Re: How to do 165 to 730

["Bruce Plecan" <nacelp@bright.net>]

Why'd ya do the extra work?
Hmm is your's a digitial dash?.

The "normal" operation of the 165 uses a VSS in the speedo head, in which
case as long as you had a speedo cable you'd be fine.

The 90 730 uses a A/C generator to buffer to ecm.

For a 730 to use the speedo VSS, there is a bit and wire change for it to
work.

Just dawned on me with that tranny you may be using a reluctor output to
buffer and doing the same thing as the digital dash F-Bodies did, rare for
the F-Bodies, don't know how common in the vettes.
Grumpy




> I have a 90 ZF6 trans using the stock 90 vss feeding the 165 ecm and the
> speedo runs perfect.  Maybe vet's are different.
> Mark
> ----- Original Message -----
> From: "Bruce Plecan" <nacelp@bright.net>
> To: <gmecm@diy-efi.org>
> Sent: Tuesday, June 27, 2000 2:21 PM
> Subject: Re: How to do 165 to 730
>
>
> >
> > > If I wanted to change my 87 Vette to 730, how would I do it, in
> > > general.
> > > Do I need to change a lot of wiring/connectors?
> > > No... just need to take all the pins out of the 165 harness, and put
> > > then in the 730 connector.
> > > I just use the wiring diagram  which I still have to find (think is
> > > on ftp site) find it on 165 diag, and 730 and swap.. I used the wires
> for
> > > the maf so that I did not have to add any.
> > > Do I need to add any
> > > other sensors besides the MAP?
> > > Nope
> > > Where does the MAP go and how do I put it
> > > there?
> > > I put mine on fire wall.. use the oem hose from map and stick it on
> > > one of the vacume ports on ps near rear...
> > > FPR gets the vac signal from same spot.
> > > Thanks.
> >
> > will take a *custom* chip for the VSS in you 87.
> > Grumpy
> >
>
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