trwebb26 Posted October 16, 2009 Share Posted October 16, 2009 I've already searched and read all of the posts on this forum and many other concerning this topic so hear me out. The holset service manuals for the turbo's that fit well with our L6's (HX35, HY35, HX40, HC351, etc) all say that the minimum required oil pressure at idle is 10psi with a 72psi max. http://www.myholsetturbo.com/modelinfo.html I normally run right around 8 psi at idle and never get higher than 70psi when driving (autometer guage and turbo oil pump). I read that most people put a restrictor in the oil send line. This would just reduce the pressure of the oil at the turbo. Am I missing something? It doesn't seem like a good idea to run a restrictor for the holset, oil cooled turbos on an L6??? Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted October 16, 2009 Share Posted October 16, 2009 Its more important to have good crank case evacuation going on so there isnt any pressure build up in the drain tube. Im planning on running my valve cover and crank case vents to the xhaust with the 45 deg pipe method. Quote Link to comment Share on other sites More sharing options...
trwebb26 Posted October 16, 2009 Author Share Posted October 16, 2009 I don't see how... the restrictor is changing the amount of flow - therefore the delta P across the restrictor? Quote Link to comment Share on other sites More sharing options...
rossman Posted October 16, 2009 Share Posted October 16, 2009 My earlier post was wrong so I deleted it. Flow is a function of area and pressure. Quote Link to comment Share on other sites More sharing options...
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