I've been going back and forth with Geoff from Gerko, Ryan, and Fidanza clutch trying to come up with a good solution for a flywheel.
currently fidanza produces a 14lb alumunim flywheel for mopar engines for $300, but it's for carbed applications. We can't machine in notches for the cps to read because aluminum is non-ferrous so the CPS wouldn't read.
Geoff's solution has been to machine a steel ring with notches that bolts to the aluminum flywheel so the cps will work. The problem is it is extremely costly and that puts it out of the scope for most people.
Geoff does manufacture a crank trigger, but factoring the cost of the crank trigger, and a flywheel there is no cost savings to be had.
He is working on a lightened one piece steel design, and I will be trying the first prototype, but he is currently expanding his business so this will take a while before he gets started on it.
My other thought was to get steel slugs inserted into the flywheel for the cps to read, but then the signal would be reversed. The stock Ecm is looking for gaps in the flexplate, where this would have (bumps) for lack of a better term.
I believe I should be able to make it work without an issue because I'll be going MegaSquirt and I can configure the cps how I wish.
Does anyone know exactly where the cps reads on the flexplate? does it register the drop in voltage from the falling edge? (steel to air space), or does it register the rising edge (air space to steel)?
I'd like to come up with an affordable solution for the time being.