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View Poll Results: Open the hole for less restriction?
Yes open it 2 100.00%
No it's needed 0 0%
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Unread 08-02-2015, 09:26 PM   #1
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Default Tech help Oil flow

Hoping some one here has some experience with this or useful info. I'm doing a oil filter relocate with a cooler to get temps down. The entire kit is 1/2ID except this one hole on the filter adapter plate which is the 3/8. I was deburring and smoothing and started to open this hole up oval and smooth the transition. I was going to open it up to about a 1/2 ID to improve restrictions. It has now occured to me that maybe this is a restriction to increase pressure. All I keep thinking about is it's going to cause a orfice tube effect and severly drop pressure If I don't open it. So now I'm at a lost to if I should continue to open it up or leave it alone. Any advice or info?


One note the area the whole is in is maybe 7/16 slightly bigger then the whole so it seemed to me they just drilled a whole that fit in the opening.
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Unread 08-02-2015, 09:48 PM   #2
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Opening the size of the oil passage could only increase the pressure to the bearings. Depending where the oil pressure reading is taken, it may show a decrease in pressure before the adapter as you have reduced the restriction, but it would also show an increase at the bearings, which is the most important part of the oil system.

I see no problems with opening it up.
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Unread 08-02-2015, 11:36 PM   #3
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Kinda what I'm thinking. Just probably going to open it up to 1/2. Oil pressure is on top the block at the rear of the motor. So I'm guessing it's on it's way to the heads at that point. If I see lower pressures then maybe I'll rethink this. Really should be a issue car has a higher pressure oil pump in it.
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Unread 08-03-2015, 01:13 PM   #4
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should be fine, the only reason to restrict pressure is to reduce flow.If you are increasing the length of the loop, reducing flow restriction will only improve your cooling performance.
Science Dork:
You would only run into a problem if you increased the flow to the point where you were encouraging turbulence which would result in physical damage to your piping, pump and components in the long run. With oil though you would have to have a huge boost in flow to encourage erosive wear
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