Coil saturation measurements
After a lot off speculation about my coils dwell time i decided it was time to put the theory to the test. First i measured the coil-packs primairy resistance: both coils have 0.9 Ohm pri.
After that i measured the voltage across the coil- and GND (using the wire from v3 to coil als shunt). Surprising results!
Coil saturation time turned out to be ~9.8 mS, with a supplied dwell period of 10.4 mS. Battery voltage was 14.63 V [Scopeshot of the experiment]
![[Scopeshot of the experiment]](http://www.vems.hu/files/DaveBrul/coil_saturation.jpg){kind=link}
How can this be ???
Well as it turns out modern coils are designed to almost never saturate, the above experiment coild have killed the coil.
Therefore i strongly suggest not to try the above experiment with modern type (below 3 Ohm primairy resistance) coils
See also:
- DummyIgnition page for tips how to safely determane coil dwell values.
- [page that inspired me to try it in the first place]
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