MicroSquirt.com read only forum (Jan.15,2018)

so i have finally had a win with this.

i hooked a Bosch "dumb" ign module up to the factory pick up in the stator and used that to trigger to optical input in the the microsquirt.
http://au.bosch-automotive-shop.com/pro ... ule-bim024
I now have RPM in tuner studio when kicking the bike over.

i have spark and injector pulse so now i need to check its in the right spot

That makes a lot of sense noahr31, because the BIM024 processes VR signals from a distributor set up normally, and converts it to an on/off signal for the coil, but if I am not mistaken it has a built in dwell circuit too. As you aren't involving high currents (amps) I doubt the Bosch unit will behave as it was designed to do, and you'll soon now if you make a bench test rig. If you could hook a similar system up to an electric motor, you'd know for certain.

There's some good info here

Mike

PS BTW, magnets actually boost the AC signal on a VR sensor, and you can test this, because the VR signal becomes more gap or low speed tolerant. I did this with a Renault VR crank sensor, that wouldn't trigger my MicroSquirt v2 at cranking speed. The bigger problem I had was the magnets ran in oil, and at higher engine temperatures it would destroy their magnetism ultimately, so I changed to a Hall sensor set up for reliability in the end. Just a heads up for anybody else though.

Thankyou for that information mike
It was very informative.

I'll spin the rotor/ stator up in the lathe and see how it performs at higher revs.

Otherwise i have a tooth wheel and VR sensor i can adapt to the crank however it will require considerable machining on this bike. For that reason i would like to stick withthe OEM pick up if possible.