what heads for the $$$$

[94redz28]

i have a 92 gt which is going to have a gt-40 upper and lower, 65mm tb, 80mm mass air, and shorty headers and i was wondering which heads would suite my car best. I am looking to spend around 500 so i need some info and if anyone is selling some for around my price just tell me.. thanks

 

[Skoobie]

Just get a set of GT-40p heads. If you have a little cash left over get them ported out a little. Port out the intake as well. I have that combo and it make pretty good power (300+ @ the wheels).

 

[90topdown]

GT-40P heads are a good suggestion but you are probably going to need a set of "p" specific headers to clear the spark plugs with them.
If you go with a set of standard GT-40 heads, you could definitely re-use your existing headers and stay within your budget.

 

[94redz28]

what is the difference between p and just plain gt 40 heads? my headers are bbk shorties

 

[Tonys96Cobra]

The P's came off the late model Explorers, and will flow a bit more out of the box, but since youve already got headers, stick with the regualer GT40's. Check ebay, there is a set on thers for like 175+ship with no bids yet.

 

[94redz28]

what are the specs on these types of heads???

 

[IntenseBlue]

I'd get a set of Y303 aluminum heads.

 

[94redz28]

why are the y303 alum heads better?? price range???

 

[89white50]

aluminum heads will save you about 60 pounds. try to get a set with 58cc combustions chambers, since there are different models out. I HIGHLY doubt you will see 300+hp at the wheels with GT 40 heads, intake and other said bolt on. Most guys JUST edge around there with the TFS top end kit.

new Y303 from buyfordracing.com run like 800ish i believe.

 

[Skoobie]

1.85 intake/1.54 exhaust valves I believe. 60cc combustion chamber. Not sure on flow rates though.

 

[Skoobie]

aluminum heads will save you about 60 pounds. try to get a set with 58cc combustions chambers, since there are different models out. I HIGHLY doubt you will see 300+hp at the wheels with GT 40 heads, intake and other said bolt on. Most guys JUST edge around there with the TFS top end kit.

new Y303 from buyfordracing.com run like 800ish i believe.

Well Im running a cam among other things so you are correct, those alone will not get you to 300, but its a good start.

 

[IntenseBlue]

Y303 heads flow roughly 20cfm or more than GT40 "P" heads and 25-30cfm more than the original GT40s. They're aluminum which reduces weight. This is even better on a Mustang due to their nose-heavy weight distribution. They flow about the same as a GT40 intake manifold making them a very good intake/head match. Used sets can be had for as low as $600.

 

[89white50]

definitely good start.... im skipping the start and going for a beast.