Thread: Cheap Boost Gage
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  #20  
Old 06-12-2017, 10:47 PM
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mach4 mach4 is offline
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Location: San Diego County, CA
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Quote:
Originally Posted by sixto View Post
Clogged air filter warning?
The air filter minders turn red at 25 inches of water, which is equal to 1.84 in-Hg ( or .8 psi)....not very visible on a typical automotive vacuum gauge.
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