How much HP do GT40 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’s the difference between GT40 and GT40P heads?

Finally, the last difference between the two are valves. Both have 1.84″ intake valves, but the GT40 has a 1.54″ exhaust valve whilst the GT40P cylinder heads have a slightly smaller one at 1.46″. The GT40P does have a slight edge over the GT40 cylinder head because of its smaller chamber volume.

Can you put 4v heads on a 2v block?

It is not worth putting 4v heads on a 2v motor. after you spend all the money to get the necessary parts, and the time and effort you may have just bought a 4v motor.

Are GT40P heads any good?

Registered. They are good entry-level heads to replace the E7TE’s and work a tad bit better than the GT40 heads in stock trim.

Can you put 351W heads on a 302?

351w on a 289/302 will work just fine. getting the comp ratio correct is where you’ll have to do measuring and math. valve size remember the standard 289/302 intake valve relief on the piston is 1.78′.

What’s the difference between PI heads and non PI heads?

One difference between the non-PI and PI heads is the camshaft profile. The non-PI heads came with a camshaft profile of roughly . 480 inches lift on the intake and exhaust side. The valve duration at .

What kind of cylinder head does a Ford GT40 have?

Modern vs Fox Body Mustang Cylinder Heads Cylinder Head Intake Port Combustion Chamber Intake Valve Edelbrock Victor Jr. 210cc 60cc 2.05” Trick Flow 11R 190cc 56cc 2.05” Edelbrock Performer 170cc 60cc 1.9” Ford Performance 204cc 63cc 2.08”

What kind of performance do they give GT40P heads?

However realistically, with the amount of money spent modifying the gt40p heads or even those older 289 & 351w heads, you could have even better performing aluminum heads. Generally expect with a good cam, intake, roller rockers and a good ignition system to see around 300-350 max rear wheel horsepower, depending on what type of dyno you use.

How big is the intake valve on a Ford GT40?

The intake valve diameter gives you a rough idea of the flow potential through a cylinder head.

How much horsepower does a Ford GT40 have?

Ultimately, when people have ported their E7s they’ve been able to achieve between 20 and 40 horsepower, which is, once again, nothing to sneeze at and about as good as the GT40s would be able to achieve but ultimately is outclassed pretty quickly by modern improvements to cylinder head flow.