7730 and dis

[Bruce Plecan]

Would you share the part no., or application of that sensor?.
Does anyone know which, of that sytle sensor is the most compact?.
Thanks
Sleepy


| No matter how large the wheel, the slots should be about the same width as
the
| metal tip on the Mag sensors, which IIRC correctly are around 1/4" (the
metal
| tip, that is). That's also the size of the slots in the cast-in metal
wheel
| that's part of the GM engine cranks.

| We use this system on our eXperimental aircraft engines as part of our
KIGN
| system, and we find that often the built-in linear advance curve in the
DIS
| module itself is perfectly adequate. If you make the wheel as a flat steel
| plate, you might wanna use a configuration John Carroll perfected, and
passed
| along to us, which I've put up on the FTP site, named:
| PlanarWheel.jpg
| which shows the sizing, and some slit/split openings that accentuate the
flux
| reversals. Shown next to the timing wheel in roughly the correct mounting
| position/orientation, is a stock GM mag crank pickup.
|
| BE precise when you machine those semi-holesNslots, cuz even tho there's a
PPL
| in the module to lock up the slot jitter, the module does NOT like a wheel
| that's made sloppy. Best to cut the wheel slots with a rotary table on a
milling
| machine.
|
| Finally, if you wanna build an ultra-reliable racing IGN system with dual
DIS
| pickups/coils and waste-fire coil joiners (no single point-of-failure can
kill
| the IGN system), AND/OR add some fancy programmable advance curves, those
| schemes will be available as licenseable PLANS from AirSIG in the
| not-too-distant future. Just gotta get EGOR and KEFI out the door, and
KIGN will
| be next in line.
|
| Gar
|