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Thread: Final tune reivew before returning tuning gear

  1. #1

    Final tune reivew before returning tuning gear

    Here is what I hope is my final tune, I have reenabled STFT, COT, DFCO and closed loop.

    Please review the attached tune and logs and tell me if anything screams at you (minus the KR, I hevent replaced the sensors yet)

    The STFT sorted out my lean during warmup issues which was nice.

    Thanks again.

    14 May Final - STFT, COT, Closed loop, enabled-1.hpt
    15 may final - warmup.hpl
    15 may final - after warmup.hpl
    1999 6.0L LQ4 block
    243 heads
    Upgraded rods with LY6 pistons
    BTR LS3 stage 1. - 221/228 .608/.571 112+2
    2010 Camaro SS Exhaust Manifolds
    2006 LS2 Injectors
    Stock truck intake - DBC

  2. #2
    Senior Tuner
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    Bouncing off rev limiter before shift completes. Adjust shift point rpm's or increase fuel cutoff rpm limiter. They are the exact same value right now. Generally, it works better to have shift mph happen well in advance of shift rpm, so keep track of that. Both conditions must be met, and the trans logic does a better job if mph condition is met well before rpm.

    STFT's show that fueling needs a little fine-tuning. Are you sure about that VE table? Looks a little 'vette-ish. I don't see a truck intake making that shape.
    Last edited by SiriusC1024; 05-15-2023 at 05:24 PM.

  3. #3
    I will adjust the VE, I dropped the uppers a bit on that last tune, trying to smooth things out, might have went a bit far.

    I was looking for the rev limiter, I had adjusted it before as I was bouncing off it, must have went back on the tune somewhere. I will look at that, thanks.
    1999 6.0L LQ4 block
    243 heads
    Upgraded rods with LY6 pistons
    BTR LS3 stage 1. - 221/228 .608/.571 112+2
    2010 Camaro SS Exhaust Manifolds
    2006 LS2 Injectors
    Stock truck intake - DBC

  4. #4
    Didnt realize there were two spots to adjust the limiter/shift points. No wonder the thing didnt like to rev...

    What should a 6L rev to? (time to find my cam card again)
    1999 6.0L LQ4 block
    243 heads
    Upgraded rods with LY6 pistons
    BTR LS3 stage 1. - 221/228 .608/.571 112+2
    2010 Camaro SS Exhaust Manifolds
    2006 LS2 Injectors
    Stock truck intake - DBC

  5. #5
    Senior Tuner
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    Mar 2022
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    Indiana
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    As far as upper limit that depends. For example, a 2005 6.0 is gen 3, but it has gen 4 rods. Assuming regular old unmodified gen 3 truck engine I'd say 6-6100. Your motor is cammed, so it should also have an LS7 lifter upgrade, aftermarket pushrods, trunnion upgrade, and springs. You can wind it up a bit higher with those supporting mods. 6400 is about as high as I'd take it with post 2001 gen 3 rods with the supporting mods. 6650 with the gen 4 rods. Any higher and there's a risk of oil aeration.

    That's all if the intake doesn't completely run out of breath in the upper RPM's. An accurate VE table will show what to do. Think about where you'll be in the power after a shift. Maximize the area under the curve.
    Last edited by SiriusC1024; 05-15-2023 at 06:42 PM.

  6. #6
    Thanks, it has upgraded rods, arp bolts, lifter upgrade, trunnion upgrade, springs\push rods came with the Brian Tooley cam kit.
    1999 6.0L LQ4 block
    243 heads
    Upgraded rods with LY6 pistons
    BTR LS3 stage 1. - 221/228 .608/.571 112+2
    2010 Camaro SS Exhaust Manifolds
    2006 LS2 Injectors
    Stock truck intake - DBC

  7. #7
    Funny I never got it wound up enough to do the higher VE points. Now I know why... so many little things to catch when doing this!
    1999 6.0L LQ4 block
    243 heads
    Upgraded rods with LY6 pistons
    BTR LS3 stage 1. - 221/228 .608/.571 112+2
    2010 Camaro SS Exhaust Manifolds
    2006 LS2 Injectors
    Stock truck intake - DBC

  8. #8
    Senior Tuner
    Join Date
    Mar 2022
    Location
    Indiana
    Posts
    2,945
    Interesting choice on the cam. Being for an LS3 I assume it's optimized for rec port and their bigger valves, but you've got cathedral heads. Split lift, too. What made you go with that option?
    Last edited by SiriusC1024; 05-15-2023 at 07:52 PM.

  9. #9
    Quote Originally Posted by SiriusC1024 View Post
    Interesting choice on the cam. Being for an LS3 I assume it's optimized for rec port and their bigger valves, but you've got cathedral heads. Split lift, too. What made you go with that option?
    Sorry missed this.

    I had a lengthly chat with the Brian Tooley crew with what I had, and what I planned on doing with it. I did not want to have to go to a higher stall convertor, and with the other mods, this was their recommendation.

    Its a nice cam, good power and pretty smooth idle, which is pretty much all I wanted. Now i just need to wrap up this damn tune
    1999 6.0L LQ4 block
    243 heads
    Upgraded rods with LY6 pistons
    BTR LS3 stage 1. - 221/228 .608/.571 112+2
    2010 Camaro SS Exhaust Manifolds
    2006 LS2 Injectors
    Stock truck intake - DBC

  10. #10
    Senior Tuner
    Join Date
    Mar 2022
    Location
    Indiana
    Posts
    2,945
    Nice. Good luck with the rest of your build/tune. Let us know if you need anything.

  11. #11
    I will, thanks again for the help. I will get those changes made and loaded up for some more driving.
    1999 6.0L LQ4 block
    243 heads
    Upgraded rods with LY6 pistons
    BTR LS3 stage 1. - 221/228 .608/.571 112+2
    2010 Camaro SS Exhaust Manifolds
    2006 LS2 Injectors
    Stock truck intake - DBC