LSx coil thread
#201
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I've tested 5 different brands of d585 coils (8 units per brand) on an oscilloscope, and each had significantly less power and more variance coil-to-coil than used OEM. I would have far preferred to find a good new supplier, but we ended up having to do way more work to source, test and refurbish used ones. Granted I haven't tested NGK, but my understanding is that my experience is common across all brands, and that there are just a couple manufacturers in China producing all the new coils available.
PS, we reject about 5% of used coils because they don't match the typical scope profile. Most of those produce a spark, but are just out of spec from the years of abuse.
PS, we reject about 5% of used coils because they don't match the typical scope profile. Most of those produce a spark, but are just out of spec from the years of abuse.
Last edited by nigelt; 08-20-2019 at 10:08 PM.
#204
mkturbo.com
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Join Date: May 2006
Location: Charleston SC
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I've tested 5 different brands of d585 coils (8 units per brand) on an oscilloscope, and each had significantly less power and more variance coil-to-coil than used OEM. I would have far preferred to find a good new supplier, but we ended up having to do way more work to source, test and refurbish used ones. Granted I haven't tested NGK, but my understanding is that my experience is common across all brands, and that there are just a couple manufacturers in China producing all the new coils available.
PS, we reject about 5% of used coils because they don't match the typical scope profile. Most of those produce a spark, but are just out of spec from the years of abuse.
PS, we reject about 5% of used coils because they don't match the typical scope profile. Most of those produce a spark, but are just out of spec from the years of abuse.
#207
mkturbo.com
iTrader: (24)
Join Date: May 2006
Location: Charleston SC
Posts: 15,177
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I mean I have 5+ years on my $50 junkyard set of coils. I am still into my LS coil swap for less then 2 IGN-1A coils. I don't think they are a bad coil, and probably better then the LS coils, but we have always been price sensitive on mt.net.
I am also lazy and don't want to make a bracket for IGN-1A coils.
I am also lazy and don't want to make a bracket for IGN-1A coils.
#208
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Join Date: Jan 2011
Location: Chattanooga, Tn
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I made some changes over the winter that would have moved the curve "up" but shouldn't have changed the shape of the curve.....other than a stronger ignition system.. The shape of the curve in the upper range is the result of a strong robust spark replacing one that struggled to ignite the mixture at RPM.
that said, properly set up D585s are making tons of power on a lot of setups...but with new coils being "hit or miss" and used coils being just that.....used wear items.....if you a worried about ultimate reliability, reach out to Ben at DIY and get a set of smart coils and never look back.
that said, properly set up D585s are making tons of power on a lot of setups...but with new coils being "hit or miss" and used coils being just that.....used wear items.....if you a worried about ultimate reliability, reach out to Ben at DIY and get a set of smart coils and never look back.
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