Cylinder head combustion chamber???

[Mike H]

Ok guys, need some technical help here. What is the stock cylinder head combustion chamber volume in CC??? I see that in the SVGT speedvision series the Viper heads can have a 78.0 CC total cylinder head combustion chamber volume and a TOTAL combustion chamber volume of 97.338 CC. I think 73 CC is Stock for the cylinder head? So what does this mean? It also allows for 48.8 mm valve head diameter and 40.1 mm exhaust valve diameter. Is that equal to the 2.02 valves versus the stock 1.92?

Jon B? you out there? Or Tom Welch??

 

[Doug Supercharged Vipers]

Mike -

About 74/73 CC for the stock heads provided they are stock. Yes, the 2.02 intake valves are the "oversized" valves and fit in the stock heads if the seats are cut.

Regards,
Doug

 

[Mike H]

Thanks Doug, but what then am I allowed to do to the heads to reach those combustion #'s and is the 2.02 equal to that 48.8 MM number?
Thanks....

 

[JonB]

Dodge's spec is 74cc combustion chamber volume.

48.8 mm = 1.92 stock intake valve size.
51.0 mm = 2.02 oversize