I'm going over your site and like very much...
I have been doing rotarys for many years ..
Please get back to me..I have lots to share..
Rick Course

Rick, what do you use for an FET driver?
I am currently using a CD4050 but I would
like something with fewer pins.


Paul Lamar

Hi Paul...I have an EFI driver board that produces an extreemly stable,
square wave injector drive that I made in the early '90's...It is acualy an
engine controler with NO extra inputs..just direct fuel control.  An
electronic "barrel valve" if you will..  I normaly use a TPS for "on time"
or a 5-10K pot for dyno..  I have also used it for start up on new engines..
just turn in the fuel, as required.  I have played with lots of intake
designs, fuel injector locations, spray paterns, flow rates.  and I realy
got a kick out of the 2 speed pump article...I had variable voltage input to
the pump back in the early 80's.  Thats when I got my first rotary engine in
an RX-3 coupe...after a tubo instalation, I put all my bigblock chev stuff
under the bench...then in the mid 80's I got involved with RMI marine.  I
proto typed distributorless CD ignithion.  coil/ plug with individual
advance curves per plug, and rev limit.  When the heads of Mazda (7 of them)
team leaders came to work out a large engine purchase order, I had a long
dicussion with head of rotory engine development and the adjustable intake
for the 4 rotor lemans engine was designed between us..in our heads
anyway...If you have any memory about 1/2 water 1/2 gasoline days, that came
out of my garage..in my RX-3!  and it was fast!  (for a street car)..  Now
that I have tooted my horn, (LOL) yes I have had a love affair with the
little engine that CAN, for a long time..  As to the mosfet I use, it is an
IRF 531..It was a powerful fet back in the 80's...I have used different,
newer versions recently and find that the turning on the injector hard, does
not hurt it in any way!  No peak and hold needed...fuel running through it
does the cooling!  I use two drivers, and can fire 8 injectors per
driver...pulsing!  it is a high current device..3-pin..  like I said...lots
to share..stay in touch..  I have lots of videos and pictures from years of
work..

Rick Course....Happy New Year!

Send us some jpgs. I am really interested in what you have been doing.

We need a super simple system anybody can understand and fix. We can
aways manually lean it at cruise.

Paul Lamar