Typical Fuel Pressure?
Liquid-filled fuel pressure gauges are known to be problematic like that. Not sure what ever drove the need to have them in the first place. If it was needle bouncing, it seems like a well-functioning pressure regulator solves that issue.
I have an Aeromotive pump with a Holley old-school regulator. I set my fuel pressure to just under 6 psi where it stays no matter the temp or driving demands, track or street. I use this 0-15 psi AutoMeter Sport-Comp gauge out on my cowl (bad pic quality taken through the windshield!):
Liquid-filled fuel pressure gauges are known to be problematic like that. Not sure what ever drove the need to have them in the first place. If it was needle bouncing, it seems like a well-functioning pressure regulator solves that issue.
I have an Aeromotive pump with a Holley old-school regulator. I set my fuel pressure to just under 6 psi where it stays no matter the temp or driving demands, track or street. I use this 0-15 psi AutoMeter Sport-Comp gauge out on my cowl (bad pic quality taken through the windshield!):