If you firing a rotary engine six times every 10 degrees at 10,000 RPM you
need a fast crank angle sensor.

This has a rise and fall times of about 20 nano seconds. A nanosec
is one one thousandth of a micro second. Of course everybody knows
a micro second is one one millionth of a second.

Consequently a nano second is a short period of time to say the least.

Naturally I am very pleased with this device. It is molded plastic
and strong as brick. I'll be sending it off on Monday to Poul
Woelflein Germany so he can mount it on the e-shaft of an AIXRO kart
rotary  for testing our new patent pending high speed CD ignition
in a week or two.

It has the promise of reducing the fuel consumption, increasing
the power, reducing hydro carbon emissions and curing an occasional
mis-fire at idle due to port overlap. It is six times more likely
to fire a bad mixture.

The pulse width shown is about one millisecond and the pulse
amplitude is zero to 12 volts. A very solid and unambiguous signal.


Paul Lamar


Paul,   First the crank angle sensor.  Will this sensor match up with ECU,s
currently on the market or will they have to be adapted to read the signal?
What price for your sensor?
Second, while talking to Motech they keep quoting the AEM CDI inductive
coils.  There are the Smart and dumb coils.  So that I can do the
impossible
and sound intelligent, What is the difference and which suits the rotary
best?
Thirdly,  what are the advantages of your coil to the AEM coils

 Neil.

ECU's on the market wont' spark more than once. They must be reprogrammed
to spark multiple times.

The trick is use my trigger mech and disconnect the ECU from the
ignition system.

My system has the coil built in. No other coils needed. The spark comes
out of the brass
post and is connected to the spark plug with off the shelf spark plug
wire and spark
plug connectors.

Smart coils are old fashion Kettering coils with a transistor built in.
No more points.
However they work the same way
and they must be turned on well before the spark is required. It is called
dwell time and the old distributors did that automatically. Dwell is usually
about 2 ms on the RX8 smart coils so it only takes 8 ms to rotate 360
degrees at
7500 RPM. So you can see the limitations. 2 ms and you are 90 degrees
after firing time at 7500 RPM.

CD systems do not require dwell time, mine included. They fire the plug when
told to fire the plug with no delay. However CD systems on the market
use external coils and they have trouble firing more than once above
4500 RPM.

Mine can fire alot at any RPM :)


The cost of the trigger mech rough guess is about $200. Much cheaper
if you can talk the ECU guys into reprogramming as all you need then
is a traditional CAS.

Paul Lamar

Neal, One thing I forgot to mention about smart coils( AKA coil on plug).

Tracy adopted the LS1 coil on plugs from the Chev V8.  The probelms
with that is a 4 cycle engine fires half as often as a rotary and the LS1 coils
were not up to it. Tracy went trough a bunch of troubles until he put them
into a box and installed a cooling blast tube. At a given RPM twice as much
current flows through the LS1 coil when it is used on a rotary.

Also GM came out with the LS2 version that had a heat sink.

I had several discussions with Tracy on this subject but he ignored me :)

Then the RX8 showed up with coil on plugs in 2004. Early RX8 coils were
overheating and failing so Mazda came out with an improved  version around
2006. The trouble is; nobody drives an RX8 at 6000 RPM let alone 7500 RPM
continuously.  At 7500 RPM and with a 2 ms dwell time the coil is conducting
several amps for 25% of the time and gets very warm to say the least. Needless
to say I installed a heat sink on Milo's engine for the RX8 coils.


One of the revolutionary features of my coil on plug  ignition is it's extreme efficiency.
It draws less than .1 amp  (one tenth of an amp) at 10,000 RPM firing six times. It runs
cool to the touch. That feature alone means it has a bright future.


Paul Lamar



Hi Paul,
Thanks for adding me to your news letter, I am closely watching the progress.
I have a few questions for you hope you have the time to answer them for me, once again thanks
my big one is the redrive unit, are they any out there that you would recommend?
My second is where are you located, I live in California and you have mention Frys a few times
Thank you
Edgar Acosta

None that I know about right at the moment. Several people are building their own.
Not that hard to do. I am in Santa Paula. SZP

Paul Lamar



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