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C8 Exhaust Sound: We Have Not Yet Heard It’s Potential Loudness

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  • C8 Exhaust Sound: We Have Not Yet Heard It’s Potential Loudness



    I was re-watching to the CorvetteBlogger April 27th video of the C8’s NCM Bash circular drive by, and heard something from a person who know just how loud the C8’s exhaust can be, knowing that from his own ears and comparing it to the C8’s sound in this video.

    There was a top Corvette team person who said at the end of the video, “He kept that exhaust quiet.” This comment was from one who has first person, direct knowledge of what he C8’s exhaust loudness can sound like.

    Who made that comment which we can clearly hear in the video? It was Jeff Strausser, Corvette Brand Quality Manager (in the blue shirt walking toward the camera).

    Jeff made that comment that at 1:09 in this great CB video of the NCM circle drive through. He was referring to its brisk acceleration on the main road as it drove away. Yet, it was way quiet.

    It will be so nice to hear how loud the C8’s exhaust really can be.


    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.

  • #2
    I like the fact that with the C7 you can adjust the exhaust note from quiet to loud. Glad to see that will continue with the C8.

    On my 2007 C6, I had Corsa Extreme with a supercharged/cammed/heads/headers LS2 and it was really loud all the time. Sometimes it's good to be quiet but that wasn't possible with my C6.
    1966 coupe - Sunfire Yellow / Black
    2004 Z06 - Millennium Yellow / Black

    NCM Lifetime Member since 2003

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    • #3
      My thoughts exactly. When we do a long interstate day, that is one of the rare times we turn out exhaust down. Makes it a nicer IOO. However, the rest of the time, ours s set to max loud.
      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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      • #4
        Yep. My valves are always open, except on the highway or when leaving my house early in the morning (keep the neighbors happy).
        Delivered 5/29!: Scarlet Fever 2021 2LT HTC, Red Mist Metallic Tintcoat, two-tone Natural w/ suede inserts, Mag Ride, Performance Exhaust

        Gone but not forgotten: SunKissed, 2015 2LT, 7MT, Black over Daytona Sunrise Orange Metallic, Stingray convertible

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

        Never grow up - It's a trap.

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        • #5
          I love having the flexibility of changing the exhaust note. Loud when I want it and quite when I need it, the best of both worlds.
          Last edited by Fasttoys; 05-06-2019, 11:17 PM.

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          • #6
            Npp rules....sometimes you just want it subdued....early AM escapes.....and late night arrivals.....highway for long distances...and sometimes....you want it loud and crazy...

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            • #7
              NPP is a great option, and definitely a must-have on my C8.

              I'll normally take the long way through my subdivision, and into an adjacent neighborhood to let the engine/tranny warm before heading out to my favorite roads.

              I'll perform this warm-up in Tour Mode. By the time I switch to Track Mode (my preferred driving mode, to enjoy the syncopating sounds of the melodious exhaust), the exhaust has also warmed, and little moisture is left in the mufflers, helping to keep the outboard muffler tips clean.
              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

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              • #8
                I keep my NPP in "open" mode all the time. I assume the C8's exhaust with its LT2 and a "reported" 530 HP will be louder than our base 460 HP LT1 C7s.
                Last edited by Boomer; 05-07-2019, 08:28 AM.

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                • #9
                  Originally posted by Boomer View Post
                  I keep my NPP in "open" mode all the time. I assume the C8's exhaust with its LT2 and a "reported" 530 HP will be louder than our base 460 HP LT1 C7s.
                  it's difficult to say, as a lot of it comes down to the C8 exhaust and muffler design, but I suspect that you're 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

                  Comment


                  • #10
                    Originally posted by Mobius View Post
                    it's difficult to say, as a lot of it comes down to the C8 exhaust and muffler design, but I suspect that you're right.
                    Yea good point. As a total non-engineer, I figure since the exhaust system will be shorter cause the engine is in the "rear" there will be less muffling of the sound. Also cause it will be tight back there with the engine and everything else, the mufflers will need to be smaller and less restrictive.

                    I think in addition to emissions, the tone and db level should be the primary focus for the design of the exhaust system.
                    Last edited by Boomer; 05-09-2019, 05:00 PM. Reason: emissions

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                    • #11
                      Guess I'm the odd one out here. If I'm driving in a subdued manner I want a quiet exhaust, but for spirited driving I want an even quieter exhaust so I don't draw the attention of police. A loud exhaust is yet another provocation to a police officer that could decisively tip his decision between a warning and a ticket.

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                      • #12
                        Originally posted by Boomer View Post

                        Yea good point. As a total non-engineer, I figure since the exhaust system will be shorter cause the engine is in the "rear" there will be less muffling of the sound. Also cause it will be tight back there with the engine and everything else, the mufflers will need to be smaller and less restrictive.

                        Since I can say whatever I want, I think the tone and db level should be the primary focus for the design of the exhaust system.
                        Actually, smaller sometimes mean MORE restrictive. But GM spent a lot of time tuning the exhaust on the C7, and controlling the valves so even in track mode it quiets down at steady speeds of 35 mph and lower to pass the EPA's drive by sound tests, while opening up at higher speed and large throttle openings.. I'm sure they won't do any less for the C8.
                        Delivered 5/29!: Scarlet Fever 2021 2LT HTC, Red Mist Metallic Tintcoat, two-tone Natural w/ suede inserts, Mag Ride, Performance Exhaust

                        Gone but not forgotten: SunKissed, 2015 2LT, 7MT, Black over Daytona Sunrise Orange Metallic, Stingray convertible

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

                        Never grow up - It's a trap.

                        Comment


                        • #13
                          Originally posted by meyerweb View Post
                          But GM spent a lot of time tuning the exhaust on the C7, and controlling the valves so even in track mode it quiets down at steady speeds of 35 mph and lower to pass the EPA's drive by sound tests, while opening up at higher speed and large throttle openings. I'm sure they won't do any less for the C8.
                          I think thats a 50 foot sound measurement distance from the drive by. Plus maybe a stationary throttle. Don't know for sure. But I'm sure my C7 would more than meet it leaving room for the C8 to "expand". Tire noise makes up some of it. I'd like to see three NPP settings with the third just meeting noise requirements.
                          Last edited by Boomer; 05-09-2019, 05:11 PM. Reason: clarity

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                          • #14
                            Originally posted by Boomer View Post
                            I think thats a 50 foot drive by plus maybe a stationary throttle. Don't know for sure. But I'm sure my C7 would more than meet it leaving room for the C8 to "expand". Tire noise makes up some of it. I'd like to see three NPP settings with the third just meeting noise requirements.
                            I did a bunch of research on what the standards were back when people figured out that even in track mode the valves closed up at certain rpms. In testing, I discovered it wasn't a specific rpm, it was a specific speed. Then I found the federal noise standards, and the only federal requirement is a drive by at speeds of up to 35 mph. Some states may have a stricter standard.

                            Later, someone on another forum had the opportunity to ask Tadge why the valves closed at low speed in track mode. His answer was "because we wouldn't be legal if they didn't."

                            Let's see....

                            Here's my original write up: https://www.stingrayforums.com/forum...tml#post557121
                            Delivered 5/29!: Scarlet Fever 2021 2LT HTC, Red Mist Metallic Tintcoat, two-tone Natural w/ suede inserts, Mag Ride, Performance Exhaust

                            Gone but not forgotten: SunKissed, 2015 2LT, 7MT, Black over Daytona Sunrise Orange Metallic, Stingray convertible

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

                            Never grow up - It's a trap.

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