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Jacky Fung

COP on a B16A

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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

TriggerOffset.jpg

Dwell.jpg

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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.  

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image.png.3308b4d8b13f703378743dd6b74fc8e1.png

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.

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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.

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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.
 

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