Re: Timing marks yet again - mystery solved?

[Dan Bubb <jdbubb@ix.netcom.com>]

Well, the computer still has to have a set point and on 85-86 GTI's with
knock sensor ignition and computer the set point is 6 BTDC. That's the
notch as Peter pointed out. TDC is a little cast in "0" about an inch or
so to the right of the notch.
Dan

Curt Voss wrote:
> 
> I wandered down to talk to the local VW wrecking yard and he sez that since a GLI has a knock sensor, it only has a TDC mark. The ignition timing is set to TDC and once the motor's running the computer takes over so there's no need for any other ignition timing mark. Therefore, the diamond-shaped notch I'm seeing is TDC. Does that sound right to you all?
> 
> ---
> '86 Scirocco 8V, soon to be sold
> '82 Scirocco 1.8 8v - the daily driver
> '81 Caddy
> '78 Rabbit 1.7L rustbucket in semi-retirement
> 
> On Sun, 26 Aug 2001 19:15:35   thescirocco wrote:
> >On Sun, 26 Aug 2001 16:05:58 -0700 "Curt Voss" <curtv@eudoramail.com>
> >writes:
> >> The timing mark question once again rears its ugly head... I don't
> >> recall getting a definitive answer on this before, so here it is
> >> again. I have a 210 mm flywheel out of an '87 GLI, at least so it
> >> was marked when I got it from a wrecking yard. I can only find one
> >> timing mark on it, a diamond shape cut into the flywheel. Is that
> >> TDC or the ignition timing setting? The only other thing I can see
> >> that could be a timing mark is a big square raised lug, but that's
> >> not generally a timing mark, is it? Unfortunately my Bentley only
> >> covers through '84 and shows nothing like this.
> >> ---
> >> '86 Scirocco 8V, soon to be sold
> >> '82 Scirocco 1.8 8v - the daily driver
> >> '81 Caddy
> >> '78 Rabbit 1.7L rustbucket in semi-retirement
> >
> >The diamond shaped notch is the 6 deg BTDC timing mark.
> >
> >Just to the right of the diamond shaped notch, on the side of the
> >flywheel, there is a small "o", this is TDC.
> >
> >HTH,
> >Peter - http://thescirocco.com -Techtonics, Autotech-Quaife USA,
> >Magnecor, & Peloquin, Discount Dealer -  Bear, DE
> >
> >'79 Scirocco 16V "Retro"
> >'83 GTI "Caged Rabbit"
> >'84.5 Scirocco "Oddball"
> >'84 GTI
> >SciRollers: '79 White Champagne Edition, '84 Black, '88 Red
> >
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