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  1. #1
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    E46 M3 turbo Injectors and pumps

    Im currently building an E46 M3 Turbo and need a bit of advice on which injectors to use.

    Ive narrowed it down to either Bosch or Injector dynamics..

    From what Ive seen, the Injector dynamics are all high impedance and most of the Bosch (750cc and above) are low impedance.

    What would be the best to use??? and which will fit on the stock rail?

    My target goal is 400 - 500hp for now, so was thinking around an 800cc injector.

    Ive currently got a Bosch 044 inline pump. Do I need to do an intank as well?

    My setup:

    Garrett Gtx3582r
    Bosch 044 inline pump
    Tial 44mm wastegate
    HPF intake mani
    AEM Management

  2. #2
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    first of all.... nice turbo.
    second 800cc should be plenty for your power goals.
    you can always swap out a different intank if you'd like but i don't think its necc for your goals.
    someone more knowledgeable should be chiming in with some actual detail...

    paging PEI to the S54/M54 subforum Click here to enlarge

  3. #3
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    You are doing this yourself? Who is doing your tuning?
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    1 out of 1 members liked this post. Reputation: Yes | No
    Im in South Africa, so Ive got a local tuner to tune the aem for me.

    Turns out the AEM needs high impedance injectors, so probably going to go for the 850cc injector dynamics

  5. #5
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    Click here to enlarge Originally Posted by PotatoHeaD Click here to enlarge
    Im in South Africa, so Ive got a local tuner to tune the aem for me.
    I see, did you get the AEM from HPF or somebody else?
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    1 out of 1 members liked this post. Reputation: Yes | No
    Direct from AEM

  7. #7
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    1 out of 1 members liked this post. Reputation: Yes | No
    Click here to enlarge Originally Posted by PotatoHeaD Click here to enlarge
    Im currently building an E46 M3 Turbo and need a bit of advice on which injectors to use.

    Ive narrowed it down to either Bosch or Injector dynamics..

    From what Ive seen, the Injector dynamics are all high impedance and most of the Bosch (750cc and above) are low impedance.

    What would be the best to use??? and which will fit on the stock rail?

    My target goal is 400 - 500hp for now, so was thinking around an 800cc injector.

    Ive currently got a Bosch 044 inline pump. Do I need to do an intank as well?

    My setup:

    Garrett Gtx3582r
    Bosch 044 inline pump
    Tial 44mm wastegate
    HPF intake mani
    AEM Management
    You've got a lot of good hard parts, but I would sit down with your tuner to talk about the injectors. It's not so much about the flow rate, as the dynamic response. Some tuners are very familiar with certain injectors, and can dial in a car very quickly with them.

    I realize this may confuse a lot of people reading this, but most aftermarket ECUs use a % of duty cycle to map the AFR. You set a maximum pulse width of say 10ms, then the base map is based off of this. The problem with this is that compensations are then based off of the base map, effectively making the total fuel output a percentage multiplied by a percentage. The more compensations, the more "off" a tune can get if the dynamic response of the injector isn't linear or well known.

    Pectel in comparison doesn't need to have the latency (dead time) or maximum pulse width defined, the fuel is mapped directly in ms with compensations tied directly to this.

    My advice is to find out what your tuner wants to use, and go from there.
    Rep Points > Posts since 2010

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    1 out of 1 members liked this post. Reputation: Yes | No
    Well, Spoke to AEM and they say the ecu works best with a high impedance injector. So Im thinking of the Injector Dynamics ID850.

    Also leaning towards only doing the Bosch 044 inline

  9. #9
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    Click here to enlarge Originally Posted by PotatoHeaD Click here to enlarge
    Direct from AEM
    Was unaware this was possible, thought HPF had this for themselves.
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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