The Ford Barn

pistonbroke · 01-06-2022, 11:55 AM

All right , this is a topic that can go many ways but it is just meant as stated. I know we've cover full flow verses bypass filters and high volume verses stock oil pumps. So this is not a question on those topics. Would it be beneficial to open up the restrictor in a bypass filter system and run a high volume oil pump? In my simple mind it seems you would clean and cool more oil faster. This was just something that came to me while cleaning engine parts. Oh that thinking outside the box can get you into trouble.

51 MERC-CT · 01-06-2022, 12:22 PM

Just for your information the stock bypass oil filter system passes 5 qts. of oil in 11 minutes at idle speed as measured.

tubman · 01-06-2022, 12:24 PM

Ford engineers did know what they were doing, even back then.

19Fordy · 01-06-2022, 01:01 PM

I would think that enlarging that orifice would lower your oil pressure reading.

ford38v8 · 01-06-2022, 01:33 PM

If it ain’t broke, don’t fix it.

pistonbroke · 01-06-2022, 02:48 PM

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Thanks guys for your thoughts.51 merc , I would never have guessed that much oil passed thru the system in that amount of time. And yes I to believe the ford engineer's new what they were doing . Oh well, back to cleaning parts. Tim

Ronnieroadster · 01-06-2022, 02:55 PM

Don't think the original system did any oil cooling. Now if the bypass hole was increased in size that would create a reduction in oil pressure. Using a high volume pump to correct that problem should work. But would the original oil filter canisters be able to hold back the additional flow and increased pressure without the top lid gasket leaking?
Ronnieroadster

Don T · 01-06-2022, 08:08 PM

My 2 8BA's (CND engines, 50 & 51) do not have ANY restrictor on the input side of the oil filter. None, Zero, only the normal diameter of the fittings and the tubing, there is not one attached at the block. The only restrictor is in the standpipe in the canister (one small hole) which is the downstream side of the filter. The filter canister is holding full oil pressure. That said the seal is a ONE TIME use only or the canister will leak.

Nailhead Jeff · 01-08-2022, 09:19 PM

I've put engines together without an inlet restrictor, a fresh motor will have about 5-10lbs at a hot idle, put the factory restrictor in and it jumps up to 25lbs. Never tried opening up the orifice on the outlet.

01-06-2022, 11:55 AM	#1
pistonbroke Senior Member Join Date: Feb 2021 Location: Perry Mo. Posts: 475	oil filter flow volume All right , this is a topic that can go many ways but it is just meant as stated. I know we've cover full flow verses bypass filters and high volume verses stock oil pumps. So this is not a question on those topics. Would it be beneficial to open up the restrictor in a bypass filter system and run a high volume oil pump? In my simple mind it seems you would clean and cool more oil faster. This was just something that came to me while cleaning engine parts. Oh that thinking outside the box can get you into trouble.

01-06-2022, 12:22 PM	#2
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: oil filter flow volume Just for your information the stock bypass oil filter system passes 5 qts. of oil in 11 minutes at idle speed as measured. __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

01-06-2022, 12:24 PM	#3
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,303	Re: oil filter flow volume Ford engineers did know what they were doing, even back then.

01-06-2022, 01:01 PM	#4
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,921	Re: oil filter flow volume I would think that enlarging that orifice would lower your oil pressure reading.

01-06-2022, 01:33 PM	#5
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 6,633	Re: oil filter flow volume If it ain’t broke, don’t fix it. __________________ Alan

01-06-2022, 02:48 PM	#6
pistonbroke Senior Member Join Date: Feb 2021 Location: Perry Mo. Posts: 475	Re: oil filter flow volume Sponsored Links (Register now to hide all advertisements) Thanks guys for your thoughts.51 merc , I would never have guessed that much oil passed thru the system in that amount of time. And yes I to believe the ford engineer's new what they were doing . Oh well, back to cleaning parts. Tim

01-06-2022, 02:55 PM	#7
Ronnieroadster Senior Member Join Date: Dec 2010 Location: East Coast in CT Posts: 1,524	Re: oil filter flow volume Don't think the original system did any oil cooling. Now if the bypass hole was increased in size that would create a reduction in oil pressure. Using a high volume pump to correct that problem should work. But would the original oil filter canisters be able to hold back the additional flow and increased pressure without the top lid gasket leaking? Ronnieroadster __________________ I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH

01-06-2022, 08:08 PM	#8
Don T Member Join Date: Mar 2017 Location: Alberta Canada Posts: 93	Re: oil filter flow volume My 2 8BA's (CND engines, 50 & 51) do not have ANY restrictor on the input side of the oil filter. None, Zero, only the normal diameter of the fittings and the tubing, there is not one attached at the block. The only restrictor is in the standpipe in the canister (one small hole) which is the downstream side of the filter. The filter canister is holding full oil pressure. That said the seal is a ONE TIME use only or the canister will leak.

01-08-2022, 09:19 PM	#9
Nailhead Jeff Junior Member Join Date: Mar 2013 Posts: 10	Re: oil filter flow volume I've put engines together without an inlet restrictor, a fresh motor will have about 5-10lbs at a hot idle, put the factory restrictor in and it jumps up to 25lbs. Never tried opening up the orifice on the outlet.

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