I hadn't intended to, as the stock mechanical pump is more than capable of keeping a pair of Dells fed. But...the draining down is becoming a bit tiresome. The Dells - mine were off an Alfa 33, I believe - would've had an electric pump originally. If @77 Westy reckons a Carter is reliable, I'll fit one. The fancy relay solves the "shut the pump off when the engine stops" issue nicely - like it I'll save it up to do with the other jobs I've got to do under the van. I can't bloody bear to jack it up these days - hate it. Still, needs doing, along with other stuff.
I still think the cut off solenoid is the only way to prevent siphoning. The pump can't do that as it's a centrifugal type not a positive displacement pump.
Rotary pumps are generally reliable and I’ve had no problems with mine, any failures you read about are usually due to operator numptyness. But there’re a couple of things they don’t like; being dry and dirty fuel. And they need flow to keep cool. They don’t suck very well but the tank is high up in a Bay and with a pump mounted on the chassis rail being dry isn’t be a problem, unless you run out of fuel. I wouldn’t fit a fuel cut-off valve because sooner or later the pump will be run with the valve closed and I wouldn’t connect it direct to an ignition feed because the pump only needs to run when the engine is running so there is flow through the pump. There must be a good quality filter upstream of the pump but if it does get jammed up with crud reversing the direction for a few seconds would probably clear it. I use a metal filter and have changed it three times in 9 years.
I don’t think syphoning is an issue, the more likely problem is fuel leaking into the engine if the float valves don’t work.
Don't need an expensive fuel shut off valve, I went back to mechanical pump which is fine for the single solex 34 pict 3. Siphoning while parked up I prevented with a manual fuel tap on off switch just inside the engine bay after the metal pipe. Before start up I switch on the tap and when parking up I switch it off and let the engine run for a minute to lower the carb bowl fuel level. Fuel filter under the tank outlet. This setup is simplistic and it works for me. We installed a Facit 1.5 to 4 psi pump with relay on my son's T25 some time ago. It has been very reliable and the main thing is to choose a low pressure pump so the solex carbs are not overwhelmed. So far so good.
Is it syphoning or flooding you’re preventing with a manual fuel tap? If it’s syphoning why lower the fuel level in the float chamber when you switch off?
The main purpose of fitting a cutoff valve is to be able to shut off the fuel supply if you have a fire in the engine room. With no valve in place, you’ll potentially have 50 litres of fuel gravity-feeding into the engine compartment, keeping the blaze going nicely...
Got a Carter on the Bug, it's been fine feeding the 48's without a regulator. The bus has Dells, it had a Facet cube pump on when I bought the bus. No regulator was fitted I have since fitted a regulator but the left hand carb has developed a nasty habit of sticking and flooding, I reckon either the float is sticking, or more likely, the needle valve. Moral is, I reckon the cubes pumps put out too much pressure and need the regulator.
This is all very well, serves its purpose, but if its dark and you are in a hurry then its too easy to forget manual valves , and if you do have a fire then that manual valve is suddenly out of bounds.
I think our Facet pump doesn't pass anything through if it's not running... unless I was just lucky with where it was in the pump cycle last time I disconnected a pipe to change the filter as I didn't need the plug I had to hand, I'll test that some more next service Sent from my SM-G930F using Tapatalk
Just me and my van and I don't drive after dark so a nice simple fuel switch setup is fine for me and it works with no siphoning. I am not against fuel cut off safety devices, but do modern cars have them?
Most cars don’t have the fuel tank sitting up high, which is potentially a prob with Bays. Very unlikely you’ll have an engine fire if your hoses are in good shape, but if the hoses burn through, the tank will empty into the engine room.
Low pressure facet!.. bit noisy only but it's conforting to hear.. only when engine not running obviously that drowns most other worryng noises anyway. http://www.mattlewisracing.co.uk/product.php/191/0/facet_fuel_pump___matt_lewis_racin Sent from my SM-G930F using Tapatalk
Exactly what I use on the buggy with no reg. I wait till the note changes when the pump has filled the carbs then I know to start it up.
Update on my fuel question. I tested the pressure output today and the pump is delivering just over 5psi. I think I'm going to buy one off these pressure regulato to regulate this towards the 2.5psi I understand the Weber ict34s need. https://bluefuelco.co.uk/product/va...VptDXzXogzi7jm6zr48IcPPY83jY-2o4aAlozEALw_wcB
That looks suspiciously like the EMPI one, which I believe just restricts flow (and leaks). Go for a Malpassi Petrol King.
