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Thread: Gtr exhaust manifold upgrade

  1. #16
    suspension mods intheworks FE3-323's Avatar
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    Mohd SJ

    he produces the tubular manifolds you're looking for.
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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


  2. #17
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    That's great thanks, my mate found him he seemingly ships them all over the world. Think I'll stick with mazda's version for now.

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    You don't happen to have the part no for the dw's 650's do you please?

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    I've found deutschwerks 700cc's for Miata 90-05 part no 22s-00-0700-4 would these drop in fit please?

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    sharing what I'm learning 😀 Nzefi: "Your stock GTR injectors should be a low impedance full length injector with 11mm top o-ring seal, 16mm lower seal and a Denso 'high tag' connector. I believe these flow around 440cc/min.

    Miata injectors are the same form factor, but are high impedance and flow less than a stock GTR injector.

    How much power are you aiming for? For an upgrade, something like these high impedance Bosch EV14 720cc/min injectors with an 11mm top adapter and 16mm lower seal could be worth considering:

    http://www.nzefi.com/product/bosch-7...fuel-injector/

    Note that the factory ballast resistor pack will need to be removed and bypassed. The fuel rail may also need to be spaced up a couple of millimeters as they work out slightly long than the stock injectors."

    Remove resistor and join wires together. Sorted and in post
    Last edited by Stoj; 03-05-2017 at 06:56 PM.

  6. #21
    Likes AWD a bit too much jay's Avatar
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    It's quite important to match impedance unless you like to play with unneeded headaches. 550-650 should be plenty. 720's may be asking for idle issues.
    '90 AWD Protege, full GTR drivetrain swap, ~320 whp daily driver, RIP, and
    '90 AWD Protege, yet another GTR swap, Open class rallycar with a Toyota GT4 gearbox swap, thus crossing the line between hobby and mental illness. And a Brabus E55 K8, removing all doubt.
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    It is all a bit experimental I agree, ended up ordering them I'll update once fitted and remapped. Had an email back from Chris @ Deutschwerks he said : 'If that is the case, that is the first Denso injector in that form factor that is low-impedance that Iíve come across.' And : 'The FC RX7 switched to high-impedance injectors in 1989. They look similar to the Familia GTR injectors, too.' So bit of luck all will be well as they come high impedance.

  8. #23
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    Plus I saw Subaru injectors that were 800cc 😈😈😈😂😂😂 they guys get parts so easy , they deserve to get beaten by a wee Mazda every now and then 😂 I'm on the case lol

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