Weird fuel pressure
Here's what it means 67dart right from Aeromotive
"we do not sell a liquid or oil filled gauge due to their extreme sensitivity to temperature, i.e. when a liquid filled gauge warms up the liquid expands and pressurizes the case internally. This creates the illusion of falling fuel pressure, i.e. the gauge reads lower and lower pressure as it gets hotter and hotter.
Selling a dry gauge eliminates the pressure fluctuations on the gauge needle caused by temperature, but unfortunately, a dry gauge is more prone to damage by engine vibration. We recommend that you use the Aeromotive gauge for a reference when you are checking fuel pressure, but that you then remove it in order to prevent damage."
No idea what this is supposed to mean
The whole idea of a liquid gauge is to stabilize and dampen the movement. The insides of a gauge are actually pretty precision and delicate, like a watch. Constant pounding from some source that beats them to death will..........beat them to death
Not only that, but the tube (bourdon) that "makes them work" is essentially a piece of copper / brass tube that the pressure is trying t o straighten. If you pound it enough, it will "work harden" rendering the gauge useless and inaccurate
Here's what it means 67dart right from Aeromotive
"we do not sell a liquid or oil filled gauge due to their extreme sensitivity to temperature, i.e. when a liquid filled gauge warms up the liquid expands and pressurizes the case internally. This creates the illusion of falling fuel pressure, i.e. the gauge reads lower and lower pressure as it gets hotter and hotter.
Selling a dry gauge eliminates the pressure fluctuations on the gauge needle caused by temperature, but unfortunately, a dry gauge is more prone to damage by engine vibration. We recommend that you use the Aeromotive gauge for a reference when you are checking fuel pressure, but that you then remove it in order to prevent damage."
