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[JamesV6CDX]

That makes sense to me, I think thats how I would do it myself, but I would also want some sort of tank level/capacity level too, therefore i would do it like they say, so my car could have two guages/l.e.d levels for reference.
Having said that, if you only had one guage, and wired in parrallel, how would you know which tank was empty?? so perhaps they are right.

To be honest, I never use fuel level gauges with LPG. They're not the most accurate thing in the world - I tend to base it on mileage

As long as the engine can "get the gas" and it's safe, then I'm happy 

But are the insurance/LPGA etc

Course they are - where does COP state the need for a fuel gauge? 

I was referring to the valve arrangements etc to join the 2...

Gotcha...

I would need to double check, although I am sure the only requirement in the COP, is for non-return T's to be used 

[Sixstring]

GRANTED,   but I personally would be hard pressed to "remember" when you fuelled tank A, or tank B, or how many miles did you do yesterday, and on which tank, and when does it need filling again, seeing as you can only fill one tank at a time at a garage, better you have SOME idea whats in what tank?
Can't actually find a COP requirement for a guage, but surely SOME idea is better than NO idea?

[JamesV6CDX]

GRANTED,   but I personally would be hard pressed to "remember" when you fuelled tank A, or tank B, or how many miles did you do yesterday, and on which tank, and when does it need filling again, seeing as you can only fill one tank at a time at a garage, better you have SOME idea whats in what tank?
Can't actually find a COP requirement for a guage, but surely SOME idea is better than NO idea?

You wouldn't fill them seperately - they would be both joined to the same filler - it would basically be treated as one tank

[Kevin Wood]

That makes sense to me, I think thats how I would do it myself, but I would also want some sort of tank level/capacity level too, therefore i would do it like they say, so my car could have two guages/l.e.d levels for reference.
Having said that, if you only had one guage, and wired in parrallel, how would you know which tank was empty?? so perhaps they are right.

To be honest, I never use fuel level gauges with LPG. They're not the most accurate thing in the world - I tend to base it on mileage

As long as the engine can "get the gas" and it's safe, then I'm happy 

If you have twin tanks, the lower of the two will empty last. Presumably this will be the donut tank in the boot floor so worst case, if you hook up this level gauge you will get some warning when running low. It will sit at "max" while the higher tank empties, then start to descend as the lower tank empties.

You might be able to wire the two sensors in series to get a better indication, but this depends on them being exactly the same type, and the ECU adjustment having enough range to cope with a sensor of double the resistance.

You will need non-return tees where the feeds from the tanks join and, IIRC, you need to protect the remaining length of fuel line with some sort of relief valve as it will not be able to vent back into one of the tanks if it overpressurises. I might be wrong on that, though. :-/

Kevin

[Sixstring]

Reckon you are correct, Kevin. Also, you may have to fit a "blow-off" valve of some kind for overpressure??

[Kevin Wood]

Reckon you are correct, Kevin. Also, you may have to fit a "blow-off" valve of some kind for overpressure??

I believe it depends on the volume of liquid that can be contained. Above a certain limit a blow-off valve will be required.

EDIT: I will have a look how the winches at the gliding club have been plumbed if I remember. They have 2x100 litre tanks and the top one very definitely empties first (and fast, on an 8.2 litre lump with a mixer system).

Kevin

[Lazydocker]

I had a three tank set up on the Rangie... Twin Sill Tanks and an 80L Cylinder in the boot.

Only requirement in the COP is that both the fill and empty lines are joined (If joined) with non-return Tees

As for filling/emptying order... IME it varies depending on the day of the week and/or what mood it's in But it works

Just bear in mind though that most LPG pumps will be set to cut out at either £100/100L (normally the latter) and you'll have to start a fresh fill (and transaction) to fill the rest. This was a right royal PITA unless the staff a) Had their heads screwed on or b) Knew you

Oh... And it takes even longer

[Lazydocker]

Reckon you are correct, Kevin. Also, you may have to fit a "blow-off" valve of some kind for overpressure??

Think the valves fitted to the tanks are sufficient to comply with the COP

[JamesV6CDX]

Tank mounted 

Ok, this donut tank is mahhosive, I had to do a couple of very subtle mods to get it in the spare wheel well ... but it is in.

Have drilled the holes for the securing bolts, and for the gas tight tube, all aligned lovely.

There is, a very small amount of movement... simply because the entire wheel well moves a tad, but it is absolutely safe and secure.

Doesn't sound like a lot, but with rust protecting, and making a nice tidy job, it takes a little time. Spent 3 hours on it tonight - 6 till 9pm.

Tomorrow I'll play with things like filler mounting to the towbar, and start looking at the pipe runs.

If I can get the rear end kit mounted in the evenings this week, then, I can concentrate purely on the front end, over the bank hol weekend 

[sassanach]

this 8.2 litre lump would,nt happen to be a cadillac motor would it?

[JamesV6CDX]

this 8.2 litre lump would,nt happen to be a cadillac motor would it?

Mr Sassanach!

Good to see you around - hope all is well in your neck of the woods? 

[Kevin Wood]

this 8.2 litre lump would,nt happen to be a cadillac motor would it?

This is the beastie:



They are certainly GM. I believe they are marine spec 502 big blocks.

Kevin

[JamesV6CDX]

Filler now mounted.

It's a box type filler, mounted to the towbar.

It's not your usual towbar though, so I had to fabricate a bracket from a strip of steel.

Looks very tidy... and blends with the towbar setup... you would have to really know your stuff to know it's LPG

Time to think about pipe runs, tomorrow.... 

[Kevin Wood]

Oh, and that big black rubber pipe in the foreground passing over the rocker cover and disappearing off to the left of the engine is the vapour feed from vapouriser to mixer. As thick as some engines' heater hoses.

Kevin

[JamesV6CDX]

Ah, Crap 

Multivalve snags, tonight.

The filler aspect of the valve is fine - but being a toriodal tank the outlet is quite close to the inner wall of the tank, and requires an elbow. Well I screwed the elbow in - but with the poly adaptor, it needed to move just a couple of degrees clockwise.

I nipped up the elbow - honestly quite gently - and the barsteward thing has broken off in the multivalve.

I just hope it comes out with an easy-out, otherwise, it's new multivalve time 

Bah!