

| Subject: | Re: digijet timing |
| From: | jhlauterbach |
| Date: | Mon, 30 Apr 2001 22:43:51 -0400 |
Tony, I tried to follow the book instructions with my '84 this evening. I found it somewhat confusing as to where the marks are. On the engine side of the pulley nearest the engine there is a notch like there was on US cars of 20 years ago. About 1/2 inch to the passenger's side on the opposite side of the pulley there is a depression. Which to use and if it is the depression and not the notch, where on the depression is the right spot? I have read that you are suppose to line one of these spots up with the centerline of the engine for TDC. If you are heading for 6 degrees BTDC, what do you line up with what? I was doing all of the above with both lines to the vacuum advance removed and blocked off; also, I had the digital idle stabilizer bypassed. Engine RPM when I made the final adjustment was about 900. I think that I have the timing not advanced enough as I am about 1.5 turns on the idle screw to get about 900 rpm with everything back together. Help would be most appreciated. John Lauterbach Macon, GA ----- Original Message ----- From: "Smola, Tony" <TSmola@tribune.com> To: <vanagon@GERRY.VANAGON.COM> Sent: Monday, April 30, 2001 6:29 PM Subject: Re: digijet timing > I just wanted to point out some things > regarding the message below. > 1) the stock setting is 5 degrees after top dead center > 2) full advance according to bentley is around 27-31 degrees. > 3) However when you advance your timing for performance the settings become > 6 degrees BTDC at idle and 42 degrees full advance ( vacuum lines all > connected) > 4) your throttle body idle speed screw will be about a half a turn from > fully screwed in > 5) I reccomend turning the idle up a little bit ( manual only) to help > preventing > balking following a long decelleration. > 6) I've had my 85' Westy timed like this for years with no problems ( 137K > original everything) > 7) I have had no pinging ever ( using 87 octane Chevron and Mobil) > 8) I reccomend changing the timing to zero degrees TDC, and then if you like > that go ahead and > advance the timing to 6 degrees BTDC ( remember the TDC timing mark is > the shallow groove- > not the v-notch on the 1.9 L water cooled motors. > 9) I consulted pro mechanics and got the ok before advancing my timing. > 10) this is only for water cooled, air cooled will have to stay near the > stock setting, maybe > cheat a few degrees of advance, but that is it! > > Hope this clears things up > > MAlibu Tony 85' Westy 6 degrees BTDC ( for years) 42 degrees full advance > > > > > > > ----- Original Message ----- > From: "Steve Cotsford" <Cotsford@aol.com> > To: <vanagon@GERRY.VANAGON.COM> > Sent: Monday, April 30, 2001 7:33 AM > Subject: Re: Digijet timing > > > > HI all, On the question of ignition timing I would urge you to use > > caution when advancing the timing past specs. > > When the timing is too advanced then "pinking" or "pinging" can occur > which > > is detonation too early and it can be damaging to your engine. It will > be > > most noticeable at low rpm when accelerating. I am leery of this with > the > > poor quality gas we sometimes encounter. > > On the other side of this, VW probably retarded the ignition to meet > > emissions specs and so the book timing is too retarded for maximum power. > > Try advancing a degree at a time past 5 BTC and check for pinging. Then > > back off a degree or two if you encounter this. When the engine is > very > > hot (too hot) this pinging will occur earlier. In Europe, often 10 > > degrees BTC is used but the gas has a higher octane level. > > Check the maximum advance too. This should be about 30 degrees BTC or > > perhaps a little more (vacuum advance disconnected). Maybe another > listee > > has a more accurate figure for this. > > As the vehicle spends most of its life at full advance, this is the figure > > you want to get right. > > Steve Cotsford > >
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