Need some Electrical Engineer help, Voltage step-up and/or regulator Options

[Brando]

Hey there,
On my never-ending quest to make my L-jet more modern and reliable at a cost less than an aftermarket injection system, I'm needing the help of an electrical specialist.

I plan to be switching over to a hall-effect sensor that reads pulses at both TDC and BDC of the flywheel. I have my magnetic poles to attach to the flywheel as well as the sensor (Speed/Ref sensor from a 944). The problem being the sensor normally has 1.2 ~ 1.5 Volts going through it for Motronic. I believe I can safely pass 12V ~13V max through the sensor without frying it. Problem being my injection system, receiving the trigger through this sensor, would have to see 16V ~ 18V. I would need a way to step up the voltage from 12V to 16V-18V.

Since changing over to the hall-effect sensor will require some drilling and tapping of the case (not to mention balancing the flywheel), I plan to use the tach-output from my Mallory MSD box to trigger the tach and injection. Basically the box puts out a 12V square-wave which doesn't have enough voltage to trigger the tach or ECU. So I also need an electrical component that would take that 12V and turn it into a 16V-18V spike, as well as limit the voltage to 18V. I have not measured the amperage going through that circuit. I was thinking of running a small coil (same one I had to use for the points on the tach output to the ecu/tach but I don't know if that much voltage will cause it damage.

So, I need some help. Can anyone assist?