Engine Code: A12
Cylinders: Four
Displacement (cc): 1171cc
Rev Limit: 6400
TPS or MAP: MAP
Boosted or Normally Aspirated: Normally Aspirated
Modifications: None
Chassis: 1972 Datsun 1200 (B110) USA model
Notes:
* Mimicing factory ignition curves
* 5 degree BTDC initial timing (emission controlled model), Ported Vacuum
* Factory curve is all in by 2200 RPM
* More optimization can be done starting with this map
I hope I did this right. It seems to drive nicely. Doesn't ping.
Here are the Nissan factory ignition curves:

The digital map points overlayed on the factory chart:
