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Bore-- The diameter of the cylinder bore

Stroke-- The distance the piston travels in the cylinder

Deck Height-- The distance between the top of the cylinder bore and the top of the piston, when the piston is at TDC (Top Dead Center, or at its highest position

Compressed thickness of the head gasket-- Usually 0.040", but varies with gasket manufacturer and application

Piston top volume-- If the piston is dished, domed, or dimpled, that has an affect on compression ratio.

Combustion chamber volume-- How much open space is in the head above the cylinder


Displacement = (Bore ÷ 2)2 x 3.14 x Stroke x 16.387
Head Gasket space = (Bore ÷ 2)2 x 3.14 x Gasket thickness x 16.387064
Deck Height space = (Bore ÷ 2)2 x 3.14 x Deck Height x 16.387064
Compressed Volume = Head Gasket space + Deck Height space + Piston Top volume + Combustion chamber volume
Uncompressed Volume = Compressed Volume + Displacement
Compression Ratio = Uncompressed volume ÷ Compressed volume
Horsepower = Torque x RPM / 5,252 

Torque = Horsepower x 5,252 / RPM 

CFM = Rpm x Cubic inch / 3,456 x 1.1 



How to determine driveshaft length:

With the weight of the car on the suspension slide your slip yoke in to the transmission till it bottoms out. The pull it out one inch. Measure  from the center of the u-joint on that yoke to the center of the u-joint on the gear yoke.

Muscle Motorsports Inc   Huntersville NC USA  28078  Phone: (877) 668-7253 Local: (704)948-1040 


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