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Thread: Will these injectors fit?

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  1. #1
    Join Date
    Mar 2006
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    Devonport, TAS, Australia
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    35

    Default Will these injectors fit?

    Will these injectors fit my m20b25....if not, what will (want around the 42# mark)

    http://cgi.ebay.com.au/ws/eBayISAPI....MakeTrack=true

    http://cgi.ebay.com.au/INJECTORS-FOR...QQcmdZViewItem

    Thanks.

  2. #2
    Join Date
    Oct 2004
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    Honolulu
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    3,105

    Default Forty Two pounds????

    What are doing to that little M20?

    A stock M20 has something around 15 to 17 in it.


    Vee ave vays of dealing vid your kind...........

  3. #3
    Join Date
    Apr 2006
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    Chicago, Il. U.S.A.
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    Default

    Nothing about 3 bar of boost won't compensate for.
    "The gas pedal wouldn't go to the floor if it weren't meant to be there"

  4. #4
    Join Date
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    PA
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    Default

    I run 42# (440cc) injectors from a Ford SVT Cobra in my 525i. They work fine - bosch part #'s

  5. #5
    Join Date
    Mar 2005
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    Hockinson, Washington
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    2,499

    Default

    Quote Originally Posted by Jon K
    I run 42# (440cc) injectors from a Ford SVT Cobra in my 525i. They work fine - bosch part #'s
    Do you really think thats helpful? Obviously that information will be of no use to him if he isnt running a turbocharger.
    Lowered with blue h&r(?) springs, Bilsteins, tint, 19# design 3 injectors, Dual Magnaflow
    southwest WA

  6. #6
    Join Date
    May 2004
    Location
    Sydney, Australia
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    2,699

    Default

    He is running a turbo.

    Quote Originally Posted by Alexlind123
    Do you really think thats helpful? Obviously that information will be of no use to him if he isnt running a turbocharger.

  7. #7
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    PA
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    Default

    Uh alex, retract your quick response - if my car is running them, his car can run them. Turbo or not. If he wanted to run 42# for an NA car, he could - what do you think a turbo car is when it idles? The only issue with running big injectors is, "Are the injectors too big that the pulsewidth is too low (in millisec) that there is STILL too much fuel entering the motor?" And with 42# injectors, even up to 65# - 72# injectors, that is not the case. So, he IS running a turbo, but that's not even the point. You want an injector you can idle and will support your boost level. A 42# injector will do just that. The minimum pulsewidth duration is ~2.0 to 2.1 ms. If your car is still rich at that PW and requires less fuel, the chance of a high impedence injector closing down to 1.5 - 1.7 ms reliably is not likely without high resolution injection control.
    Last edited by Jon K; 09-14-2006 at 08:34 PM.

  8. #8
    Join Date
    Mar 2006
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    Devonport, TAS, Australia
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    Default

    so will either of those injectors on ebay physically fit into an m20b25?

  9. #9
    Join Date
    Mar 2005
    Location
    Hockinson, Washington
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    Default

    Quote Originally Posted by Jon K
    Uh alex, retract your quick response - if my car is running them, his car can run them. Turbo or not. If he wanted to run 42# for an NA car, he could - what do you think a turbo car is when it idles? The only issue with running big injectors is, "Are the injectors too big that the pulsewidth is too low (in millisec) that there is STILL too much fuel entering the motor?" And with 42# injectors, even up to 65# - 72# injectors, that is not the case. So, he IS running a turbo, but that's not even the point. You want an injector you can idle and will support your boost level. A 42# injector will do just that. The minimum pulsewidth duration is ~2.0 to 2.1 ms. If your car is still rich at that PW and requires less fuel, the chance of a high impedence injector closing down to 1.5 - 1.7 ms reliably is not likely without high resolution injection control.
    I checked his profile and it didnt say anything about a turbo.
    Lowered with blue h&r(?) springs, Bilsteins, tint, 19# design 3 injectors, Dual Magnaflow
    southwest WA

  10. #10
    Join Date
    Mar 2006
    Location
    Devonport, TAS, Australia
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    Default

    Thanks Jon K.

    Sorry Alex, haven't updated profile yet because the conversion isn't 100% complete.

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