
02-04-2019, 09:43 PM
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CC Member
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Join Date: Sep 2002
Location: Grand Rapids,
MI
Cobra Make, Engine: FFR Challenge Car, RDI aluminum 427w
Posts: 357
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Not Ranked
I'd guess that the psi rating is not determined by the gauge rating but by the elastic capabilities of the diaphragm/isolator and the pressure ratings of the plumbing and connectors.
The Auto-Meter unit I have uses antifreeze from the diaphragm to the gauge. It's an all liquid system.
Jim
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