Personally I wouldn't have done it as the 7M needs all the help it can get to ward off knock, don't know if you saw the pics but I sliced up a head before I had mine ported to check wall thicknesses.
No need to go back to lurking you have knowledge that can help the guys why not share?
Group A race engines ran this configuration, at a guess I'd say they were based on production castings.
I'm not saying it's right or wrong just that it exists and my point was it's been done and worked, my other point is it's important that the chambers be equal volume.
For the hard breakin method you want to be 110% certain of ALL the critical clearences like ring end gap piston to bore and bearings or it will nip up and do damage.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.