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    1. 10-19-2010 #1
      Larry Callahan's Avatar
      Larry Callahan
      Larry Callahan is offline Administrator
      Join Date
      Jan 2000
      Location
      Thousand Oaks California
      Posts
      10,190
      Country Flag: United States

      Engine vacuum. How much vacuum does your engine pull rolling down the freeway?

      I have always suspected the vacuum gauge in my dash was wrong. I'm running twin turbos and a can that should pull a lot of vacuum but I doubt in the high 20's on flat level ground at 65mph.

      When going down hill with the throttle closed it runs very very close to 30"



      Does that sound right?
      Larry Callahan
      Founder/Administrator of Pro-Touring.com, G-Machines.com and HostMyJunk.com
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