Thread: Fuel vent

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The vacume numbers divided by 2 is a good guide line for the power valve--------But--with all you issues, you need to be sure that possibly a back fire pop or two hasn't blown out the diaphragm in the PV.

If your into your carb, check your floats-if they are brass make sure that they aren't leaking and partally filled with fuel which will make them JUNK-if they are the nitol plastic type ones they are probably ok-check that they aren't rubbing on anything because they are bent, etc------If your carb has any of those jet extender tubes make sure the bottom of the floats have the clearance notches for them.

From your pic----I think where you have the regulator mounted makes the lines to the float housing bent/twisted too much and may restrict fuel at higher flow ( of course now we are trying to slow fuel down) No matter what type of guage you have it will show the pressure that is there relative to outside atmospheric pressure irregarlis to whether the guage is liguid filled or not-------I DO NOT recommend liguid filled gauges for any application. People seem to want them to dampen fluation of the needle but the needle movement is because of the pressure it is seeing.

Also-I see that your feed line up to the engine is laying on the head?????? nice way to warm the fuel up to 240*--------I'm thinking you probably should start reconsidering your complete fuel system routing and configuration