[Gmecm] 749 Shift light output

[Robin Handley]

FWIW I'm using the Sunbird code (that ran on the '749) and configured the 
shift light to always come on above a set RPM by setting the value of EPROM 
memory location $013E (where $0000 is the address of the first byte in the 
EPROM).

4000 RPM is a valid value for this. I've successfully tested it at 2000.

HTH

Robin

----- Original Message ----- 
From: "Bill Shaw" <b.shaw at comcast.net>
To: <gmecm at diy-efi.org>
Sent: 26 February 2007 23:28
Subject: [Gmecm] 749 Shift light output


> I've just obtained a 32 valve 5.0L engine for my 928.  This should give me 
> about 90 hp more than my 16V 4.7L before I add the forced induction.  One 
> issue I have to address with the 32V is the flappy valve in the intake. 
> This is an intake resonance device that is normally triggered to open at 
> about 4000 rpm by the Bosch LH ecu.
>
> I'm thinking about controlling it with the shift light output on my '749, 
> but it needs to be modified a bit so that it triggers just on RPM,  not 
> engine load or anything else.  Has anyone modified the shift light output 
> on a '749 to be just an RPM trigger?
>
> TIA,
>
> Bill
> 928s 4.7L 5 sp. Vortech/749 (soon to be 5.0L 32V!)
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