flyrotary@lancaironline.net Mailing List Archive

Chad,
For power firing both at the same time works fine. Several of the rotary gurus suggest it. Lynn has been building successful rotary racers for years and wouldn't steer you wrong. The only difference is if you are needing the best mileage. Then split timing works best. Check out the SAE papers Mazda posted about their Le Mans effort. They won in a fuel limited year. They used split timing and a third spark plug per housing, far trailing. Of course as soon as a rotary engine car won they banned it. Typical over reaction.

Bill Jepson

On Jul 4, 2016 10:02 PM, "Chad Peterson" <flyrotary@lancaironline.net> wrote:

Interesting,

Do you have pictures of this system?

I haven't heard of firing both plugs per housing at the same time (most fire the trailing plugs independently and the leading plugs simultaneously with a waste spark cycle). This sounds pretty good, considering only needing 2 modules instead of 3.

On Jul 4, 2016 11:45 PM, "Lehanover" <flyrotary@lancaironline.net> wrote:

One thick aluminum disc mounted on the front pulley. One iron reluctor mounted in the edge of the disc. A length of 1/4" bolt works fine. Make the disc the same diameter as a Mr. Gasket degree wheel. Mount the degree wheel on the front of the disc. Makes setting timing dead easy.

Two pickups mounted 180 degrees apart to be tripped by the reluctor.

One pickup fires an MSD or similar so as to light off a double ended coil (MSD has these) or two Blaster coils in parallel if you need the extra weight. To fire leading and trailing plugs in housing one together.

The second pickup fires housing two. Keep plug wires as short as is possible.

Adjust reluctor disc so as to fire plugs at 20 to 26 degrees BTDC. Good from idle to 10,000 RPM and 250 HP. Used on racing engines for years. Use NGK 11.5 heat range plugs gapped at .010".

Non turbo engines only. Ignition timing is so accurate that the engine appears to be not running when a timing light is used.

Lynn E. Hanover

In a message dated 7/4/2016 10:42:24 P.M. Eastern Daylight Time, flyrotary@lancaironline.net writes:

Tracy

I'm wanting to use a carbureted Renesis for my build. Eliminating both the fuel injection system and the emissions system, I have no need to keep the stock ECM. What would be the easiest ignition system to use? I'm thinking a hall effect crank angle sensor feeding an MSD 6A/Crane Fireball Hi6/similar low cost unit and three coils: one for each trailing plug and one for both leading plugs (leading plugs fire a waste spark similar to the 2nd and 3rd generation RX7s).

Would this be a matter of simply installing a universal aftermarket crank trigger kit and having the sensors trigger an ignition module? Would I need one or three ignition modules to achieve this?

Many thanks,

Chad.