Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: SteveD on 09 July 2008, 20:23:04

Title: How to adjust LPG vapouriser pressure?
Post by: SteveD on 09 July 2008, 20:23:04: I've got one of Jeremy's kits and have seen a few people mention increasing the vapouriser pressure. How do you do this?
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Kevin Wood on 10 July 2008, 00:02:20: On the front of the Vapouriser there's a large allen key plug right in the centre. May have a "voltran" sticker on it.

Take the sticker off and wind in the plug a couple of turns with a (10mm?) allen key.

Kevin
Title: Re: How to adjust LPG vapouriser pressure?
Post by: SteveD on 10 July 2008, 08:42:21: Thanks Kevin.

I'm suffering from "injectors always open" at WOT high revs but only just so I reckon upping the pressure will sort it.
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Kevin Wood on 10 July 2008, 09:45:11: OK. :y

Out of interest, what size did you drill the injector nozzles out to?

Kevin
Title: Re: How to adjust LPG vapouriser pressure?
Post by: SteveD on 10 July 2008, 11:09:25: I drilled them to 3.0mm.

I think they would go to 3.1 but I would be worried about snapping the bit where the hose goes on if I went to 3.2.

Well impressed so far though. I'm getting about 17MPG running to work and back and have halved my fuel bill already! The only difference when on gas is that the engine runs smoother.
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Kevin Wood on 10 July 2008, 11:36:54: OK. I drilled mine to about 2.8 IIRC. I'll probably have to increase that I guess. I would have thought there would not be much to gain by drilling them bigger than 3mm in any case. The injector nozzles themselves would start to become the weakest link I reckon.

Kevin
Title: Re: How to adjust LPG vapouriser pressure?
Post by: SteveD on 10 July 2008, 11:52:49: The deviation on mine as it is set up now ranges from +4% to -1% so I don't think it's far out at 3mm. I am going to hook the pikey box up next week & drag it up & down the M55 to see if any more tuning is needed before the Corwnall trip!
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Lazydocker on 10 July 2008, 16:18:12: I reckon from the experiences of other people that 3mm is probably the best bet... I'm hoping that's what you're going to do mine to for me please Kevin? :y :y :y
Title: Re: How to adjust LPG vapouriser pressure?
Post by: The Cambelt Kid on 16 July 2008, 23:01:16: I think mine are on 2.85 and it works fine. 3mm is a bit OTT i think.

Ta
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Kevin Wood on 16 July 2008, 23:07:58: Quote
I think mine are on 2.85 and it works fine. 3mm is a bit OTT i think.

Ta

Does yours have the 1 ohm (yellow) gas injectors or the 3 ohm (red) ones? I have a feeling the red ones are looking like they flow a little less gas (and need to be drilled wider).

Kevin
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Jay w on 16 July 2008, 23:16:46: mines at 3mm now and still get the injector error message at WOT...

ended up setting the unit up to kick back to petrol at 6000 rpm
Title: Re: How to adjust LPG vapouriser pressure?
Post by: The Cambelt Kid on 16 July 2008, 23:23:51: Dunno what they are. They were (or should) be the correct rating for the power output of the 2.6. I recall having to specify exactly which model and bhp my car was whn i bougt the kit.

Here's a pic anyway...

(http://s164763218.websitehome.co.uk/omega/injector_mount1.JPG)
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Kevin Wood on 16 July 2008, 23:29:33: Ahh, blue ones. :-/ Had a feeling you had one of Jeremy's kits but not so?

Quote
mines at 3mm now and still get the injector error message at WOT...

Be interesting to see what my 3.2 makes of this kit... There's nothing left to give at 3 mm (nozzles are 3mm internal diameter). I wonder if we are hitting the limits of the multivalve?

Kevin
Title: Re: How to adjust LPG vapouriser pressure?
Post by: JueV6 on 17 July 2008, 00:03:13: I have blue ones on mine too. and mines an OLD system ::)
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Lazydocker on 17 July 2008, 10:41:36: I thought you went with a 4 hole tank Kevin? If so I believe the "multivalve" should be good for in excess of 400bhp engines... I know of people on the LPG forum who have successfully converted high performance cars with 4 hole tanks!
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Kevin Wood on 17 July 2008, 10:50:29: Quote
I thought you went with a 4 hole tank Kevin? If so I believe the "multivalve" should be good for in excess of 400bhp engines... I know of people on the LPG forum who have successfully converted high performance cars with 4 hole tanks!

Yes, I did go for the 4 hole, so that hopefully shouldn't be an issue with mine.

BTW: did your manifold last night. :y

Kevin
Title: Re: How to adjust LPG vapouriser pressure?
Post by: Lazydocker on 17 July 2008, 13:32:08: Thanks... I'll give you a call later about meeting up tomorrow :y
Title: Re: How to adjust LPG vapouriser pressure?
Post by: SteveD on 20 July 2008, 10:39:13: For info..

3.0 facelift

I upped the pressure on mine to 1 bar, injectors at 3mm & 4 hole tank.

No errors get thrown at all now & it will accelerate all the way at full throttle. I've just towed my pikey box to Cornwall without it ever switching back to petrol. Only used about £65 worth of gas!
Title: Re: How to adjust LPG vapouriser pressure?
Post by: The Cambelt Kid on 20 July 2008, 10:46:20: Quote
For info..

3.0 facelift

I upped the pressure on mine to 1 bar, injectors at 3mm & 4 hole tank.

No errors get thrown at all now & it will accelerate all the way at full throttle. I've just towed my pikey box to Cornwall without it ever switching back to petrol. Only used about £65 worth of gas!

Excellent... i have to adjust the pressure on mine too. Didn't know i could until reading this thread. :y