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!

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

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.

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

ok, thanks a lot guys:D