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PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > Help in selecting rod & main bearings
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Old 07-24-2014, 08:00 PM
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PunchT37 PunchT37 is offline
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Clevite, P series, full grove, is ok on the non cross drilled 400 factory crank.

1/2 grove on the 3.25 cranks that are cross drilled.

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Old 07-24-2014, 08:13 PM
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PunchT37 PunchT37 is offline
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A decent read. Check out the discussion further down;

Basically, 180 or 1/2 grooves give better loading without starving the rods.

http://www.vandervell.co.uk/images/s...gPerforman.pdf

Last edited by PunchT37; 07-24-2014 at 09:05 PM.
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