Main Bearing Clearances
Hi all. I've started on the 383, and had a question in regard to main bearing clearances. For the first 3 main bearings, I've gotten measurements of .0015, .0018, and .002. Are the first 2 too tight? I contacted SCAT, and they said .0015 was at the bottom end, but still acceptable. I've seen conflicting info to that on multiple forums, so thought I'd consult you guys.
If they are too tight, two questions.
1. I see main bearings that are +.001 undersized, which would put me around .0025/.0028 for the first two. Is that a viable alternative, or is there something else I can do t save the $100 on new bearings.
2. If new bearings are in order, can I mix sizes, where I keep the third bearing in place at .002.
Again, the engine is for street, not strip.
First time with an engine build, so learning the ropes.
67 Black RS Coupe, 383, M21 & 10 Bolt Posi. Edelbrock E-Tech 170 Heads, 2204 Roller Cam, Air Gap Intake.
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