Inductive vs Capacitive Ignition

Okay, time for a new topic.............

Let's pretend you have a roots or screw blown high boost hemi, methanol, capable of 10,000+ rpm. Pro Mod type deal. Let's also pretend that your tune-up is already near optimal.

So you decide one day to go to individual coil per cylinder ignition.

Now there are two routes you can go down. Inductive or Capacitive.

Remember this is high boost, methanol, 10,000+ rpm, and a coil per cylinder.

Thoughts on one approach versus the other?

TOL.

 

Wow. 139 views, and nobody has chimed in,,,,,,,

 

A few people, but the prime popular example for what we do is the IGN1A inductive coils with built-in IGBT's.

Some people refer to this as the "Mercury Marine" coil, but that is not true. Yes it was adopted by Mercury for their turbo QC4V engine, but it was originally designed by Lance Nist together with the manufacturer.

Each coil draws roughly 20 amps, depending upon RPM and dwell time, and of course each coil is only fired once every 720 degrees.

Each coil is triggered by a low level signal from the ECU, so no noisy ignition boxes or RFI/EMI radiating wires.

They must be used as CNP form factor (short ignition leads) as opposed to COP.

 

I think Ignition Technology is moving into new horizons. Technology right now is leap forging. May take a couple years to settle down and see what has moved to the fore front. Pretty sure it will not be the ol stand by Magneto.

 

Agree with you 110% ............

We need to go back to physics, electronics, and form factor.

Fuel is fuel, and many people have that figured out (sort of), at least at the port fuel level. I cannot imagine anybody doing direct chamber injection of methanol or nitromethane.

Engine control, including efficient ignition competency, will be the future.

No more MSD (Might Stop Discharging).