747 Timing Connector and misc questions

[Shannen Durphey]

Jason Weir wrote:
> 
> Bruce Plecan wrote:
> 
> > At min idle speed, yes.  If you race the engine, you're goofing things
> >
> > up.  Just set the timing with the at like 600ish rpm.
> 
> I have no problem setting the timing. I just wondered what the connector
> was for, I know it disables initial advance at idle but what I didn't
> know was that it still advances at higher RPM's.  Another reply said
> that the ECM has a backup timing curve in case the ESC module quits to
> retain driveability.
> 
Actually what I intended to say is that the timing advance
you are seeing with the bypass disconnected is built into
the module.  Once the bypass line is opened, the ecm cannot
control timing.
<snip>
Shannen