[Gmecm] 749 Shift light output

[Bill Shaw]

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!)