I finally got round to progressing my LPG install, and got to the testing stage a couple of days ago. Lack of funds ment I took the cheap option and bought a 2nd Bigas Sgis N hand kit. I would agree with comments in the other thread about problems, eg damaged and broken wires and damaged fittings, however the basic guts were OK, plus it had a unique advantage. It came from a 2.2 Omega, and included the inlet manifold complete with fitted nozzles, pipes the right size etc so saved a load of hastle, just clean, do the breathers and fit.
I had trouble getting the filler to seal to the feed pipe, it didn't "feel right". This was shown up when I went to put in gas for the first time. I plugged in the gas nozzle and was greated with a stream of gas from the filler/feed pipe join. This was traced down to a slightly damaged filler, a dent on one side of the mating face was preventing a gas tight seal. However on the way home, I pressed the changeover button and the car ran on gas !. Only for half a mile, there must have been enough vapour in the tank, but a great feeling after all that lying on your back under the car drilling holes etc. A replacement filler cured this, I stuck in a couple of litres and sucessfully leak tested everything.
There is a missfire on one plug at low revs, plus no pulling off torque, but it hasn't been set up at all so not surprising. Once at 50ish it runs OK.
Instantaneous fuel consumption looks very close to petrol, so nearly there.
I took it for a COP 11 check. The guy failed it on a couple of points; it seems they have changed the pipe/exhaust spacing again to 150mm, plus I fed mine under the O/S suspension arm mount as there seemed to be more space than next to the petrol pipes which are right next to an exhaust box. He said the suspension arm was only 3mm away from it; I'm sure it is better than that, but if I want the paperwork........
He also charged £75+vat for about 30mins work. Ouch
Oh yes, many thanks to Lazy Docker for answering my queries
Ken