How do I choose a cylinder head for performance?
There are many factors involved in choosing the optimum cylinder heads for a specific application, including:
- Engine displacement.
- Type of vehicle.
- Intended use.
- Desired compression ratio.
- Gear size.
- Other performance modifications.
What do performance cylinder heads do?
The cylinder heads determine the engine’s performance characteristics from idle all the way through to redline, not just in terms of outright power but in allowing the nature of power delivery that is sought.
Are Ford 302 heads interchangeable?
Like the 289 heads mentioned earlier, all 302 heads are the same except for Thermactor provisions. There’s also a truck head (C9TE-C), which employs a 58.2-cc chamber for slightly higher compression. Ultimately all 302 heads were carryovers of the 289 head, making them all interchangeable.
How do you calculate cylinder heads?
Unless you’re Superman, there is no physical way to visually inspect for flaws or feel a cylinder head for flatness, so the only correct way to measure your cylinder head is to use a straight edge and feeler gauge.
Does bigger valves mean more power?
Does Bigger Valves Mean More Power? It is typical for two smaller intake valves per cylinder to give more power than a single larger intake valve. Air flow increases in proportion to power by 30 percent as compared to valve valve area.
How can I make my head flow better?
The first is to back-cut the valves. Most valves have a wide, 45-degree-face angle. By narrowing that angle with an appropriate back-cut, you increase low-lift flow because there is less material for the air to flow around and there is a smoother transition on the backside of the valve.
How much horsepower can cylinder heads add?
You can add 35 to 40hp, maybe a little more, to stock heads if you know what you’re doing with them. Maybe a few folks out there can get more than that, but not without better, bigger valves, which don’t help much since the ports are too small to support them anyway.
What is a performer rpm head?
The Performer RPM Series heads provide excellent bolt-on performance for non-emissions 289, 302 & 351-Windsor engines. These heads are available with either 1.90″ or 2.02″ intake valves. The 1.90″ intake valves are for use with Stock Pistons, while the 2.02″ intake valves are for use with pistons that are notched for valve clearance.
What is an Edelbrock rpm cylinder head?
These Edelbrock Performer RPM aluminum cylinder heads feature threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability. They also feature hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal.
What kind of valves does a rpm head have?
The Performer RPM Series heads provide excellent bolt-on performance for non-emissions 289, 302 & 351-Windsor engines. These heads are available with either 1.90″ or 2.02″ intake valves.
What are the head bolt bushings for a Ford 289 engine?
Ford 289-302 engines require the use of head bolt bushings ( 350-9680 ). All bare heads come with valve guides and seats installed, but these heads will require final sizing and a valve job to match the valves being used.