How to set Advance for #2?

[Rwilner]

Hi,
I have read http://www.microsquirt.info/dualspark.htm but am still confused about what value I should set for "offset (advance) for #2 (degrees)", found under Ignition --> dual/multispark options in tunerstudio.

I have a 4 cylinder 4 stroke engine, even fire, wasted spark, single crank wheel input. My trigger offset is at 291. What should this value be?

See attached screenshot for my settings

parameters.png

Thanks!
Rich

[alan_3301]

this will depend on your sensor arrangement.
If you have 2 sensors 180* apart, it will probably be set to 0*

trigger offset will set your overall timing in relation to your #1 pickup and trigger offset. If your second sensor is physically offset the right amount, the offset #2 will be 0

basically get your trigger offset right with a timing light on bank 1.
then check bank 2, if it is right with offset #2 at 0. then you are good. if not then adjust offset #2 to get your bank 2 timing light on the marks.

hope that makes sense

[Rwilner]

I only have 1 pickup -- a VR sensor. It's a single crank wheel input.

I verified with a timing light that 291 gives me what it should on bank 1 (commanded advance = measured advance).

[grippo]

If you have an even fire engine, set the offset to 0. Since you have the proper timing on bank 1, you should then get the right timing on bank 2.

Th #2 odd offset applies ONLY if you have an odd fire engine with a toothed wheel. It should be set to 0 even if you have odd fire but are using dual tach sensors, since the placement of the sensors takes care of the odd-fire part.