Results 1 to 8 of 8

Thread: Injector Dynamics "ID 850" Help!!! Question...

  1. #1
    Lifetime Member GAMEOVER's Avatar
    Join Date
    Aug 2008
    Posts
    1,304

    Question Injector Dynamics "ID 850" Help!!! Question...

    These injectors are 80lb injectors and I knew I had to scale the tune in order to make them work... I took my time and scaled everything that i thought needed to be scaled and did it by 50%.
    And no matter what I did, the motor would flood while cranking!!! The pressure was at 58psi, I had good voltage and spark...new spark plugs and injectors were wired correctly. If I disconnected fuel pump relay, motor would fire right up and idle for 1-2 minutes with no fuel pressure!!!
    I worked on that motor for 6 hours and could not figure out what was happening so I gave up...
    So this morning with a nice big cup of coffee I started to go thru the whole tune and found one really big mistake. I thought I had my units in grams/second and I actually had them in lb's/hour. My question is would this cause massive overflooding even though I accidentally had 6lb injectors in the Tune instead of 40lb injector's???


    HAD---- NEEDED
    6.198--- 49.190000
    6.237--- 49.500000
    6.275--- 49.800000
    6.313--- 50.100000
    6.350--- 50.400000
    6.387--- 50.690000
    6.423--- 50.980000
    6.459--- 51.260000
    6.494--- 51.540000
    6.529--- 51.820000
    6.564--- 52.090000
    6.598--- 52.370000
    6.632--- 52.630000
    6.666--- 52.900000
    6.699--- 53.170000
    6.732--- 53.430000
    6.766--- 53.690000
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

  2. #2
    Senior Member
    Join Date
    Apr 2009
    Posts
    178

    Default

    YES. If the ECU thinks that the injector is only flowing at a rate of 6lb/hr, then it will need that much more on-time in order to deliver the target fuel mass. This new (longer) pulsewidth that accommodates the supposedly low flow rate actually delivers a LOT of fuel when you have ID850's in there...
    ~Greg
    Calibrated Success - EFI Training and Tuning Done Right
    GM Beginner's Guide DVD available now through Summit!
    Engine Management: Advanced Tuning - Amazon's best deal for the EFI crowd.

  3. #3
    Lifetime Member GAMEOVER's Avatar
    Join Date
    Aug 2008
    Posts
    1,304

    Default

    Alrighty, I still can't believe I messed that up...:-D
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

  4. #4
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    You will need to change your oil before running your engine again...

  5. #5
    Lifetime Member swingtan's Avatar
    Join Date
    Jul 2007
    Posts
    1,589

    Default

    BTW, Injector Dynamics have excellent support for EFILive in their data page. They provide an Excel spread sheet with all the required table data to suit their injectors. It makes tuning very easy when you don;t need to guess a lot of the settings.

    Simon,

  6. #6
    Lifetime Member GAMEOVER's Avatar
    Join Date
    Aug 2008
    Posts
    1,304

    Default

    Quote Originally Posted by swingtan View Post
    BTW, Injector Dynamics have excellent support for EFILive in their data page. They provide an Excel spread sheet with all the required table data to suit their injectors. It makes tuning very easy when you don;t need to guess a lot of the settings.

    Simon,
    I agree, it's just that when I copied and pasted the Injector Flow rate from the ID spreadsheet I went directly to the gram's/second column not realizing I had my tune file in lb's/hour....
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

  7. #7
    Lifetime Member GAMEOVER's Avatar
    Join Date
    Aug 2008
    Posts
    1,304

    Default

    If I scaled the tune by 50% and I'm working on my VE table, when I'm doing the copy-paste and multiply, Do I have to do that by 50% also???
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

  8. #8
    Lifetime Member swingtan's Avatar
    Join Date
    Jul 2007
    Posts
    1,589

    Default

    I'm assuming this is for the Auto VE process? If so, then the adjustments should be 1:1. This is because you are referencing MAP and RPM, neither of which have been scaled. You still want to get the VE "correct" for the scaled injector settings, so the correction factor does not change. So a normal paste and multiply process, don't reduce the correction factor.

    Simon

Similar Threads

  1. "File Sys FULL!" followed by "ERROR: $0520"
    By Sushisan in forum AutoCal
    Replies: 2
    Last Post: April 24th, 2012, 05:35 AM
  2. Replies: 3
    Last Post: March 6th, 2011, 01:12 PM
  3. EFILive "Classic"/"Legacy"/"Historic"?
    By emarkay in forum FlashScan V2
    Replies: 6
    Last Post: November 2nd, 2008, 01:48 AM
  4. "PCM is in an Unkown State" & "Reflash Failed"
    By foxySS in forum General (Petrol, Gas, Ethanol)
    Replies: 5
    Last Post: September 8th, 2006, 11:53 AM
  5. Tip/trick For The "big" Injector Guys!
    By nitrorocket in forum General (Petrol, Gas, Ethanol)
    Replies: 1
    Last Post: August 15th, 2006, 01:52 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •