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Thread: E40 injector scaling

  1. #1
    Tuner 5ft24's Avatar
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    E40 injector scaling

    Hi All,
    2006 Pontiac GTO LS2, Just converted to Flex fuel, all looking good, LTFT under 8% from Pump 92 all the way to E-60 so far.
    It has a magnaflow 3" cat back system and Duspeed OTR CAI. as part of preparing to get it tuned when I get the Headers and possibly a cam, I picked up a set of FIC650 injectors.
    I have read the spreadsheet that I was sent with the injector flow data, and all about scaling due to the E40's limits on flow numbers.
    Is there an easy way to do this and NOT miss a table?
    Thanks

  2. #2
    Tuning Addict 5FDP's Avatar
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    I assume your injector table limit is 63.5lb/hr.

    Just double the whole stoich table, half the injector flow rate and half the IVT terms. That is basically all you have to do to scale for the injectors.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Tuner 5ft24's Avatar
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    Here is something odd.
    Followed your instructions.
    Copy/paste the matched table in the spreadsheet for each of the other tables for offsets and small pulsewidth adder.
    When I paste, the values in VCM Editor change and aren't pasted exact. If I manually try to enter the value in the spreadsheet, as soon as I tab or hit enter, it changes to a slightly different number...
    I'm attaching a screenshot I made of the small pulsewidth adder and the spreadsheet values...
    small_adder.jpg

  4. #4
    Tuning Addict 5FDP's Avatar
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    Perfectly normal.

    Nothing is exact because the files don't always allow the numbers you place in there, it will round it off.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  5. #5
    Tuner 5ft24's Avatar
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    cool,
    Thanks

  6. #6
    Tuner 5ft24's Avatar
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    Final question LOL
    Will using this method throw off how the instrument cluster reads MPG etc? and if so, what can I correct to make it read properly?

  7. #7
    Senior Tuner Lakegoat's Avatar
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    Under Fuel--General--Instrument cluster outputs--Fuel density. You can get it close if you play with the numbers and stay e whatever all the time. I switch back and forth, so I just look at the fuel gauge to see how much fuel that I have. MPG is not very important once you start modifying.
    2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
    2013 Silverado 5.3, 6L80k 8.8

  8. #8
    Tuner 5ft24's Avatar
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    FIC 650's are in. fired up first time, let it idle up to normal temp, LTFT's pretty close. went for a drive, little cruising, and a couple wide open blasts to redline. feels good!
    tomorrow the DW300C pump goes in, and the wideband gets installed.
    I saw 0 KR.
    Cut instrument cluster fuel density in half since I did everything else 50%, lb/hr and average MPG for my short drive look to be about normal.
    Attaching tune and log in case anyone is interested.
    Attached Files Attached Files
    2006 Pontiac GTO
    M6
    Flex Fuel enabled
    FIC1000 shorty Injectors
    DW300C Fuel pump
    UPP GTO Auxiliary fuel system
    BoostDistrict LSA Conversion
    BTR Stage 3 PDS Torque cam and kit
    Kooks Longtube headers with High Flow Cat mids
    BoostDistrict LSA CAI with LS7 MAF module
    Mickey Mouse Catch Can
    Hinson 1/2" lowered Engine Mounts
    Magnaflow 3" Cat Back Competition Exhaust
    PLX DM-6 Wideband
    Turbo Technologies Full Flex fuel Tune