Voltage drop in crank

Ok @67Dart273 Here are the tests I did:

Battery voltage :
Key On Engine Off: 12.51v
Key off Engine off: 12.66v

Voltage at ign 1 + ign 2:
Key off Engine Off: 0.27v
Key on Engine off: 12.61v
While cranking with key, with coil wire removed: 10.89v