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lt1 oil pump

This is a discussion on lt1 oil pump within the LT1 forums, part of the Vehicle Specific category; im doing le 2 build and droping motor and trans while cleaning things up cold oil pressure is 40 psi ...

  1. #1
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    lt1 oil pump

    im doing le 2 build and droping motor and trans while cleaning things up cold oil pressure is 40 psi and about 20 warmed up all day should i put a melling hp hv pump in or std volume hp or leave it alone im not trying to go to crazy because afer 2010 im gonna 396 supercharge build

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    Senior Member 5.0THIS's Avatar
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    Just put in a stock replacement pump then and you should be fine.

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    Senior Member JaycenK's Avatar
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    +1

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    DO NOT get a HV pump. The short block that I bought for my car had a HV pump in it and I didn't even think about it. I put my stock pan on it and dropped it in. Big mistake. to make a long story short, it sucked the pan dry and filled the heads full of oil, tore up the crank. I just got the motor back in this past week.

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    so what mellin pump number stock volume high pressure with screen

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    i was told to use m155 melling stock replacement 33$ i was looking for stock volume high pressure i will call gm dealer and see there prices arnt lt1 and sbc the same pump just diffrent pickups

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    Senior Member JaycenK's Avatar
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    M55 stock pressure stock volume. M155 stock pressure stock volume. You do not need a high pressure pump to blow out of seals. The m155 came in my stroker kit. I ended up having to buy an m55 to work with a moroso oil pan and moroso pickup. The m155 uses a 3/4 pickup tube inlet and the m55 uses a 5/8 pickup tube inlet I think the stock pickup tube is a 3/4 so you could go with the m155. If you decide to go with another pickup and need a 5/8 inlet on the pump, use the m55

  8. #8
    There are a couple versions of the Melling pump. I believe a Melling Select has a more robust hosing.

    Always braize the pickup tube to the pump.

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    Senior Member 5.0THIS's Avatar
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    Quote Originally Posted by mitchntx View Post
    There are a couple versions of the Melling pump. I believe a Melling Select has a more robust hosing.

    Always braize the pickup tube to the pump.


    Agreed, bolt or not.

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    Senior Member JaycenK's Avatar
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    Quote Originally Posted by 5.0THIS View Post
    Agreed, bolt or not.
    Why if it has a bolt? Is it Because of possible air syphen?

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    Senior Member 5.0THIS's Avatar
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    Quote Originally Posted by JaycenK View Post
    Why if it has a bolt? Is it Because of possible air syphen?


    Many years ago in one of our racing engines we had one of those bolt tabs break, or come loose. I forget which. When you lose a pickup, bad things happen. Braizing the pickup on is quick, easy, and good insurance.

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    Senior Member JaycenK's Avatar
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    Ah gotcha

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