Author Topic: Question about shifting ignition order  (Read 127 times)

Offline nmerrill

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Question about shifting ignition order
« on: February 23, 2019, 10:14:42 pm »
5 cylinder, VAG Hall 60-2 trigger, and distributor secondary.
TDC after trigger set to 78, corresponding with Hall at tooth 13.

Timing light fires on cylinder #4 TDC (marks on crank pulley)

Since I only have a single ignition output (Pin 35) I can't shift the ignition order in the ignition outputs visual window, correct?
So, the way to adjust the ignition order would be to shift the trigger reference tooth table order, correct?

Or, could this be done by adjusting the FTT in the primary trigger visual?


Offline nmerrill

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Re: Question about shifting ignition order
« Reply #1 on: February 24, 2019, 07:18:29 am »
Well, now I'm stumped.
I shifted the reference tooth table three different times, maintaining the order, but shifting the locations
0, 24, 48, 72, 96
24, 48, 72, 96, 0
96, 0, 24, 48, 72  etc.

The timing light still flashes at #4 TDC - no change.  I don't understand this!

Rotating in the ignition visual makes no change either, as it shouldn't.

Shifting FTT moves timing of light flash as expected.  This isn't an option for this problem though.

So, how do I change ignition timing order?

Offline nmerrill

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Re: Question about shifting ignition order
« Reply #2 on: February 24, 2019, 08:59:37 pm »
Actually, adjusting FTT *was* able to correct this.
I shifted FTT to 12, adding 72 deg. of rotation, and timing light now flashes correctly on #1 TDC with ignition lock on 0.25 deg.
Left TDC after TT the same = 78.

Not sure if there is another way to approach this.
I'm still not sure why shifting the trigger reference table does not affect the firing location.