Toobuilder
Well Known Member
While I opened the door to the performance of Ross' new CPI ignition product in this thread, I figured I'd show you the nuts and bolts here.
First off, Ross has a bunch of parts to make a complete installation kit for the 4 banger Lycomings, but he's still ramping up the 540 stuff. I've been following development of CPI for a while and just couldn't stand it anymore- so after begging him for the basic components, I had to develop my own "installation kit".
First up is the hall sensor bracket. I came up with the .250 thick mount plate, a machined .750 dia x 1.9 spacer, and a 1.9 inch long, 5/8 hex "nut", which I machined to length, drilled and tapped for the case stud.
The extra long NAS bolt shown replaces the lower case through bolt, and the two 10-32 lock nuts complement the capscrews holding the hall sensor to the bracket. Also, the spacer and nut are machined to the exact length needed to provide the correct air gap for the hall sensor. If anyone wants to try this installation before Ross gets the 540 parts out, shoot me a PM, I can provide more specific dimensions/drawings.
Here is the whole thing installed and ready for the ring carrier (flywheel)
Here's the ring carier installed. Ignore the hieroglyphics on the back side. That was me trying to get my head around magnet positioning. (Quite easy, actually)
Though the coil can be mounted anywhere, I decided to keep the wires short and mount it on the backbone of the case. Simple aluminum extruded angle stock and a couple more spacers.
Here is the coil ignitor module, mounted just behind the coil on the backside of the baffle. The overly thick mount plate shown is my attempt at a "cold plate" heat sink. That, coupled with the large surface area of the rear baffle should ensure the ignitor never generates more heat than it can handle.
And finally, the whole package. (And yes, the rear baffle seal is flipped out of the way for the picture).
You will have to excuse the seemingly hasty installation shown on this picture. I'm out of room on this panel and this is one of the few places left that I can get at it easily. Eventually, the brain will be hidden. Once the curve is set, I'll lock down the settings and forget about them.
First off, Ross has a bunch of parts to make a complete installation kit for the 4 banger Lycomings, but he's still ramping up the 540 stuff. I've been following development of CPI for a while and just couldn't stand it anymore- so after begging him for the basic components, I had to develop my own "installation kit".
First up is the hall sensor bracket. I came up with the .250 thick mount plate, a machined .750 dia x 1.9 spacer, and a 1.9 inch long, 5/8 hex "nut", which I machined to length, drilled and tapped for the case stud.
The extra long NAS bolt shown replaces the lower case through bolt, and the two 10-32 lock nuts complement the capscrews holding the hall sensor to the bracket. Also, the spacer and nut are machined to the exact length needed to provide the correct air gap for the hall sensor. If anyone wants to try this installation before Ross gets the 540 parts out, shoot me a PM, I can provide more specific dimensions/drawings.
Here is the whole thing installed and ready for the ring carrier (flywheel)
Here's the ring carier installed. Ignore the hieroglyphics on the back side. That was me trying to get my head around magnet positioning. (Quite easy, actually)
Though the coil can be mounted anywhere, I decided to keep the wires short and mount it on the backbone of the case. Simple aluminum extruded angle stock and a couple more spacers.
Here is the coil ignitor module, mounted just behind the coil on the backside of the baffle. The overly thick mount plate shown is my attempt at a "cold plate" heat sink. That, coupled with the large surface area of the rear baffle should ensure the ignitor never generates more heat than it can handle.
And finally, the whole package. (And yes, the rear baffle seal is flipped out of the way for the picture).
You will have to excuse the seemingly hasty installation shown on this picture. I'm out of room on this panel and this is one of the few places left that I can get at it easily. Eventually, the brain will be hidden. Once the curve is set, I'll lock down the settings and forget about them.
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