867 Posted July 22, 2023 Report Share Posted July 22, 2023 The independent ignition coil has two grounds, a ground and a signal ground, which should be connected to the engine book for the ground and to the atom ground or ground out for the signal ground? Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 22, 2023 Report Share Posted July 22, 2023 What specific coil are we talking about? Quote Link to comment Share on other sites More sharing options...
867 Posted July 22, 2023 Author Report Share Posted July 22, 2023 GRID,Inc. GigaCoil IG 4セット ダイレクト販売ページ This is the coil, thank you very much, Adam. I would like to know more about trigger settings etc. Quote Link to comment Share on other sites More sharing options...
DerekAE86 Posted July 22, 2023 Report Share Posted July 22, 2023 I couldn't find much on the internet about this. But there are some instructions on this persons blog:https://minkara.carview.co.jp/userid/263196/car/161507/5138112/note.aspx It appears they want the "GND" to be connected directly to the battery negative. And then the "SIG-G" to be connected to the to the same place the ECU is grounded. So you can just splice "SIG-G" into 25 or Pin 34 on the Atom and then connect those pins to either the chassis or the engine head. I think their terminology is just making this confusing. What they are calling "Signal Ground" is not the same as the Link ECU's "Shield / Ground Out" Also the pictures in that blog post show the dwell settings too: DC8V 7.0mS (absolute maximum 7.5mS)DC10V 6.0mS (absolute maximum 6.5mS)DC12V 5.0mS (absolute maximum 5.5mS)DC14V 4.5mS (absolute maximum 5.0mS)DC16V 4.0mS (absolute maximum 4.5mS) Quote Link to comment Share on other sites More sharing options...
867 Posted July 23, 2023 Author Report Share Posted July 23, 2023 Thank you Derek, I will check when I have more time. I would like to know more about trigger settings etc. Quote Link to comment Share on other sites More sharing options...
DerekAE86 Posted July 23, 2023 Report Share Posted July 23, 2023 42 minutes ago, 867 said: I would like to know more about trigger settings etc. Trigger settings are engine/sensor dependant. They're not related to the ignition coil(s). What engine do you have and are you leaving it the factory crank / cam position sensors or fitting an aftermarket trigger setup? Quote Link to comment Share on other sites More sharing options...
867 Posted July 23, 2023 Author Report Share Posted July 23, 2023 The engine is a ZZR 1400 and the crank and cam sensors are stock ZZR. Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 23, 2023 Report Share Posted July 23, 2023 This is just a common "LS2 truck coil". In most cases the grounding on these coils is not too fussy and you can just ground both A and B to the same point on the cylinder head. However to give a more complete explanation, I will add this info: Pin A provides the high current ground for the primary side of the coil as well as the return for the spark to the secondary coil. So it is important that this is connected to the same cylinder head that the spark plug is sparking in and the wire is of adequate size to pass the current. Pin B is a low current ground reference for the ignitor circuit, the original intent is that this pin should be connected to the same ground that the ecu ignition drive connects to when active, so that the coil signal wire sees the same voltage the ecu is outputting. In the Link ecu this is the main ECU ground. The ECU is typically grounded to the engine anyhow so this is often the same location as pin A. Quote Link to comment Share on other sites More sharing options...
867 Posted July 26, 2023 Author Report Share Posted July 26, 2023 The coil has been wired and cranked, but the ignition timing appears to be way off, Is the setting not correct? Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 26, 2023 Report Share Posted July 26, 2023 You will need to adjust the trigger offset until you get the correct timing using a timing light Quote Link to comment Share on other sites More sharing options...
867 Posted July 26, 2023 Author Report Share Posted July 26, 2023 Why is the trigger offset locked and cannot be changed? Quote Link to comment Share on other sites More sharing options...
Vaughan Posted July 26, 2023 Report Share Posted July 26, 2023 5 minutes ago, 867 said: Why is the trigger offset locked and cannot be changed? Quote Link to comment Share on other sites More sharing options...
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