What should the compression ratio be on a 454?

Discussion in ‘ Engine Topic ‘ started by MartinD, Feb 17, 2011 . About to redo the 454 in my Chevy C-20 and need some tips. The current engine is around 8:1 compression and I would like to be around 9 or 9.5. Im assuming it has big chamber heads on it.

What kind of engine did the Chevy 454 have?

The truck 454 used smaller oval port-shaped intake ports with small valves which promoted low revolution-per-minute (rpm) power and torque rather than “all-out” high rpm horsepower. The camshaft was a hydraulic flat-tappet, low-lift, short-duration design that improved torque output at a lower-rpm range than performance grinds.

What are the specifications of a 1978 Chevy 454?

1978 Chevrolet 454 Specifications. 1 Engine Block Design. Original designed in the early 1960s, all big block Chevy engines were based on an eight-cylinder, 90-degree V configuration. 2 Cylinder Heads, Intake and Cam. 3 Power Output. 4 Performance Enhancements.

How many horsepower does a 1970 Ford 454ci have?

1 Horsepower: 390 hp @ 4,800 rpm 2 Torque: 500 lb.-ft @ 3,400 rpm 3 Compression Ratio: 10.25:1 4 Displacement: 454CI (7.44L) 5 Cylinder Bore: 4.251” (107.98 mm) 6 Stroke: 4.00” (101.6 mm)

How much horsepower does a 454 cubic inch engine have?

Not all factory production heads are suited to high horsepower production; however, there are several choices available from aftermarket vendors. Generally speaking, a head with 290 to 320 cc intake port volumes will allow high RPM airflow and maximum horsepower outputs in a 454-cubic inch engine.

When did GM start making the 454 engine?

by Moss Strohem. General Motors (GM) produced the 454 engine from 1970 until 2001. GM initially used the 454 big-block Chevy (BBC) in Chevrolet’s high-performance and full-size passenger cars and then added it as an engine option in 1973 and later Chevrolet and GMC trucks. GM developed variations of the BBC known as Mark IV, Gen V and Gen VI.