kharless Posted May 10, 2006 Share Posted May 10, 2006 I recently had my motor rebuilt by my local Mack dealer. My boost gauge shows 17 psi maximum. Allentown Mack said this is good as well as my local Mack dealer. However, a good friend of mine who has been running Macks successfully for 30+ years has told me that I should boost 23 psi minimum. Who is correct here? My turbo is new. Quote Link to comment Share on other sites More sharing options...
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