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Yeah, still want to advance timing. Really only need 3 speed settings, Idle -- does not matter really. Then full power and cruise speed are the two that matter. I am having all sports of grief with Fuel Tech having spent $4000 AUD on it. It is good but as always complicated. A carby plus simple ignition will do. The Rotec carby for $800 is so simple and runs on 5 PSI. Trigger wheel would be a reasonably simple change.
On 9/17/2018 11:26 AM, Charlie England ceengland7@gmail.com wrote:
On 9/16/2018 7:33 PM, Charlie England ceengland7@gmail.com wrote:
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
Oops; forgot. Len Hanover has published a method using just a couple of trigger detectors and (IIRC) Chrysler ignition modules. Same can be done with GM HEI modules. Downside is fixed timing.
Charlie
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