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Thread: Vacuum pump question

  1. #1

    Vacuum pump question

    Which is better in a bigger cubic inch racing deal... a three vane or a four vane pump, and why?

  2. #2
    I guess I should clarify, 598 cu in....

  3. #3
    Senior Member RACING JUNKIE
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    Depends on the brand your looking at I assume Moroso.
    I 4 vane is for a dry sump situation, but many use them with a relief valve, I run the 3 vane without a relief valve it pulls 8" @ idle and 12 down track.

  4. #4
    Senior Member RACING JUNKIE TheRabbit's Avatar
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    I run a Moroso 3 vane on my 632 with a dry sump and without a relief valve. I've got no idea what it pulls going down the track. I have a hard enough time just going down the track much less trying to look at that little bitty guage :lol: It does pull 12lbs at about 3,000 and above. I don't have a guage in my new truck yet.

  5. #5
    Senior Member RACING JUNKIE curtisreed's Avatar
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    Quote Originally Posted by TheRabbit
    It does pull 12lbs at about 3,000 and above. I don't have a guage in my new truck yet.
    Be careful might suck the valve covers in. :lol: :lol:

    Curtis

    Sorry Rabbit sometimes I just can't resist.

  6. #6
    Senior Member RACING JUNKIE TheRabbit's Avatar
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    Quote Originally Posted by doorracer
    Quote Originally Posted by TheRabbit
    It does pull 12lbs at about 3,000 and above. I don't have a guage in my new truck yet.
    Be careful might suck the valve covers in. :lol: :lol:

    Curtis

    Sorry Rabbit sometimes I just can't resist.
    Don't worry, I've had a lot of those kinda days lately. Most are self induced :shock:

  7. #7
    Quote Originally Posted by Birddog95
    I guess I should clarify, 598 cu in....
    Any idea how well the motor is sealed? More blow by needs more pump.

  8. #8
    Senior Member RACING JUNKIE
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    ???

    Quote Originally Posted by coolbeans
    Quote Originally Posted by Birddog95
    I guess I should clarify, 598 cu in....
    Any idea how well the motor is sealed? More blow by needs more pump.
    MORE BLOW BY,NEEDS a FRESHEN Up!Not a Vac.Pump,these are NOT BANDADES~!

    Later
    G 8)

  9. Racing Junk


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