What size valves do GT40P heads have?

The GT40 valve sizes are 1.85/1.54 for the intake and exhaust, while the GT40P went to a smaller 1.46-inch exhaust valve. There were other changes to the GT40P, including a slightly smaller combustion chamber reduced from 65 cc to roughly 60, which benefits the compression ratio.

How much horsepower do GT40P heads add?

While we’ve seen engine dyno tests performed with GT-40P heads replacing factory E7TE castings and resulting in a boost of more than 25 hp, we have reluctantly set our horsepower gain goal at 25 ponies, as well. The reason for this is that we’re actually replacing mildly worked E7TE heads.

What heads are better GT40 or GT40P?

GT40 vs GT40P, which are better? Really, when you get down to it, neither head is any measurable difference better than the other. The GT40P does have a slight edge over the GT40 cylinder head because of its smaller chamber volume. The smaller combustion chamber can net a bit more compression, but only marginally.

Will gt40p headers fit gt40 heads?

gt40p heads have the spark plug coming out at a different angle so regular headers won’t work. gt40 heads have the same angle as all the others.

What is a good cam for gt40 heads?

cam with cobra roller rockers is a great combo with GT40 heads. The H.O. cam has a little better grind when combined with the 1.7 ratio cobra rockers giving you more hp/tq than the cobra cam setup.

How do you tell if you have GT40P heads?

How to Identify GT40 Cast Iron Heads

Open the hood and look for the casting bars at the front of each cylinder head. When installed, the front of the cylinder head points forward of the vehicle.
Look on the sides of the cylinder heads.
Locate the Ford casting number for further identification.

What year Explorers have GT40P heads?

explorer gt40 heads?? But 1996 was the first year they started using the 5.0, up through 2001.

Are E7TE heads good?

The E7TE heads are better than the older small block heads, but you’d be better off finding a set of pre-“P” Gt40 iron heads or the early 351 Windsor heads, casting numbers are C9OE and D0OE.

Will long tube headers work with GT40P heads?

I’m using MAC longtubes. They were not designed for GT40P heads but they will work. You will need 90° boots.