I was looking at DTA's sample BMW M3 S50B32 map to get some ideas for mine.
This engine runs COPs (as far as I know), but in the "Coil per plug" settings, it's switched off. How have they been wired up?
It also has twin spark ticked, but is that actually 2 plugs per cylinder or some kind of software hack to perform a different function?
Is it possible to group 2 COPs together in 3 pairs or are COPs supposed to be fired sequentially?
I'm used to wasted spark so this is all new to me.
How to wire up coil per plug?
Re: How to wire up coil per plug?
Sorry, ignore or delete. Page 5 on the wiring diagram explains how they fire.
Re: How to wire up coil per plug?
This is good question even it is explainend in diagram. This twin spark setup is used when one wants to run coil on plug system as wasted spark (no cam sensor).
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Re: How to wire up coil per plug?
I think that DTA's option of "Twin spark activated" is very confusing as so many users assume that this means twin spark plugs, why they didn't just say "Wasted spark" I don't know!VR6Turbo wrote:I was looking at DTA's sample BMW M3 S50B32 map to get some ideas for mine.
This engine runs COPs (as far as I know), but in the "Coil per plug" settings, it's switched off. How have they been wired up?
It also has twin spark ticked, but is that actually 2 plugs per cylinder or some kind of software hack to perform a different function?
Is it possible to group 2 COPs together in 3 pairs or are COPs supposed to be fired sequentially?
I'm used to wasted spark so this is all new to me.
Martin
Re: How to wire up coil per plug?
Yep, it's what I assumed too because some 911s and Alfa Romeos do actually have 2 spark plugs per cylinder.
So if I wanted to run COPs as wasted spark then, thereby avoiding the complication of sequential firing, I just wire each COP to a coil driver and then tick "Twin Spark"?
This is good info. I'm glad I asked now!
So if I wanted to run COPs as wasted spark then, thereby avoiding the complication of sequential firing, I just wire each COP to a coil driver and then tick "Twin Spark"?
This is good info. I'm glad I asked now!
Re: How to wire up coil per plug?
So to clarify this should be ticked if using individual coils as wasted spark but should not be ticked if using a coil pack !
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Re: How to wire up coil per plug?
I do agree, but it is more versatile than wasted spark. It's primary intention was for rotary engines where there was a leading and trailing spark.mefmotorsport wrote:I think that DTA's option of "Twin spark activated" is very confusing as so many users assume that this means twin spark plugs, why they didn't just say "Wasted spark" I don't know!VR6Turbo wrote:I was looking at DTA's sample BMW M3 S50B32 map to get some ideas for mine.
This engine runs COPs (as far as I know), but in the "Coil per plug" settings, it's switched off. How have they been wired up?
It also has twin spark ticked, but is that actually 2 plugs per cylinder or some kind of software hack to perform a different function?
Is it possible to group 2 COPs together in 3 pairs or are COPs supposed to be fired sequentially?
I'm used to wasted spark so this is all new to me.
Martin
But of course it's handy that with a 0deg offset it can be used to achieve a wasted spark setup too.
Re: How to wire up coil per plug?
Thanks for that, I understand how it works now!