spark question
12-13-2012, 01:45 PM
#1
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Dirt Scooters
spark question
Does anyone know if both spark plugs fire at the same time? I know they are on the same coil so i would guess they fire together? Hemi's have dual plugs like us but the second set fire on the exhaust stroke to help burn any left over fuel for emissions.
12-13-2012, 01:59 PM
#2
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I read that they fire at the same time.
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CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
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12-13-2012, 02:23 PM
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2005 E55 AMG
I can't find where I read it but it apparently switches from staggered to simultaneous depending on the load. The could explain why they are labled A and B.
12-13-2012, 02:41 PM
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2005 E55 AMG
This isn't where I saw it but it describes the same thing:
http://www.ehow.com/how-does_5017050...dule-work.html
http://www.ehow.com/how-does_5017050...dule-work.html
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12-13-2012, 06:02 PM
#8
Out Of Control!!
12-13-2012, 06:20 PM
#10
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I wish but standalone would take way too much work. I will need all the spark I can get though......it will be something like the gates of hell for sure 
12-13-2012, 08:25 PM
#13
Out Of Control!!
Wrong. The point of dual plugs its to clean up any unburnt fuel and therefore clean up emissions. They are staggered in firing. Another gem of info from you
http://www.alfa145.co.uk/tech_pages/ts_theory.html
http://www.alfa145.co.uk/tech_pages/ts_theory.html
Last edited by blackbenzz; 12-13-2012 at 08:27 PM.
12-13-2012, 10:50 PM
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06 E55 AMG, 13 C63 AMG
When you see plugs being fired on the exhaust stroke, it is not to clean emissions. Won't have any affect there. That is likely a spark waste ignition system. This is where there is one coil that fires two cylinders. One will be on the compression while the other cylinder is on exhaust. It is just cheaper as they cut the number of coils down. No benefit in performance. It does cause the plugs to wear/erode much faster and these systems typically use dual grounding electrodes.
If you can access a wiring schematic for the coils you can look to see if there is more than one control wire controlled by the ECU. If there is only one I would think that both plugs are fired together. If there is more than one control wire each plug could be fired independently.
If there is one control wire there can still be more than one firing event per cycle, but both plugs will still be fired together.
You can get more spark energy out of the current system so you can fire through higher cylinder pressure by increasing the supply voltage to the coil. There are products on the market that will do this.
So, whatch'a working on??
G
If you can access a wiring schematic for the coils you can look to see if there is more than one control wire controlled by the ECU. If there is only one I would think that both plugs are fired together. If there is more than one control wire each plug could be fired independently.
If there is one control wire there can still be more than one firing event per cycle, but both plugs will still be fired together.
You can get more spark energy out of the current system so you can fire through higher cylinder pressure by increasing the supply voltage to the coil. There are products on the market that will do this.
So, whatch'a working on??
G
12-14-2012, 06:45 AM
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Dirt Scooters
When you see plugs being fired on the exhaust stroke, it is not to clean emissions. Won't have any affect there. That is likely a spark waste ignition system. This is where there is one coil that fires two cylinders. One will be on the compression while the other cylinder is on exhaust. It is just cheaper as they cut the number of coils down. No benefit in performance. It does cause the plugs to wear/erode much faster and these systems typically use dual grounding electrodes.
If you can access a wiring schematic for the coils you can look to see if there is more than one control wire controlled by the ECU. If there is only one I would think that both plugs are fired together. If there is more than one control wire each plug could be fired independently.
If there is one control wire there can still be more than one firing event per cycle, but both plugs will still be fired together.
You can get more spark energy out of the current system so you can fire through higher cylinder pressure by increasing the supply voltage to the coil. There are products on the market that will do this.
So, whatch'a working on??
G
If you can access a wiring schematic for the coils you can look to see if there is more than one control wire controlled by the ECU. If there is only one I would think that both plugs are fired together. If there is more than one control wire each plug could be fired independently.
If there is one control wire there can still be more than one firing event per cycle, but both plugs will still be fired together.
You can get more spark energy out of the current system so you can fire through higher cylinder pressure by increasing the supply voltage to the coil. There are products on the market that will do this.
So, whatch'a working on??
G
12-14-2012, 10:53 AM
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Didn't have any problems before but i might in the future....... I sent a coil out to someone that builds coils for big power mod motors and LSx engines that are still running coils to see what they think.
12-14-2012, 11:38 AM
#18
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Wrong. The point of dual plugs its to clean up any unburnt fuel and therefore clean up emissions. They are staggered in firing. Another gem of info from you
http://www.alfa145.co.uk/tech_pages/ts_theory.html
http://www.alfa145.co.uk/tech_pages/ts_theory.html
From your own link.
As ignition takes place in two locations rather than one, this enable more efficient combustion and cleaner emission. However, besides Alfa, in the past 15 years only Mercedes and Porsche have ever applied Twin Spark design to their engines. This is mainly because of the complexity of cylinder head - it would be too difficult to put 4 valves and 2 plugs into the small cylinder head area
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
Last edited by splinter; 12-14-2012 at 12:21 PM. Reason: delete personal info
12-14-2012, 12:15 PM
#19
Out Of Control!!
Are you serious? You clearly missread your own copied and pasted link, in your haste to jump this thread. Ignition takes place in TWO locations, not at two seperate time events. The two locations meaning, that one plug on each side of the combustion chamber.
From your own link.
As ignition takes place in two locations rather than one, this enable more efficient combustion and cleaner emission. However, besides Alfa, in the past 15 years only Mercedes and Porsche have ever applied Twin Spark design to their engines. This is mainly because of the complexity of cylinder head - it would be too difficult to put 4 valves and 2 plugs into the small cylinder head area
From your own link.
As ignition takes place in two locations rather than one, this enable more efficient combustion and cleaner emission. However, besides Alfa, in the past 15 years only Mercedes and Porsche have ever applied Twin Spark design to their engines. This is mainly because of the complexity of cylinder head - it would be too difficult to put 4 valves and 2 plugs into the small cylinder head area
http://www.crossfireforum.org/forum/...lug-heads.html
