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Where and how is the best method for attaching an AIM speed sensor and magnet. I saw one vee that has the pickup attached to the right front brake backing plate, and I believe I remember the magnet attached to the outer rim of the drum, but I do not recall how the magnet was attached. If gluing the magnet to the drum works, what type of epoxy will withstand drum heat?


Guidance and photos or alternative locations welcomed and much appreciated.

Jim

There are magnets mounted in a threaded sleve. 10/24 I think. Drill and tap the drum and align the sensor in the backing plate. I use a spot inside the shoes and mount the magnet on a web brace of the drum.

Jim,

There are a few old threads about this topic on this forum. You can search under "magnet sensor" and find some useful ones.

Bruce

Thanks guys, I searched and found some threads as suggested. Now I'm trying to figure out how to attach a tach sensor to the crank pulley, my AIM Mychron xg does not like the coil input.

Jim,

Make sure you are using the wire marked 150-400v (I think it is the white wire) to hook up to the secondary side of the coil. Don't use the the one marked 12v (I believe it is the blue wire) Also sometimes I have to use the AIM RPM filter to get a clean square wave so the RPM data is accurate.

You should not need the crank sensor.

I ordered the aim rpm filter, not cheap. Hopefully it will do the job. I'm also using a shielded wire from the coil to the aim tach input, but it's not helping much.

What is the problem you are having? If it is dirty data then the RPM filter should fix it.

For whatever reason I have had to use the filter on all but one of my FV's

Yes, noisy signal, rpm fluctuation due to noise.