boost guage- y vaccum reading? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

autobahNESSA · 11-12-2003, 07:57 PM

Just curious, why does the boost guage have a vaccum reading?
Mine is hooked up through the wastegate line and all I see is boost. -which I expect.
But then how come the boost guage has vaccum and boost combined on it? Its an auto meter.

In order for it to read vaccum would it have to be hooked directly into the manifold? I think at idle inside the manifold it might read a vaccum but I'm not sure.

Can someone give some insight thanks.

11-12-2003, 07:57 PM	#1
autobahNESSA Zilvia FREAK! Join Date: Aug 2002 Location: Milpitas/Irvine, CA Posts: 1,257 Trader Rating: (3) Feedback Score: 3 reviews	boost guage- y vaccum reading? Just curious, why does the boost guage have a vaccum reading? Mine is hooked up through the wastegate line and all I see is boost. -which I expect. But then how come the boost guage has vaccum and boost combined on it? Its an auto meter. In order for it to read vaccum would it have to be hooked directly into the manifold? I think at idle inside the manifold it might read a vaccum but I'm not sure. Can someone give some insight thanks.