On 9/16/2018 4:35 PM, Neil Unger 12348ung@gmail.com wrote:

Gents,

                  The cost of an ECU is around the $3000 plus possibly $4000 with a few fittings, which is substantial.  To simplify things a standard carby with a basic ignition systems would take a lot of money from the project.  What alternatives are there for a simple cheap ignition system to replace an ECU?

Neil Unger.

Are you willing to change the trigger wheel? You could look at the Mega Jolt (ignition only). It requires a 36-1 wheel, like Ford uses here in the USA (might be the same down under).

If you're interested in alternatives in full injection/ignition controllers, the Micro Squirt & Mega Squirt systems can both be set up for a rotary. Micro Squirt will have batch fired injectors (like almost all aftermarket systems for aviation engines). Mega Squirt can be set up just about any way you can dream up.

The Micro Squirt controller with harness is about $400 US. The Mega Squirt controller is about $600 US.

The car guys love them. Here's a link to an RX-7 forum page on the Mega Squirt:
https://www.rx7club.com/megasquirt-forum-153/

Charlie