At Nitemare Performance, we build Pontiac motors with a wide range of performance levels, from 400 horsepower 'grocery getters' to streetable engines generating in excess of 750 horsepower.

Our crate engines are dyno-proven and many of our customers swear by them for their performance, reliability, and value. But some folks need their Pontiac's engine rebuilt and restored to its factory-original condition, while others may need a custom combination of components to meet racing class rules or to gain an edge in competition. Whatever your Pontiac engine needs may be, Nitemare Performance can accommodate them.

Pump-Friendly Stroker

Our Pump-Friendly Stroker starts with an iron, Pontiac 400-inch block, but is bored and stroked to 462 cubic inches. Stage 2 ported cast iron Pontiac 4X heads, 9.3:1 compression, and our NM3 hydraulic flat-tappet camshaft help it develop 477 hp and 515 lbs-ft of torque on regular, 87-octane pump gas! Check out the practically-flat torque "curve" on dyno results, below!

A customer challenged us to put together a high-performance 455 for them that would also be rock-solid reliable. Our solution was to build a custom, 455-inch Ram Air IV engine featuring 9.9:1 forged pistons, our Nitemare NM4 cam and Stage II Ram Air IV round-port (#722) heads, a Torker II intake and an 850-cfm carb, among other specially selected and prepared parts. Judging by its dyno numbers (below), we'd say it delivers.

Our Solid Flat-Tappet Stroker Motor is based on a 400 ci block, but displaces 462 ci. It has a compression ratio of 10.4:1, a 0.600"-lift custom-ground flat-tappet camshaft, an Edelbrock Torker II intake, and Edelbrock heads. This motor runs on pump gasoline, idles at 1100 RPM and runs best on the street with up to a 10-inch torque converter. View the Stroker Motor dyno specs.

Our Edelbrock 455 Street Motor utilizes a stock-stroke crank & stock-length rods, 455 block and Edelbrock heads. It has a displacement of 461 ci, a compression ratio of 9.8:1, a 0.666" lift solid roller camshaft and a Nitemare-ported intake. This motor also runs on pump gasoline, idles at 1200 RPM and runs best on the street with a tight 8-inch torque converter. View the Edelbrock 455 dyno specs.