make sure the fuel pump is under 4psi or put a pressure regulator in the line or you will have issues.
if using a "Facet" style fuel pump you need to put it down as low as you can as they push really well but do not create much suction.
cheers
make sure the fuel pump is under 4psi or put a pressure regulator in the line or you will have issues.
if using a "Facet" style fuel pump you need to put it down as low as you can as they push really well but do not create much suction.
cheers
1998 Discovery 300TDi Manual SE7
1996 Discovery 300TDi Auto
2012 SZ Territory TX 2.7TDCi
"Make the lie big, make it simple, keep saying it, and eventually they will believe it." -- a warning from Adolf Hitler
"If you don't have a sense of humour, you probably don't have any sense at all!" -- a wise observation by someone else
'If everyone colludes in believing that war is the norm, nobody will recognize the imperative of peace." -- Anne Deveson
“What you leave behind is not what is engraved in stone monuments, but what is woven into the lives of others.” - Pericles
"The happiness of your life depends upon the quality of your thoughts." Marcus Aurelius
Shane, I am finding that if I don't start the landy for a couple of weeks, I get an airlock between the pump and the filter, and no amount of cranking will give me enough fuel to start. I have a weber carb, so maybe better with other carbs. I thought I would try a cheapie pump first to see if it solves the problem, so I bought a New Electric Fuel Pump For Motorcycle Low Pressure 12V Carburetor FP-02 ATV | eBay but I haven't installed it yet.
Cheers,
John
Yes John, with a Tee piece each side of the Mech pump. I know when the SU is working because it reverberates through the chassis despite the rubber isolators but as it is used only briefly & when stationary, after the engine has started it is of no real consequence.
It is a bit tight-ish down there but is quite do-able without throwing the SU across the shed & with minimal swear words but make sure you use good quality fuel injection hose & clamps.
Cool !! I will definitely go the dual pump approach.
So, did you consider putting them in series, so tank->mech pump->electric pump-> filter-> carb ?
I guess that means you can't turn off the elec pump when engine is running :-)
Just thinking out loud ....
Cheers
John
No, I didn't even consider that as I thought there could be a problem with either of the mech pump check valves (there are two in there) operating against the flow. In my case using it as an ad hoc thing it wouldn't really happen, but down the track something could.
Interesting thread - I have been running Series 2/2as on and off for almost sixty years (current one for nearly thirty), and have never had an issue with the mechanical pump that did not have an easily found cause and was easily fixed. Most commonly a small air leak on the suction side of the pump, often the gasket on the water trap, but I have had a hair (looked like) under one of the valves, and on another occasion a broken valve spring.
In the case of a vehicle left standing for long periods, about a minute with the hand primer is usually enough.
In the unlikely event of fitting an electric pump, I would fit it in line with the mechanical pump and with an on/off switch, to use it only for priming the mechanical pump.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
the other big advantage i found with the electric pump was no more fuel vaporising in the fuel lines...
but thats more a worry with Holden powered units
1998 Discovery 300TDi Manual SE7
1996 Discovery 300TDi Auto
2012 SZ Territory TX 2.7TDCi
"Make the lie big, make it simple, keep saying it, and eventually they will believe it." -- a warning from Adolf Hitler
"If you don't have a sense of humour, you probably don't have any sense at all!" -- a wise observation by someone else
'If everyone colludes in believing that war is the norm, nobody will recognize the imperative of peace." -- Anne Deveson
“What you leave behind is not what is engraved in stone monuments, but what is woven into the lives of others.” - Pericles
"The happiness of your life depends upon the quality of your thoughts." Marcus Aurelius
That is why I bought the SU years ago to fit to the engine bay of a Hi-Ace with a high engine cowl I found fuel vaporised & took a while to start.
Wasn't high on the to do list at the time & never was fitted to the Hi-Ace but sat on the shelf until it went into the S2 & in the meantime was temporarily fitted into a Morris Minor hi-lite to keep it running for a friend until the other was repaired.
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