hi fellas! can anyone help with a cupla questions about standard mechanical fuel pump ?
when setting / checking fuel pressure should the gauge be tee'd or is it ok to plug straight into the fuel line and run the engine off fuel bowl
while taking the reading? i am getting about 7 psi this way.
any idea how much difference in fuel pressure one gasket is likely to make? need to reduce it to 3psi.
thanks in anticipation
phil
Well, plugging straight in like that isn't the best way of doing it, but it'll work.
Blocking the fuel pump outlet like that the pressure the gauge sees will be the same as what the float valve in the carb would have to overcome to
shut off the fuel. Weber's & Dell's both don't like more than 3.5 - 4 psi (suspect you know this already tho hey)
I'd only be guessing how much difference one gasket would make... it depends on the clearances you have there currently.. but why not do iti properly
and install a pressure regulator with a gauge on iti ??? That gives you complete adjustability...
Hi
I have read where a Beetle fuel pump can pump at excessive pressures 7 psi is excessive... lol
I have a fuel pressure gauge screwed into My fuel pressure regulator...
I have it set around 2 psi...
I am using an electric fuel pump too....
I would guess You would need a few gaskets to get down to 3 psi...
maybe find a shorter fuel pump drive shaft/pin..
LEE
you're making me dizzy,Lee.
of course you guys are right...reg. and gauge is the best fix.
just for interest sake i have 6 gaskets under the pump and am getting about 5 psi with the gauge plugged into the fuel line (not tee'd in) so ~4 thin
paper gaskets got me a couple of psi drop
in pressure
anyone like to recommend brand/type of regulators, fuel pumps?
thanks, phil.
not the one that is the steel body with the push down and turn dial. i went through 3 on my bug before saying bugger it.
oh...shame about that..i think have one of those the shed. thanks.
and sides....yeah, time to release some 40 dells from there cardboard wrapper
thats what i put on mine and why i fitted the reg to limit it to 3.5 psi. unfortunately they didnt last more than a month each.
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Holley or Mallory would be my pick.... you want the "deadhead" style which doesn't use a return line.
Can usually pick either up on ebay for around the $60-$80 mark without too much hassle, and a decent 1 1/2" gauge to put into it prolly $40'ish.
Also make sure you get carb versions... the range you want is 0-15 psi.
thanks sides