Tom Sixkiller wrote:

"Russell Kent" wrote in message
...

How does it vary from PRISM? http://www.gami.com/prism.html

Uh, by being available for experimentals now? :-)
Seriously, GAMI's PRISM is cool and is expected for STC/377 in the (near?)
future. I don't think it's shipping yet. I believe that Light Speed
Engineering's ignition is intended for the experimental market only (no
plan
to pursue any FAA certification).

So, different target markets.

I was speaking of _operationally_.

Both systems use capacitive discharge systems to make longer duration, hotter
sparks. The GAMI PRISM system uses a pressure sensor in the cylinder (part of
the spark plug assembly I believe) to measure the cylinder pressure during the
combustion event. It uses that information to alter the timing of the spark for
best performance. This also makes it compatible with varying grades of fuel.
The LSE Light Speed has no such pressure feedback, but does use manifold
pressure and RPM to affect the timing and duration of the spark. I do not know
if the PRISM uses MAP or RPM for timing curve manipulation.

Russell Kent