[Vwdiesel] Hillbilly Tuning
gary
gbangs at cfl.rr.com
Tue Dec 6 23:47:54 EST 2005
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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