www.dodo-upgrades.nl

I would like to contribute some info about running LPG, this seemed the place to do it. Over the coming weeks I will post photos, info and tips on strategy and possibilities. Wafch this space!

You welcome to transfer your knowledge about the LPG, also to post photos and what is need for best presentation of your articles.

my ecu tuner suggested me also cz he says " honda engines are better to run with excelent quality of unleaded , so since u cant afford every time for good fuel , lpf is a good solution and with obd1 the extra piggy bank runs perfect , u always a full tank of power unleaded and in city u run lpg , also great torque in low to mid "

Your tuner is right on every point. The real bonus in the UK is much lower, less than 50%, fuel prices. At the weekend I will post some info on LPG installs.

Right guys - pay attention, I'm going to attempt to give you some quite detailed info on installing/running LPG. Forgive me if I appear patronising or over simplistic I will assume good tech knowhow and zero LPG knowledge. Don't hesitate to post questions, having 5 sons I'm familiar with satisfying inquisitive minds! .
All automotive installs can be divided in two: Front end and rear end. Rear ends are all broadly similar; tank and valvework, filler and pipework and the pipe connecting to the front end.
I'll concentrate on engine strategies first.

2 ways of getting gas (being in the biz it's always gas - not LPG/propane, confusing if you buy gasoline) into an engine, either multipoint injection or by a mixer into the throttle body. The simplest is a mixer fed by a vapouriser, some photos of a typical mixer.



The mixer is a simple venturi fed with gas at just above atmospheric pressure much like an early carb. As air flows through a venturi (restriction) it's speed increases and the pressure drops. This will draw gas into the throttle body on demand, simple, but like a carb it is not a precise instrument.

You can use a mixer on most normally aspirated engines, it is difficult and pointless using a mixer with forced induction. Two strategies with a mixer either open or closed loop. Open loop is reliant solely upon engine demand, a cheap and cheerful solution - eBay will provide everything you need for £100/£120. Closed loop employs a stepper motor valve between the vapouriser and mixer controlled by a simple ECU which reads TPS, RPM and lambda O2. £120 new but you will need a computer lead, software and laptop to set it up. By the time you get there it is worth considering an injection system, between £250 and whatever they think that they can get away with. I'll cover injection in a later post.

nice info here!

Ah, now I understand why my friend with a Saab 9000 turbo has LPi. It simply would not work with a vaporiser, clear.

Great, looking forward to the rest