running the motor toward redline usually add an extra 10-15psi of oil pressure on top of your base pressure, so you DO NOT want this oil pressure going through the turbo. as for BB turbos there's an internal restrictor is for this reason---prevent high oil pressure pushing through the seals. AN-3 oil feed line is the way to go, but you can use AN-4 with an inline restrictor.Carl H wrote:if so it has an internal restrictor that could have caused oil starvation because the stock turbo is bb............
you know the infamous turbo seals failure?
