What the point of drilling piston to enlarge holes while

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What the point of drilling piston to enlarge holes while

17-12-2013

vrooom

Senior Member

Join Date: Oct 2009

Posts: 563

What the point of drilling piston to enlarge holes while

you can use lower viscosity oil to achieve same result?

I often see people drilling their piston to enlarge the holes then use higher oil weight...

what is the reason behind having enlarged pistons hole?

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