I have this hub plate (1/8" th) drilled for the 13b front pulley bolt
pattern. No longer needed. Is this useful for your timing plan?

Robert LeClercq

Ah a missing tooth trigger plate.
I have never been able to write software or come up with reliable
missing tooth hardware.
I have not spent a lot of time doing it however.

Mazda uses it on the stock RX8 and the rest of the teeth give them an
angular
reference and a tach signal. All this is more important for a car engine.

I want to make things as simple as possible and use the same timing for
spark
and injection so two CAS's and one tit are super simple for aircraft use.

If I wanted to add RPM it is quite easy to measure the time it takes
for the trigger pulses to arrive.

Paul Lamar


I wasn't suggesting the missing tooth format. Just offering the alum. hub already match drilled for the front pulley.  I attached it to  an off the shelf sprocket from McM Carr and cut off teeth. That's a Ford timing wheel, also surplus.

Robert LeClercq

Am I missing something? Is it two and a quarter inches  long to fit in side the double V belt front pulley?


Paul Lamar

No, I had installed it to the front of the pulley.

On Sunday, September 10, 2017 1:20 PM, paul lamar <rotaryeng@earthlink.net> wrote:


Robert LeClercq

I would not do Joe any good as it just has a missing tooth.

Paul Lamar


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