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Thread: Heads/Cam LS3, NGK says TR7IX

  1. #1
    Senior Tuner
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    Heads/Cam LS3, NGK says TR7IX

    My Camaro runs pretty good for a stock bottom end car...it does 500 rwhp and 462 rwtq with a pretty mild cam and good heads.

    I've been trying to understand why it's so sensitive on the dyno, at 12.5:1 and stock spark it's fine, at 12.7:1 it will knock and pull 2 degrees of timing and lose 30-35 foot pounds. I'd been running TR55's in it, gapped at 0.040, the 5 heat range is where I think the problems come from.

    I really want to be able to try to run 1 or 2 degrees more spark than stock to see if there's any more power there, I think there will be.

    NGK says to run a TR7IX...but I think a TR6 gapped around 0.035 should suffice. What do you guys think?
    2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
    2005 Silverado RCSB. Forged 370 LQ9/Borg-Forced Inductions T6 S484/Jake's Stage 4 4L80E with D3 Brake/4WD.
    2023 Durango Hellcat

  2. #2
    Senior Tuner LSxpwrdZ's Avatar
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    Try NGK 7092 first. What is the IVC point @ .050" on your cam and your static compression? You might be able to step to a 7... if so use a 5791.
    James Short - [email protected]
    Located in Central Kentucky
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    2020 Camaro 2SS | BTR 230 | GPI CNC Heads | MSD Intake | Rotofab | 2" LT's | Flex Fuel | 638rwhp / 540rwtq
    2002 Camaro | LSX 427 | CID LS7's | Twin GT5088's | Haltech Nexus R5 | RPM TH400

  3. #3
    Senior Tuner DSteck's Avatar
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    A 6 should be the ticket.

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  4. #4
    Senior Tuner Iam Broke's Avatar
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    TR6IX is 3689 and my preference on mine. TVS2300 @ 7.5 psi. 560whp/520 wtq on E47.
    '12 Camaro T3 2SS/RS LS3 M6, SLP TVS 2300, Flex Fuel

  5. #5
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    I picked up a set of TR6's today, when I finish putting the suspension back together and they clean the salt off our roads I'll be able to give it a shot.
    2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
    2005 Silverado RCSB. Forged 370 LQ9/Borg-Forced Inductions T6 S484/Jake's Stage 4 4L80E with D3 Brake/4WD.
    2023 Durango Hellcat