West Coast Dome Question

I have a West Coast head that has domes marked YEP 7030RS. Can someone tell me what compression this is and what octane is recommended? Thanks!!!
 

Big Kahuna

Administrator
Location
Tuscaloosa, AL
Good luck, Find Gordy on PWCToday, he may know. Best to just get a good quality gauge and get a baseline measurement. If your below 175 - 180 you ok on pump. But you need to measure squish also....... Someone else will need to chime in on clearance.
 
30cc ....oem head domes 70"30" head gasket 7cc = approx. 37cc depending on your altitude and what ski /engine you actually are running we then can determine your Compression..............
 
I was going to put it on a 94 SJ. I have a compression gauge. I just wanted to ask the community for information on the head before I started. Any tips? Thanks!
 
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