Omega Owners Forum
Chat Area => General Discussion Area => Topic started by: JamesV6CDX on 27 June 2008, 21:39:17
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I've been playing with the LPG install tonight trying to fine tune it. This is the first decent session I've had with the laptop.
First observation was that the multipliers were unusually high following autocalibration, and every time I pushed the engine past 4k revs it would flag a fault that the injectors were fully open.
I gave the car some beans and the lambda was reading 0v at WOT, meaning it's running lean. Can't carry on like that - could hole a piston.
Sooo.. decide the nozzles need to go out a bit bigger. When I first converted I drilled them to 2mm, so I took them out to 2.5mm. Doesn't seem a lot but when you compare the difference by eye it's a fair bit and you'll get a lot more volume of gas through there.
Also decided to up the pressure, I've taken it from about 0.79 to 1.09.
After these two tweaks I calibrated again, and went for a drive. I instantly noticed a big increase in performance. I can now rev to the redline before it warns about the injectors being fully open, and when I gave it a good spanking in all the gears joining a motorway (redline in 3rd ::) ) it logged a consistent 4.5 volts on the lambda - so it's no longer lean.
Mapping was pretty close, I tweaked this a bit.
Seems to run really nicely now - tomorrow will be the acid test :y
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I can now drive it right through the rev range the same as if it's on petrol and you can't tell the difference between the two fuels.. in fact, it seems more pokey on gas!
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i have my injectors currently at 2.5 and we still have this jolt at high revs.
Multipliers are high on mine as well and i get errors on WOT about injectors being open.
Might have a got at taking my injectors out to 3.0mm tomorrow and see if that helps
we ave set my vaporiser up at 1.2 bar as well, when i first got it it had been set at .8 bar
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Noticed the time of your post James, do you ever stop......... :D
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Noticed the time of your post James, do you ever stop......... :D
Which post? ::)
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Bet your using more lpg now ::) :-/
Prob the reason my 2.2 is a bit underpowered on lpg........i originally complained to the installer it was underpowered.....he told me he could 'up' it but i would use more lpg........so decided against it........ecu constantly complains of lean mixture on the lambda's but ive nearly done 100k since and its still going :y
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i have my injectors currently at 2.5 and we still have this jolt at high revs.
Multipliers are high on mine as well and i get errors on WOT about injectors being open.
Might have a got at taking my injectors out to 3.0mm tomorrow and see if that helps
we ave set my vaporiser up at 1.2 bar as well, when i first got it it had been set at .8 bar
Apoogies for hijacking :-/
Is this on your 2.6 with one of Jeremy's kits?
I'm going to install the front end on My 3.0 this weekend so might drill them out before I fit them for the first time.
Cheers
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bore them out to at least 3mm.
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bore them out to at least 3mm.
Is that what you have yours at?
Are you running the vap at 1 bar or have you had to up that too?
Cheers
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on my omega i have a omvl setup but i had to drill them out to 3.3mm.
on my caddy i have jeremys setup which i run at 3.2mm (maxed out) with the vapouriser at 1.7 bar.transfers back to petrol at 5000rpm,basically because it cant throw the gas in fast enough!!!!
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I had to back off the mixture on WOT on my Romano kit until it didn't cut out on load, it is slightly lean but AGWW recommended this
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on my omega i have a omvl setup but i had to drill them out to 3.3mm.
on my caddy i have jeremys setup which i run at 3.2mm (maxed out) with the vapouriser at 1.7 bar.transfers back to petrol at 5000rpm,basically because it cant throw the gas in fast enough!!!!
Do you not have the option to turn the over-run feature on and off to stop it switching back to petrol?