Tech Tips/ Helpful Info.
Definitions: 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
Equations: 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.
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