Savannah Fuel Pressure SteamGauge Anomaly

[IBob]

A significant number of builds report the same problem: fuel pressure shows okay on the ground, but appears to diminish with altitude.
 

There is generally nothing wrong with either the gauge or the fuel pressure. The problem is that the gauge needs a static port, so that air pressure inside the gauge is able to change with changes in altitude.

 

The top of the gauge body, behind the panel, has a little rubber bung in it, and the quick fix is to just pop this out.
A better fix would be to then install some sort of filter in it's place, to prevent the ingress of dust & bugs.

[Blueadventures]

20 minutes ago, IBob said:

A significant number of builds report the same problem: fuel pressure shows okay on the ground, but appears to diminish with altitude.
 

There is generally nothing wrong with either the gauge or the fuel pressure. The problem is that the gauge needs a static port, so that air pressure inside the gauge is able to change with changes in altitude.

 

The top of the gauge body, behind the panel, has a little rubber bung in it, and the quick fix is to just pop this out.
A better fix would be to then install some sort of filter in it's place, to prevent the ingress of dust & bugs.

Looks like you got yourself a job🙂

[Thruster88]

These mechanical pressure gauge plugs have a small protrusion in the plug which should be sliced off leaving a small hole when the gauge is put in service. They are plugged so as not to leak damping fluid while in transit.  

[Savannah Africa]

On the back of the fuel pressure gauge on top is a rubber bung, you need to remove the bung and drill a small hole into it to equalize the air pressure inside the instrument. Doing this will stop the pressure drop as you climb higher. The internals are very sensitive to air pressure.