Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[tunnie]

Hi i am also considering LPG for my 2.2 cdx 53 plate can anyone tell me if the MPG readout still works when your on LPG. [smiley=huh.gif]

YES it does .. but the readout is as if you were still using petrol .... 

The LPG ECU does NOT replace the petrol ECU, it works "with" it ... and just switches off the injectors, so all the MID features still "thinks" you are burning petrol ..

How accurate have you found it?

[edwarda]

MMM!!! interesting thanks for that,the quote ive had to do the job is £1275 + vat not sure what system it is but he said he fits a drip feed bottle to lubricate the valves is this right. [smiley=undecided.gif]

[tunnie]

MMM!!! interesting thanks for that,the quote ive had to do the job is £1275 + vat not sure what system it is but he said he fits a drip feed bottle to lubricate the valves is this right. [smiley=undecided.gif]

Valve lubrication is new one on me  :-/

£1.2k is tad cheap for 'professional' conversion.

Ask them easy question: 'Do you drill the manifolds in place, or remove them?' 

[Entwood]

MMM!!! interesting thanks for that,the quote ive had to do the job is £1275 + vat not sure what system it is but he said he fits a drip feed bottle to lubricate the valves is this right. [smiley=undecided.gif]

Valve protection comes under several names ... it was fitted to mine as part of the "deal" but all my research says it is NOT required for the Vauxhall engines of this era .. certainly the V6 version anyway....   As I've got it on I use it at a very low level on the grounds it can't do any harm.

There are quite a few threads dotted about, some quite old, on LPG conversion .. well worth a bit of research IMHO

I paid a lot for mine, it is about the only non-diy that the guys on here "who know" reckon is even half-decent.

I spent a long time researching the conversion ... and if the place could/would not give me names/telephone numbers of previously converted omega's I was not interested. I found the place that did mine, near Kevin Woods as it happens, they had done V6 Omega conversions and were happy to give me contact details once they had checked with the contact ( a little touch I thought good). I spoke to those folks and the answers made up my mind.

I have absolutely no regrets in either having it done , or the way I chose  (non-DIY), although if I were in that position now I'd probably be buying certain members large amounts of beer and asking them to help me do it..

[Lazydocker]

MMM!!! interesting thanks for that,the quote ive had to do the job is £1275 + vat not sure what system it is but he said he fits a drip feed bottle to lubricate the valves is this right. [smiley=undecided.gif]

Valve protection comes under several names ... it was fitted to mine as part of the "deal" but all my research says it is NOT required for the Vauxhall engines of this era .. certainly the V6 version anyway....   As I've got it on I use it at a very low level on the grounds it can't do any harm.

There are quite a few threads dotted about, some quite old, on LPG conversion .. well worth a bit of research IMHO

I paid a lot for mine, it is about the only non-diy that the guys on here "who know" reckon is even half-decent.

I spent a long time researching the conversion ... and if the place could/would not give me names/telephone numbers of previously converted omega's I was not interested. I found the place that did mine, near Kevin Woods as it happens, they had done V6 Omega conversions and were happy to give me contact details once they had checked with the contact ( a little touch I thought good). I spoke to those folks and the answers made up my mind.

I have absolutely no regrets in either having it done , or the way I chose  (non-DIY), although if I were in that position now I'd probably be buying certain members large amounts of beer and asking them to help me do it..

I'll re-phrase that Entwood... It's the only "Professional" LPG conversion I've seen which passes my standards

[Entwood]

Thanks for that LD ..

As for valve lubrication ... more info can be found here ..

http://www.flashlube.com

and there is quite a bit of info also, on the whole LPG thing

http://my90.co.uk/lpg/index.php?sid=218c3710766bb28ae82bbbee2990fe67

[Kevin Wood]

How accurate have you found it?

Without burning any petrol to use as a reference it's difficult to say. I find mine is more pessimistic on gas than petrol. It used to average around 27 on petrol and now it's normally around 24.

This may be because the LPG system is not mapped that accurately (There will always be speed/load combinations where the ECU has to chuck in a load of fuel trim) or because the engine output is slightly reduced on LPG and therefore is running at a higher apparent load as a result.

I must admit I don't really use it now I'm on LPG, partly because it's pretty meaningless and partly because LPG's so cheap I don't care as much.

Any early indications of LPG consumption from the 2.2?

Kevin

[TheBoy]

How accurate have you found it?

Without burning any petrol to use as a reference it's difficult to say. I find mine is more pessimistic on gas than petrol. It used to average around 27 on petrol and now it's normally around 24.

This may be because the LPG system is not mapped that accurately (There will always be speed/load combinations where the ECU has to chuck in a load of fuel trim) or because the engine output is slightly reduced on LPG and therefore is running at a higher apparent load as a result.

I must admit I don't really use it now I'm on LPG, partly because it's pretty meaningless and partly because LPG's so cheap I don't care as much.

Any early indications of LPG consumption from the 2.2?

Kevin

Wouldn't that be about right, given people have said mpg is around 10% lower on gas?

[Entwood]

Mine gives "correct" mpg as if I was running on petrol, and it checks out with my "assumed" petrol consumptions for my spreadsheet.

Yes, LPG consumption in mpg terms is about 10% worse .. due simply to the fact it weighs less !!!, however the TRUE specific fuel consumption in terms of pence per mile is still around 40% better.

Over just over 20,000 miles the cost per mile in petrol has averaged 23.26 (estimated but confirmed by MID) against 14.18 pence per mile for LPG .. a saving of 9.08 pence /mile or 39.03%

And that includes a LOT of towing miles when the consumption of both is much higher than yours will be..

[tunnie]

How accurate have you found it?

Without burning any petrol to use as a reference it's difficult to say. I find mine is more pessimistic on gas than petrol. It used to average around 27 on petrol and now it's normally around 24.

This may be because the LPG system is not mapped that accurately (There will always be speed/load combinations where the ECU has to chuck in a load of fuel trim) or because the engine output is slightly reduced on LPG and therefore is running at a higher apparent load as a result.

I must admit I don't really use it now I'm on LPG, partly because it's pretty meaningless and partly because LPG's so cheap I don't care as much.

Any early indications of LPG consumption from the 2.2?

Kevin

Not yet, only burned one tanks worth so far, and that was from bone dry tank, also just rotated it, so not accurate yet. Got to go to work on Friday!  The cheek of it! 

Should be a good test to see what i am getting.