727 ECU limits

[Ludis Langens]

Dave Williams wrote:
> 
> -> Software will be
> -> the problem.  It often has a limit of 6375 rpm.
> 
>  Is this a variable that can be altered, or is the code just not fast
> enough to handle 12K?

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 was assuming, since the 727 is batch fire, that there was no
> synchronization between the injector pulses and the RPM input.  But...
> ah, forgot about the spark signal.

The batch injector firing is still done in sync with the "RPM input" (at
every 2nd, 3rd, or 4th reference pulse.)

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/


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