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08-21-2021, 01:09 PM
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Senior Member
Join Date: May 2010
Posts: 5,315
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Re: Relieved Block
I have been fortunate to have had 2 new 59L blocks with the factory relief. Both were bored to 3 5/16th with 4 inch Merc cranks and the Offy 400 heads. I always figured the compression ratio at close to 9to1. Both seemed to operate alright on regular pump gas. I'm not smart enough to know if the relief helped or hindered their performance?
Last edited by Krylon32; 08-21-2021 at 01:17 PM. |
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