[Vwdiesel] Hillbilly Tuning

[James Hansen]

The "performance" setting in some of the older shop manuals is 1.00mm
Much past that, you start to get to the hot side of EGT's.
If it still sucks bag at 1.00, then you may have a "yellow dot" pump.
-james

-----Original Message-----
From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]On
Behalf Of gary
Sent: Tuesday, December 06, 2005 10:54 PM
To: vwdiesel at vwfans.com
Subject: Re: [Vwdiesel] Hillbilly Tuning


Good Question!
I have no clue how the automatic device works. But the key is to make it
go full advance.

If it's too much hassle, just set your timing to ~1.05mm and be done
with it.

I may be revising my process soon. I may knock back my timing to 1.00mm
because The engine sounds a touch too "marble-ly" at light loads.

-Gary




On Tue, 2005-12-06 at 08:01 -0800, Tim Hicks wrote:
> When you use the " Hillbilly" tuning/timing method as described below, do
you disconnect the automatic cold start valve? The directions given are for
a manual cold start valve. Thanks Tim
>
>
> Ahhh, hillbilly tuning...
>
>
>
> Here goes...
>
> -Hot engine
>
> -Cold start knob all the way out
>
> -inj pump - 3 of 4 mounting bolts loose, leave the one at the 2:00
>
> position snug.
>
> -start engine(idle)
>
> -loosen just enough to be able to rotate the pump.
>
> -roll pump (top towards engine) this advances timing. You will hear the
>
> engine speed up. At some point the engine will start to slow down or
>
> stumble. Stop, go back to that max point.
>
> -Snug a mounting bolt.
>
> -Stop engine.
>
> -Make a reference mark on the mounting flange and the pump face.
>
> -Mark a mark 2mm in the retarded direction(as in rolling the pump
>
> forward).
>
> -Move the pump to that new mark.
>
> -Tighten everything up.
>
> -in turn, loosen and re-tighten all of the injector pipes on the pump
>
> side.
>
> -Push in the cold start knob.
>
>
>
> Done!
>
>
>
> If you go back and measure injection timing, you will find the timing to
>
> be in the 1.05mm range. Some get 1.07, others 1.03, YMMV.
>
>
>
> You can forgo all of the above and just statically set the timing to
>
> 1.05mm and be done with it.
>
>
>
> I have done this to my 1980 PU and boy what a difference! Why didn't I
>
> know about this years ago with my two other Rabbits?
>
>
>
> For fueling, I set mine so that I get just a wisp of gray haze smoke at
>
> full boogey in 3rd gear.
>
>
>
>
>
> -Gary
>
>
>
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