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  1. Sticky: ...

    ...
  2. I agree. I guess I was trying to explain what it...

    I agree. I guess I was trying to explain what it sounded like. It sounds exactly like knock, but has never showed any knock with knock sensors running stock parameters.



    I've tuned dozens of...
  3. I thought that too, but I'm pretty sure it isn't...

    I thought that too, but I'm pretty sure it isn't in the exhaust. Hell, I wanted it to be in the exhaust. I tried to convince myself it was in the exhaust, but the more I listened to it I could tell...
  4. Odd noise driving me crazy. Possibly tune related? Injectors?

    My specs are in my sig below. I drive my car with the top down 99% of the time, so the only time I hear this noise is when the top is up. It sounds just like valve chatter/rattle from running low...
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    Yes, they are scaled. The Spark Histogram...

    Yes, they are scaled.


    The Spark Histogram is reading correct. The Table Display is incorrect and the ECM is using this Airmass reading when looking at the Spark Tables.
    Thanks Russ, I'll try...
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    Spark table help with scaled tune

    I changed my LS2 heads out for some ported/polished LSA heads so I'm doing some re-tuning. Specs are in my sig. I'm running OLSD with a 50% scaled tune.

    I noticed when giving 40%-60% throttle in a...
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    Lambda it is then. Thanks a lot Dave.

    Lambda it is then. Thanks a lot Dave.
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    "double stoich, halve IFR" scale question

    I'm working on an 08 Z06 with a Vortech. I scaled the tune using the "double stoich, halve IFR" method. Now my commanded AFR is double what it should be. What do I need to do to get the commanded to...
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    Standard atmospheric pressure is 14.7, not 14.5...

    Standard atmospheric pressure is 14.7, not 14.5 and it is only 14.7 at sea level. The most accurate solution I have found is to use the barometric pressure PID. This way, your boost reading will...
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    1 bar enhanced OS question.

    I have a buddy with a shop that is just learning HP Tuners. I have been helping him via telephone. He was tuning an older BMW race car with a built LS3 running a 2005 Cadillac CTS-V VCM, Corvette TAC...
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    http://www.gmtuners.com/flow/index.htm About...

    http://www.gmtuners.com/flow/index.htm

    About 3/4 of the way down. You should be able to find a tune with proper numbers in the repository.
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    http://i160.photobucket.com/albums/t170/2000c-5/E6...

    http://i160.photobucket.com/albums/t170/2000c-5/E67E40E38marked.jpg
  13. This may help. ...

    This may help.

    http://forums.corvetteforum.com/c5-scan-and-tune/1705471-connecting-wideband-via-egr-or-a-c-pressure-in-hp-tuners.html
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    OK, well that makes sense. Thanks for your help....

    OK, well that makes sense. Thanks for your help.

    ................oh, and damn that was a fast reply!
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    Thanks for the reply. I completely understand...

    Thanks for the reply. I completely understand this section of what you said.

    My concern is not the tune, it is the custom 2.5 bar OS that I have now. If I put a manual tune in my ECM will still be...
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    bump

    bump
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    Write Entire Help Needed.

    I have a 2005 vette that was originally an automatic. I swapped in the entire driveline from a manual tranny 06 Z51. Up to this point my car still thought it was an automatic. The TCM was still in...
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    Am I reading this right? Are you going to try to...

    Am I reading this right? Are you going to try to run 10 psi of boost to a 408 ci motor with stock injectors? Even 60# injectors aren't big enough for this kind of power. I have the same setup and,...
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    Seems it was my wideband. When I removed the...

    Seems it was my wideband. When I removed the wideband from my other car I didn't remove two small resistors that went from ground to each wire carrying the narrowband and the wideband signals. I now...
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    Will do Chris, thanks. :cheers:

    Will do Chris, thanks. :cheers:
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    While it is a good wideband, I agree that it has...

    While it is a good wideband, I agree that it has issues. The narrowbands don't even flinch at any of the WOT spikes. Also where the AFR is showing commanded at 14.7, the narrowbands are in the low to...
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    You're right, I wasn't failing it properly. I set...

    You're right, I wasn't failing it properly. I set it to "No MIL Light" instead of "MIL on first error".

    I have it failed correctly now:

    http://i160.photobucket.com/albums/t170/2000c-5/maf2.jpg...
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    Under normal driving I am only running one pump....

    Under normal driving I am only running one pump. The second pump is on a Hobbs switch set to come on at 5 psi. Each pump has it's own filter and this setup is brand new.

    It is also doing it at low...
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    Because of the 63# IFR limit in the E40. Most...

    Because of the 63# IFR limit in the E40. Most likely it does nothing, but at the same time, it doesn't hurt to have it in there.
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    Siemens

    Siemens
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