Jacky Fung Posted May 11, 2019 Report Share Posted May 11, 2019 Dear Bro, I was modified my B16A to Coil on Plug on G4+. Setup correct in Link G4+ and the engine started when I set the Trigger Offset to 274. I have a stupid question. As I understand, ECU get the TDC signal from the distributor. Then direct spark. Am I right? If so, do I still need to use timing light to calibrate the trigger offset same as original? As I through, since the distributor can move in different position, it will have different timing. Also, do I need to modify the dwell time for a K20 Ignition coil? Sorry for too many question and hope you understand what I'm talking about. Jacky Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 12, 2019 Report Share Posted May 12, 2019 18 hours ago, Jacky Fung said: As I understand, ECU get the TDC signal from the distributor. Then direct spark. Am I right? If so, do I still need to use timing light to calibrate the trigger offset same as original? Yes, you will need to confirm the base timing with a timing light. 18 hours ago, Jacky Fung said: Also, do I need to modify the dwell time for a K20 Ignition coil? Yes, the dwell table you have looks a bit long for K20. Quote Link to comment Share on other sites More sharing options...
Jacky Fung Posted May 12, 2019 Author Report Share Posted May 12, 2019 Dear Adamw, Thx for your information. For dwell timing, would u suggest the dwell for k20? Thx for your help! Quote Link to comment Share on other sites More sharing options...
cj Posted May 12, 2019 Report Share Posted May 12, 2019 This is based on the Motec suggested numbers for the denso part number and works well for me on an n/a k20. You can also calculate numbers from the hondata base maps which come out about 20% higher in the 12-16v rows so if its turbo you may want to use 10-20% higher. Quote Link to comment Share on other sites More sharing options...
Jacky Fung Posted May 13, 2019 Author Report Share Posted May 13, 2019 Thx CJ. It really helpful information for me. Have a nice day!!! Quote Link to comment Share on other sites More sharing options...
Jacky Fung Posted May 13, 2019 Author Report Share Posted May 13, 2019 19 hours ago, Adamw said: Yes, you will need to confirm the base timing with a timing light. Yes, the dwell table you have looks a bit long for K20. Dear Adamw, About the timing. We need to clip the first cylinder to sync the timing signal. Is it the same to clip the ignition on the first cylinder? Thx in advance. Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 13, 2019 Report Share Posted May 13, 2019 1 hour ago, Jacky Fung said: Dear Adamw, About the timing. We need to clip the first cylinder to sync the timing signal. Is it the same to clip the ignition on the first cylinder? Thx in advance. Yes. See the help file page G4+ ECU Tuning Functions > Triggers >Calibrate for instructions how to check base timing. Quote Link to comment Share on other sites More sharing options...
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