Spoke with Ray Barton today about the ring gap and bearing clearance. He suggested .018 on top ring and .035 on second. Said he has ran many motors that way and some to 10,000rpm and never an issue. I'm reading .015 is all thats needed on the oil ring.
The rest of the combo will be Stage V twin carb intake that i had drilled for carbs to set sideways and will have 2 850 Thumpercarbs. Heads are Stage V fully done up by FHO and flow 442cfm@.700. The cam is a Bullet solid roller with 275/278@50 and .736 lift on a 110. Compression was suppose to be 12:1, but my numbers calculated are showing 11:1. I will have to double check that. Just assembling the short block for now. Will finish in a year or two when im retired.
I understand the theory behind bigger second ring gap but wow! That's a lot.
Fwiw I ended up lower than intended compression as well. At the end of my build I checked piston to head clearance with solder and was able to bump it up with a thinner gasket. (and also smaller bore gasket).
To that I mean, I have a 4.31 bore and ended up ordering gaskets for a 4.28 bore with Cometic......
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