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Thread: using high volume oil pump

  1. #1
    Senior Member MASTER BUILDER
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    using high volume oil pump

    what are pros and cons of using a high volume oil pump i SBC race engine. i have always heard drag racers they dont like them because it may suck the pan dry under certain conditions. would really like some comments on this topic as i am getting ready for oil pump install in a new engine. any comments on high pressure oil pumps? chevy art

  2. #2
    Senior Member RACING JUNKIE
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    You mentioned high volumn and high pressure. Different animals...

    I run a standard volumn BBC pump on the small block (special length oil pump drive required). Gives plenty of volumn and resonable pressure.
    JMO. Dave
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triump of evil is for good men to do nothing" Edmund Burke

  3. #3
    Senior Member RACING JUNKIE curtisreed's Avatar
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    I have never seen the need to run a high volume pump on a SBC in a naturally aspirated engine. Unless you are running huge clearances I believe the standard volume pump is plenty. Running a higher volume pump would just bypass more oil and use up more horsepower to run. Pressure is completely different. I do change the spring to have more pressure than what a stock pump has. Usually around 65-70lbs hot pressure at speed. Just my unqualified opinion.

    Curtis

  4. #4
    Senior Member RACING JUNKIE
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    Man that's a good question and i'll bet the answers will come in all kinds of different opinions. i personally run high volume pumps but i also run .0025/.003 clearance rods and mains. I use the stabndard spring (42 lbs) with 20/50 oil. It will maintain 40/50 lbs at rpm, but idles around 20/25 lbs. hot. I haven't run one yet but i like the B/BLK pump with the 3/4" pickup. The problem with high pressure is that it robs a lot of HP, causes cam distortion, wears distributor gears, and causes irratic distributor timing. If i could i'd have 25 lbs. pressure crossing the finish line or go dry sump. I do run a front distributor drive on the blower motor.

    Like i said varied opinions for sure.

    Zip.

  5. #5
    Senior Member RACING JUNKIE
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    HV77 here, stock spring.
    ***IN GOD WE TRUST***

  6. #6
    Senior Member RACING JUNKIE curtisreed's Avatar
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    Zip, you are right it seems there are always more ways than one to skin a cat. Many people develope there combination over the years and no particular way is always best.

    Curtis

  7. #7
    Senior Member MASTER BUILDER
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    Use Melling 10550

    Reeving over 7500 use 10550c

    Nasty engine use 10990c over 8000 rpm, change spring to low pressure spring.
    Competition Engines & Hardcore Engine Parts
    www.cnc-motorsports.com
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  8. #8
    Senior Member RACING JUNKIE
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    Whats the difference in the 10555 pump?

  9. #9
    Senior Member RACING JUNKIE
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    Quote Originally Posted by kwkracing
    Whats the difference in the 10555 pump?
    Here you Go,

    Zip.

    http://www.mellingselectperformance....nOilPumps.aspx

  10. #10
    Senior Member RACING JUNKIE
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    I use a high volume but I did it because my clearances are .003 on the rods and .003- .0035 on the mains.


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