Ignition timing ref points

[Kalle Pihlajasaari]

Hi Todd,

>   <<<   From: Kalle Pihlajasaari <kalle at device.data.co.za>
>   Date: Tue, 8 Oct 1996 12:39:54 +0200 (sat)
>   Subject: Ignition timing reference points
>   ...
>   I was thinking of adding a 256 or 360 slot optical interrupter disk into
>   my distributor to give double the that number of edges every rev
>   of the dizzy (or the same resolution on the crank).  Is one degree
>   on the crank accurate enough for a totally digital one or two of
>   design for a mapped ignition.  Interrupter disks like this are   >>>
>   
>   Well again, you can do alot with less firepower than this. Not to imply that 
>   Best I ever came up with was that down in the 3 timing events per rev scale 
>   the crank accel was pretty negligible; 'Course I'd welcome some more precise 
>   input on this!

Everything you say is probably spot on.  I however like to overkill
where possible to avoid problems later.  As it is a one or two of
design the thing does not have to be particularly 'consumer' 
priced.

I want to do the timing with no interpolation so that the counter
can be very dumb and just count pulses ant any RPM and then go blip.

Cheers
-- 
Kalle Pihlajasaari     kalle at data.co.za
Interface Products     Box 15775, Doornfontein, 2028, South Africa
+27 (11) 402-7750      Fax: +27 (11) 402-7751