Deck Height Calculator Vw
To determine the deck height required for a 2007cc engine with a compression ratio of 8 5 1 and cylinder heads with a combustion chamber volume of 56cc plug in the following numbers.
Deck height calculator vw. A standard deck small block chevy is 9 025 but there are plenty of variations when it comes to aftermarket blocks and used cores. The piston can t stick out past the edge of the cylinder otherwise the piston will hit the cylinder head. Inches input you rod length stroke and block height please. Inches finished block height.
This measurement is one component in the cr formula. The positive or negative value must be reversed when this number is used to calculate compresion ratio. The distance from the crank centerline to the deck surface of the block. After doing some calculations i determined that i need an overall positive deck height of 060 inches to get my desired 10 1 compression ratio so that means that my cylinder spacer needs to be 260 inches thick 200 060 260.
Bore 90 5mm stroke 78mm combustion chamber volume 56cc and desired compression ratio 8 5. Bore 94mm stroke 82mm combustion chamber volume 57cc and desired compression ratio 8 5. Inches piston pin height. Engine calculator to determine the deck height required for a 2276cc engine with a compression ratio of 8 5 1 and cylinder heads with a combustion chamber volume of 57cc plug in the following numbers.
Deck height is simple. Deck height the distance measured in thousandths of an inch between the top of the piston and the top edge of the cylinder. Deck height is the measurement from the top of the piston to the top of the cylinder. Aircooled vw engines must have zero deck height or more.
With 060 deck height my compression ratio will be 9 8 1. Cylinder shims can be used to increase the deck height to raise or lower the compression.