Shkreet Car Interior Deshibul Levelsh
07-03-2018, 08:53 PM
#21
I can’t add any scientific info but I have the same mid pipe. I have ran it with a big magniflow muffler and presently with a dump at the end. The drone/resonance with the hardtop on in terrible both setups.
My car is a dedicated csp car. I think there is a reason they call the mid pipe a race pipe. Keep it above 4K and no problems.
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07-03-2018, 09:17 PM
#22
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Join Date: Apr 2016
Location: Atlanta
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115dB SPL is about the loudness of a rock concert. Maximum recommended exposure without hearing protection is 30 seconds.
I’m not questioning that your car sounds like ****, I just don’t think it’s 115dB in the cabin. Methinks your Iphone measuring tool is *****. FWIW, I ran a stock header through a cat and into an RS3 exhaust, and even that was too loud for my delicate flower ears. It’s super obnoxious after a while.
I’m not questioning that your car sounds like ****, I just don’t think it’s 115dB in the cabin. Methinks your Iphone measuring tool is *****. FWIW, I ran a stock header through a cat and into an RS3 exhaust, and even that was too loud for my delicate flower ears. It’s super obnoxious after a while.
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07-03-2018, 10:19 PM
#27
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Join Date: Jan 2011
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07-03-2018, 11:41 PM
#28
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Location: Jacksonville, FL
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Are all the exhaust gaskets good? U personally checked they are not leaking air?
I had rb header, stock midpipe, rb dual tip exhaust and it was almost stock quiet. Just a tad more aggressive sounding.
on my current car while while waiting for EFR turbo I put on stock nb2 header, into 3" catless exhaust with a big magnaflow muffler, it was louder, but still perfectly ok on the hwy.
now I drove my new EFR turbo setup to a shop with Just an open downpipe to the muffler shop to get it welded to my exhaust, and I seriously almost went deaf. Even with full ear, ear muffs it was rediculously loud.
I had rb header, stock midpipe, rb dual tip exhaust and it was almost stock quiet. Just a tad more aggressive sounding.
on my current car while while waiting for EFR turbo I put on stock nb2 header, into 3" catless exhaust with a big magnaflow muffler, it was louder, but still perfectly ok on the hwy.
now I drove my new EFR turbo setup to a shop with Just an open downpipe to the muffler shop to get it welded to my exhaust, and I seriously almost went deaf. Even with full ear, ear muffs it was rediculously loud.
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07-03-2018, 11:57 PM
#29
Are all the exhaust gaskets good? U personally checked they are not leaking air?
I had rb header, stock midpipe, rb dual tip exhaust and it was almost stock quiet. Just a tad more aggressive sounding.
on my current car while while waiting for EFR turbo I put on stock nb2 header, into 3" catless exhaust with a big magnaflow muffler, it was louder, but still perfectly ok on the hwy.
now I drove my new EFR turbo setup to a shop with Just an open downpipe to the muffler shop to get it welded to my exhaust, and I seriously almost went deaf. Even with full ear, ear muffs it was rediculously loud.
I had rb header, stock midpipe, rb dual tip exhaust and it was almost stock quiet. Just a tad more aggressive sounding.
on my current car while while waiting for EFR turbo I put on stock nb2 header, into 3" catless exhaust with a big magnaflow muffler, it was louder, but still perfectly ok on the hwy.
now I drove my new EFR turbo setup to a shop with Just an open downpipe to the muffler shop to get it welded to my exhaust, and I seriously almost went deaf. Even with full ear, ear muffs it was rediculously loud.
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07-04-2018, 12:37 AM
#31
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Location: Santa Clara, CA
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Sound meters on phones are toys. Proper sound meters not only need to be calibrated, they also need to be frequency weighted because the same sound pressure is perceived as different volume at different frequencies. The phone sound meter apps I've seen are all flat.
--Ian
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07-04-2018, 10:14 AM
#33
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Also, have you done the bare minimum interior soundproofing, like stuffing foam or other similar **** in the body tunnels and whatnot? Get a couple sleeping bags and unroll them and stuff them in the trunk so they fill the space; see if that changes the sound at all.
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07-04-2018, 12:00 PM
#34
On the same phone? If so, then that's because they're both using the same uncalibrated microphone hardware.
Sound meters on phones are toys. Proper sound meters not only need to be calibrated, they also need to be frequency weighted because the same sound pressure is perceived as different volume at different frequencies. The phone sound meter apps I've seen are all flat.
--Ian
Sound meters on phones are toys. Proper sound meters not only need to be calibrated, they also need to be frequency weighted because the same sound pressure is perceived as different volume at different frequencies. The phone sound meter apps I've seen are all flat.
--Ian
No i haven't. I can mess with that, but no amount of soundproofing is going to make what is currently happening acceptable. Looking for data points/experiences with similar/anecdotes, not solutions at the moment.
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07-04-2018, 02:19 PM
#35
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My father(in his 60s) has a VVT swapped NA6. Full poly suspension/diff bushings with mazdacomp engine mounts, RB header and unresonated power pulse muffler w/poly hangers. Magnaflow hi-flow cat.
I find it slightly quiet unless youre flooring it. My father doesnt mind it and the wind noise bothers her more than the exhaust(top down for that). Ill try to get some DB readings.
(also last year I can the same set up on my car but MSM swap(w/o turbo) and AWR engine mounts + FM 2.5" turbo exhaust. That was louder but not really drone-y or unbearable)
I find it slightly quiet unless youre flooring it. My father doesnt mind it and the wind noise bothers her more than the exhaust(top down for that). Ill try to get some DB readings.
(also last year I can the same set up on my car but MSM swap(w/o turbo) and AWR engine mounts + FM 2.5" turbo exhaust. That was louder but not really drone-y or unbearable)
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07-04-2018, 04:14 PM
#36
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Location: Munich
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My car is like concealer's. NA6 with VVT and 6758. Full 3" exhaust with resonator, cat and end can. The drone is driving me nuts. I have pool noodles underneath the parcel shelf and around the fuel pump/tank cover void. Full carpet. Even with the opt full of luggage it will drone like hell. From the outside my exhaust sounds sporty but not overly obtrusive. The intake noise and spool is certainly louder.
I'll try the big *** MT Magnaflow muffler next.
I'll try the big *** MT Magnaflow muffler next.
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07-04-2018, 08:15 PM
#37
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My car is like concealer's. NA6 with VVT and 6758. Full 3" exhaust with resonator, cat and end can. The drone is driving me nuts. I have pool noodles underneath the parcel shelf and around the fuel pump/tank cover void. Full carpet. Even with the opt full of luggage it will drone like hell. From the outside my exhaust sounds sporty but not overly obtrusive. The intake noise and spool is certainly louder.
I'll try the big *** MT Magnaflow muffler next.
I'll try the big *** MT Magnaflow muffler next.
I have full 3" catless, no resonator, only the muffler and its VERY quiet. Almost stock quiet. Just deeper sounding
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