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How can I Reduce Turbo Noise?

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Old 12-22-2015, 01:39 PM
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NYOverlord
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Default How can I Reduce Turbo Noise?

Unlike most people, I don't like the sound of turbos. I prefer to hear my cam and motor in general.
I have a C6 ZO6 with a 434 cubic inch LS based all aluminum engine, TTIX twin turbo kit with 6265 turbos, stock LS7 exhaust, PRC 265 heads, PMC billet/sheet metal intake manifold, dual nozzle meth injection, E85.

Is there anything I can do to minimize the sound of the turbos like get louder mufflers such as B&B Fusion Extreme in order to increase the sounds of the cam or motor, or will that also increase the sound of the turbos?

I remember Gus from Lethal Performance mentioning something about having the wastegates dump back into the exhaust instead of into the atmosphere. -Does this make sense?

Last edited by NYOverlord; 12-22-2015 at 02:51 PM.
Old 12-22-2015, 01:51 PM
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schpenxel
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Sacrilegious!

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Old 12-22-2015, 02:00 PM
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C6 Curtis
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Lol never herd of that but go with a big cam then. My car beats the ground sounds n/a at idle then it's all spool wide open
Old 12-22-2015, 02:14 PM
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0CK@UPPCOS
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The more complex the intake (filters) of the turbo and the exhaust (mufflers) the quieter the turbos will be. So running straight pipes would be the loudest turbo noise possible. A mix would be a louder exhaust, but still keeping the mufflers in the loop. Like a flowmaster 40 series, although they sound horrible on an LS IMO.

CK
Old 12-22-2015, 02:52 PM
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NYOverlord
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Originally Posted by schpenxel
Sacrilegious!

I know, I know. I just want my car to sound like a car, not a space ship. Also, I LOVE the sound of a hot cam in a pounding V8.
Old 12-22-2015, 02:53 PM
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NYOverlord
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Originally Posted by CK@UPPCOS
The more complex the intake (filters) of the turbo and the exhaust (mufflers) the quieter the turbos will be. So running straight pipes would be the loudest turbo noise possible. A mix would be a louder exhaust, but still keeping the mufflers in the loop. Like a flowmaster 40 series, although they sound horrible on an LS IMO.

CK
Figures a turbo kit manufacturer would have the most knowledge.

-Thanks CK!
Old 12-22-2015, 03:03 PM
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timmyZ06
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Im sure you are talking about the sound WOT! If your wastegates are external, then when you hit full boost the scream out exhaust gasses directy! What you want is to reroute them in the exhaust. So now exhaust will soak up all the noise. Only thing left is the spool up sounds!!! But if you ask me, a turbo vette no longer sounds like a vette should! Turbos intercepting the exhaust stream change the sound of any exhaust radically! If yo want a nice V8 sounds its a combination of H/C LT's and a blower!
Old 12-22-2015, 03:12 PM
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Dude_man
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Are you positive you want a 1200hp hp turbo vette?
Old 12-22-2015, 03:19 PM
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NYOverlord
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Little late to start questioning this now haha!!
All the parts have been paid for and arrived. Just waiting for a lift to open at my tuner's shop. Everything will start getting installed the 1st or 2nd week in Jan. So it's going down regardless of how it ends up sounding lol!

Last edited by NYOverlord; 12-22-2015 at 03:19 PM.
Old 12-22-2015, 04:02 PM
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Unreal
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Routing the WG back to exhaust will further limit power of the kit. Better to leave them open.
Old 12-22-2015, 04:26 PM
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NYOverlord
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When I had a blower (ECS kit), I opted for the "quiet" blow off valve. Is there anything like this I can purchase at an extra cost? Maybe a quiet blow off valve or something?
Old 12-22-2015, 04:32 PM
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Youre building the wrong car lol
Old 12-22-2015, 04:42 PM
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timmyZ06
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Originally Posted by Unreal
Routing the WG back to exhaust will further limit power of the kit. Better to leave them open.
There's always trade up is it??!!
Old 12-22-2015, 04:44 PM
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C6 Curtis
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Originally Posted by NYOverlord
When I had a blower (ECS kit), I opted for the "quiet" blow off valve. Is there anything like this I can purchase at an extra cost? Maybe a quiet blow off valve or something?
Recirculate it. But if a beefy sounding car is what you wanted and wanted 1000whp you should've built it high compression with a solid roller cam and 400hp of nitrous. Easy 1000whp car. Would've been louder then a space ship. Would've been like the Daytona 500 every time you started the car.

Last edited by C6 Curtis; 12-22-2015 at 04:45 PM.
Old 12-22-2015, 04:50 PM
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Originally Posted by Dude_man
Youre building the wrong car lol
That might be true, what's your goals?
Old 12-22-2015, 04:58 PM
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neverstop
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basically any option limiting turbo noise will restrict hp
Old 12-22-2015, 06:31 PM
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Streetk14
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Originally Posted by NYOverlord
I know, I know. I just want my car to sound like a car, not a space ship. Also, I LOVE the sound of a hot cam in a pounding V8.
Maybe I'm missing something, but you really shouldn't be hearing any turbo noise at idle. The turbos are going to change and quiet the exhaust tone, but that should be it. Under load you're going to have spooling sounds, but I don't have any experience with wastegate dumps myself. I've only owned internally gated turbo cars. And the BOV should only make noise when lifting from a boosted situation. It's not going to do the centri street sweeper thing.

Hate to say it, but it does sound like you're building the wrong car. Noise aside, I think trying to build a daily driver at this level is probably a mistake.

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Old 12-22-2015, 06:48 PM
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Detoxx03
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Originally Posted by Dude_man
Youre building the wrong car lol
Yep yep yep
Old 12-22-2015, 10:47 PM
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OhioC5
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Was the ECS kit quiet with the quieter of the two valves? I ordered the ECS with the quieter blow off valve. I would love to hear the turbos spool, it was the favorite part of my Grand National.
Old 12-22-2015, 11:00 PM
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If I'm reading the post correctly, this a build in progress so the concern is hypothetical? Am I correct original poster that your concern is from the videos of other turbo vettes?

Originally Posted by NYOverlord
Little late to start questioning this now haha!!
All the parts have been paid for and arrived. Just waiting for a lift to open at my tuner's shop. Everything will start getting installed the 1st or 2nd week in Jan. So it's going down regardless of how it ends up sounding lol!


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