Paul,

Looking at Sumit’s instruction file It appears that they are enhancing the spark
but trigger is done via a distributor set up.

How does the 2nd gen CAS with it’s 2 wheels 2 tooth and 24 tooth know where the Eshaft is.
Is there a procedure for installing the CAS to get the correct position?
Am I over thinking this?

Joe Berki

Here is how to install the crank angle sensor.

However I would not use that. Take it out and save the weight.

Since you need two Summit CD's . One for the front rotor
and one for the rear. Use two RX8 type sensors with one tit
on the trigger wheel.

I would use two RX8 type sensors mounted on the front
e-shaft 180 degrees out. The trigger wheel only needs one tit.
Set the one on the left to be on when the e-shaft is
22 degrees before top dead center. Then the back rotor will
fire 180 degrees later.

This means the engine will not stop if one reluctance sensor
fails. It will only run on one rotor which should get you to the
nearest airport.


You will also two waste spark coils. One for the front rotor
and one for the rear rotor.


This will work with a carb or a very simple Maximite EFI.
It removes, from the software, the need to calculate the ignition dwell.
In Tracy's software that was about one third of the code.
If you use a mass air flow sensor instead of a manifold pressure
sensor that further simplifies the software.

Paul Lamar

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