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    Thread: REFERENCE: Fuel Injectors for 1.8t

    1. Moderator groggory's Avatar
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      07-19-2010 01:46 PM #1
      I am going to start compiling all the fuel injector info for our cars into one thread. Bear with me and please chime in with any missing information, corrections to misinformation, comments, or suggestions.

      Also, at the trailing end of this thread I will be posting questions that need answering. Please answer those in the name of completeness.

      Thanks!

      Note. This is a supplementary thread to my thread REFERENCE: Fueling FAQ. This thread will only contain information about injectors. I will post another thread in the future regarding all known injector/ MAF/ turbo/ engine size/ compression stock tunes for the 1.8t (or 2.0t stroked).

      ---------

      FAQ
      • Convert cubic centimeters <--> pounds per hour
        cc * 10.5 = pph
        cc = pph / 10.5
      • Excellent reference documents on many types of injectors
      • Injector height (Middle of o-ring -> middle of o-ring)
        ..insert a picture diagramming this measurement...
      • Stock Injectors on VAG cars
        USRT Reference Table
      • Injector Cleaning/ Testing
      • Choosing injector sizing based on your power goals
        Reference BobQ's thread on this subject
      • Injector Resistance
      • MAF Sizing
        Many software tunes will require a larger MAF in order for their software to run well. For BT applications, the stock intake is either restrictive or the MAF will not read a high enough number to allow the software to run properly.

        When upgrading the MAF you will also have to upgrade your TIP (turbo intake pipe).

        If you do not want to upgrade this talk to your tuner about a MAF'less file. The ECU will be able to read the MAF (for logging/ diagnosis purposes) but it does not factor it into any calculations. You could very well attach a filter straight to the turbo inlet and call it a day if you run this sort of file.

        • Standard 1.8t - 2.5"
        • S3/LCR/TT225/VR6 - 2.75" (People refer to this as a 3" even though the ID is 2.75")
      • Injector Flow Matching
        Testing the actual flow of each injector and then bundling groups of injectors together that have a very similar flow number. This will allow a car to operate most efficiently by allowing each cylinder to act most similar to each other cylinder
      • Dirty Injectors
        Dirty injectors will spray less fuel (causing a lean condition) and spray it using a non-optimal spray pattern resulting in less efficient (read lower gas mileage and lower power output) combustion.

        Example of dirty and clean injectors
      • Types of spray patterns
        Quote Originally Posted by USRT
        Factory engineers have gone to great lengths to make sure that fuel is injected in the correct spray pattern for each cylinder head design. Meanwhile, tuners have put up with cold start problems, lumpy idles, misfires and other problems for years. A major reason for this is injectors that are mismatched to the application.


        The picture [above] shows a 16v inlet port in detail. A central bridge is clearly visible. This is where the main inlet port becomes split to direct air (and fuel) towards the intake valves. The correct injector type for this inlet configuration is one where the injector nozzle sprays precisely-split fuel streams directly into each port and onto the back of each inlet valve.

        Contact with the metal walls is carefully avoided. An injector that sprays a single-narrow fuel cone will wash down the manifold and head. Tuning/holding precise air/fuel ratios is thusly complicated because fuel puddles and then slowly dribbles into the combustion chamber. So much for EFI precision!

        Crossflow 8v and VR6 12v are more easily taken care of with conventional injectors. Fuel is atomized after impact with the valve itself or, better yet, directly at the injector tip.
        Single Cone
        Wide
        Dual Cone
      • Types of injector clips
        * ND (Nippon Denso)

        * USCAR / Bosch EV6
        Example cars with this: LS2/LS7 motors and late model Ford motors


        * USCAR2 connector
        Found on Genesis 430cc and Genesis 550cc injectors
        * Jetronic / Bosch EV1 / Minitimer connector
        Commonly found on Bosch, Siemens injectors
        This is the connector found on our stock spark plugs and our fuel injector harness.



      • Injector Impedance
        Injectors are just electric solenoids. They are normally closed when no voltage is present. When you put a voltage across the coil it opens the solenoid thus allowing your pressurized fuel in the fuel rail to 'squirt' into your engine (in the case of the 1.8t, into the intake runner where it is mixed with the air before entering the cylinder).

        Quote Originally Posted by USRT
        It is also important to understand that fuel injectors come in two electrical flavors -high and low-impedance. VW ECUs require high-impedance but many standalone systems are equipped to manage the lows. The primary advantage of low-impedance injectors is their faster response time. (That is, the speed at which they can be turned on/off.) When very large injectors (e.g. >580cc) are fitted, low-impedance injectors are much easier to tune for proper idle quality and for use at extremely high rpms. The primary advantage of high-impedance injectors is the fact that less heat is generated in the drive circuit and thusly less complex/expensive circuitry is required. Again, if you have a VW ECU you absolutely must use high-impedance parts.

        Before I delve into whether an injector is high impedance or low impedance, it is useful to actually know what impedance is first.

        Impedance (in the case of injectors) is the combination of an inductor's reactance and resistance.

        Resistance (R) and Reactance(X) are measured in ohms (omega)
        Inductance (L) is measured in Henry's (H)
        Impedance (Z) is measured in ohms (omega)
        Frequency (f) is measured in Hertz (Hz)

        Inductance and Resistance can be easily measured by a measuring device. However, Reactance is a function of frequency as such:
        X(L) = 2fL. That is why the manufacturers list injectors as just 'high Z' or 'low Z'. If your ECU is pulsing your injectors at a fast rate, the frequency will be high. If the ECU is pulsing the injectors at a low rate, the frequency will be low.

        Thus, let's put these ideas into the impedance formula:


        And you can see that injectors can be many combinations of resistance and inductance in order to be classified as High Z or Low Z injectors. Each mfg can do it their own way.

        After all is said and done though the ECU needs to be able to drive the injectors. The ECU doesn't directly care if an injector is High or low Z. They both run off the same 12V circuit...but they will act as if they have different resistances, and thus draw different currents.

        Ohm's Law
        V=IR -> I=V/R
        voltage = current * resistance

        P = IV -> P = I^2 * R
        Power = Current * Resistance

        Example (High Z Injector)

        12V circuit.
        High Z Injector (@1000 Hz cycle rate) = 10 ohm
        I=V/R -> I=12/10 = 1.2A
        P=IV -> P=1.2 * 12 = 14.4W

        Example 2 (Low Z Injector)

        12V circuit.
        Low Z Injector (@1000 Hz cycle rate) = 2 ohm
        I=V/R -> I=12/2 = 6A
        P=IV -> P=6 * 12 = 72W

        That means that if you were to hook a high Z injector up to the ECU the ECU needs to use 14.4W to switch. If you do the same with a low Z it needs to use 72W!!! Way too much power. That is where the idea of a resistor box comes in....

        A resistor box adds a resistor in series with each of the injectors. It is called a resistor 'box' because each box has a row of resistors all packaged up and heat sinked for ease of installation. If we add a resistor box in series with out low Z injectors our 'R' in the equation becomes R(resistor box) + Z (injector) = R
        If the resistor box were to use 8 ohm resistors then the low Z injectors will appear to the ECU the same as the high Z injectors.
      • Injector Height
      • Injector O-Ring Size


      Recommended Injector Service Companies
      • Witch Hunter
        - Fuel Injector Cleaning, Flow Matching, Testing
      • Racetronix
        - Purchase flow matched injectors at a good price
        - Excellent spec list for each injector sold


      Stan Weiss Injector list w/ specs
      ----------
      Note: APR Stg3/ 3+ software changed their injector size many times. Early software used >630cc Bosch injectors. Later software used ~380cc Bosch injectors. Call APR and work with them to figure out what size you need. Or send what you have to a flow testing shop to figure out what you already have in hand. The APR promotional video mentions they use 550cc injectors. So who knows.

      Note: I am not including software that runs on stock injector/ engine configurations. There are a ton of them and you don't really need any of this fancy fueling stuff to accomplish goals with that sort of software

      Note: For most every BT software you should be running 2.5"-3" downpipe and exhaust. Don't run a BT and a stock 2-2.25" exhaust! You should also run upgraded intercooler, appropriately sized fuel pump, and high performance intake.

      Note: When fueling over 1200cc it is recommended to run -6AN from the fuel tank forward. You may run into fuel starvation with the stock fuel lines. This is according to user DonSupreme as guided by MikeZ @ Unitronic

      Good read: CONTROVERSY - Injector Dynamics vs. EFI Wizzard/Wizard featuring Ed@Forcefed

      Five-O Motorsports Custom Milled and matched injectors

      Injectors
      Note: Rated flow is at 3bar unless otherwise noted. 3Bar is the standard pressure Bosch rates their injectors at.

      250cc/ 24lb
      • Bosch
        Model #
        Compatible fuels:
        High Z
        Medium Angle Single Spray Cone Pattern
        ?? injector clip
        ?? o-ring center->center

        $39 @ USRT


      315cc/ 30lb
      Stock Injectors on AWD, AWW, AWP, AWV Engine Codes

      * Gonzo Stage II

      • Bosch
        Model #
        Compatible fuels:
        High Z
        ??? Spray Pattern
        ev1 injector clip
        63mm o-ring center->center



        $35 @ Integrated Engineering
        $44 @ USRT
      • Genesis
        Model #
        Compatible fuels:
        High Z
        Dual cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        $50 @ USRT


      330cc/ __ lb

      Genesis II

      380cc/ 36lb
      Unitronic 380cc on K04 @ 3BAR w/ 3" MAF
      GIAC 380cc @ ???BAR on K03 or K04 w/ ????
      Note: You can run the APR K04 program @ 3BAR on this injector, but it is not officially APR endorsed. Just a common forum suggestion


      This is the Audi TT225 injector sizing
      • Bosch 'White Giant'
        Model #
        Compatible fuels:
        High Z
        ??? Spray Pattern
        ev1 injector clip
        63mm o-ring center->center
        Video


        $55 @ Integrated Engineering
        $50 @ CTS Turbo
      • Siemens
        Model #
        Compatible fuels:
        ??? Z
        ??? Spray Pattern
        ?? injector clip
        ?? o-ring center->center

        Video
      • Genesis
        Model #
        Compatible fuels:
        High Z
        Dual Spray Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center
        Video

        Video
        $69 @ USRT


      415cc/ 39lb
      Unitronic 415cc @ 3.5 bar on GT28xx w/ 3" MAF

      Can be used at 3.5BAR for compatibility with 440cc@3BAR software

      • Genesis
        Model #
        Compatible fuels:
        High Z
        Dual Spray Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        $75 @ USRT




      430cc/ 41lb
      • Bosch
        Model # 0 280 156 012
        Compatible fuels:
        ?? Z (12 ohms resistance)
        ??? Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        $ ???
      • Genesis
        Model #
        Compatible fuels:
        ?? Z
        Dual cone Spray Pattern
        USCAR2 injector clip
        ??? o-ring center->center

        $ 69 @ USRT


      440cc/ 42lb
      Unitronic 440cc @ 3 bar on GT28xx w/ 3" MAF


      Gonzo Stage 3 @ 3 bar on hybrid turbo w/ TT225 "3 inch" MAF Housing (Keep Stock Sensor)

      • Delphi
        Model #
        Compatible fuels:
        Low Z
        Single Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        $46 @ Integrated Engineering
        $50 @ USRT
      • Bosch 'Green Giant'/ 'Green Top'
        Bosch Green Top Video
        Note: Green Tops were the first version of the 430cc injector that bosch made. Around 2002 lots of tuners were having a hard time making files for the so called, 'green tops.' The Green Tops had the wrong flow pattern for our 20V engines.
        However, later, Bosch came out with the 'green giants.' The Green Giants flowed the same but they had the proper flow pattern for our engines. This is the injector you should go with if you have need of a 430cc injector for the 20V platform.
        Model #
        Compatible fuels:
        High Z
        Wide Spray Pattern
        ??? injector clip
        ???mm o-ring center->center
        Video

        $50 @ Integrated Engineering
        $40 @ CTS Turbo


      525cc/ 50lb
      • Delphi
        Model #
        Compatible fuels:
        Low Z
        ??? Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        $80 @ Integrated Engineering


      500cc/ lb

      Genesis II


      550cc/ 52lb
      Unitronic 550cc @ 4 BAR on GT28xx w/ 3" MAF
      Revo 550cc @ 3BAR on GT28R or GT28RS or GT2871R w/ 2.75" MAF
      • Bosch
        Model #
        Compatible fuels:
        High Z
        Wide Spray Pattern
        ??? injector clip
        ??? o-ring center->center


        $50 @ Integrated Engineering
        $50 @ CTS Turbo
      • Genesis
        Model #
        Compatible fuels:
        High Z
        Dual Spray Cones Pattern
        ??? injector clip
        ??? o-ring center->center

        $75 @ Integrated Engineering



      630cc/ 60lb
      Unitronic 630cc @ 3 BAR on GT28xx or GT3xx w/ 3" MAF
      Eurodyne 630cc @ 3 BAR on GT28xx or GT3xx w/ 2.5" MAF


      Gonzo Stage 4 , 3 bar on BIG TURBO. GT28 to PTE6262 series or similar, TT225 "3 inch" MAF Housing (Keep Stock Sensor)

      • Genesis II
      • Siemens
        Model #
        Compatible fuels:
        High Z
        Dual Spray Cones Pattern
        ??? injector clip
        ??? o-ring center->center


        $50 @ CTS Turbo

      [/COLOR]

      650cc/ 60lb

      [list][*]EFI Wizard
      Model #
      Compatible fuels:compatible with the additive MTBE
      High Z
      Wide Spray Cone Pattern
      ??? injector clip
      ??? o-ring center->center

      Quote Originally Posted by tstarkz123
      you will need the injector, 12.5mm extender with 14mm orings, and a Sumitomo (Denso) electrical connector pigtail or Denso female to EV1/Jettronic male adapter


      725cc/ 69lb
      • Injector Dynamics
        Model # ID725
        Compatible fuels:
        ??? Z
        Single Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center


      750cc/ 69lb
      • EFI Wizard
        Model #
        Compatible fuels:compatible with the additive MTBE
        High Z
        Wide Spray Cone Pattern
        ??? injector clip
        ??? o-ring center->center


      Quote Originally Posted by tstarkz123
      you will need the injector, 12.5mm extender with 14mm orings, and a Sumitomo (Denso) electrical connector pigtail or Denso female to EV1/Jettronic male adapter


      780cc/ 75lb

      • Delphi
        Model #
        Compatible fuels:
        Low Z
        Single Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        $85 @ Integrated Engineering


      830cc/ 79lb
      Unitronic 830cc @ 3 BAR on GT28xx or GT3xx w/ 3" MAF
      • Delphi
        Model #
        Compatible fuels:
        High Z
        ??? Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        * Run by groggory on GT2871 + Uni. No problems.
        $65 @ Integrated Engineering


      870cc/ 85lb
      Eurodyne 870cc @ 3 BAR on GT28xx or GT3xx w/ 2.5" MAF

      • Siemens 870 Deka
        High Z
        Quote Originally Posted by pete@integrated
        The Deka 870's idle awesome, on standalone, and I've gotten them to work just fine on Maestro too... Have not played with the uni file, but when it's non adjustable, using injectors other then what the file was written for is just asking for trouble. So is putting a maf onto a car that probably leaks boost / vacuum like a sieve.

        $59.99 @ Integrated Engineering

      880cc/ 85lb[*]Delphi
      Model #
      Compatible fuels:
      Low Z
      Single Cone Spray Pattern
      ??? injector clip
      ??? o-ring center->center

      $85 @ Integrated Engineering


      1000cc/ 95lb
      Eurodyne 1000cc @ 3 BAR on GT28xx or GT3xx w/ 2.5" MAF

      • Injector Dynamics
        Model # ID1000
        Compatible fuels:
        ??? Z
        Single Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center
      • Genesis II
      • EFI Wizard
        Model #
        Compatible fuels:compatible with the additive MTBE
        High Z
        Wide Spray Cone Pattern
        ??? injector clip
        ??? o-ring center->center

        Quote Originally Posted by tstarkz123
        you will need the injector, 12.5mm extender with 14mm orings, and a Sumitomo (Denso) electrical connector pigtail or Denso female to EV1/Jettronic male adapter
      • Delphi
        Model #
        Compatible fuels:
        Low Z
        Single Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        $85 @ Integrated Engineering
      Last edited by groggory; 04-15-2013 at 06:59 PM.

    2. Moderator groggory's Avatar
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      07-19-2010 01:47 PM #2
      1260cc/ 120lb
      Unitronic 1200cc @ ??? BAR on GT40xx w/ ???" MAF, EBC/MBC, and driver box (from SEM motorsports)

      • Lucas/ RC
        Model #
        Compatible fuels:
        Low Z
        Single Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        $60 @ Integrated Engineering


      1600cc/ 152lb
      • Bosch
      • Genesis II


      1680cc/ 160lb

      2000cc/ 190lb
      • Genesis II
      • Injector Dynamics
        Model # ID2000
        Compatible fuels:
        ??? Z
        Single Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center

        Quote Originally Posted by tstarkz123
        you will need the injector, 12.5mm extender with 14mm orings, and a Sumitomo (Denso) electrical connector pigtail or Denso female to EV1/Jettronic male adapter
      • EFI Wizzards
        Model # 7-10-09-09-122402 / 0280158117
        Compatible fuels: compatible with the additive MTBE (VP's q16 and VP's Import blend)
        High Z
        Single Cone Spray Pattern
        ??? injector clip
        ??? o-ring center->center


        $225 @ Force Fed Engineering

        Quote Originally Posted by tstarkz123
        you will need the injector, 12.5mm extender with 14mm orings, and a Sumitomo (Denso) electrical connector pigtail or Denso female to EV1/Jettronic male adapter


      Tools
      ..need to add stuff

      Adapters
      • USCAR2 injector -> Jettronic car clip

        $11.25 @ USRT
      • 1.8t spacers
        Quote Originally Posted by USRT
        Fuel rail spacers required for all 1.8T engines except for AEB code. Please contact us with any questions regarding fitment. Genesis injectors do not require spacers except where noted.

        $10 @ USRT


      Misc

      Fuel Injector Spare Parts
      Last edited by groggory; 04-15-2013 at 06:46 PM.

    3. Moderator groggory's Avatar
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      07-19-2010 01:47 PM #3
      Spray Patterns



      Comparisons/ Educational
      Early gen Bosch vs. Gen3 Bosch
      Lucas discs to Gen3 Bosch
      Injectors in Slow Motion
      High speed camera of working 2 valve/cylinder engine --VERY COOL!!!
      Last edited by groggory; 07-19-2010 at 05:57 PM.

    4. Moderator groggory's Avatar
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      07-19-2010 01:47 PM #4
      ....Post4....

    5. Moderator groggory's Avatar
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      07-19-2010 01:47 PM #5
      ...Post5...

    6. Moderator groggory's Avatar
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      07-19-2010 05:44 PM #6
      ...post5

    7. Moderator groggory's Avatar
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      07-19-2010 06:03 PM #7
      What do you guys think so far? Anything major I need to add?

    8. 07-19-2010 06:28 PM #8
      Question: Are you saying our cars are Jetronic connectors? I thought we were EV1? I could be wrong. Good start though!

    9. Moderator groggory's Avatar
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      07-19-2010 06:50 PM #9
      Quote Originally Posted by TSTARKZ123 View Post
      Question: Are you saying our cars are Jetronic connectors? I thought we were EV1? I could be wrong. Good start though!
      I believe Bosch EV1 is the same as a generic Jettronic connector.

      I believe EV1 is a bosch injector form factor, not a specific connector. When you say EV1 connector, you mean the connector found on a bosch EV1 form factor injector...aka a jetronic connector in general speak.

      For instance, bosch also has EV6 and EV14 injectors that still use the Jet plug
      http://www.mksautobusiness.fi/page_injectors.html

      Feel free to keep bringing up more information, clarifications, and mistakes. This FAQ is no good if it's filled with misinformation.

      Thanks!

    10. Moderator groggory's Avatar
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      07-19-2010 07:27 PM #10
      What's the difference between the bosch green top and the bosch green giant

      As referenced in this thread
      http://forums.vwvortex.com/showthrea...-CTS-Turbo-***

    11. Moderator groggory's Avatar
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      07-20-2010 01:48 PM #11
      bump. Help me fill in the blanks people.

      For those of you who have been throwing me PMs with additional information...Thank you.

    12. Member 18T_BT's Avatar
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      07-27-2010 04:24 PM #12
      Quote Originally Posted by groggory View Post
      What's the difference between the bosch green top and the bosch green giant

      As referenced in this thread
      http://forums.vwvortex.com/showthrea...-CTS-Turbo-***
      they discontinued the green tops and replaced them with the green giants

    13. 07-27-2010 05:10 PM #13
      FYI: If you're looking to run any of the large 2000cc injectors ie EfiWizards or ID2200s you will need the injector, 12.5mm extender with 14mm orings, and a Sumitomo (Denso) electrical connector pigtail or Denso female to EV1/Jettronic male adapter.

    14. Member bootymac's Avatar
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      09-12-2010 05:45 PM #14
      Good thread! I came across something about the TT225 injectors and I was hoping someone could clarify the differences between the white injectors from the BEA (0 280 156 063) vs. blue injectors from the AMU (0 280 155 892).

      I read that the spray pattern is the only difference. If so, which one is preferable?

    15. Member saps's Avatar
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      09-12-2010 06:50 PM #15
      very cool and informational thread, definitely FAQ material. Thanks man!

    16. Moderator groggory's Avatar
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      09-13-2010 01:18 PM #16
      Quote Originally Posted by bootymac View Post
      Good thread! I came across something about the TT225 injectors and I was hoping someone could clarify the differences between the white injectors from the BEA (0 280 156 063) vs. blue injectors from the AMU (0 280 155 892).

      I read that the spray pattern is the only difference. If so, which one is preferable?
      According to this thread...
      http://www.passatworld.com/forums/ar.../t-237442.html

      the 0 280 156 063 is the EV6 type.

      According to USRT's post
      http://www.usrallyteam.com/content/t...injectors.html

      the 0 280 155 892 is of the EV12 type.

      So I think that would be your main difference.

    17. Moderator groggory's Avatar
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      04-28-2011 02:21 AM #17
      Updated to list updated details on the green top vs. green giant issue.
      My Build
      My FAQ / DIY Thread -- Look here for 90% of the questions you have

      Welcome to the world of racing! Budgets are ALWAYS exceeded, deadlines are never meet, end-goals never reached, and wives always unhappy... it's all worth it though!

    18. Member Issam Abed's Avatar
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      04-28-2011 02:54 AM #18
      Always love wholesome technical threads.

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      04-28-2011 07:38 AM #19
      Another freakin beautiful thread from groggory! Well done!

    20. Moderator groggory's Avatar
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      06-08-2011 10:34 PM #20
      Does anyone know what maf/injector combo that malone tuning supports out of the box? I'll update the injector list to also include malone tuning.

      Thanks.
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    21. Moderator groggory's Avatar
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      06-13-2011 12:31 PM #21
      ^^ Bump for updates to include 870cc Siemens Deka injectors

      ...also, does anyone have the info I asked about the Malone Tuning tunes?

      Also, I've been trying to have tunes and injectors cross referenced. Could people chime in and add in knowledge of what injectors seem to work BEST for a given tune? I'll add in your advice to the injector listings.
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    22. 10-07-2012 12:48 PM #22
      Quote Originally Posted by groggory View Post
      ^^ Bump for updates to include 870cc Siemens Deka injectors

      ...also, does anyone have the info I asked about the Malone Tuning tunes?

      Also, I've been trying to have tunes and injectors cross referenced. Could people chime in and add in knowledge of what injectors seem to work BEST for a given tune? I'll add in your advice to the injector listings.
      Will have an update for you on EV14 750cc and Gonzo tune StageIII/E85 file.

    23. Moderator groggory's Avatar
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      04-15-2013 06:47 PM #23
      Corrections per Scott@USRT

      Point of correction...
      re: the electrical connectors...
      The Bosch EV6 is an injector type and not a connector type.
      USCAR is the connector
      Bosch EV1 is the injector type and not the connector type.
      The connector used on all EV1 is Jetronic aka Minitimer
      EV6 often use Jetronic/Minitimer but also often use USCAR
      Bosch EV14 come in Jetronic/USCAR/Denso
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    24. 04-15-2013 09:10 PM #24
      Sub'd for nerdy goodness
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    25. 08-10-2013 05:05 PM #25
      The calculation for Power is incorrect for this application, you are assuming DC source.
      Injector resistance and source voltage are not sufficient to calculate power.
      What is still missing is the inductance of the coil, frequency (related to RPM), and duty cycle.
      The inductance of the coil can be measured using an LCR meter but that wont yield accurate calculation either. the injector is an elctro-mechanical device, the force induced by the coil to move the injector plunger that is spring loaded will effectively add load resistance.
      I am not an injector specialist, meaning that I cannot confirm to you whether the specified inductor resistance does include the mechanical load or not, but these can be measured.
      Back to the calculation, if the inductance is very high, one can ignore its effect at some or all frequencies, only then you can simplify I=V/R*sqrt(D), therefore power P=V^2/R*D.
      Hope this helps. Adding resistors and or resistor boxes is not the right way of doing things (even if other people do it for lack or better resources). The added resistor will limit the current into the coil, and will slow the turn on time and the resulting programmed duty cycle. For better control of fuel injection windows it is better to have as fast as possible turn on time and turn off time so you can selectively inject the fuel at the most optima time.
      Note that some high impedance injectors can be driven momentarily at much higher voltage to "snap" them ON...
      Hope this helps

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