[Vwdiesel] The importance to lining up oil pump gears with markings on ea...

LBaird119 at aol.com LBaird119 at aol.com
Fri Oct 9 12:40:41 PDT 2009

In a message dated 10/9/2009 12:13:26 PM Pacific Daylight Time, 
syncronized_turbo at yahoo.co.uk writes:

> Running the 155s on an NA will retard your 
> timing, as the pump reaches the necessary pressure later in its stroke 
> (Which, if I'm not mistaken, are why TD pump timing specs are more 
> advanced than NA specs? I think?).

  Actually I think both time at 1.00 or maybe the Na time at .95 but 
then NA pumps time at .88, 1.15 and .95 and it has to do with the 
cam plates not the injector pressures.  Since liquids are basiclly 
non compressable (for the most part), it's highly unlikely the timing 
will really change since it's not set by pressure.  In theory it takes 
longer to built that bit more pressure but it seems to be pretty minimal. 
The biggest change I can see would be slightly less fuel for what the 
pump's set for.  Higher pressure injectors will close earlier than NA set 
injectors thus less fuel.  Shouldn't be anything big, just like any 
change in timing.  I'd run them.

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