# Are Turbo Cars Quieter? **URL:** \ **Category:** SON240sx Automotive\ **Created:** [June 18, 2009, 3:40pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495 "2009-06-18T15:40:01Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Ciaran](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ciaran/32/5612_2.png) [@Ciaran](https://forums.speedlife.net/u/Ciaran)\ **Post date:** [June 18, 2009, 3:40pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/1 "2009-06-18T15:40:01Z")
everytime i hear a KA with en exhaust, its usually a lot louder then the sr equivalent with the same exhaust. is it just the displacement of the engines making the difference or what? ---
**Author:** ![Tacoboy](https://avatars.discourse-cdn.com/v4/letter/t/2acd7d/32.png) [@Tacoboy](https://forums.speedlife.net/u/Tacoboy)\ **Post date:** [June 18, 2009, 3:49pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/2 "2009-06-18T15:49:20Z")
I think it has to do with the turbo acting as a muffler. ---
**Author:** ![sidewayz240](https://avatars.discourse-cdn.com/v4/letter/s/e99b99/32.png) [@sidewayz240](https://forums.speedlife.net/u/sidewayz240)\ **Post date:** [June 18, 2009, 3:56pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/3 "2009-06-18T15:56:27Z")
> [@its official: HRK gets to fondle nuclear submarines](https://forums.speedlife.net/t/its-official-hrk-gets-to-fondle-nuclear-submarines/22522/28): > > I think it has to do with the turbo acting as a muffler. bingo ---
**Author:** ![87s15lt1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/87s15lt1/32/5706_2.png) [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)\ **Post date:** [June 18, 2009, 4:50pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/4 "2009-06-18T16:50:12Z")
The turbo charger restricts air from free flowing. Therefore slowing it down making it much much quiter. ---
**Author:** ![DJPyro](https://avatars.discourse-cdn.com/v4/letter/d/278dde/32.png) [@DJPyro](https://forums.speedlife.net/u/DJPyro)\ **Post date:** [June 18, 2009, 5:11pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/5 "2009-06-18T17:11:01Z")
^ Techncially, according to the letter of the law a turbo is considered a muffler. Hence why the SRT-4 is sold from the factory without one. And yes, that’s why. ---
**Author:** ![GTS](https://avatars.discourse-cdn.com/v4/letter/g/82dd89/32.png) [@GTS](https://forums.speedlife.net/u/GTS)\ **Post date:** [June 18, 2009, 5:14pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/6 "2009-06-18T17:14:51Z")
> [@The end of an era...bye bye Cobra.](https://forums.speedlife.net/t/the-end-of-an-era-bye-bye-cobra/22619/41): > > ^ Techncially, according to the letter of the law a turbo is considered a muffler. > > Hence why the SRT-4 is sold from the factory without one. > > And yes, that’s why. In that case, all turbo’ed cars could technically drive without a muffler? Straight pipe awesomeness for all?!!? ---
**Author:** ![KA24Power](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ka24power/32/5595_2.png) [@KA24Power](https://forums.speedlife.net/u/KA24Power)\ **Post date:** [June 18, 2009, 5:38pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/7 "2009-06-18T17:38:51Z")
sure, but good luck convincing the cop that pulls you over. ---
**Author:** ![Ciaran](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ciaran/32/5612_2.png) [@Ciaran](https://forums.speedlife.net/u/Ciaran)\ **Post date:** [June 18, 2009, 6:24pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/8 "2009-06-18T18:24:18Z")
hmm interesting. fuck my apexi n1’s then. lets get a straight pipe lol ---
**Author:** ![DJPyro](https://avatars.discourse-cdn.com/v4/letter/d/278dde/32.png) [@DJPyro](https://forums.speedlife.net/u/DJPyro)\ **Post date:** [June 18, 2009, 6:28pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/9 "2009-06-18T18:28:49Z")
> [@SOLD](https://forums.speedlife.net/t/sold/22638/7): > > sure, but good luck convincing the cop that pulls you over. Exactly. ---
**Author:** ![Hacknik](https://avatars.discourse-cdn.com/v4/letter/h/ba9def/32.png) [@Hacknik](https://forums.speedlife.net/u/Hacknik)\ **Post date:** [June 18, 2009, 7:37pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/10 "2009-06-18T19:37:06Z")
I learned something today 🙂 ---
**Author:** ![PureEuroM3](https://avatars.discourse-cdn.com/v4/letter/p/3bc359/32.png) [@PureEuroM3](https://forums.speedlife.net/u/PureEuroM3)\ **Post date:** [June 18, 2009, 7:43pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/11 "2009-06-18T19:43:29Z")
Convince a cop about what. Show the law technicality in court and you are free. ---
**Author:** ![Solarian](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/solarian/32/5514_2.png) [@Solarian](https://forums.speedlife.net/u/Solarian)\ **Post date:** [June 18, 2009, 8:50pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/12 "2009-06-18T20:50:35Z")
Maybe because I’m old, but all four bangers with any sort of exhaust are too loud for me. Especially turbo ones. Due to the restriction of the turbo, they drone like the zerg when they’re out of boost. ---
**Author:** ![XSNRGE](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/xsnrge/32/5565_2.png) [@XSNRGE](https://forums.speedlife.net/u/XSNRGE)\ **Post date:** [June 18, 2009, 9:39pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/13 "2009-06-18T21:39:06Z")
The reason 4 cylinder cars are louder than say a 5 cylinder or more, is because of the power laps. There’s at least 60-65 degrees of the 720\* degrees of crank rotation where the engine isn’t making any power. This rotation where the engine isn’t making any power is what makes the droning noise and the loudness you hear, versus a 5 cylinder engine. The 5 cylinder engine has less power lap, meaning it makes more power more efficiently. As one cylinder exits its power stroke, another one is about to start its power stroke. This gets even better on a 6 cylinder where the timing produces a power overlap, meaning just before a cylinder finishes its power stroke, another one is just starting. This produces a smooth and steady exhaust flow, causing less drone and noise. \*I say 720 degrees because every cylinder has 4 strokes. Time everything correctly and for 4 cylinders to complete all 4 strokes, its equal to 720 degrees. ---
**Author:** ![Blue\_S13](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/blue_s13/32/5563_2.png) [@Blue\_S13](https://forums.speedlife.net/u/Blue_S13)\ **Post date:** [June 18, 2009, 10:19pm UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/14 "2009-06-18T22:19:15Z")
Funny…I found that my CA was louder than the KA on a bings exhaust. Sounded mean at higher RPM and full boost. It was just as droning as the KA. 5Zigen ultra quiet for me now. ---
**Author:** ![87s15lt1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/87s15lt1/32/5706_2.png) [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)\ **Post date:** [June 19, 2009, 5:48am UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/15 "2009-06-19T05:48:39Z")
> [@The end of an era...bye bye Cobra.](https://forums.speedlife.net/t/the-end-of-an-era-bye-bye-cobra/22619/41): > > ^ Techncially, according to the letter of the law a turbo is considered a muffler. > > Hence why the SRT-4 is sold from the factory without one. > > And yes, that’s why. No cat you mean. They have mufflers. ---
**Author:** ![AhmadG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ahmadg/32/5577_2.png) [@AhmadG](https://forums.speedlife.net/u/AhmadG)\ **Post date:** [June 19, 2009, 6:00am UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/16 "2009-06-19T06:00:38Z")
I still think KA’s are one of the best sounding 4 cylinder engines. ---
**Author:** ![spd-dmn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spd-dmn/32/5513_2.png) [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)\ **Post date:** [June 19, 2009, 6:25am UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/17 "2009-06-19T06:25:57Z")
SRT-4s have cats, they don’t have mufflers but they do also have resonators to help quiet them down even if behind a turbo, straight pipes (no cat, no resonator) will still be a lot louder then an OEM neon srt-4 ---
**Author:** ![87s15lt1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/87s15lt1/32/5706_2.png) [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)\ **Post date:** [June 19, 2009, 6:33am UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/18 "2009-06-19T06:33:05Z")
My bad, you’re all right, I’m wrong. ![http://www.alldatapro.com/alldata/PRO%7EV125986281%7EC38349%7ER0%7EOB0%7EP3R0H%7EN/0/89012112/97272320/101483217/103003033/34853741/100411974/34856670/34856671/34856687/105800568/105781513](http://www.alldatapro.com/alldata/PRO%7EV125986281%7EC38349%7ER0%7EOB0%7EP3R0H%7EN/0/89012112/97272320/101483217/103003033/34853741/100411974/34856670/34856671/34856687/105800568/105781513) ---
**Author:** ![Fobwall](https://avatars.discourse-cdn.com/v4/letter/f/7ea924/32.png) [@Fobwall](https://forums.speedlife.net/u/Fobwall)\ **Post date:** [June 19, 2009, 7:16am UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/19 "2009-06-19T07:16:59Z")
Maybe that explains why SRT-4s sound like crappy…no offence but I can’t stand the sound of them. There so many pops and its so raspy. ---
**Author:** ![Tacoboy](https://avatars.discourse-cdn.com/v4/letter/t/2acd7d/32.png) [@Tacoboy](https://forums.speedlife.net/u/Tacoboy)\ **Post date:** [June 19, 2009, 8:46am UTC](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495/20 "2009-06-19T08:46:52Z")
^^ Maybe you are “a gay”? [Next page](https://forums.speedlife.net/t/are-turbo-cars-quieter/125495.md?page=2)