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    #1

    BP4W vs VVT

    What is(are) the main difference(s) between the coveted BP4W head and the later VVT head? Is it just the VVT stuff?

    Are the flow and port changes of the 4W head the same as the VVT head or did Mazda change it again on the later one?
    92 Mazda MX3 GS> For sale, $1750 OBO
    94 Escort wagon--BP swap coming, VF10 Turbo, COP, EVO ECU, 03 ZX2 front end conversion
    "Hold yourself accountable before you are held accountable"
    EV14 330cc@3Bar injector kits available.
    EV14 GT500 injector kits available for the BP. 610cc@3Bar.
    EV14 925cc@3Bar injector kits available
    BP Forged H beam rods available now
    KL Forged H beam rods available now
    K8/KF Forged H beam rods awaiting test fit
    FS Forged H beam rods     awaiting test fit
    F2 Forged H beam rods awaiting test fit
    FE3 Forged H beam rods coming soon
    Mitsubishi 3.8 MIVEC rods coming soon
    Aluminum CAS/Distributor caps
    BP oil jet eliminators
    EV14 fuel rail spacers
    More stuff coming soon.......
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    #2
    im pretty sure its still a BP4W casting. the VVT blocks have a higher flow oil pump(obviously) & the valve cover has some weird pieces on it. but the base cast looks the same. VVT oil pressure is fed from the cam gear end cap (there might be an additional hole or so(not sure). i know for sure the head design isn't worse then the BP4W
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    1992- project FE3..... 313 WHP @ 9.3psi



    I pet my dash when I get into the car..."good car"
    he actually has a mazda tree, parts grow on it

    Comment

      #3
      flow design is the same between the two, just VVT added. MS3 can control VVT now as well as DIY has a standalone VVT box so in reality its the better option of the 2
      "Discontent is the first necessity of progress."
      -Thomas A. Edison

      "There is a fine line between ballin' on a budget, and dreamin' on an empty wallet."


      *Junked* 92 mx3, BP swap- milage whore, beaten up and down the east coast
      *Junked* KLZE powered 323 on Megasquirt 1
      172.60HP & 156.93 TQ with only headers and short ram intake. back under the knife for a BPT swap.
      New Daily stock 1.6L 1999 Mazda Protege LX

      Comment

        #4
        Thats kind of what I was thinking, and since I was planning on MS in the future I was curious. Plus the the VVT head is much cheaper and easier to find it seems then the BP4W head.

        I am curious how the VVT head would be with VICS.
        92 Mazda MX3 GS> For sale, $1750 OBO
        94 Escort wagon--BP swap coming, VF10 Turbo, COP, EVO ECU, 03 ZX2 front end conversion
        "Hold yourself accountable before you are held accountable"
        EV14 330cc@3Bar injector kits available.
        EV14 GT500 injector kits available for the BP. 610cc@3Bar.
        EV14 925cc@3Bar injector kits available
        BP Forged H beam rods available now
        KL Forged H beam rods available now
        K8/KF Forged H beam rods awaiting test fit
        FS Forged H beam rods         awaiting test fit
        F2 Forged H beam rods awaiting test fit
        FE3 Forged H beam rods coming soon
        Mitsubishi 3.8 MIVEC rods coming soon
        Aluminum CAS/Distributor caps
        BP oil jet eliminators
        EV14 fuel rail spacers
        More stuff coming soon.......

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