What is your 1.9TD pump timed at?

[dieselweasel]

My Bentley manual says not to go over .034", but farkman told me that is a VW spec and in reality timing can be advanced further.  I have mine set at .0335" right now.  Where is your pump set?

[farkman]

I can't help you with the timing on my car since I don't know what it is. After advancing the timing do you feel that your car is running better, the same or worse?

[QuickTD]

Mine was advanced until it stopped making more power, I don't know the figure either. I'm guessing its somewhere in the area of .95-1mm (.037-.039").

[VWRacer]

IIRC, fspGTD got more power as he advanced his 1.6TD engine's timing until about 1.1mm, but I think there was little gain beyond about 1.05mm. I know that's not a 1.9, but I hope he'll chime in here. The two engines are so similar that I imagine they'd respond similarly.

[fspGTD]

My testing was done on a 1.6lTD engine equipped with an '84 "CY" injection pump and 1.9lTD 2-spring injectors.  The results may or may not be applicable to you, depending on if you are willing to assume the differences in engine, injection pump and/or injectors don't matter.  But I have not seen any other dyno test like this done on other configurations, so you might find my test results useful regardless of the differences in configuration.

Summary: The only power gain I found beyond 1.00mm was way up at very high RPM, and it was only very slight.  IE: not very usable at all.  Due to the serious starting issues (backfiring) as well as extra smoking running at 1.17mm, I would recommend 1.00mm.  However, anything more retarded than that (less than 1.00mm) will significantly drop power, so be careful in setting 1.00mm precisely.  (If you want to allow for a bit of margin of error that you aren't sacrificing power, maybe try 1.05mm to be on the safe side.  Although you might experience more part-throttle smoking.)

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[dieselweasel]

Engine seems to have a bit more power after advancing the timing to .0335".  Not sure about fuel economy though...need to drive it some more.

[QuickTD]

The upper end of the factory range is 0.034, you might as well start there. You will be thrilled with the way the car runs and the fuel economy will very likely improve.

[Mark(The Miser)UK]

If your engine is a 1Y or AAZ
pump setting is 0.9mm;. Acceptable range 0.83 up to 0.97 ( 0.033" to 0.038")

[watsongs]

As a newbie to VW's, perhaps someone can enlighten me on this engine designation thing.  I've got a '79 1.5 NA, which letter designation does that work out to?  Thanks!

[Mark(The Miser)UK]

As a newbie to VW's, perhaps someone can enlighten me on this engine designation thing.  I've got a '79 1.5 NA, which letter designation does that work out to?  Thanks!

    "CK" AFAIK

[QuickTD]

If your engine is a 1Y or AAZ
pump setting is 0.9mm;. Acceptable range 0.83 up to 0.97 ( 0.033" to 0.038")

You europeans must get the advanced "high NOX" timing. Here in the land of clean air the sticker shows 0.80mm as the spec. They do run a helluva lot better set at 0.90mm though.

[Mark(The Miser)UK]

If your engine is a 1Y or AAZ
pump setting is 0.9mm;. Acceptable range 0.83 up to 0.97 ( 0.033" to 0.038")

You europeans must get the advanced "high NOX" timing. Here in the land of clean air the sticker shows 0.80mm as the spec. They do run a helluva lot better set at 0.90mm though.

 :mrgreen: Saw a natureprogram earlier that stated 3/4 of the world's nox is created by lightning and becomes fertilizer... :mrgreen:

[QuickTD]

Saw a natureprogram earlier that stated 3/4 of the world's nox is created by lightning and becomes fertilizer...

 And the single largest producer of sulpher dioxide in the US is a volcano on the island of hawaii, but let CARB ban diesels if it makes them feel all warm and fuzzy. :roll: Humans can be pretty damn presumptuous sometimes, they think they are the best at everything. Mother nature wins hands down when it comes to polluting...

[DVST8R]

My 1.6TD pump is timed at 1.05mm, the car was all stock b4 I had it done so I don't have alot to compare it too.

[dieselweasel]

Thanks for the responses everyone...I'm going to set it at .038" this weekend if the weather's decent.