[Vwdiesel] Injection pumps Bosch VE --( Pump pressure and smoke )

[H .Hagar]

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The internal pump pressure is so important , that I feel it is ok to say it=
 again.  This is aimed at Will Taygan and Greg Rich.     Those old tired en=
gines need pump pressure to produce advertised power without smoking.
For the VW  068 130 107 A  and the rest of that line  here are the pressure=
s=2E ( try to verify for yourself )

      500 RPM   2.4  to 3.0   Bar.   34.8  to  43.5  Psi.

     750 Rpm    3.5  to  4.1  Bar    50.8  to  59.5  Psi.

   1000 Rpm    4.6  to  5.2  Bar    66.7   to  75.4  Psi.

The tricky part is the fact that pressure decreases little bit by bit so it=
 is hard to tell by driving when it is too low.
How to tell if timing is working ??? well that's a more difficult one.Feeli=
ng the cold start cam is one way , the cam pressure should disappear at abo=
ut 2000 RPM (engine) . With the proper pressure it is possible for the timi=
ng to stick for many reasons , such as gummed up.One thing for sure it will=
 not work without lots of pressure. I have a spring in my hand , trust me t=
hat is one hard spring to compress with your hands (about a 1.5 inch long c=
oil).
Use an old inlet banjo to add a gauge to outlet.I machined a longer centerb=
olt to hold the two banjos required.works like a charm. Piece of cake , can=
 see pressure while driving ---even.
Picture avilable on request. Can we do anything if pressure is too low ??? =
 yes we can  , but that another time.   Hagar.

PS: Note that  Pump pressure is measured at pump RPM.
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