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C7 ZR1 Exhaust Flames

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  • #1

    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
    GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.
    Tags: stingray
  • #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.
      GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.
      • 1 like

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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.




          GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.
          • 1 like

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          • #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.
              GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.
              • 1 like

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              • #8
                Well, I guess I better forget about driving a ZR-1 through an old leaky oil refinery. I could blow the place up.
                Expected build - 2022 HTC 2LT Z51
                Front lift, mag ride
                black exterior, adrenaline red interior, bright red calipers
                • 4 likes

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                • #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 !
                  2022 1LT Coupe Hypersonic Gray Metallic Carbon Flash wheels Yellow calipers Yellow Seat Belts Corvette Museum Life Member . Red White and BBQ ........ TX, It's A Whole 'Nother Country !
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                  • #10
                    They make aftermarket kits for exhaust flames that are easy to install. Ricers have done this for years
                    3LT Long Beach Red , Z51, FE4 , ZZ3, Black interior ,38S red stitching, Q8T, FA5, ER1, CFX, and R8C

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                    • #11
                      The base C8 also shoots flames, according to this GM video at 3:44 and 8:05.

                      Hey, GM wouldn't make the video if it weren't true, right?
                      .
                      .
                      My C8:
                      '20 Elkhart Lake Blue 2LT Coupe, Natural Interior, GT2 Two-Tone Seats, Performance Exhaust, Front Lift, Carbon Flash Wheels, Engine Appearance Package 2000 Status December 27, 2019; 3000 Status January 2, 2020; 3400 Status March 10, 2020;TPW March 16, 2020; Built June 4th, 2020 (COVID-19); Delivery July 1, 2020

                      Current Vettes:
                      '68 Lemans Blue 327/350 Convertible
                      '91 Turquoise Convertible with Hardtop
                      '14 Lime Rock Green 2LT Convertible, Black Top, Kalahari, 7-Speed, Performance Exhaust
                      • 3 likes

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                      • #12
                        Originally posted by Racer86 View Post
                        They make aftermarket kits for exhaust flames that are easy to install. Ricers have done this for years
                        I would want colors like red and orange in my exhaust flames. Great for 4 th of JULY events! Just kidding!

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                        • #13
                          Caution to those who do. While this is as all know factory standard on the 2019 ZR1, in its testing and development they realized they needed to implement additional steps to prevent melting consequences.
                          GBA Black; HTO Twilight/Tension interior; Z51 & Mag Ride; E60 lift; 5VM visible carbon fiber package; 5ZZ high wing; FA5 interior vis CF; ZZ3 engine appearance; 3LT; Q8T Spectra Gray Tridents; J6N Edge Red Calipers; SNG Edge Red Hashmarks; VQK Splash Guards; RCC Edge Red engine cover; VJR illuminated sill plates. Lifetime, annual contributors, and 23 year members of National Corvette Museum. Home is the beautiful Pacific Northwest.

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                          • #14
                            Originally posted by Milliwatt Rob View Post
                            Well, I guess I better forget about driving a ZR-1 through an old leaky oil refinery. I could blow the place up.
                            Just think of the fun you could roast things that needed it. Even adapt to BQQ's!

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                            • #15
                              Originally posted by 3 Z06ZR1 View Post

                              Just think of the fun you could roast things that needed it. Even adapt to BQQ's!
                              https://jalopnik.com/watch-a-dummy-s...-ke-1847008743
                              Delivered 5/29!: Scarlet Fever 2021 2LT HTC, Red Mist Metallic Tintcoat, two-tone Naturalw/ suede inserts, Mag Ride, Performance Exhaust, MRR 755 Gunmetal wheels

                              Proud member of the Old Dominion Corvette Club: https://www.olddominioncorvetteclub.org/

                              Never grow up - It's a trap.
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