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Refer above - Ignition setting for B18D. There are 3 variations of B18D engine - B18D Type 1 uses A camshaft, B18D type 2 and 3 uses B camshaft. I think your K camshaft was an upgrade.
A-kam Lift: 10.5, Duration: 260
B-kam Lift: 10.6, Duration: n/a
K-kam Lift: 11.95, Duration: 268
The Bosch 0231170085 dizzy is a vacuum retard type. Also the original dizzy that comes with B18D. So the ignition has to be set (without vacuum) at a fairly advanced timing (22-24 BDTC) so that when vacuum is re-applied timing comes back to normal ie. being retarded to maybe 10-12 BDTC. And the plug still fires before piston reaches the top. A vacuum retard dizzy is usually connected to vacuum port on intake manifold. Whereas a vacuum advance dizzy is connected to vacuum port on carb (this setup on different engine).
In case you're wondering, I'm still doing maintenance on wifey's 3-cylinder 1997 Daihatsu with carb. Her first car. Didn't want to sell it off. As expected, the original Denso dizzy had worn out and replaced with 3rd party manufactured item. Hard to get original these days. The Denso had both advance and retard diaphragm. 3rd party quality not the same with original. So I had to play around with the timing.
Amarin.
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