I am in a process of fitting distributerless ignition in my '87 BMW 316
(1.6 M10 engine). I finished assembling MegaJolt ignition control unit:
Now, when it gets warmer I have to fit it to the car. I now need
ignition map for my engine. I have default one that I can use, but
since I converted to LPG only fuel I have to make my own map.
I wanted to use original ignition curve (initial + mechanical), so I
checked my Bentley BMW E30 manual, and there is a table with total
advance (but I think that this is just initial + mechanical advance) at
different rpm. So I draw a diagram with the data from the table:
(ignore the orange and violet curves, gray is the one I am talking
It is interesting to see that ignition advance retards after 3500 rpm.
I wonder why (and how) do BMW make their distributors to do that.
My question is is this correct ignition curve? Should I use it as a
basis for further modification by adding advance based on a load
(vacuum)? Any idea how much (~8 deg)? And do I add the same value at
idle, mid-range and at max rev?
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
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