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Thread: what mass air to use with a mpx?

  1. #1
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    what mass air to use with a mpx?

    i just bought a 76mm mass air flow sensor for my car and i plan on running a mpx blower with 60lb injectors


    which mass air flow sensor would be the best? with a 76mm work or is it going to be to small?

  2. #2
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    Stock longblock, or do you have heads and cam going on as well? I'm running a 76 C&L with the MPIII, stock engine. You would probably want to go with the larger version if you're doing heads and / or cam too.


    cheers
    Ed N.

  3. #3
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    dave dalke heads package
    mpx blower 25% od
    mp front mount ic
    griffen radiator
    60lb injectors

  4. #4
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    80 or 90 mm

    there is a guy down in houston with a similar set up and he is running with a 80 or 85 mass air.

  5. #5
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    I'm running a 73 mm with an MPx and 50 lbs injectors.

    It really all depends on your application.

  6. #6
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    My built block with 60lb injectors and an MPx was tuned with an 80mm C&L and was not close to pegging it.
    It's only impossible until we do it.

    22-year SC owner - '93 SC AOD (non-locking TC). Same car, same original paint!
    Current setup: 12.550 @ 111.09, 1.917 60ft, no bottle.

  7. #7
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    I have an 80mm....thats what Dave said would work..........on a side note post pics of all these new parts

  8. #8
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    Quote Originally Posted by pablon2 View Post
    My built block with 60lb injectors and an MPx was tuned with an 80mm C&L and was not close to pegging it.
    what kind of power numbers did it put down?


    what are your other mods

  9. #9
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    Quote Originally Posted by TwoToneThunder View Post
    what kind of power numbers did it put down?
    http://www.sccoa.com/forums/attachme...4&d=1195156689

  10. #10
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    To put it this way, the 76 mm C&L MAF with the purple sample tube for 42 lb injectors can flow up to 2000 Kg/h of measurable air based on the stock electronics. In other words, the electronics will be sending a 5 volt signal once you are sucking in 2000 Kg/h of air through that MAF with that sample tube. (This is theory, because alot of things including how the CAI setup is done can alter those limits, and that can go either way.)

    There's an electronic limit as well as a physical limit you need to consider. Alot of folks are surprised how soon they can peg a lightening MAF using its electronics.

    So how much air in Kg/hr can an MPX overdriven at 25% move if the motor can use all that air going into it?

  11. #11
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    Quote Originally Posted by TwoToneThunder View Post
    what kind of power numbers did it put down?


    what are your other mods
    Hmmm, let's see. It jumped off the dyno, then the XXIC split the top weld, and then we ran out of tuning time, AND THEN the thrust bearing went out, so I never got any numbers. Dam, I'm mad all over again.
    It's only impossible until we do it.

    22-year SC owner - '93 SC AOD (non-locking TC). Same car, same original paint!
    Current setup: 12.550 @ 111.09, 1.917 60ft, no bottle.

  12. #12
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    I don't know for sure ,but I am under the impression. That there
    is no sample tube for the C&L 76MM MAF that go's with #60 injectors.

    I thought that C&L had sample tubes to fit up to #50 injectors
    for the 76mm MAF.

    Randy

  13. #13
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    Alot of folks are surprised how soon they can peg a lightening MAF using its electronics.
    Didnt come near pegging it with 318rwhp..We shall see what happens once the AR is thrown on
    They don't call me "SLOWPOKE" for nothin!
    http://www.sccoa.com/forums/garage_v...vehicle&id=110
    Quote Originally Posted by ricardoa1 View Post
    I love the filter. Its pimp. paper element and 10Mircron filtration, 12" long cause size matters.

  14. #14
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    Quote Originally Posted by pablon2 View Post
    Hmmm, let's see. It jumped off the dyno, then the XXIC split the top weld, and then we ran out of tuning time, AND THEN the thrust bearing went out, so I never got any numbers. Dam, I'm mad all over again.

    You blew your motor or is it just that the thrust bearing is kinda shot..Ive noticed the thrust bearing being shot on alot of high mile SC motors that are still running
    Last edited by XxSlowpokexX; 11-21-2007 at 03:20 PM.
    They don't call me "SLOWPOKE" for nothin!
    http://www.sccoa.com/forums/garage_v...vehicle&id=110
    Quote Originally Posted by ricardoa1 View Post
    I love the filter. Its pimp. paper element and 10Mircron filtration, 12" long cause size matters.

  15. #15
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    Quote Originally Posted by TwoToneThunder View Post
    dave dalke heads package
    mpx blower 25% od
    mp front mount ic
    griffen radiator
    60lb injectors
    Just get one that fits in your budget. Start with asking your head provider his recommendation.

    Since you are getting a chip, that will adjust the fuel mapping to MAF voltages. you just want to make sure that your MAF is sized such that it provides a smooth proportional increase of voltage to air flow without hitting 5v before you take the foot off the pedal.

    I believe as far as value is today, the 80mm seems to be the no brainer, unless you are looking used.

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