Quote:

The fuel isolators might not show a 1 or 2 psi fluctuation quickly enough for low pressure use, but for EFI stuff it is worth it's weight in gold. I regularly put 150 psi of pressure thru my fuel system. The electric sending units cannot handle that kind of pressure, and are VERY scary when they fail.

Ever seen fuel boil while being sprayed directly onto the headers and not catch fire? No sparks allowed.



Mine doesnt use a electrical sender its a mech gauge
one psi in on the one side of the diaphram and one
psi on the other side of the diaghram to the gauge.
One thing thats real important with this style of
unit is the side going to the gauge is filled with
glycerin and its VERY important that its FULL otherwise
you will compress the air thats in there