ocnorb
IDIT
Just like the title says. How does one go about getting an accurate number?
I am guessing that the pre-injection cup volume + the volume of the chambers + the volume of the swirl chambers on the piston are all necessary to determine static compression. (in addition to bore, stroke and piston deck clearance.)
Anybody run the numbers on a stock IDI? I keep coming up with a total combustion chamber volume of about 35cc on a stock motor to get 22.38:1 compression.
Not sure I am doing the calcs correctly. Any help would be great. My motor is at the machine shop. Looking for a clear path forward after they tell me how much has to come off my heads and block deck.
I am guessing that the pre-injection cup volume + the volume of the chambers + the volume of the swirl chambers on the piston are all necessary to determine static compression. (in addition to bore, stroke and piston deck clearance.)
Anybody run the numbers on a stock IDI? I keep coming up with a total combustion chamber volume of about 35cc on a stock motor to get 22.38:1 compression.
Not sure I am doing the calcs correctly. Any help would be great. My motor is at the machine shop. Looking for a clear path forward after they tell me how much has to come off my heads and block deck.