How much power can a stock 454 block handle?
600 hpWhere a particular engine falls depends on many factors, so we'll use 1.3 hp per cubic inch as a middle figure. That means a 454 can support almost 600 hp (454 x 1.3 = 590.2). Indeed, many do. Using the same multiplier, a 496 can support 645 hp.
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.
What size heads for 454?
Performer RPM 454-R heads have rectangular 315/300-cc (long/short) intake ports and 118-cc open chambers.
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.
Are BBC heads interchangeable?
The only OEM blocks with these bosses were the rare ZL1 aluminum blocks, but many modern aftermarket blocks have this added feature. Mark IV, Gen V and Gen VI heads all have the same head bolt pattern, but they are not interchangeable due to different water jacket cooling passages.
Does AFR cast their own heads?
All of the Enforcer cylinder heads are manufactured using permanent-mold castings and feature the as-cast surface finish on the intake and exhaust runner walls and combustion chambers.
Can you put 454 heads on a 396?
For example, tossing a set of 454 open-chamber heads on a 396 could radically reduce the compression ratio because of the roughly 10cc larger chamber on a short-stroke engine. Production big-blocks all the way into the mid '90s were always flat tappet camshaft engines.
What are Chevy Snowflake heads?
With the casting number 3904392, this aluminum head was used on 1967 L88 and L89 engines. The "snowflake" denotes it was cast at the Winters foundry. 3965198: '68 and '69 oval port, closed chamber, 2.06- and 1.72-inch valves. Used on 396ci truck engines.
Are brodix heads any good?
Usually, big performance heads give up a little downstairs for midrange and top-end improvements, but in this case, Brodix proved superior at every lift point on both the intake and exhaust sides, from off the seat through 0.800-inch lift.
What degree are big chief heads?
Big Chief Pro1 18°/14° 424cc Heads.
What is a Big Chief engine?
The fiberglass front end and doors peel away in a flash, revealing its latest powertrain configuration—an especially tasty 482 twin-turbocharged Pontiac engine, probably the smallest displacement of all the cars regularly appearing on Street Outlaws.