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C7 ZR1 Exhaust Flames

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  • C7 ZR1 Exhaust Flames

    Under certain conditions, the 2019 ZR1 can, by prolong shooting engine flames out the exhaust, potential damag the ZR1 badge and the rear fascia. Thanks to CorvetteActionCenter for the following Service Bulletin. Thankfully a software reprogram can fully solve this issue.



    Click image for larger version  Name:	72F8ECB4-B5FF-44D2-963C-C98F2BE24A3B.jpeg Views:	1 Size:	954.8 KB ID:	21022

    https://www.corvetteactioncenter.com...ile.php?id=146
    GS7 Elkhart Lake Blue, HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5ZZ high wing; 5VM vis CF ground effects pkg; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards.

    Lifetime, annual contributors, and 20+ year members of National Corvette Museum.

  • #2
    The flames are a misfire? And I thought it was all done on purpose. Silly me.
    2017 TR GS 2LT

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    • #3
      Actually both. The excessive length of time of the flames is a misfire. The actual flames are cool, and as you know, a secondary by-product of both intake port and cyclinder injection — as result of unburnt fuel being superheated.
      GS7 Elkhart Lake Blue, HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5ZZ high wing; 5VM vis CF ground effects pkg; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards.

      Lifetime, annual contributors, and 20+ year members of National Corvette Museum.

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      • #4
        John, I respectfully disagree and here is why. Please correct me where I a wrong in my analysis and conclusion.

        There is nothing in this writeup mentioning purposefully displaying flames unless you're referring to the second line where it states that "a fuel injector may be commanded on.....". This begs the question of how this feature is commanded on? Is there a flames on button with this feature? If no, then the rest of this same sentence references this being a misfire and not something done on purpose.
        2017 TR GS 2LT

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        • #5
          I can only share that at the ZR1’s reveal, that Tadge was happy to share (bragging is excessive to describe it) that due to the dual injection fuel mode, that under certain circumstances that flames were coming out the back. GM even released a video of this.



          There is no switch to turn on or off to create the flames. Additionally, TSB notes that this is only happening on certain vehicles.

          Originally posted by Automobile Mag
          Fuel delivery is handled by a combination of direct and port injection, a pairing that is said to be responsible for the car’s already-legendary ability to blow a jet of blue flame out of the exhaust at wide-open throttle.
          My take, could be wrong, is that there is no inherent problem with short term flame duration, but when there is a 7.5 second long flame as a result of a misfire, that is when there is a potential for flame damage, and since they are not going to change the dual fuel injection, that some vehicles are having an issue with too long a flaming occurrence.

          The correction is a ECM software reprogramming, something to prevent long duration flames. Reprogramming it will reduce the flame time duration lengt of the misfiring, and thus reduce fascia damage as a result of flame overheating it.




          GS7 Elkhart Lake Blue, HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5ZZ high wing; 5VM vis CF ground effects pkg; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards.

          Lifetime, annual contributors, and 20+ year members of National Corvette Museum.

          Comment


          • #6
            Ok thanks.
            now excluding this misfire and no actual flame on/off button, can one turn on the flames at will via acceleration or shifting or something else?
            2017 TR GS 2LT

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            • #7
              Sorry, the only last thing I was just able to learn was that this happens at full throttle.
              GS7 Elkhart Lake Blue, HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5ZZ high wing; 5VM vis CF ground effects pkg; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards.

              Lifetime, annual contributors, and 20+ year members of National Corvette Museum.

              Comment


              • #8
                Well, I guess I better forget about driving a ZR-1 through an old leaky oil refinery. I could blow the place up.

                Comment


                • #9
                  Originally posted by Ateupjoe View Post
                  The flames are a misfire? And I thought it was all done on purpose. Silly me.
                  That's what I'm thinking .............. Millions would gladly pay to have their car do that !
                  Ordered from Mike Furman @Criswell: 2020 C8 1LT, Ceramic Matrix Gray Metallic, GT1 Adrenaline Red Seats. Splash Guards. Corvette Museum Life Member

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                  • #10
                    They make aftermarket kits for exhaust flames that are easy to install. Ricers have done this for years

                    Comment

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