timing settings - V twin

This forum is for discussing ignition setup, tuning, and troubleshooting for MicroSquirt (TM)
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
Post Reply
ca434sbc4
MegaSquirt Newbie
Posts: 27
Joined: Sun May 02, 2004 7:39 am
Location: Calgary Alberta Canada

timing settings - V twin

Post by ca434sbc4 »

I'm working on a V-twin using dual spark outputs. See attached pdf for a timing diagram.
36-2.pdf
(5.04 KiB) Downloaded 122 times
I have the msq set for 36 -2 ok.

What should I enter for delay teeth? 4?

Should the offset angle for #2 be +80 or -80?

Running 2.89 code.

Thanks
800vtwin
Helpful Squirter
Posts: 84
Joined: Mon Feb 16, 2009 10:06 am

Re: timing settings - V twin

Post by 800vtwin »

Delay teeth would depend on where cam sensor is and what stroke you want and what trigger offset is set at.

Offset angle depends on the actual duration between firing. +80 or -80 is +or- from the point that is 360* after #1.
Last edited by 800vtwin on Mon Dec 07, 2009 8:44 am, edited 1 time in total.
grippo
MegaSquirt Guru
Posts: 921
Joined: Mon Feb 16, 2004 6:55 pm

Re: timing settings - V twin

Post by grippo »

There is a new link to some documentation Lance and I prepared to try to make it easier to understand how to set up dual spark ignitions. It was written for the sequencer, but applies equally well to microsquirt. So try thie link: http://www.megamanual.com/seq/multichannel.htm I realize that Odd Angle fuel timing is still difficult - almost impossible to explain, and you can only get certain regions for injector open time. This came about because I had no intention of implementing odd-fire, but a simple way to handle ignition appeared and I used it. It works fine for its purpose, but it is impossible to extend it to complete fuel timing. But it will get you out of a bad place for injection, and that is good enough in most cases.
Post Reply