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Thread: M30 and M50 Injector upgrades

  1. #1
    Join Date
    Aug 2004
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    RTP North Carolina
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    182

    Default M30 and M50 Injector upgrades

    Ok here's the question. What benefits if any to going with new 4 hole style 19Lb injectors over stock? What about new 4 hole style 22Lb injectors? Improved gas mileage? Better idle throttle response? More HP?

  2. #2
    Join Date
    Dec 2003
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    PA
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    5,403

    Default

    You can't just add more fuel to your injection system without necessary air, or tuning. So, no, not more hp, worse throttle response, worse idle.

    M30 guys go to 19# because they're not that much bigger than stock... but 22lb injectors wouldn't be ideal at all.

  3. #3
    Join Date
    Dec 2004
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    Sydney, Australia
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    4,374

    Default

    Quote Originally Posted by Jon K
    You can't just add more fuel to your injection system without necessary air, or tuning. So, no, not more hp, worse throttle response, worse idle.

    M30 guys go to 19# because they're not that much bigger than stock... but 22lb injectors wouldn't be ideal at all.
    19lb Ford replacements flow slightly less than stock BMW. Peeps buy them cos they get 4-holer, save money or think the 19lb is the same or bigger. Its confusing to many as the ratings are always at different pressures let alone different measures . But when u do the math, it works out that the 19lb is a lower flowrate, which I think is why many who report good things are using the larger 3.5Bar FPRs to give them more squirt. nick

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