NC30 ignition curve

[whizzo944]

Anyone point me to a link or whatever for an Ignition curve for either a standard NC30 or HRC ignition box?
I am in the process of fitting a programmable ECU to my NC30.
Thanks in advance,

Dave.

[CMSMJ1]

Hi Whizzo.. Welcome to the site.. Go have a look in the tech section about the programmable ignitions (thread by me..)

I have several maps used and have created various advance graphs to show the differences..

Stick about, go tell us about yourself in the newbies

[lutorm]

Hey, I was looking for this, too, but I can't find this post being alluded to. Anyone have a link?

[whizzo944]

Hello Lutorm :-)
If you follow this link, I have posted the standard and HRC ignition curve graphs there.

http://s870.photobucket.com/albums/ab263/whizzo944/



Dave

[lutorm]

Cool, thanks!

Are those wiggles really real? I would have expected the advance to be a smoothly increasing function with rpm, not go up and down?

[whizzo944]

Hello,
I think the dip at 5000 rpm might have something to do with noise testing, not the engine running well :-)

Dave

[lutorm]

Now that I'm all set up to run the ignition with my Microsquirt, I finally got around to measuring the ignition curve with the stock ignition unit. The data clearly resembles the previously posted curve, including the dips at 4-5k and above 7k, but there's an overall shift in that my points are higher at low rpm and lower at high rpm.

[lutorm]

Hey Dave,

Revisiting this thread now that my bike is running with the Microsquirt. I measured the stock ignition timing very close to your curve. However, now that the bike is running, I'm getting pretty severe knock if I try to run anything above 35 degrees at the first peak around 6-7k RPM, even at a lambda of 0.86. Did you end up using the timing curve as measured?

I guess I should double-check that I have the timing right...