I left the 30# one in mine. It reads zero when engine is off and is usually pegged at 30 when running. It drops a smidge below 30 when fully warmed up and idling. As long as it continues to do these things, I'm going to leave it.


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission