Oil pump volume vs pressure

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Chevy2184

New member
Ok I'm sure this is on the site somewhere and has already been discussed before? But I couldn't find anything? So I am trying to get my game plan together for my new power plant... And wanted to ask on the oil pump? High volume? High pressure? Stock? I'm going to run a 10qt pan from Armando... It's not going to be a super high revving motor? Will prob not see north of 6k building it for good dependable hp and torque... Any input?

Thanks
Jason
 
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ChryslerJet

New member
Chevy2184 said:
Ok I'm sure this is on the site somewhere and has already been discussed before? But I couldn't find anything? So I am trying to get my game plan together for my new power plant... And wanted to ask on the oil pump? High volume? High pressure? Stock? I'm going to run a 10qt pan from Armando... It's not going to be a super high revving motor? Will prob not see north of 6k building it for good dependable hp and torque... Any input?

Thanks
Jason
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My 2 cents and take it as that is High Volume not High Pressure, but that is for building motors for Drag racing not water use.  I planned to go with the same mentality on my motors though.  I might tweak the pressure a little to boost it over stock but that's why I like my mopar pumps I can adjust the pressure.
 
Patchman

Patchman

Administrator
Staff member
I've always ran high volume pumps in any performance builds. Just mite have to restrict flow based on lifter type. :smile30:
 
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Chevy2184

New member
Planing on going with a comp cam roller hydraulic cam and roller lifters.. Patch how do you mean restrict the flow?
 
73 Sanger Flat

73 Sanger Flat

Active member
Install restrictor plugs in the cam gallery..  Behind the cam gear I believe is where they are ,, Should be some larger pipe plugs and behind them is where they are .. It will restrict how much oil is pumped up to top of engine .. You can pump the pan dry if not careful ..
I would go High Volume also
 
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Carnivalride

New member
FWIW

I run the standard Mellings M77 on mine. I blueprint them And run the standard 60 psi spring. I've run this way for over 22 years with no oil related failures. Rememberit takes power tomove that oil.
 
73 Sanger Flat

73 Sanger Flat

Active member
yes the aftermarket block have the same plugs . I have a Tall Deck Dart Big "M" block and that is how we control the oil to the top of the engine ..
 
73 Sanger Flat

73 Sanger Flat

Active member
I never had them in my block until I went to a big Solid Roller cam , so I do not know if you need them for a Hydraulic Roller Cam .. My engine builder installed them back then .. I am the one that just tears the engine up after they fix it for me .. LOL
 
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Carnivalride

New member
Brazos River Rat ( Billy ) said:
I never had them in my block until I went to a big Solid Roller cam , so I do not know if you need them for a Hydraulic Roller Cam .. My engine builder installed them back then .. I am the one that just tears the engine up after they fix it for me .. LOL
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Billy if I was you I'd go back and relook at this. I run a standard oil pump just cleaned up and blue printed and no oil restrictors. I can't understand why on a performance build why so many want to run high volume/ high pressure and then have to use oil restrictors to keep from draing their pan.

Just my $.02

 
73 Sanger Flat

73 Sanger Flat

Active member
Not sure Loren why ?  My oil pressure was about 15 lbs hot and in gear .. Maybe a little too much clearance on the bearings ??? I don;t know .. I just drive the boat and tear stuff up ..
 
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Carnivalride

New member
Chevy2184 said:
Ok I'm going to throw it out their because I don't know?? But how do you blueprint a oil pump?
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Radius and deburr the casting where oil flows but the biggie is to make sure the gears are only .0025" under the housing typically they're more and at idle that's why you can have low oil pressure. If you carefully sand that housing down with some emery paper on a good flat surface so the gears are only .0025" lower than the housing you'll be surprised how much difference that alone makes at idle with hot oil.
 
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Carnivalride

New member
Brazos River Rat ( Billy ) said:
Not sure Loren why ?  My oil pressure was about 15 lbs hot and in gear .. Maybe a little too much clearance on the bearings ??? I don;t know .. I just drive the boat and tear stuff up ..
Click to expand...

Have you disassembled and checked your oil pump? That Dart block has priority oil to the crank and rods anyway. Bearing clearance can cause low oil pressure at idle especially with hot oil but if you check your pump clearance like I mentioed in the above post that'll make a big difference. I have 25lbs hot at idle.
 
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Chevy2184

New member
No I'm going to buy a new pump... This is a new build and I was just wanting to make sure I put in the right oil pump... So at this point I can get and install what ever pump? Just want to do it once and have it right?
 
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