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Nitemare Performance Dyno Laboratory
Where our motors come to life!

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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!


HP & Torque from our Pump-Friendly Stroker
RPMHPLBS-FT
3600343.9504.8
3700358.7509.2
3800368.5509.1
3900379.9511.7
4000391.6514.2
4100401.8514.8
4200412.0515.4
4300422.2515.8
4400431.8515.5
4500441.1514.7
4600449.4512.9
4700455.9509.4
4800461.3504.8
4900466.4500.0
5000470.0493.8
5100472.4486.5
5200475.1479.9
5300477.0472.7
5400476.9463.8
5500476.1454.7
5600472.0442.7
5700459.8422.8
 
Custom 455 Ram Air IV

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.


HP & Torque from our 455 ci Ram Air IV
RPMHPLBS-FT
3500341.0505.7
3600345.1504.9
3700355.5504.7
3800366.0505.8
3900378.1509.3
4000391.7514.5
4100406.3520.7
4200420.7526.2
4300433.8529.9
4400445.7531.9
4500456.8533.1
4600467.8534.3
4700478.3534.5
4800487.0532.9
4900494.4530.1
5000500.2525.4
5100503.4518.3
5200504.9509.9
5300506.9502.3
5400509.4495.5
5500510.7487.7
5600510.0478.3
5700507.2467.3
5700503.4455.8
5700499.5444.5
5700493.1430.8
 
Solid, Flat-Tappet Stroker

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.




Edelbrock-Equipped 455

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.


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