numbers and ratings on GT40 and GT40ps?

5.0 Pony · 01-28-2003, 04:59 PM

Hey, there is a swap meet coming up this weekend, and im looking for some heads. Does anyone know where i can find the ford part numbers to GT-40's? and GT-40Ps? Also, how much HP would they give me? THANKS A LOT!

NotchJohnson · 01-29-2003, 12:38 AM

I cant help you out with the part numbers, but if you look at the heads (you may already know this), the gt40 heads will have "gt" cast into them, and the p heads will have "gtp" on them. I am almost positive the gt-40p heads flow better than the standard gt40's, and I know the combustion chamber is smaller, I think by about 2cc??? Im sure you know that if you happen to find p heads you will need different headers. I have ported gt40s on my car, along with a ported cobra intake, 65mm tb, 75mm maf and 1.6 rr. The car pulls really hard past 3k and keeps pulling all the way to 6k. It definitely has more power up high. You will be impressed with the power, but I would definitely change the intake as well. I hope this helps you a little but, Im not sure what you already knew, John

Hethj7 · 01-29-2003, 11:37 AM

Don't know specifics on flow numbers, but I have the GT-40 cast iron heads. With intake, B cam, and the usual bolt ons, I am making the power in my sig.

Ron1 · 01-29-2003, 11:44 AM

You will find some usefull information here: Click on the word "moved" in the body of the text to get to all the flow numbers...

http://www.jason.fletcher.net/tech/offsite/gt40p.htm

Ron

5.0 Pony · 01-29-2003, 10:41 PM

ok, thanks a lot guys

01-28-2003, 04:59 PM	#1
5.0 Pony Registered Member Join Date: Jun 2002 Location: Nebraska Posts: 127	numbers and ratings on GT40 and GT40ps? Hey, there is a swap meet coming up this weekend, and im looking for some heads. Does anyone know where i can find the ford part numbers to GT-40's? and GT-40Ps? Also, how much HP would they give me? THANKS A LOT! __________________ 1988 Mustang 5.0 LX Convertible -Mac Cold Air Intake -K&N Cone Filter -9mm FMS Spark Plug Wires -Hedmann Headers 2.5" O/R H-Pipe -Flowmaster 40 series 2.5" Catback

01-29-2003, 12:38 AM	#2
NotchJohnson Registered Member Join Date: Oct 2001 Location: Florida Keys Posts: 593	I cant help you out with the part numbers, but if you look at the heads (you may already know this), the gt40 heads will have "gt" cast into them, and the p heads will have "gtp" on them. I am almost positive the gt-40p heads flow better than the standard gt40's, and I know the combustion chamber is smaller, I think by about 2cc??? Im sure you know that if you happen to find p heads you will need different headers. I have ported gt40s on my car, along with a ported cobra intake, 65mm tb, 75mm maf and 1.6 rr. The car pulls really hard past 3k and keeps pulling all the way to 6k. It definitely has more power up high. You will be impressed with the power, but I would definitely change the intake as well. I hope this helps you a little but, Im not sure what you already knew, John __________________ 89 notch-finally not stock!! ported gt40's, ported cobra intake, 65mm tb, 75mm maf, mac cai, lt's,prochamber, fms 1.6 rr, 125 shot.

01-29-2003, 11:37 AM	#3
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	Don't know specifics on flow numbers, but I have the GT-40 cast iron heads. With intake, B cam, and the usual bolt ons, I am making the power in my sig. __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

01-29-2003, 11:44 AM	#4
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	You will find some usefull information here: Click on the word "moved" in the body of the text to get to all the flow numbers... http://www.jason.fletcher.net/tech/offsite/gt40p.htm Ron __________________ 65 Mustang Fastback 347 Stroker, C4 with 4.56 10.68 @ 122 N/A 9.74 @ 137 w/ N2O www.fastspecialties.com

01-29-2003, 10:41 PM	#5
5.0 Pony Registered Member Join Date: Jun 2002 Location: Nebraska Posts: 127	ok, thanks a lot guys __________________ 1988 Mustang 5.0 LX Convertible -Mac Cold Air Intake -K&N Cone Filter -9mm FMS Spark Plug Wires -Hedmann Headers 2.5" O/R H-Pipe -Flowmaster 40 series 2.5" Catback