Rebored 30 over for KB167-030 pistons with these rings: Keith Black KB Performance Piston Ring Sets 3910BD8-030
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I did a leakdown test last winter and got a few weird readings on 2 cylinders. They'd read real low (20%) but spinning the engine back around to a second compression stroke and they'd read fine (90%+) so I'm definitely not ruling out some issues with rings sealing. I think you might have the LD test confused with a Compression test.... cuz 20% leakage is huge. During the compression test,the engine is starter-cranked over, with the carb at WOT,for as many times as it takes to get at least two consecutive same readings.
I'd rather not pull the heads at this point just to double check though.Pulling the heads before testing is a waste of time.
I don't think it's just a bad seal at the front of the intake since it seems to be finding quite a few points to leak. My front and rear seals on the oil pan are usually damp with oil as well along with the base of my oil filter. There's got to be too much pressure in there I just can't recreate it in a manner that I can observe it.Yeah it sounds worse by the post!
I was considering some kind of exhaust evac system but I felt like I was tackling a symptom of a bigger problem rather than addressing the problem itself.Correct thinking.
This is far from a radical engine so I wasn't really expecting many problems like this. This is my first engine build and break-in so it may be a little early to consider a bit of blowby a real issue. I'll probably pickup a Milodon road race oil pan in the short term if it'll work with my k-member and I've been eyeballing the new trickflow heads so I may get to do a complete teardown soonish anyways.
