Jump to content
  • Testimonials

  • TRIFECTA Performance
    TRIFECTA Performance
    Sign in to follow this  

    TRIFECTA: Dual mode exhaust (bypass) valves on a Gen1 Cruze / Sonic?

      With our recent unveiling of FPCM (fuel pump control module) / CCM (chassis control module) recalibration to support larger injectors on the 1.4T, another idea struck us. Could we also recalibrate the FPCM/CCM to allow the addition of dual mode exhaust valves to the Gen1 Chevrolet Cruze / Chevrolet Sonic? Maybe, actually.

    It's common knowledge that the Corvette, going back to the mid 2000s has offered an exhaust valve option (RPO: NPP). In 2014, when the Chevrolet Corvette Stingray (C7) arrived, it included dual mode exhaust valves as standard equipment, as well as a set of "AFM exhaust valves" to help reduce the odd exhaust notes when the engine runs in 4 cylinder mode. When the 6th Gen Chevrolet Camaro came along, the dual mode exhaust valves became standard equipment on the SS and ZL1, and optional equipment on the V6.

     

    gallery_1_88_8226.jpg

     

    These exhaust valves are designed to stay closed during normal driving operation to meet federal noise standards, and essentially bypass the mufflers under hard acceleration for maximum performance. In Track mode, on the C7, the valves are designed to stay open all the time.

     

    gallery_1_88_205402.jpg

     

    The exhaust valves are controlled by the same ECU that controls the fuel pump pressure on the Chevrolet Cruze and Chevrolet Sonic. In fact, we found that the Camaro SS CCM is connector-compatible with the Cruze CCM! With a bit of wiring, and some software work in the CCM, retro-fitting exhaust valves on the Cruze / Sonic might be possible.

     

    gallery_1_88_99673.jpg

     

    Of course, the question is, how would one set up the exhaust valve? One idea we have is to T the single exhaust near the rear of the car into two pipes, one going through a standard muffler, and the other, through an exhaust valve, to a straight pipe out the back (or a cut out).

     

    Just one of the innovative projects TRIFECTA has on the horizon for 2018!

    • Like 1

    Sign in to follow this  


    User Feedback

    Recommended Comments

    There are no comments to display.



    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now

×