07-02-2026, 03:11 PM
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Ultimate Warrior
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Join Date: Feb 2000
Location: NH
Posts: 3,562
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Quote:
Originally Posted by mgarblik
I believe you will find that a set of -.001 bearings are what you need to tighten up the clearance a little. This is based on a crankshaft that was ground small, say 2.4992" as an example. The same way a -.010 bearing is made for a crankshaft ground to a nominal 2.490". To get extra oil clearance, you would need a bearing marked "X" for extra, or some mark them +.001 for a crankshaft that is too large like 2.5008" for example. Either way, I think both are available. Just a little harder to find for a Pontiac. Good luck with your build. I also wish you had a nominal 2.200 rod journal. I keep STD., +.001, -.001, -.009, -.010, -.011 in stock here.
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Got it. On Butler's site it stated," -0.001" extra clearance." If that means it will tighten up the clearance I'll get them.
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1967 Firechicken, 499", Edl heads, 262/ [email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. [email protected] mph with a 1.45 60'. Still WAY under the rollbar rule.
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