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

ive got the bike tuned as well as it can be with carbs but its not good enough so I want to step up my game to EFI and run a fuel only (for now) setup

the bike:1994 zx9r
ign: cdi wasted spark

from the reading ive done, I know I can not just hook the micro up to the neg side of the coil for a rpm input. So I need to hook directly up to the VR sensor, will this work and what wire do i wire it to on the micro? this is what the stock kawi timing wheel looks like and the sensor that reads from it.

just thinking out loud but I have the rpm wire that the tach on my bike reads from hooked up to my wideband (zetronics) box to data log air fuel and rpm and that doesn't affect the wideband box at all so could I just hook up that tach output to one of the option wires?? and presto?

The tach wire is probably your best bet, although I'd hook it to VR+, which has a higher input impedance and is less likely to interfere with the signal.

thanks for the reply Matt, Ill try hooking it up like that this weekend to see if the micro can "see" the rpm signal and report back

didnt get around to it this weekend due to laptop problems

ok just had some time tonight and i hooked the tach wire to the VR+ the vr- the option+ and the option- and none of them read any sort of rpm signal. used a voltmeter on the tach signal after trying to hook up the wires to see what it was giving out and it seemed to be 6.xx volts that got lower the higher i reved the bike, any advice?

something I should note, I did mess with the settings in tunerstudio (rising edge ect.) and still nothing, next im going to hook directly to the pickup sensor.

didnt hook up to the pickup sensor yet, think about a dyna2000 and hooking up to the tack out on that. also did some reading and found out the wideband zeitronics box im using can only "see" square wave rpm signals, knowing this ill try to hook the micro up differently and mess with the settings in ignition set up

Hi mate,

Why do you think you cant take a reference from the coils?

And have you considered just going the whole hog and fitting a 36-1 trigger wheel?

Cheers

Slingy

The OP says this is a CDI system, so coil-negative doesn't work.

BBE - try to connect the square-wave pattern to your opto+ pin, ground the opto- pin.