Honda B16a : Offset Timing & Delay

[johnny_9]

Calibrating the Triggers (Setting Base Timing) on a B16a 

This what I get from the default file for Gen 6 Honda - are these good starting values?

Offset = -85 degree BTDC (seems a bit extreme?)

Delay = 0 microseconds

[Simon]

As the trigger mode is generic and covers a huge range of applications the offset is often very far away from 0.

You will just need to adjust on the car to make the timing correct.

[Stevieturbo]

I did a B16A a year or two ago and it came out around 175deg.

 

I fitted a coilpack to mine afdter frying the amp inside the Honda dizzy, although still used the dizzy for the trigger.

[Stevieturbo]

Trigger offset is you telling the ecu when TDC occurs relative to the crank trigger wheels markings. It has nothing to do with the cam position as such.

 

[johnny_9]

Technically after setting timing at idle rpms, and we rev to say 3,000 rpm, and there is a "drift" - what actually is the causing the drift, and shouldn't it get worse at say 6000 rpm?

[johnny_9]

Technically after setting timing at idle rpms, and we rev to say 3,000 rpm, and there is a "drift" - what actually is the causing the drift, and shouldn't it get worse at say 6000 rpm?

[Simon]

This is what the ignition delay number is for. This corrects for the retard in timing as the RPM increases.

If you are using the Honda igniter make sure you have set the dwell edge correctly as it is opposite to most applications.

[johnny_9]

Ok thanks. The "retard as RPM increase" - how much is that normally? 2 degress?

Just want to understand more.

Is that steady higher rom fixed at say 5000 rpm

or 

As you blip the throttle 3000 - 5000 rpm - retard happens as the engine as throttle is blipped - and is this more to timing belt flex or a delay in the electronics in the ECU

[johnny_9]

ok, read the help. thanks.