Jordan wrote:The car that was having problem revving, I moved the sensor out to 2mm and it cleared up all the issues. Revs nicely up to 7k now. I still want to to do some investigative testing to see if I can get a better/cheaper sensor combo for rev2 of the flywheels (if there needs to be a rev 2).
This makes sense since VR signal straight is based upon speed. I think this is a fact that the OEM trigger is a true window and has no metal in the background like there is with the slots on the freewheel. The sensor could be picking up that metal at the higher speeds and not creating a clean sine wave. The trick is finding a sweet spot that supports engine start up when the cranking speed is slow.
If you are working on revision 2, I would seriously look at a different approach on how the sensor is retained in the bracket. The sensor should be located and retained in a full bore, and not tangentially in a slot at two points. The sensor tab should only prevent rotation and the sensor from popping out.
Right now the tab is doing all the work and is cantilevered out, acting like a spring board with large mass on the end. At the different engine speed thus harmonics it is hard to predict if the sensor hits some weird frequency and starts oscillating and looses signal. Best to keep the bracket and sensor as rigid as possible.
my .02