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(Cochrane Alberta Canada) Follow recent flights at: https://aprs.fi/cgmbk *******************Also YouTube channel: https://www.youtube.com/channel/UCfxJXIwvmfNlNF3gwplFw7Q

Thursday, April 30, 2020

First Engine Start on Electronic Ignition

April 30/20  Today I finally had everything connected.  It was time for the first start using the new CPI Electronic Ignition from SDS Ignitions.  The Revmaster engine fired up after three full revolutions which is it's normal cranking for startup.  The engine ran very smoothly through a few low RPM settings and then I shut it down.  A friend assisted me in setting up the initial timing of 10 degrees using his timing light.  The timing process was completed in fifteen minutes.  After timing was completed I went through the programming and set all the vacuum settings as per the default table in the user manual supplement.  The original magneto spark plug wires are tie wrapped up out of the way and the magneto switches are grounded so the mag cannot produce any spark or noise.


Sunday, April 26, 2020

Electronic Ignition connections nearing completion

April 26/20,  The plug wires are connected and the CPI control unit has been wired up.  Initial timing of the CPI was completed as outlined in the user manual using a timing light and once completed doesn't have to be done again.
Below you can see the prop bolts with the trigger and sync magnets installed into the ends of three of the bolts.  The magnets protrude 3/16 inch.  This is a top down view .  The wire is a extension of the center line of the engine case to enable using a timing light to set the initial timing angle.
 The photo below shows a refinement of the timing mark (10 deg BTC) on the crank.  I placed a piece of black vinyl tape on the crank and then a small white piece on top of the black.  This trick was  advice given from a friend at the airport who has installed the SDS system CPI units a few times.

 Below is the CPI programming unit temporarily hanging on elastics during my initial start up, testing and programming.  You need access to the programmer to monitor some settings and adjust a timing parameter.  The ignition system company recommended I install a vacuum tube for the programmer to get a major benefit.  I did not have a vacuum connections on my Revmaster throttle body so installed a nipple on the main intake tube right behind the T-body.


Wednesday, April 22, 2020

Finishing up the Electronic Ignition (Continued from July 2017)

April 22, the cold weather has finally departed and it is back to the hangar to finish up the electronic ignition.  Major components had been fabricated and installed two years earlier, now to get it completed.
Below are the original plug ends and the new MSD plug wires included in the CPI (Coil Pack Ignition).  The original plug ends were about maximum size that could be installed on the bottom  plugs, the new ones were way to big to fit.  Fortunately the new wires have a small plug on the opposite end.  I was able to install the small end of the new plug wires onto the bottom plugs by trimming off a bit of the rubber nipple on the ends.  The small plug end can be seen in the photo of the coils where I am using 4 small and 4 large ended wires on the coils.  The photo below is a end view and a top view.


Below you can see the two sizes of plug wires that I have installed onto the coil packs.  The coil packs require a 10 amp fuse to each and the CPI programming controller requires a 3 amp fuse.