How much horsepower will 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.
What is better GT40 or GT40P heads?
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.
Are GT40 heads good?
If you can obtain them inexpensively, GT40 heads are dependable and have improved flow when compared to the E7s. However, though they were once available in just about every junkyard, it’s become more difficult to find GT40s in good condition.
How can you tell GT40 from GT40P heads?
The gt40 p-head has a smaller exhaust valve than the gt40.
How much HP does a E303 Cam add?
Equipped with the E303 cam, the peak numbers jumped up to and even 400 hp (technically 399.9 hp) and 376 lb. -ft. of torque. As we have come to expect from past testing, the E cam offered solid gains through most of the power curve, from as low as 2,500 rpm on up.
What car came with GT40 heads?
Which Vehicles Had GT40 Heads? The GT40 heads can be found specifically on the 1993-1995 SVT Cobra Mustang as well as the 1993-1995 SVT Lightning. These can also be found on the 1996-Mid 1997 Ford Explorer & Mercury Mountaineer SUV.
How many cc are GT40 heads?
GT40 & GT40P Head Specs
|Head Type||Intake Port||Combustion Chamber|
|GT40 – Explorer||145cc||65cc|
|GT40 – Cobra||145cc||61cc|
How many cc are GT40P heads?
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 do I identify a Ford cylinder head?
1 Look for three different locations where your Ford cylinder head code number will be located: on top of the head under the valve cover; on the bottom of the head, requiring the head to be removed; and on the side of the head just under the valve cover lip.
What size valves are in GT40P heads?
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.
What came with GT40 heads?
How do you tell if I have a Romeo or Windsor?
The Windsor engine can be distinguished from Romeo blocks by looking for a “W” stamp on the block. Most Windsor engines feature an 8 bolt crankshaft and require 8 bolt flywheels. Windsor heads can be distinguished by a 13/14 bolt valve cover bolt pattern.
How can you tell the difference between a 2v and 4v head?
Some ways to identify Ford 351 Cleveland 2V and 4V heads
What is the difference between a 4.6 Romeo and a 4.6 Windsor?
How do I identify a Ford 4.6 engine?
Determining Engine Type By VIN:
VIN 3 for the Ford trucks refers to the supercharged SOHC Lightning engine. VIN 6 refers to 4.6L SOHC Windsor produced engines. VIN W refers to 4.6L SOHC Romeo produced engines. VIN X refers to 4.6L SOHC Windsor produced Mustang engines.
Which is better 2V or 4V engine?
2V means there is one intake and one exhaust valve and 4V means there are 2 valves for both intake and exhaust. 4V engines can provide very linear fuel and precise fuel as per throttle and are preferred for performance oriented vehicles.
What does 2V heads mean?
A: Starting with the basics, 2V heads are designed for use with a factory 2-barrel carburetor option (2V = 2 venturi), while 4V heads came on one of the five Ford 351C engine configurations that came with a 4-barrel carburetor (4V = 4 venturi).
What is a Ford 4.6 liter engine?
The Ford 4.6L engine is a naturally aspirated V8 from Ford Motor was used to power a variety of different vehicles like sports cars, pickup trucks, sport utility vehicles, luxury sedans and cargo vans.
How much HP can a 4.6 V8 handle?
For 4.6 engines with 2 valve heads (2 valves per cylinder), the power limit is around 400 rwhp. This is for both NPI and PI models (1996-1998 and 1999-2004). On 3 valve engines (2005-2010), the power limit is increased slightly to around 450 rwhp.
What year did the 3 valve 4.6 come out?
The 3-valve SOHC 4.6 L with variable camshaft timing (VCT) first appeared in the redesigned 2005 Ford Mustang.
How can you tell if a head is 2V or 4v?
What does 4v mean on an engine?
4 valves in
4v means 4 valves in engine.
How can you tell if a head is 2V or 4V?
What year 4.6 had the spark plug problems?
Design News readers have commented about having to lift engines or make holes in the car body to change spark plugs. This article describes a particularly frustrating spark plug issue with the 2004-2008 Ford 4.6-liter, 5.4-liter, and 6.8-liter 3-valve “modular” engines.
How much HP can a 4.6 2v make?
For 4.6 engines with 2 valve heads (2 valves per cylinder), the power limit is around 400 rwhp.