But i believe most long tubes will fit them...

I personally like my ported gt40 iron heads.

Rustbelt · September 15th, 2007, 09:48 PM

i went with gt-40p's because i couldnt afford to port them. slightly better flow than stock gt-40s. and they are easy to find. but if you can afford to port them or know how to go with gt-40 and save the hassle of the exhaust issues

Darrell · September 15th, 2007, 10:08 PM

GT40Ps

99TurboV6Stang · September 17th, 2007, 10:20 AM

sweet thanks for the info building another car this time from scratch so i was wondering thanks for all the help.

Tony_90fox · September 17th, 2007, 12:26 PM

From scratch eh? Then why consider gt40p heads? Is this a budget build? What does the rest of the build consist of?

99TurboV6Stang · September 17th, 2007, 05:41 PM

i am going to try and see what kind of power i can make for the cheapest possible price have performer rpm intake .522/.546 lift cam dominater 650
ported heads of some sort hei distributer twin turbo kit

Tony_90fox · September 17th, 2007, 08:47 PM

Originally Posted by 99TurboV6Stang

i am going to try and see what kind of power i can make for the cheapest possible price have performer rpm intake .522/.546 lift cam dominater 650
ported heads of some sort hei distributer twin turbo kit

what kind of block are you going to use?

99TurboV6Stang · September 18th, 2007, 01:47 PM

i have a 351 windsor out of a 1997 f-250 bored .060 and stroked a lol like 370-380

Darrell · September 18th, 2007, 09:34 PM

Originally Posted by 99TurboV6Stang

i have a 351 windsor out of a 1997 f-250 bored .060 and stroked a lol like 370-380

Don't waste your time with GT40 heads on an engine with that many cubic inches. It will be out of breath by 5000 rpm. You need a bigger head.

September 15th, 2007, 08:08 PM	#1
99TurboV6Stang Newbie Join Date: Sep 2007 Location: Marquette, MI Posts: 14	GT40 heads vs GTP heads What heads are better performing heads for a street strip application __________________ 1987 Mustang lx covertable 415hp ford crate motor, subframe connectors, and 4 link 8.8 1999 Mustang V6 black, twin turbos, fuel system, T-56 w/stage 2 clutch, 8.8 locked rear, and all electronics. O ya 13lbs of boost.

September 15th, 2007, 09:28 PM	#2
Tony_90fox MM Fanatic Join Date: Jun 2006 Location: Bowling Green, KY Posts: 3,445	http://www.carbdford.com/tech/headflow.htm I believe the P's are a tiny bit better, but i doubt you could tell the difference between those two heads... The main question you have to ask yourself is what headers you are going to be running...The P heads dont accept some headers because of the spark plug angle...But i believe most long tubes will fit them... I personally like my ported gt40 iron heads. __________________ Suck on it Trebek. Suck it long, suck it hard.

September 15th, 2007, 10:08 PM	#4
Darrell MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 6,574	GT40Ps __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

September 17th, 2007, 10:20 AM	#5
99TurboV6Stang Newbie Join Date: Sep 2007 Location: Marquette, MI Posts: 14	sweet thanks for the info building another car this time from scratch so i was wondering thanks for all the help. __________________ 1987 Mustang lx covertable 415hp ford crate motor, subframe connectors, and 4 link 8.8 1999 Mustang V6 black, twin turbos, fuel system, T-56 w/stage 2 clutch, 8.8 locked rear, and all electronics. O ya 13lbs of boost.

September 17th, 2007, 12:26 PM	#6
Tony_90fox MM Fanatic Join Date: Jun 2006 Location: Bowling Green, KY Posts: 3,445	From scratch eh? Then why consider gt40p heads? Is this a budget build? What does the rest of the build consist of? __________________ Suck on it Trebek. Suck it long, suck it hard.

September 15th, 2007, 09:48 PM	#3
Rustbelt Regular Join Date: Mar 2007 Posts: 242	i went with gt-40p's because i couldnt afford to port them. slightly better flow than stock gt-40s. and they are easy to find. but if you can afford to port them or know how to go with gt-40 and save the hassle of the exhaust issues

September 17th, 2007, 05:41 PM	#7
99TurboV6Stang Newbie Join Date: Sep 2007 Location: Marquette, MI Posts: 14	i am going to try and see what kind of power i can make for the cheapest possible price have performer rpm intake .522/.546 lift cam dominater 650 ported heads of some sort hei distributer twin turbo kit __________________ 1987 Mustang lx covertable 415hp ford crate motor, subframe connectors, and 4 link 8.8 1999 Mustang V6 black, twin turbos, fuel system, T-56 w/stage 2 clutch, 8.8 locked rear, and all electronics. O ya 13lbs of boost.

September 18th, 2007, 01:47 PM	#9
99TurboV6Stang Newbie Join Date: Sep 2007 Location: Marquette, MI Posts: 14	i have a 351 windsor out of a 1997 f-250 bored .060 and stroked a lol like 370-380 __________________ 1987 Mustang lx covertable 415hp ford crate motor, subframe connectors, and 4 link 8.8 1999 Mustang V6 black, twin turbos, fuel system, T-56 w/stage 2 clutch, 8.8 locked rear, and all electronics. O ya 13lbs of boost.

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