747 VSS Question

[Bob Valentine]

On a '88 G20 van I just ripped apart the VSS is optical and goes to the VSS
buffer, which is what I expected.  Saved cluster and buffer just in case
needed.

>From the '747 diagrams posted on /incoming (specifcally 747ecm5.jpg) it
shows a "permanant magnet generator"  hooked to the VSS buffer and then to
the ECM.   I thought '747 trucks used optical VSS?

Is there a different VSS Buffer for magnetic and optical?  Is there such a
thing as a '747 truck w/ a mag. VSS?

I looked in the archives and there's a ton of info about the later DRAC's,
and about eliminating the pass. car VSS buffers for TBI -> '730 convert.
I'm putting a '747 TBI on a '84 GMC pickup.     Might be able to put the
88' G20 van speedo guts in the '84 GMC pickup cluster if I need to, last
resort.

-> Bob Valentine
-> bob at tecmark.com


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