Chevrolet 427 L88 Dyno Pull

This 427 belongs to a 1968 Camaro SS. The car is originally an L78 car, but has had this 427 L88 since the early 70's. The car is true Day 2 car.

This engine has it's original steel crank, dimple rods, 12.5:1 compression, and a factory ZL1 camshaft. It has original GM 842 aluminum cylnider heads that were fitted with 2.30 intake valves (bowl blended for increased size). A GM 163 intake manifold (divider removed).

The only glitch in the dyno session was the ignition. This has a Roto-Faze point type distributor. As you can hear in the dyno pull, the points start to bounce at 6000 rpm.

Our original plan was to spin the engine to 7000 RPM. Obviously, that was not feasible with our ignition woes.

The engine with 40 degrees of timing responded with 575 hp @ 6000 RPM with 529 lb. ft. of torque @ 4700. Average HP from 4100-600 is 499.44 and average torque from the same range is 519.24