GalantVR4.org The Mitsubishi Galant VR-4 Forum
Galant VR-4 Forums » Galant VR-4 » General VR4 Discussions » Exhaust - Sound Meter Thread - please post your examples
Previous thread Next thread

Exhaust - Sound Meter Thread - please post your examples


tsitalon1
Member +


Galant VR-4 org Post #: 1116869 posted 04/04/13 07:40 PM     Remind Me!  Send Private Message   Edit Post      
***I'm not sure if a thread like this exists, so if it does, feel free to delete it.***

Hey guys,

This thread will be used to document in-cabin sound levels (Decibels) of exhaust setups.

We will use the android app "Sound Meter" found here: SOUND METER APP

I did not use the calibrate function of the app and please see app manual for phones that cannot register past 80db's.

All sound levels taken from window phone mount in center of dash over dash clock.

Please post your results following my example..

Current exhaust config:
Stock Manifold
Evo316g turbo
Stock O2 housing
Ebay 2.5" to 3" downpipe
Mil spec 3" race cat
generic 3" exhaust
Magnaflow oval muffler

Sound levels with windows closed all sounds (Radio,blower, etc) off.

Car off in quiet driveway = 30db
Idling = 60db
Cruising at 70mph = 75db
3rd gear WOT = ~82db

PLease post your data
While I know these will not be absolutely accurate, I believe we will get a relative comparison...maybe better than listening to youtube video's


Edited by tsitalon1 (04/04/13 07:42 PM)

Posts: 309 | From: Montgomery Al | Member Since: 12/29/10 | IP: (72.177.171.237) | Report this post to a Moderator

matt92vr4
Member ++
474/1000


Galant VR-4 org Post #: 1116882 posted 04/04/13 08:56 PM     Remind Me!  Send Private Message   Edit Post      
Very cool idea, my piping came in today for the exhaust I'm going to make this weekend. I'll post my before and after results. I wish I would have thought of this last week before I threw out my stocker. I wonder what the db's on the stocker are??



474/1000 Summit White
1993 Stealth RT/TT
1995 Montero SR
1998 Montero

Posts: 676 | From: Venice, FL | Member Since: 10/03/10 | IP: (68.56.153.38) | Report this post to a Moderator

Fiascoxl
Member +
740/1000


Galant VR-4 org Post #: 1116896 posted 04/04/13 09:59 PM     Remind Me!  Send Private Message   Edit Post      
Sweet, I will compare my stock exhaust to your data after I get it together this weekend.



92 VR4 #740 Nile Black

Posts: 320 | From: Stuarts Draft, Va | Member Since: 01/26/13 | IP: (70.32.221.8) | Report this post to a Moderator

tsitalon1
Member +


Galant VR-4 org Post #: 1117186 posted 04/07/13 03:58 PM     Remind Me!  Send Private Message   Edit Post      
Bump for data

Posts: 309 | From: Montgomery Al | Member Since: 12/29/10 | IP: (72.177.171.237) | Report this post to a Moderator

matt92vr4
Member ++
474/1000


Galant VR-4 org Post #: 1117202 posted 04/07/13 08:06 PM     Remind Me!  Send Private Message   Edit Post      
I tested mine yesterday in the driveway with downpipe only. Windows up phone near the clock.

Car off: 30db
1000rpm idle: 60db
3000rpm: 55db
5500rpm two step: 62db

I didn't get my exhaust finished. I'll post the after numbers here ASAP.



474/1000 Summit White
1993 Stealth RT/TT
1995 Montero SR
1998 Montero

Posts: 676 | From: Venice, FL | Member Since: 10/03/10 | IP: (68.56.153.38) | Report this post to a Moderator

Fiascoxl
Member +
740/1000


Galant VR-4 org Post #: 1117208 posted 04/07/13 09:40 PM     Remind Me!  Send Private Message   Edit Post      
That db reading seems way to low to me. I would of gotten mine today but I have a fuel leak I need to address.



92 VR4 #740 Nile Black

Posts: 320 | From: Stuarts Draft, Va | Member Since: 01/26/13 | IP: (71.63.12.108) | Report this post to a Moderator

matt92vr4
Member ++
474/1000


Galant VR-4 org Post #: 1117282 posted 04/08/13 10:37 AM     Remind Me!  Send Private Message   Edit Post      
Yeah it does seem low. Maybe because there was no load on the engine.



474/1000 Summit White
1993 Stealth RT/TT
1995 Montero SR
1998 Montero

Posts: 676 | From: Venice, FL | Member Since: 10/03/10 | IP: (184.4.224.174) | Report this post to a Moderator

tsitalon1
Member +


Galant VR-4 org Post #: 1117611 posted 04/10/13 08:46 AM     Remind Me!  Send Private Message   Edit Post      
I would agree, all data should be obtained through normal loads, vice the idling data point.

Posts: 309 | From: Montgomery Al | Member Since: 12/29/10 | IP: (199.10.86.148) | Report this post to a Moderator

matt92vr4
Member ++
474/1000


Galant VR-4 org Post #: 1117995 posted 04/12/13 09:41 AM     Remind Me!  Send Private Message   Edit Post      
OK, finished the exhaust last night and drove it to work this morning. This is a full 3" mandrel bent, no cat, one vibrant muffler. I was pleasantly surprised how quiet it is. Barely louder than my old stocker (with rust small holes). The db app confirms. Windows up, phone near clock.

car off: 30db
car idle: 60db
45mph cruise: 62db
70mph cruise: 62db
3rd gear WOT to redline pull: 64db

I think putting this muffler on will solve your problem.
Vibrant Muffler I used



474/1000 Summit White
1993 Stealth RT/TT
1995 Montero SR
1998 Montero

Posts: 676 | From: Venice, FL | Member Since: 10/03/10 | IP: (184.4.224.174) | Report this post to a Moderator

matt92vr4
Member ++
474/1000


Galant VR-4 org Post #: 1118040 posted 04/12/13 12:45 PM     Remind Me!  Send Private Message   Edit Post      
HP plays a huge roll in WOT db's. My car does not have a lot of HP. I have not had it on the dyno, but it runs a [email protected] at 15psi. s16g turbo. I hope to increase my WOT db's in the coming months



474/1000 Summit White
1993 Stealth RT/TT
1995 Montero SR
1998 Montero

Posts: 676 | From: Venice, FL | Member Since: 10/03/10 | IP: (184.4.224.174) | Report this post to a Moderator

tsitalon1
Member +


Galant VR-4 org Post #: 1118049 posted 04/12/13 02:14 PM     Remind Me!  Send Private Message   Edit Post      
Interesting results, what boost levels are you at?

I'm at 21-22 on my evo316g, tuned somewhat rich since I'm still on stock IC.

Posts: 309 | From: Montgomery Al | Member Since: 12/29/10 | IP: (199.10.86.148) | Report this post to a Moderator

matt92vr4
Member ++
474/1000


Galant VR-4 org Post #: 1118056 posted 04/12/13 03:06 PM     Remind Me!  Send Private Message   Edit Post      
I'm at 15psi. 22psi will increase my db's. I hope to be there soon. I'll post the results at different boost levels.



474/1000 Summit White
1993 Stealth RT/TT
1995 Montero SR
1998 Montero

Posts: 676 | From: Venice, FL | Member Since: 10/03/10 | IP: (184.4.224.174) | Report this post to a Moderator

quato
Member
32/1000


Galant VR-4 org Post #: 1118432 posted 04/15/13 05:23 PM     Remind Me!  Send Private Message   Edit Post      
I measured in at low 80's whether idling or anything else.

Yes, my car is obnoxious

Posts: 230 | From: San Antonio, TX | Member Since: 01/31/12 | IP: (132.3.45.80) | Report this post to a Moderator

cheekychimp Galant VR4.org Moderator
Director of Housing and Urban Development, and carbon/kevlar balls


Galant VR-4 org Post #: 1118497 posted 04/16/13 04:04 AM     Remind Me!  Send Private Message   Edit Post      
I just tested that app in my office and the noise of the a/c registers 80db!

I thought my exhaust was quiet but judging from this it must be LOUD.



Getting old sucks ... but it sure beats the alternative !!!

Posts: 7333 | From: East Sussex, U.K. | Member Since: 04/19/04 | IP: (202.140.78.231) | Report this post to a Moderator

tsitalon1
Member +


Galant VR-4 org Post #: 1118511 posted 04/16/13 08:27 AM     Remind Me!  Send Private Message   Edit Post      
@Cheeky, That's strange, I only get 30db or so in a quiet room.

You must have a vented wastegate on that AC unit

Maybe your phone's mic is more sensitive??? Have another phone to test with?


Edited by tsitalon1 (04/16/13 08:28 AM)

Posts: 309 | From: Montgomery Al | Member Since: 12/29/10 | IP: (199.10.86.148) | Report this post to a Moderator

matt92vr4
Member ++
474/1000


Galant VR-4 org Post #: 1118519 posted 04/16/13 09:34 AM     Remind Me!  Send Private Message   Edit Post      
I think you have to go to a quiet room and calibrate it down to 30db.



474/1000 Summit White
1993 Stealth RT/TT
1995 Montero SR
1998 Montero

Posts: 676 | From: Venice, FL | Member Since: 10/03/10 | IP: (184.4.224.174) | Report this post to a Moderator

5OF2k
Member ++
5/2000


Galant VR-4 org Post #: 1118537 posted 04/16/13 12:47 PM     Remind Me!  Send Private Message   Edit Post      
I tried this on my iphone yesterday, and my phone wouldnt stay in the holder. I need rubber bands lol.



1993 Talon TSI, FPgreen DD
1957 VW Beetle Sedan Deluxe
1997 Civic EX, B18c/5lug swapped
2002 Yamaha Fz-1
Looking for another GVR4, or 5/2000...PM!

Posts: 664 | From: colorado springs, colorado | Member Since: 03/28/12 | IP: (166.137.209.24) | Report this post to a Moderator

EHmotorsports
Capt Fabbin Stabbin
1865/2000


Galant VR-4 org Post #: 1118569 posted 04/16/13 04:12 PM     Remind Me!  Send Private Message   Edit Post      
E316g
2g ported manifold
2 1/2" dp
3"exhaust
Magna flow muffler 14835
No sound deadening with carpet.

Car off . 30-32Db
Idle 60-63Db
Cruise 80-84Db
Wot. 90-92Db



click


Edited by EHmotorsports (04/16/13 05:07 PM)

Posts: 1278 | From: Beaverton | Member Since: 09/26/12 | IP: (166.147.88.40) | Report this post to a Moderator

tsitalon1
Member +


Galant VR-4 org Post #: 1118570 posted 04/16/13 04:16 PM     Remind Me!  Send Private Message   Edit Post      
Very interesting, that's very close to my setup and you're 10db more than me at cruise and WOT.

Do you know which Magnaflow you have? What phone are you using?

I'll check my magnaflow for model # if I can.

Posts: 309 | From: Montgomery Al | Member Since: 12/29/10 | IP: (199.10.86.148) | Report this post to a Moderator

EHmotorsports
Capt Fabbin Stabbin
1865/2000


Galant VR-4 org Post #: 1118573 posted 04/16/13 04:57 PM     Remind Me!  Send Private Message   Edit Post      
I will add it into my original post but I have all sound deadening taken out. With carpets still in. Might explaine the difference.
I'm using an old iPhone 4.

Magnaflow part number 14835
It's also about a year old so they will get louder with age.



click


Edited by EHmotorsports (04/16/13 05:06 PM)

Posts: 1278 | From: Beaverton | Member Since: 09/26/12 | IP: (71.59.140.123) | Report this post to a Moderator

cheekychimp Galant VR4.org Moderator
Director of Housing and Urban Development, and carbon/kevlar balls


Galant VR-4 org Post #: 1118639 posted 04/16/13 11:44 PM     Remind Me!  Send Private Message   Edit Post      
Well I figured you could be right about the phone (it's a Korean model that's not in the supported list). So I switched to my Galaxy S3 but I still get a rock solid 60dB in the office with no-one talking and only the sound of the central A/C. Admittedly the fan is loud compared to a lot of A/C systems. It flits between the 50dB "Quiet office, Rainfall" and 60dB "Normal Conversation at 3ft." index and it does jump to 70dB when I put a ringing cell phone next to it, so it may not be far off.

But without meaning to put a damper on this, I think the calibration of the phones/meter app and the difference in the phones used could potentially skew the data enough to detract from what you are attempting to do.

I saw in a post above that you queried a difference of 10dB from a setup similar to your own but you also said replying to my post that you get 30dB reading in a quiet room. I guess "quiet" is a pretty vague term but looking at the index on the app itself 50dB is the average reading for a quiet office and I get a rock solid 51-52dB out near the lobby away from the central A/C and fan noise.

I'll give this a try on my setup and see how it compares with yours.

I'll also put it next to the Suzuki DRZ400 with the MRD exhaust. I'm sure it will clear 110dB. We opened it up in the shop the other day and the exhaust bounced off the wall behind it and knocked parts of the shelf in front of it


Quoting tsitalon1:

@Cheeky, That's strange, I only get 30db or so in a quiet room.

You must have a vented wastegate on that AC unit

Maybe your phone's mic is more sensitive??? Have another phone to test with?





Getting old sucks ... but it sure beats the alternative !!!


Edited by cheekychimp (04/16/13 11:52 PM)

Posts: 7333 | From: East Sussex, U.K. | Member Since: 04/19/04 | IP: (202.140.78.214) | Report this post to a Moderator

tsitalon1
Member +


Galant VR-4 org Post #: 1118668 posted 04/17/13 08:32 AM     Remind Me!  Send Private Message   Edit Post      
Yeah, I know the variables are many and the accuracy might be as good as we hope, but I'm hoping it's better than listening to youtube video's with camera's recording at ground levels.

How about in your home by yourself with nothing making noise...except the AC? Should be closer to 30db.

Posts: 309 | From: Montgomery Al | Member Since: 12/29/10 | IP: (199.10.86.148) | Report this post to a Moderator

EHmotorsports
Capt Fabbin Stabbin
1865/2000


Galant VR-4 org Post #: 1118674 posted 04/17/13 09:58 AM     Remind Me!  Send Private Message   Edit Post      
I had to calibrate mine down to 30 db in a home with nothing on or running. It was 40db before hand.



click

Posts: 1278 | From: Beaverton | Member Since: 09/26/12 | IP: (24.21.177.159) | Report this post to a Moderator

cheekychimp Galant VR4.org Moderator
Director of Housing and Urban Development, and carbon/kevlar balls


Galant VR-4 org Post #: 1118864 posted 04/18/13 05:40 AM     Remind Me!  Send Private Message   Edit Post      
You're right! It is, so it's probably not far off.

In any event using the same app to measure any changes in a setup should still give useful results. Even if the two readings are not 100% accurate themselves, the difference between them should be an accurate indication of how much the sound has increased or decreased.

Quoting tsitalon1:

Yeah, I know the variables are many and the accuracy might be as good as we hope, but I'm hoping it's better than listening to youtube video's with camera's recording at ground levels.

How about in your home by yourself with nothing making noise...except the AC? Should be closer to 30db.





Getting old sucks ... but it sure beats the alternative !!!

Posts: 7333 | From: East Sussex, U.K. | Member Since: 04/19/04 | IP: (202.140.108.116) | Report this post to a Moderator

cheekychimp Galant VR4.org Moderator
Director of Housing and Urban Development, and carbon/kevlar balls


Galant VR-4 org Post #: 1120014 posted 04/25/13 11:12 AM     Remind Me!  Send Private Message   Edit Post   
Current exhaust config:
EVOIII Manifold
Big 16g turbo
EVO III O2 housing
Unknown 2.5" downpipe
JDM "Jasma" exhaust
JDM muffler (I'll try to get more details but it's pouring with rain right now!)

Sound levels with windows closed all sounds (Radio,blower, etc) off.

Car off in quiet driveway = 30db
Idling = 61db
Cruising at 70mph = 77db
3rd gear WOT = 79db



Getting old sucks ... but it sure beats the alternative !!!

Posts: 7333 | From: East Sussex, U.K. | Member Since: 04/19/04 | IP: (202.140.72.52) | Report this post to a Moderator


Pages: 1 | 2
Previous thread Next thread

Extra information
0 registered and 12 anonymous users are browsing this forum.

Galant VR4.org Moderator:  curtis, steve, atc250r, jcgalntvr4-244, cheekychimp, jepherz, Rausch, toybreaker, iceman69510, pot, FlyingEagle 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Thread views: 4741

Rate this thread


News & Events: News | Events
Galant VR-4: Newbies | General VR4 Discussions | Technical Discussions | How To and Info Archive
Marketplace: Parts For Sale | Cars For Sale | Good Guys | Bad Guys
Community: Members' Showcase

Contact Us | Privacy statement GalantVR-4.org

Generated in 0.061 seconds in which 0.026 seconds were spent on a total of 15 queries. Turbo powered.


Hertz's Galant VR-4 Page