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Che
az supporter
Joined: Thu Mar 11, 2010 10:30 pm Posts: 2401 Location: Perth
Vehicle: LPG 1.6 Sierra
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 Posted: Sun Dec 15, 2013 7:32 pm |
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I went to SCA today to get a few things for the car, new spark plugs being one of them, but they didn't have an info/selection chart for their NGK spark plugs.
I had to come to confirm what i'm using, and by the time I did so i'd smashed a couple of bourbons and the car was parked up for the day. I've currently got BK6ES's installed. Just wondering, if you know your plugs, is this the best option to use in a straight LPG G16A? So many options available I was just left scratching my head.
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Che
az supporter
Joined: Thu Mar 11, 2010 10:30 pm Posts: 2401 Location: Perth
Vehicle: LPG 1.6 Sierra
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Posted: Mon Dec 16, 2013 8:07 am |
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No takers?
Reading up on the NGK site recommends (for LPG) that I switch from BP6ES to BP7ES, reducing my gap by 10%, and will want more spark at the arc point. I don't know the reasoning why, but I guess that's my next topic of research.
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Scrawny
I live here!
Joined: Tue Jan 29, 2008 10:30 pm Posts: 10528 Location: Brissie
Vehicle: Popemobile
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Posted: Mon Dec 16, 2013 9:06 am |
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Good luck getting BP7ES plugs, they might be a special order thing. That's a slightly colder plug to handle the higher octane. You could try an MSD ignition or something to get more spark?
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JrZook
Joined: Tue Aug 08, 2006 11:30 pm Posts: 5517 Location: Holland Park
Vehicle: Awesome!!
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Posted: Mon Dec 16, 2013 11:26 am |
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What the issue with your current ignition/plug setup?
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royce
omnipotent being
Joined: Sun Jun 11, 2006 11:30 pm Posts: 17216 Location: Pluto
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Posted: Mon Dec 16, 2013 11:57 am |
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put BP (OR BK) 6EY and leave it at that, will make bugger all difference in different heats I reckon, the Y means its a V groove so in theory forces the spark to the edge
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Che
az supporter
Joined: Thu Mar 11, 2010 10:30 pm Posts: 2401 Location: Perth
Vehicle: LPG 1.6 Sierra
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Posted: Mon Dec 16, 2013 8:22 pm |
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JrZook wrote: What the issue with your current ignition/plug setup? Nothing, just curious of the NGK recommendations. I have noticed the car runs a bit hotter at highway speeds, but I have a feeling that's due to my throttle body change and a slightly leaner WOT fuel mixture. I did get the LPG mix setup properly but it was sucking fuel like a truck. The LGP tuner said I can experiment with the WOT setting if I want to try and improve economy, just watch the temp gauge as too lean will be too hot. If I can track them down I might try a '7' range spark plug - at worst it's a $20 experiment. Otherwise i'll give the 6EY plugs a go.
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Che
az supporter
Joined: Thu Mar 11, 2010 10:30 pm Posts: 2401 Location: Perth
Vehicle: LPG 1.6 Sierra
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Posted: Sun Dec 22, 2013 11:48 am |
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Well the 7ES plugs were easy to find and have been in for a week - turns out they're the same plugs old 911s use. Seem to have made a positive difference, although it now takes a helluva lot longer to get the engine up to temperature (which will be a PITA in dead winter).
On the up side, the timing now seems absolutely bang on, engine vibration at idle has virtually disappeared, and the temperature gauge isn't budging when I hit the highway. No difference to fuel consumption at this stage - i'll hold my thoughts until i've run through a couple of tanks of gas.
Not sure if these effects are due to new spark plugs or to the 7ES change, but i'll take the improvement either way.
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Rhinoman
Joined: Mon May 16, 2011 7:03 pm Posts: 686 Location: Brinkworth, England
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Posted: Mon Dec 23, 2013 2:36 am |
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That sounds exactly like the issue that I had with motorcycle plugs, you may be better off with a 6 grade NGK platinum plug. I used to used the platinums on my race bikes, they had a wider operating temperature range and were a lot cheaper than a proper racing plug. I didn't suffer the long warm up but they maintained a good spark under much higher than normal combustion temperatures.
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