The V8 Owners Forum -

Im all up and running with my lathe in my garage, well all except the suds pump, I did have a pump sorted but it now turns out its unsuitable as it needs a head pressure before it will pump, and im not really wanting to chop the lathe about to fit it,
So I have been thinking, I know a worrying situation, whats to stop me using a normal external 12v FI pump [cos I have one] and dropping it in the tank, obviously with suitable filtering attached, the voltage concerned should not give any electrical problem, the suds mix will give the lubrication and the pump will certainly have the volume I need,
the major + side as I see it, I have not got 240v electrics anywhere near the suds as I can mount a cheap 12 transformer in the control box out of the way.

Ian

What sort of volume do you want as most FI pumps move a hell of a volume like 90 - 120gph = about 6 - 9 litres per minute

I'd probably suggest a low pressure in line facit pump instead probably the non gerrator type and then regulate the flow with a tap - after all this is effectively what the carb float is doing.

Ian

7-9 LPM or 2 GPM probably is not that excessive its will be choked by a tap,
Dont see any probs with using the pump in a water/oil mix??

With a diffrence in viscosity between petrol and water, and even greater when mixed with soluble oil, you probably aren't going to see that much flow, just remember too point it away from you can't see why there would be a problem myself

ian.stewart wrote: I can mount a cheap 12 transformer in the control box out of the way.

12v A.C will be wonderful on a 12v DC pump

.

will a scalextric trans work??

ian.stewart wrote:will a scalextric trans work??

Not sure if the output will drive the pump., too many amps required for the pump I would think.

.

Just been looking at Caravan submersable water pumps on fleabay, seem to be quite cheap too.
http://cgi.ebay.co.uk/12v-Submersible-W ... 7C294%3A50

Was going to suggest looking at caravan stuff.

There are all sorts of water pumps available, and not dear. There is a company over here that makes them, Whale.


Or another, prob same stuff, check out marine type pumps for boats ?

But the caravan stuff would be easiest.

I use a smallish (and cheap) pond pump with my stuff. It comfortably supplies the 12 nozzle ring feed I use when machining Ti. Depending on what I'm machining, the suds tank may be up to 4 feet below the nozzle

Put the caravan pump to use, works a treat, managed to fire a jet of suds 4mts up to the apex of my garage, free shower,
the only problem, I can see with it is its uses permanent magnets and allready has a fuzzy jacket of steel and cast iron swarf, only time will tell,
Anyway, found a real suds pump in the skip at work with a blown motor, so thats sitting in the garage as a spare once I can sus how to attach a 12v motor, its got an integeral motor on top, so I may just fit a stud thru the top of the casing and cobble up a simple coupling to take a wiper motor, and slave drive the 440v motor.

ripping a window wiper pump off a spare car ought to do the job. they're already set up for sudsy water anyway

window wiper pumps flow very very little fluid and are designed for short duration only.

The caravan pump sems to be working fine

The pump from a parts washer should also do the job well. If the machine is 3 phase running 380/440 then run it off one phase to give 220V.