Thread: Vacuum Pump Bypass Setting?
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Old 05-05-2013, 07:22 AM
  #2  
markdunlap
Senior Member
DYNO OPERATOR
 
Join Date: Jan 2004
Location: central Illinois
Posts: 459
Default Vacuum
My choice would be 12" max.

Too much vacuum and lubrication can be robbed from splash parts like wrist pins.

Otherwise, what ever makes highest dyno figures or fastest ET.
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