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Old 02-04-2013, 12:02 PM   #2
WALKD U
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Join Date: Jan 2008
Location: Ridgeland, MS
Posts: 5,429
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C38-81 max impeller speed is 90k rpm.

Think you be passing that with a 70mm and will have tons of issues with belt slipping. (I have this issue with 85mm pulley,
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