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Old 01-24-2026, 01:39 PM   #26
J Franklin
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Thumbs up Re: This might slow my oil burning

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Quote:
Originally Posted by Bored&Stroked View Post
Another major reason for very heavy weight oil in full-on alky and nitro motors is related to having huge bearing clearances. Where we might run .002 on a high-performance street engine (.001 per inch of journal diameter),
You jogged my memory of a fully machined 283 305HP Corvette Engine I bought from a hot rod friend. Unbeknownst to me it had been blueprinted and clearanced for racing. When I put it together with a new stock oil-pump and fired it up, I couldn't figure why there was so little oil pressure. Even after changing to a high output pump it still read quite low at idle with regular weight oil. It made my '57 Chevrolet go like a bat out of hell. On the Dyno it put out more than 1 HP per CI! I think it was 335 HP.
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