Re: 727 ECU limits

["Bruce Plecan" <nacelp@bright.net>]

What's the quickest easiest way to extend the range of 555?.
I'll need to about thriple it, so rpm goes to 12K...... 
TIA
Bruce

 
> -> The software computes rpm in units of 25 rpm and stores this in a
> -> byte. 255 * 25 = 6375.  There are other variables in other units, but
> -> the 25 rpm one is the main variable.
>  I get the feeling messing with that could become a nasty project.
> -> The batch injector firing is still done in sync with the "RPM input"
> -> (at every 2nd, 3rd, or 4th reference pulse.)
>  Hmm... I could cut the number of reference pulses in half by modifying
> the reluctor and the fuel would be good to 12,750, which would be great.
> But I'd only get every other spark event.  Hmm... but maybe I could use
> the 4-cyl code for a distributor engine, which would send four spark
> signals per 720 degrees, except use the signals to drive two coil packs,
> each of which fires two cylinders at a time?  I'll have to try to sketch
> that out.  Might not work anyway.
>  Thanks for the help, Ludis!


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