MAP accumulator and Trigger Wheel clearence

Blue76Bay · Post by **Blue76Bay** » Wed Nov 21, 2007 2:51 am

nosfera2 wrote:Curious if any progress was made on this as I am considering doing the same.

The following link provides clear pictures of how the trigger wheel is mounted behind the impeller fan on a Type IV engine.

http://www.shoptalkforums.com/viewtopic ... sc&start=0

Hope this helps!

nosfera2 · Post by **nosfera2** » Wed Nov 21, 2007 7:55 am

Ta for the link. I was hoping to do a "bolt on" type of install, but seeing those pics makes me want to wait till I rebuild the engine and do a "proper" install like those on display.

Blue76Bay · Post by **Blue76Bay** » Wed Nov 21, 2007 10:23 am

nosfera2 wrote:Ta for the link. I was hoping to do a "bolt on" type of install, but seeing those pics makes me want to wait till I rebuild the engine and do a "proper" install like those on display.

I am considering a different approach which should just "bolt on". It involves making an aluminium ring to fit into the recess of the impeller fan opening just underneath the fan belt groove. Attached to the ring are 35 sumarium cobalt magnets to simulate the teeth of a normal triger wheel. The magnets will switch a hall sensor mounted between the fan and the alternator. From what I have read I need to build a floating supply for the hall sensor and this will trigger the EDIS module instead of the VR sensor. Apart from the mechanics of making the aluminium ring and attaching it, I wonder if this approach will work from the electronics side?

nosfera2 · Post by **nosfera2** » Wed Nov 21, 2007 1:06 pm

Blue76Bay wrote:I am considering a different approach which should just "bolt on". It involves making an aluminium ring to fit into the recess of the impeller fan opening just underneath the fan belt groove.

So on the "outer edge" of the fan itself, if I understand correctly?

Blue76Bay wrote:Attached to the ring are 35 sumarium cobalt magnets to simulate the teeth of a normal triger wheel.

Like these? -> http://www.magnetsource.com/Solutions_P ... samco.html

Blue76Bay wrote:The magnets will switch a hall sensor mounted between the fan and the alternator.

There looks like there might be a nice place in the tin to mount that depending on how close it needs to be to the magnets. The threaded recess, but will that be stable enough?

Blue76Bay wrote: From what I have read I need to build a floating supply for the hall sensor and this will trigger the EDIS module instead of the VR sensor. Apart from the mechanics of making the aluminium ring and attaching it, I wonder if this approach will work from the electronics side?

Pass, anyone else know?