7747 spark control questions.

[rr]

The '747 aldl does not output the SA value. It's easy to patch the aldl
xmit table to send it instead of some other value.

BobR.

Programmer wrote:

> >Does the bias not reflect what the distributor initial timing should be set
> at?<<
>
> All the timing decals I've seen are "0" EST bypassed.
>
> >Why would you have a value like this unless it was just for something like
> ALDL output?<<
>
> I don't recall even seeing a spark value on a scan tool for a 7747 truck
> app. Tech 1 maybe ?
>
> >> You could just add 10 degrees to the timing tables and set the
> distributor at 0.  No need for subtraction in the timing table<<
>
> Well---that's how I thought it was.
>
> What is the raw value for the 50kpa at 600rpm?
> >
> >Squash
> >

<big snip>

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