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IM change affects boost?

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    #1

    IM change affects boost?

    Can a change in your intake manifold result in an increase decrease in available boost?

    Say from being limited to 8 psi...changing IM and now having 12psi?
    Ray
    1992 EX Sedan, Manual
    CB7Tuner Illuminati Member #: 18362

    JGY Honda
    Tags: None
    #2
    sure your old one wasnt crack/leaking/bad gasket? 4psi is a huge increase though

    94 GSR | 93 GSR

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      #3
      It increases your volumetric efficiency(if going with a better one), which will cause your turbo to spool up sooner and have the ability to produce more boost.

      Unless you do not have a wastegate and your motor ran COMPLETELY like shit, the chances a manifold change caused your boost to raise 4psi is unlikely.

      Sounds like what you did was change your vacuum source to your wastegate and or your boost gauge. That does make a huge difference.

      CrzyTuning now offering port services

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        #4
        A buddy of mine has a car that was not getting any more than 20 psi. He installed a 120 wet shot kit, and a new aftermarket IM ... during his initial dyno pull with the new setup, he shows 27 psi W/OUT even using the NOS...

        I'm not too familiar with forced induction yet, so I'm curious to know how that could happen.
        Ray
        1992 EX Sedan, Manual
        CB7Tuner Illuminati Member #: 18362

        JGY Honda

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          #5
          he could have altered the boost controller.

          CrzyTuning now offering port services

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            #6
            his boost guage could be off...

            boost in a honda vs boost in a dsm, has showed me in a honda 4psi is alot, in a dsm, 4 psi, is barely noticable.
            "Self Renewed"

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              #7
              Okay...so there are a few factors that could be involved, I guess.

              I had no idea that it would make a difference, but we're talking about a Nissan SR20DET with much work done to it...
              Ray
              1992 EX Sedan, Manual
              CB7Tuner Illuminati Member #: 18362

              JGY Honda

              Comment

                #8
                Very significant detail being a completely different engine. What IM have you changed it to?


                Car Safety / General Servicing Checks --------Basic suspension checks

                My 5.7 LS1 Holden Ute

                A "Finished" project car is never finished until its been sold.

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