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-   -   Oil pressure/Oil restrictors (https://www.offshoreonly.com/forums/general-q/345308-oil-pressure-oil-restrictors.html)

89 warlock 03-12-2017 01:49 PM


Originally Posted by Baja Rooster (Post 4536792)
The stock filter head has a tiny passage inside of it. But it's super easy to just dremel it out to double its size.

Great thanks !! ill do that

89 warlock 03-12-2017 01:53 PM


Originally Posted by AllDodge (Post 4536805)
Just info not trying to change the way you maintain your motor.

Wix 51060 flow rate 0f 9 to 11 GPM and filters at 21 microns
Wix 51060R flow rate of 28 GPM and filters at 61 microns

So the standard flow filter will filter a particle smaller then a human hair, the racing filter will let something that size pass.

I don't have high flow oil pumps in my car/trucks, but sounds like you do and may need the flow rate

[ATTACH=CONFIG]565511[/ATTACH]

Yes I do have high volume pumps in them , thanks for your input very interesting

dunnitagain 03-12-2017 06:36 PM

If your fitting ID is 7/16 , your restricting the oil flow basically down to a - 7 . AN is sized by 16ths , 5/8 is 10/16 or AN -10. So your down between -6 & -8 through your
7/16 Fittings.

articfriends 03-13-2017 06:16 AM


Originally Posted by SB (Post 4536408)
Or regulator stuck open on the pump...wouldn't be a first time.

I seen a bypass in pump stick open before, under 900 rpms pressure dropped to zero.

articfriends 03-13-2017 06:20 AM


Originally Posted by AllDodge (Post 4536805)
Just info not trying to change the way you maintain your motor.

Wix 51060 flow rate 0f 9 to 11 GPM and filters at 21 microns
Wix 51060R flow rate of 28 GPM and filters at 61 microns

So the standard flow filter will filter a particle smaller then a human hair, the racing filter will let something that size pass.

I don't have high flow oil pumps in my car/trucks, but sounds like you do and may need the flow rate

[ATTACH=CONFIG]565511[/ATTACH]

Good info

articfriends 03-13-2017 06:30 AM


Originally Posted by dunnitagain (Post 4536886)
If your fitting ID is 7/16 , your restricting the oil flow basically down to a - 7 . AN is sized by 16ths , 5/8 is 10/16 or AN -10. So your down between -6 & -8 through your
7/16 Fittings.

Definately less than ideal at 7/16 id but if he really has .002 rods and mains the flow requirements to maintain static pressure wont be as high, i could also see it possibly being a restriction cold but hot I'd be looking harder.
Stock filter head with restrictive passages, they suck. Dont be afraid to take any steel adapters in your oil system that look restrictive and carefully port them if hard to find larger replacements. Ive seen hyd hose fittings on oil systems, terribly restrictive, not running 5000 psi so doesn't need as much beef! I also think if your engine builder didn't put in 30lb bypass and it was opening oil temp would be sky high

ezstriper 03-13-2017 09:34 AM

bottom line is the merc filter mount belongs in the round file for anything other than a stock setup..

mike tkach 03-13-2017 12:05 PM


Originally Posted by AllDodge (Post 4536805)
Just info not trying to change the way you maintain your motor.

Wix 51060 flow rate 0f 9 to 11 GPM and filters at 21 microns
Wix 51060R flow rate of 28 GPM and filters at 61 microns

So the standard flow filter will filter a particle smaller then a human hair, the racing filter will let something that size pass.

I don't have high flow oil pumps in my car/trucks, but sounds like you do and may need the flow rate

[ATTACH=CONFIG]565511[/ATTACH]

their is no getting around the fact that the smaller micron filter restricts flow,do i need a filter that restricts to 21 micron in my boat engine that get,s a new filter& oil change at 10 to 12 hours?NO.not with 20w50 motor oil.do i want 21 micron filtration in my daily driver that uses 5w30 and get,s changed every 5000 miles,YES.jmo.

89 warlock 03-25-2017 12:06 PM


Originally Posted by articfriends (Post 4536980)
Definately less than ideal at 7/16 id but if he really has .002 rods and mains the flow requirements to maintain static pressure wont be as high, i could also see it possibly being a restriction cold but hot I'd be looking harder.
Stock filter head with restrictive passages, they suck. Dont be afraid to take any steel adapters in your oil system that look restrictive and carefully port them if hard to find larger replacements. Ive seen hyd hose fittings on oil systems, terribly restrictive, not running 5000 psi so doesn't need as much beef! I also think if your engine builder didn't put in 30lb bypass and it was opening oil temp would be sky high

Hi I really appreciate your input you seam to be the guy with a lot of knowledge with oil pressure issues, I've read your articles and they are very informative. Is it possible for me to call you and bother you for a 5-10 minutes of your time I would really appreciate it thanks
Ritchie


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