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> Magnetic fired ignition, Anyone running it on a 4?
-JR-
post Jan 20 2005, 01:27 AM
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I've been putting together my new 2+ litre engine and have been looking into flywheel fired magnetic ignition. The crank fired ignition won't work too well I guess since the front of the engine is buried in air ducting.

I am contemplating installing two of these into my flywheel to run a MSD 6AL system.

There is a nice inspection hole on one half of the case that would be perfect to mount a pickup in.

Anyone tried this beofre and if so any pics or suggestions?

Thanks!

-JR-
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lapuwali
post Jan 20 2005, 03:20 PM
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I wonder if a suitable setup would be to mount magnets on the fan, and point the sensors down through a plug machined to fit the timing hole in the shroud. Two sensors, one "south pole" sensitive, the other "north pole" sensitive. One could arrange a system where "north" was 1/4, and "south" was 2/3, with the magnets about 40-50d BTDC. This would give enough data for wasted spark and bank-fire injection. Wouldn't work with EDIS or SDS, and probably not with any other off-the-shelf system, but some custom code for the MS hardware would work with this. A modification with three magnets could accomodate SDS. The two magnet setup would be REALLY easy to generate the D-Jet trigger points signal from, so one could make distributorless ignition for D-Jet.

Hmm...

Adjusting the sensors would require machining a new plug, but as long as the sensors and magnets aren't off by more than a few degrees, adjustment could be made in software.

Big question is (don't have a car handy): can you get the sensors close enough to the back rim of the fan from the timing hole to sense the magnets accurately? You probably don't want to mount a magnet to a fan blade, and the thick "pillars" aren't conveniently located.

I'm turning into Mueller. I'm considering going Soob, but still thinking about Type IV EFI systems...
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Posts in this topic
-JR-   Magnetic fired ignition   Jan 20 2005, 01:27 AM
Jake Raby   I have incorporated BMW parts to make it work... N...   Jan 20 2005, 01:39 AM
-JR-   What sort of BMW parts did you incorporate? (Year...   Jan 20 2005, 01:53 AM
TimT   You could put the 4 magnets (4 magnets is you need...   Jan 20 2005, 02:11 AM
-JR-   Thanks for the note. Four sensors are required ...   Jan 20 2005, 02:23 AM
Jake Raby   I did it like 8 years ago.. I think it was 320 pa...   Jan 20 2005, 02:34 AM
TimT   Yes the breakerless ignition did start earlier tha...   Jan 20 2005, 02:42 AM
Mark Henry   I have it on my SDS system....it was a total PITA ...   Jan 20 2005, 06:10 AM
Mark Henry   back   Jan 20 2005, 06:13 AM
Mark Henry   back installed   Jan 20 2005, 06:16 AM
Mark Henry   I know it doesn't look that bad but to adjust ...   Jan 20 2005, 06:22 AM
-JR-   Thanks very much Mark! The parts you are usin...   Jan 20 2005, 01:49 PM
Mueller   Ben M. has mounted 2 or 4 magnets on his fan for h...   Jan 20 2005, 02:23 PM
lapuwali   I wonder if a suitable setup would be to mount mag...   Jan 20 2005, 03:20 PM
Mark Henry   Believe me I thought about almost every way to mou...   Jan 20 2005, 04:38 PM
airsix   Well if Mark thinks his is a hack he'd crap if...   Jan 20 2005, 10:58 PM
-JR-   That's all pretty good feedback. Seems like e...   Jan 21 2005, 12:11 AM
scott thacher   ...   Jan 21 2005, 12:39 AM
Mueller     Jan 21 2005, 12:50 AM
-JR-   No FI, just dual webbers! But I want to port ...   Jan 21 2005, 01:27 AM
lapuwali     Jan 21 2005, 10:56 AM


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