What degree are stock BBC heads?
What degree are stock BBC heads?
Jason Neugent: From the factory, stock 26-degree big-block Chevy heads don’t offer the best architecture from an airflow standpoint, but the design has been highly refined over the years. Their strength is in their popularity, and therefore all the off-the-shelf parts that are built around it.
How do I identify my GM heads?
See “A” in the picture General Motors. The casting number of a GM cylinder head is located between the valve springs. It’s a long number of 6 to 8 digits. See “A” in the picture General Motors.
How much does a BBC with aluminum heads weigh?
The lightweight all aluminum motor is 389 pounds. The all iron big block is 754 pounds : with aluminum heads 660 pounds.
How do I choose the right cylinder head?
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.
Are big block Chevy heads interchangeable?
In terms of interchangeability, the biggest concern is chamber compatibility with the pistons and ensuring the compression ratio meets your needs. One thing to keep in mind is that closed chamber heads cannot be used on an engine with domed, open chamber pistons because the dome will physically hit the head.
Who makes Big Chief heads?
These Big Chief cylinder heads from Dart put Pro Stock technology within the reach of every racer and engine builder.
How do I know if my Chevy has a double hump head?
These heads got their nickname because of the raised identification shape on the each end. It’s two half-ovals connected by a straight bar-most easily described as “two humps.” Some of these are also nicknamed “Fuelie” heads because a version appeared on fuel-injected 327-powered Chevy Corvettes.
How much wider is a BBC than a SBC?
The BBC is taller and longer than a SBC, but the 1.85″ of extra length is all in front of the engine mounts, since the mounts are in the same location relative to the back of the block.