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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 in the 500-horsepower range to race engines putting out 750 horsepower or more.

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
 
HP Stroker

Based on our proven, 462-cubic-inch Pump Friendly Stroker, we cranked up the compression to 10.1:1, loaded it with our NM3 hydraulic flat tappet camshaft, then fit 1.65:1 rockers to a set of our Stage 2 ported cast iron Pontiac "62" heads, which resulted in a combination that remains streetable on "Premium" 92-94 octane pump gas yet produces an astounding 492.2 horsepower and 552.9 lbs-ft of torque!


HP & Torque from our HP Stroker
RPMHPLBS-FT
3600372.6545.1
3700392.6557.1
3800401.7554.9
3900409.5551.4
4000420.9552.9
4100432.1553.5
4200441.9552.7
4300451.4551.5
4400458.3547.0
4500462.4539.7
4600468.6535.1
4700477.3533.5
4800484.2530.0
4900489.3524.6
5000492.2516.9
5100491.7506.4
5200490.0494.9
5300489.3484.9
5400487.8474.5
5500486.5464.5
5600483.0452.8
5700444.8409.6
 
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.

 
Let us build one for your Pontiac!

Whether you're restoring a Grand Prix, building a modified GTO, or putting together a track-attack Firebird, we can assemble an ideal pure Pontiac engine to exceeds your expectations.

Check out our Crate Engines page for info about some of our standard offerings.

And learn more about how we build the ultimate Pontiac V8 — Yours.


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