Doug's side pipes insert noise level
Thread Starter
Pro
Joined: Jun 2021
Posts: 505
Likes: 230
Doug's side pipes insert noise level
I have doug's side pipes with the max-flo inserts, I was curious of the nose level so I put a decibel meter app on my phone.
383 -11.3:1, XR282 cam
20" from the exit
1000 RPM IDLE 99 DB
2000 RPM 120 DB
So now I know. I live in the sticks, so it's not a big deal, but it's probably loud enough to annoy your neighbors if you live in town. Has anyone test the other inserts available like the STS spiral baffles?
383 -11.3:1, XR282 cam
20" from the exit
1000 RPM IDLE 99 DB
2000 RPM 120 DB
So now I know. I live in the sticks, so it's not a big deal, but it's probably loud enough to annoy your neighbors if you live in town. Has anyone test the other inserts available like the STS spiral baffles?
Pro
Joined: Oct 2017
Posts: 571
Likes: 207
I have doug's side pipes with the max-flo inserts, I was curious of the nose level so I put a decibel meter app on my phone.
383 -11.3:1, XR282 cam
20" from the exit
1000 RPM IDLE 99 DB
2000 RPM 120 DB
So now I know. I live in the sticks, so it's not a big deal, but it's probably loud enough to annoy your neighbors if you live in town. Has anyone test the other inserts available like the STS spiral baffles?
383 -11.3:1, XR282 cam
20" from the exit
1000 RPM IDLE 99 DB
2000 RPM 120 DB
So now I know. I live in the sticks, so it's not a big deal, but it's probably loud enough to annoy your neighbors if you live in town. Has anyone test the other inserts available like the STS spiral baffles?
They definitely get rowdy as the rpm increases.
My combo is 421 stroker, Comp 236/242 - 110 cam.
Last edited by TorchZ51; Aug 15, 2021 at 09:57 PM.
Safety Car
Joined: Sep 2005
Posts: 4,226
Likes: 643
From: Orange County Ca
I have the high flow (middle picture) in my 69 427/390 mostly stock car. They are pretty loud. I thought I might be losing some hp due to the inside pipe being small. I went to the max flow and I THINK I could feel the increased hp.
But, just too loud. Harley loud. I was afraid that I was going to get a ticket every time I drove it. 1 neighbor did complain. I went back to the high flow mufflers as the best compromise.
But, just too loud. Harley loud. I was afraid that I was going to get a ticket every time I drove it. 1 neighbor did complain. I went back to the high flow mufflers as the best compromise.
Burning Brakes
Joined: Aug 2016
Posts: 1,000
Likes: 283
From: New York
Lol you guys must have terrible hearing...I had the middle Dougs and I got rid of the side pipes all together and went full exhaust with some Borlas Atak. Way to loud to enjoy on any drive longer than 30 mins. They look awesome and are great for around town driving but any distance driving....no way.
Safety Car
Joined: Dec 2012
Posts: 3,974
Likes: 673
I went with the max flow because I really like the sound of a nice engine but if it is way to loud I can always go to the middle one, from what Doug's headers told me was that they are no longer making the loudest version.
Instructor
Joined: Jun 2015
Posts: 193
Likes: 34
From: Ohio
I had the middle mufflers from Doug's in my sidepipes and I thought they sounded perfect. My current car with Hooker long tube headers and dual exhausts with turbo mufflers doesn't sound anywhere as nice to me.
Last edited by Heus; Aug 17, 2021 at 07:45 AM.
Melting Slicks
Joined: Jul 2019
Posts: 2,297
Likes: 2,016
From: MA/NH Seacoast
I'm building a 6.0ls, 10.0:1 CR, 233/239 .615 111lsa cam, which will be breathing through Hooker 4" sidepipes. I'm cutting the sbc flange off the headers and welding on the LS flanges.
I have basically the same setup in another car, running through a full 2.5" exhaust and Flowmaster 40s, and it's pretty damn loud. Needless to say it should be pretty rad through sidepipes.
I have basically the same setup in another car, running through a full 2.5" exhaust and Flowmaster 40s, and it's pretty damn loud. Needless to say it should be pretty rad through sidepipes.
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