AYSZ bin

[Ludis Langens]

Jeremy Gonyou wrote:
> 
> This is a junkyard find from a Lumina Z-34, 3.4 V6 DOHC.
> 
> Looking at the code I've found something of deep concern:  Whereas most code
> has an rpm variable that goes up to 4800, AYSZ has a similar variable, but
> it only goes to 3600 rpm.  This is the variable that is used to lookup up
> the main spark advance and VE2 (VE2 normally goes to 6400 rpm)
> Sooo... it appears to me that GM is treating the engine the same whether it
> is revving at 3600 or *twice* that.

Then you haven't looked at the code enough!  The DOHC has lots of RAM
variables holding various RPM indices.  The main spark table goes up to
4775 (or 4800) rpm.  The VE2 table goes to 7150 (or 7200) rpm.

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

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