[Gmecm] 749 Shift light output

[Bill Shaw]

Perfect,  thanks Zaphod.

Bill

davesnothereman at netscape.net wrote:
>   
>   What I missed in the my first reply was the corresponding value at 0x013D, minimum value for shift light on. Setting both 0x013D and 0x013E to desired threshold with 13D being slightly lower should effectively force the light on or off based on RPM.
>  
>  The variables related to the shift light are posted here:
>  http://www.diy-efi.org/pipermail/gmecm/2006-June/002009.html
>  
>  Zaphod
>  
>   
>  -----Original Message-----
>  From: Robin at FuryWorld.fsnet.co.uk
>  To: gmecm at diy-efi.org
>  Sent: Thu, 1 Mar 2007 3:30 AM
>  Subject: Re: [Gmecm] 749 Shift light output
>  
>   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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