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Thread: [HP Tuners] pro tuner needed

  1. #21
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    Quote Originally Posted by TriPinTaZ View Post
    Are you changing both of the minimum spark tables? Minimum Base and Long Term.

    If you have factory exhaust and primary cats it will never sound like the car in this video. In facts as mentioned, it is bad for OEM cats if they are ceramic based.
    Yes, I am making the same change to both tables.

    You?re right! I should convert back and wait until the long tube header is installed.

  2. #22
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    Hey gents, lots of good information regarding this. If I have a stock A8 c7z06 and would like some burbles (not as much as alessio) should I consider swapping to borla xpipe as well? Also would just the tuner device be suffice on a stock car to create this beautiful sound

  3. #23
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    Quote Originally Posted by Wilbergz View Post
    Hey gents, lots of good information regarding this. If I have a stock A8 c7z06 and would like some burbles (not as much as alessio) should I consider swapping to borla xpipe as well? Also would just the tuner device be suffice on a stock car to create this beautiful sound
    Sorry to bring up an old thread but I also have a Z06 (M7) and was wondering along with the timing changes to both areas as stated previously, is there a need to change anything regarding any of the DFCO parameters?

  4. #24
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    ...
    Last edited by mtb703; 07-08-2020 at 09:39 AM.

  5. #25
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    Quote Originally Posted by Wilbergz View Post
    Hey gents, lots of good information regarding this. If I have a stock A8 c7z06 and would like some burbles (not as much as alessio) should I consider swapping to borla xpipe as well? Also would just the tuner device be suffice on a stock car to create this beautiful sound
    Not a lot of reason to try and get more burbles on the stock exhaust setup with 4 cats. They will pretty much drown it out. You at least need a secondary cat delete.



    Quote Originally Posted by Z06John View Post
    Sorry to bring up an old thread but I also have a Z06 (M7) and was wondering along with the timing changes to both areas as stated previously, is there a need to change anything regarding any of the DFCO parameters?
    There is no need to change DFCO at all. The safe way to set this up is to allow the much lower spark advance as you lift throttle and the car transitions into DFCO. This way you will get plenty or burbles for a few seconds. If you have headers and high flow cats you can turn it into snaps crackles and pops as it transitions and it will sound great. Now if you have NO CATS, you can disable DFCO and the car will endlessly crack and pop rather obnoxiously on decel. It will burn up extra fuel and in my opinion be incredibly annoying. If you disable DFCO and you have CATs, you will shorten their life at minimum and you could even destroy them with the excessive non stop pops.

    IMO, it sounds best by lowering the base spark between 2000-3600 columns and leaving DFCO alone. This way you will not have weird burbles in the parking lot at low speeds and you wont have needlessly low timing when cruising and letting off the throttle where pops are not created anyhow, just low low timing and hot exhaust heating up the cats. But you will have wonderful pops and crackles on throttle blips, rev match down shifts(manual), and paddle downshifts(auto).
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  6. #26
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    Quote Originally Posted by TriPinTaZ View Post
    Not a lot of reason to try and get more burbles on the stock exhaust setup with 4 cats. They will pretty much drown it out. You at least need a secondary cat delete.





    There is no need to change DFCO at all. The safe way to set this up is to allow the much lower spark advance as you lift throttle and the car transitions into DFCO. This way you will get plenty or burbles for a few seconds. If you have headers and high flow cats you can turn it into snaps crackles and pops as it transitions and it will sound great. Now if you have NO CATS, you can disable DFCO and the car will endlessly crack and pop rather obnoxiously on decel. It will burn up extra fuel and in my opinion be incredibly annoying. If you disable DFCO and you have CATs, you will shorten their life at minimum and you could even destroy them with the excessive non stop pops.

    IMO, it sounds best by lowering the base spark between 2000-3600 columns and leaving DFCO alone. This way you will not have weird burbles in the parking lot at low speeds and you wont have needlessly low timing when cruising and letting off the throttle where pops are not created anyhow, just low low timing and hot exhaust heating up the cats. But you will have wonderful pops and crackles on throttle blips, rev match down shifts(manual), and paddle downshifts(auto).
    I messed with the min spark tables and the main spark tables started at 10 and went all the way down to -10 and got no pops on my C7 Z06. I can see the timing drop on decel but almost sounds like there is no fuel to ignite it. I tried disabling dfco but no change. I still have all four cats. Stock A8 cars burble/pop on downshifts and so do ZR1 stock, so I feel like I should still be hearing some pops? I've done this on a number of different cars and never had a problem getting pops, not sure why this car won't do it. My C6 Z06 would pop good at 10 on decel but had full catless headers. I'm waiting on my catless xpipe to come in and hoping it's just that extra muffling. I also posted a thread on it if you have any insight.

  7. #27
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    Quote Originally Posted by Creatre View Post
    I messed with the min spark tables and the main spark tables started at 10 and went all the way down to -10 and got no pops on my C7 Z06. I can see the timing drop on decel but almost sounds like there is no fuel to ignite it. I tried disabling dfco but no change. I still have all four cats. Stock A8 cars burble/pop on downshifts and so do ZR1 stock, so I feel like I should still be hearing some pops? I've done this on a number of different cars and never had a problem getting pops, not sure why this car won't do it. My C6 Z06 would pop good at 10 on decel but had full catless headers. I'm waiting on my catless xpipe to come in and hoping it's just that extra muffling. I also posted a thread on it if you have any insight.
    You wont get any pops with all 4 cats.
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  8. #28
    Tuner in Training Craig18SSA8's Avatar
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    Quote Originally Posted by TriPinTaZ View Post
    You wont get any pops with all 4 cats.
    Mine popped with cats no problem. Until the exhaust was warm. When on E85 it has way less pops. Is that timing related as well? Or because the E85 burns with less intensity in general? After headers, i get pops on 92. None on E85. However, it appears to pop less with headers and no cats.
    Drives: 2018 Camaro SS A8
    Modifications: Roto-Fab Intake, E85, NW 103mm TB, 1 7/8" Headers/muffler delete, MSD Atomic Airforce Intake Manifold
    150hp Wet shot on progressive control/standalone fuel system

  9. #29
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    Quote Originally Posted by Craig18SSA8 View Post
    Mine popped with cats no problem. Until the exhaust was warm. When on E85 it has way less pops. Is that timing related as well? Or because the E85 burns with less intensity in general? After headers, i get pops on 92. None on E85. However, it appears to pop less with headers and no cats.
    I've had cars where they popped less on e85, I guess maybe because it's harder to ignite. With 7 degrees of timing on my c6 z06 and 85% ethanol, still could get it to pop a ton on decel though.

  10. #30
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    Quote Originally Posted by Craig18SSA8 View Post
    Mine popped with cats no problem. Until the exhaust was warm. When on E85 it has way less pops. Is that timing related as well? Or because the E85 burns with less intensity in general? After headers, i get pops on 92. None on E85. However, it appears to pop less with headers and no cats.
    It's all 100% timing related. With all 4 cats your pops will be much softer than with headers and no or high flow cats.

    Quote Originally Posted by Creatre View Post
    I've had cars where they popped less on e85, I guess maybe because it's harder to ignite. With 7 degrees of timing on my c6 z06 and 85% ethanol, still could get it to pop a ton on decel though.
    It's all timing related and also has to do with how fast DFCO kicks in. A hot exhaust does seem to help with the pops, but it is not the reason. When I do aggressive "burble" tunes the cars pop the most when cold because the Lambda is richer and DFCO/CFCO is disabled until they warm up.
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