take head off and use water in a syringe in the chamber with the valves closed. should be anywhere between 65 ccs and 111 ccs, depending on the head... if you can find the stamping on the head (48, 6X, 15, etc) that can give you a really good idea what it should be, but they may have been milled to increase compression at some point, so ccing them is really the only way to be accurate.
if you make the combustion chamber smaller for example by shaving the heads when the sparkplugs ignites , the piston will get pushed down harder there for make your engine go faster .In short, reducing the combustion chamber size increases the combustion ratio which increasing the explosive force of the air fuel mixture when it burns. The negative side of this is fuel with a higher octane rating will have to be used to run the engine.
60cc
The chambers are 60cc. The heads are from 77-78 307 engine.
The combustion chamber size of the heads with the casting number 376450 is 60cc. It is possible to install larger valves.
76cc
Should be 74cc
1993 350 what? check auto.consumerguides.com
To reduce compression in an internal combustion engine you should change the standard pistons for a more flatter piston, which will increase the combustion chamber size, some people also change the standard head gasket for a slightly thicker one.
The combustion chamber size of a Chevy 350 stock head typically ranges from 64cc to 76cc, depending on the specific cylinder head casting.
Depends on the heads. The size is different for the exhaust valve and the intake valve, and different engines have different size valves. The valves are mechanical devices in the engine heads that open and close. The intake valve opens to let the air/gas mixture into the combustion chamber,. Both valves close the combustion chamber during the compression stroke, and the exhaust valve opens to let the burnt gas out during the exhaust stroke.
Bob sagget
There is no possible way to answer that question based on just PSI. Try googling compression ratio calculator. Once opening the first result you will need to enter your engine specifications to find out the answer. You will need to know the bore, stroke, gasket thickness, size of the combustion chamber and specs of the piston head to get an accurate answer. If you have a unmodified engine then it may be easier to search google and wikipedia for your specific engine to find the results.