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Thread: Let me help you with Injector End Angle.

  1. #91
    Join Date
    Dec 2009


    Agreed, especially 2mm.
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  2. #92


    That's what I wanted to know. It isn't a super critical measurement then, cool.

  3. #93


    In the grand scheme of things, IEA tuning is not super critical. This isn't to say that nice things can't happen when done right. Getting the VE% Table right and the timing right is important. Adding a basic -90° IEA Offset can do nice things for most tunes. Further fidling around and building a table using Allan's spreadsheet can get another level of refinement. All of these IEA changes are cumulatively adding 1-2% overall. Boil that down to one variable (injector placement) for a parameter (IEA) that uses many variables, and you start to see how insignificant 2mm (or even 1inch) becomes. Andrew

  4. #94


    Andrew, I made the changes and now the MAP kPa is 98 and the BARO is ~102 kPa; is that what you wanted to see? Also, can someone make some recommendations on the IEA, or do I need to turn it off, drive around for a while then come back to this thread?
    Attached Files Attached Files

  5. #95


    It's not uncommon for the MAP reading with the engine off to be a few kPa off from the Baro. This is what the Sensor Offset is intended for. Andrew

  6. #96


    Hey guys I'm almost on the cusp of finally starting my new setup. Iron forged 370 LSx, 80mm billet turbo, 4L80E, with 120 lb/hr Holley injectors. I'm running an HP unit for now and I'm wondering if it's worth it to go through IEA tuning? Is the spreadsheet from Snake Eater Performance the one one everyone here has been using to get everything close or is there an update somewhere? Does the Base Fuel Table need to be Learned already or can this be done from a blank state? Thanks for your time guys.

  7. #97


    With a fresh startup, I would just use -90° in the System ICF. You have much bigger fish to fry before you get to the IEA. Andrew

  8. #98


    Yeah, that's kinda what I figured. All the others I've asked about IEA have never even heard of it. Cool man, thanks. One less thing to worry about.

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