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Jim... what kind of pressure did your 100K full flow motors have at that mileage? were you measuring it at the oil cooler output? I know your not as worried about the flickering light as I am but... I hear what your saying and it does make sense but if pressure isnt really all that important why do the performance engines go to such extent to run such high oil pressures... I think they have a rule of around 15psi of pressure for every 1000 RPM. Keith ----- Original Message ----- > > It is important to understand exactly what the pressure we > measure means. This is NOT the pressure that will be present in > the bearing that keeps the metal parts from touching each other. > The hydrodynamic pressure in the bearing is MUCH higher and is > actually generated IN the bearing BY the bearing in exactly the > place where it is needed. > > The pressure we measure is just a measure of the amount of flow > we are getting to the bearing and is an indicator of the condition of > the pump, and the flow resistance between the gauge point and the > sump (thru the passages and the bearings.) It's really all too easy > to get bent out of shape worrying about having enough pressure, > when all you really want to know is whether there is enough FLOW > to the bearing. Of course you also need good bearing clearances in > order for the journal bearing dynamics to work. > > - > ******************************* > Jim Adney, jadney@vwtype3.org > Madison, Wisconsin, USA > ******************************* > > ------------------------------------------------------------------- > List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org >