LPG System

[bigman1207]

There are a number of LPG systems on he market....of which I know nothing!

So once again to any LPG gurus out there... is the Witte Van Moort system any good, hooked up to a donut tank if that makes a difference.

Cheers

BM

[miker33]

Must admit been LPG for years and not really heard about those conversions before.

Choice really depends on budget and how locally you can get installed/serviced/repaired as you don't want a system which you can't get looked at without travelling 100's of miles.

After having a few different types, Emmegas, Romano, Stag and Prins I can say hands down that the Prins has been the best in both reliability and matching the characteristics of the original petrol system but these are also the most expensive. The Stag setup came a close 2nd and I actually managed slightly better overall fuel economy on the Stag as it is more custom programmable than the Prins and much cheaper but expect the odd issue with injectors and reducers etc (unless you buy very expensive reducers\injectors but then you may have well had a Prins anyway lol) which can make it expensive in the long run if you can't fix it yourself.

Currently running 2x Prins VSI2 setups on a BMW 7 and Honda CRV and haven't had to touch them at all since the initial 1000 mile checkup\calibration.

Cheers,
Mike

[berendd]

Witte van Moort is an LPG tank producer not a system producer, maybe they market a certain system under their name but is certainly is not a "Witte van Moort system". The tanks they produce are good quality but with LPG the problem rarely lies in the tanks.

For what car are you looking into an LPG system, I guess as LPG is viable when used regularly it would be an injection system?

There's several stages of development available on the market, all have some drawback but generally said look for a reputable installer or dig into it yourself and install your setup with great care. As an LPG system digs into all layers of engine management, sensors etc, a badly done install can cause a lot of problems regardless of the brand chosen.

My Mercedes E420 runs a Vogels VGI controller www.lpgwebshop.com/lpg-gascomputers-ecu/410-gascomputer-ecu-vogels-vgi-5-8-cil-obd-aluminum-versie-aeb2568d.html and
AEB injectors (2 rails) www.lpgwebshop.com/home/212-lpg-injectorrail-aeb-inj-r4s-aeb-i-plus-vgi-4-x-injector.html
combined with an OMVL evaporator www.lpgwebshop.com/home/213-lpg-verdamper-omvl-dream-xxi-std-6mm.html and a standing toroidal tank in place of the spare wheel (which sits in the side of the boot in a W210 wagon).

have driven 100.000km with this setup since it was installed 2 years ago and haven't had any major technical issues. Do have a problem with the car sometimes stalling on LPG but it appears to be in the petrol system.

The Vogels controller is completely open and can be modified with maps etc. It also has an option to connect a lambda sensor to the ecu directly which i am planning to do.

[ChasR]

Prins is meant to be the best.

I've used Zavoli before and they have been fine.

What makes the biggest difference in any system is the installation. I once had a LandiRenzo kit which everyone raved about. Due to poor installation and maintenance it was a very iffy LPG system. When working it was great and I did get it to work well.

If you can get a side fill round tank (similar to the doughnut but they don't have a hole in the middle) they are great. They fill up reasonably well and due to the middle space being occupied they have a reasonable capacity.

[bigman1207]

Not sure what system I have will pop bonnet and have a look to see if I can identify it

Cheers

[bigman1207]

It's a Tartarini system

[bigman1207]

Tick over hunts 500 to 800 rpm very very slight hesitation when pulling off on gas

Plug change pending and will be cleaning maf sensor and throttle body out shortly

Cheers

[dodgerover]

Idle control valve gummed up?

[miker33]

Assuming it doesn't do this on petrol too I had a similar problem on my original Romano setup quite a long while ago, idle was lumpy and would drop off to around 500rpm then the car would over compensate on the approaching stall condition causing it to jump up to near 1k then steadily drop off again until the cycle repeated or it finally stabilized.

That issue was with the injectors not working very well at a short opening duration causing mixture issues at idle, in my case the injectors were going bad (not uncommon on the early Romano sequential systems) but this can also be caused by incorrect pressure from the reducer (more pressure than designed will cause the injectors to struggle to open\delay the opening time).

[heathrobinson]

Has anyone looked at BLOS carbs? They seem more useful for a retro situation. In fact I bought one a while ago, but haven't owned anything small enough for just one carb pretty much since I bought it... Clever eh?

[ChasR]

Mar 8, 2017 16:37:07 GMT heathrobinson said:

Has anyone looked at BLOS carbs? They seem more useful for a retro situation. In fact I bought one a while ago, but haven't owned anything small enough for just one carb pretty much since I bought it... Clever eh?

Onne has a BLOSS.

From what I can tell they are an effective system compared to a straight up mixer system. But Mixer systems can be fine on carb applications with the right hardware.

That reminds me ; I better sell some of my LPG kits!

[Onne]

I did indeed have a BLOS setup on my K-Jet, but have now been running on petrol again for two years. I just couldn't get the reliability on LPG on the K-Jet setup.

and running on petrol smells so much nicer

[dodgerover]

I have a BLOS fitted on a 2 litre pinto

Oh and I finally got a response about boost and yes they will take it you just need to set up like you would an old style turbo lpg system referencing the vapouriser to manifold pressure rather than atmospheric

I think the horse power limit they state they are suitable for is a little on the conservative side.

[heathrobinson]

How does it compare to mixers?

[dodgerover]

Much much better than the more restrictive mixer choices, really wants setting up on a rolling road IMO for absolute best results. Fuel economy is good as is response - doesn't seem to make it run over rich on petrol either if I ever run out and have to use it.
I'm running open loop but Can be set up to work with a Leo as well, I've seen one used as an owners choice budget option on a car that should really have had an injection system and it worked fine.