calculating compression ratio
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Senior User
Joined: Mar 2003
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calculating compression ratio
How can I calculate the compression ratio of my 300 if I have stock 65.4-68.4 cc's in the EFI head and a zero decked block with stock pistons? Stock compression for my motor is 8.7:1. I need to find out the exact compression ratio with a zero decked block and stock head gasket. What other numbers do I need to know?
Thread Starter
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Senior User
Joined: Mar 2003
Posts: 105
Likes: 0
I found the compression ratio formula and a compression ratio calculator online. I plugged these numbers in.
Bore 4.03
Stroke 3.98
Head Gasket 0.56
Deck Height 0.00
Piston Top Volume 23.00 cc's
Combustion Chamber 65.00 cc's
CR is 9.34:1
I had to guess on the Piston Top Volume and Head Gasket compressed thickness. Does anyone know a ballpark number for these two values?
Bore 4.03
Stroke 3.98
Head Gasket 0.56
Deck Height 0.00
Piston Top Volume 23.00 cc's
Combustion Chamber 65.00 cc's
CR is 9.34:1
I had to guess on the Piston Top Volume and Head Gasket compressed thickness. Does anyone know a ballpark number for these two values?
