Dry Sump Oil Pump, Pro's & Con's
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Dry Sump Oil Pump, Pro's & Con's

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    Senior Member Ahsumtoy's Avatar
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    Default Dry Sump Oil Pump, Pro's & Con's

    I use low tension rings and a vacuum pump on a NA motor. I have heard people say that a dry sump oil pump creates vacuum as well. So I'm considering switching to a dry sump system and wondering what the pro's and con's are, besides cost and "clutter".

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    AKA Blownjet 468 Blowncat 509's Avatar
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    the only con's to a dry sump IMHO, is what you already posted!(and of course, having
    to send all the new fittings, brackets, pullies, etc, back to have them annodized gold!)
    love your setup, it's over the top!

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    Senior Member stix818's Avatar
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    I agree with Blownjet.. I can't think of any cons other than cost, clutter and weight..

    Pros: Less windage in the motor, Constant oil feed regardless of acceleration, deceleration, hard turning, etc.. Provides some more vacuum on the motor..
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    Senior Member wagspe208's Avatar
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    Looks cool! Big pro.
    Wags

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    Senior Member alkyexpress's Avatar
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    Quote Originally Posted by stix818 View Post
    I agree with Blownjet.. I can't think of any cons other than cost, clutter and weight..

    Pros: Less windage in the motor, Constant oil feed regardless of acceleration, deceleration, hard turning, etc.. Provides some more vacuum on the motor..

    X-2 on the constant oil feed . I have a Barnes pump , with all gears(on the pressure and scavenging side), on my blown motor it spit a valve cover plug (rubber push in ) into the lake . JMO if you wanted a lot of vacuum I would get a pump with rotors on the scavenging side . ... E
    Last edited by alkyexpress; 12-09-2010 at 09:49 AM.

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    Senior Member Ahsumtoy's Avatar
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    Quote Originally Posted by Blownjet 468 View Post
    the only con's to a dry sump IMHO, is what you already posted!(and of course, having
    to send all the new fittings, brackets, pullies, etc, back to have them annodized gold!)
    love your setup, it's over the top!
    Thanks for the compliment. Making them purdy is easy. Making them work, thats another thing....

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    Senior Member alkyexpress's Avatar
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    BTW -- I was going after oil pressure all the time (when slowing down), Not vacuum, ...E

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    gn7
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    The only other con besides the ones you mentioned is weight. But the pros out weight the cons. Besides the ALMOST guaranteed oil supply, it will free up some hP. Partly due to the vacuum, but you already are doing that. But from less oil flying around the crank. Can be as much as 50 HP on a BBC depending on the stoke and the current pan. On a BBF its alittle less.



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    Village Idiot fc-Pilot's Avatar
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    Some of the other cons are cracking fittings and having the inside of the suction lines collapse. I have only seen a line collapse internally once, but it was on the line from the supply line therefore not allowing oil to the motor. I have seen fittings crack a handful of times. Other than that it is the way to go. If I saw it as that bad of an option than I would not be planning two dry sump motors myself.

    Paul

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    gn7
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    There is no doubt that system failure is an issue. Just way more pieces involved. Belts breaking, getting pitched, pulley shearing keys etc. I have seen most them. But it is still the best "racing" oil system.



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    Village Idiot fc-Pilot's Avatar
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    Quote Originally Posted by gn7 View Post
    But it is still the best "racing" oil system.

    Yep. I just wanted to make sure it was clear for those who have not yet played with them just because it says dry sump does not mean it can't have a failure.

    Paul

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    Senior Member Ahsumtoy's Avatar
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    Okay, next question. How many stages do I need and where to scavage from? I am using a Dart aluminum race block, if that matters.

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    Senior Member badbug3's Avatar
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    Quote Originally Posted by Ahsumtoy View Post
    Okay, next question. How many stages do I need and where to scavage from? I am using a Dart aluminum race block, if that matters.
    what is your application for the dry sump?

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    Senior Member motormonkey's Avatar
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    Make sure you support the lines and dont let them flop around. That will lead to broken fittings and line abrasion. They will not pull as much vacum as a vacum pump ( the ones Ive played with) so I dont know how much your pulling now. Did you ring the motor with the intention of a vac pump???
    Other than than whats allready been said, really no cons other than cost and room.

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