Quote:
Originally Posted by KillerBMotorsport
Generally porting only makes sense if you're running large clearances, super high RPM, and high viscosity oil. Really, it's how they did things back on 2007 and it worked OK for the time, but the knowledge and tech has improved quite a bit since then. No one does it anymore.
Larger and/or ported pumps (and passages) are more snake oil than anything. You can make a bigger improvement by adding a 20-cent washer and shimming the pump's bypass. That will net you ~2-4% improvement in flow/pressure, which really, isn't enough to save your engine vs it's natural pressure.
Also, the pumps on the Suby engines (especially the FAs) are grossly oversized to accommodate the AVCS system. Under load and high RPM where flow is at its highest, only ~40% of the pump's total capacity is going through the engine. The rest is being bypassed.
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Does that basically mean that aftermarket oil pumps do nothing for the oil issue (apart from purportedly being more reliable)?