We are currently running on the new domain and server: www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Straight through mufflers

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Ladderbar
New Member
New Member
Posts: 28
Joined: Sun Oct 26, 2008 6:46 am
Location: Pittsburgh PA

Re: Straight through mufflers

Post by Ladderbar » Fri Jun 19, 2020 5:16 pm

You need to try Borla's you will like the performance and the way it will run and sound.

F-BIRD'88
Guru
Guru
Posts: 7534
Joined: Tue Mar 27, 2007 6:56 pm
Location: Ontario, Canada

Re: Straight through mufflers

Post by F-BIRD'88 » Fri Jun 19, 2020 6:14 pm

GT50 wrote:
Fri Jun 19, 2020 5:55 am
F-BIRD'88 wrote:
Fri Jun 19, 2020 12:27 am
Have someone else drive the truck so you can evaluate the exhaust tone from outside at a distance...
There is a sweet sounding exhaust , then there is is a exhaust that just pisses every one off, including you eventually..
If the exhaust terminates under the truck VS at the rear bumper it is going to get old quick... The H pipe is a good idea.. I build my own custom mufflers.

Look what Ford did with the late Mustangs..
I took a California Special 6 Speed rag top for a ride .
As soon as you fire it up... Its like " Ya Baby"!!! (Austin Powers) ♪♪♪🇬🇧
Can you show the inside of your custom muffler? If it's not top secret.

You need LEVEL #5 clearance ha ha
Give me a bit and I will dig up a drawing..

F-BIRD'88
Guru
Guru
Posts: 7534
Joined: Tue Mar 27, 2007 6:56 pm
Location: Ontario, Canada

Re: Straight through mufflers

Post by F-BIRD'88 » Fri Jun 19, 2020 6:17 pm

What about the old SONIC TURBO mufflers?

Do they still make those?

F-BIRD'88
Guru
Guru
Posts: 7534
Joined: Tue Mar 27, 2007 6:56 pm
Location: Ontario, Canada

Re: Straight through mufflers

Post by F-BIRD'88 » Fri Jun 19, 2020 6:27 pm

The Sonic Turbo is similar to my custom muffler.
Its not exactly the same but uses similar ideas.
I had not seen the guts of a sonic turbo when I did mine.
I think these are good.. My custom mufflers worked very well..
http://www.studiodino.com/images/muff_box.jpg

F-BIRD'88
Guru
Guru
Posts: 7534
Joined: Tue Mar 27, 2007 6:56 pm
Location: Ontario, Canada

Re: Straight through mufflers

Post by F-BIRD'88 » Fri Jun 19, 2020 6:35 pm

My 88 Firebird had a pair of my custom built mufflers 2.5" in out


Had a aggressive idle but nicer and quieter than flowmasters. Not over the top when @Wot either..
Same drag perf as open headers. Actually just a hair quicker.

Best with headphones

tjs44
HotPass
HotPass
Posts: 592
Joined: Thu Jul 07, 2005 2:30 pm
Location: long beach.ca

Re: Straight through mufflers

Post by tjs44 » Fri Jun 19, 2020 7:42 pm

on both sizes of STs the drone was at 1900-to 2100ish.None up to it and none after it.My car has a TKO and that is where I drive it on the highway and in 4th at 2000 on city streets!The 14in was 86 decibels at 2000 and the 18s were 84.I now have a set of just non performance 18s and they are 82.Im might try the HPs and if they suck I might change my 3.31s to like 3.55s to keep me out of that range.Tom

bob460
Member
Member
Posts: 138
Joined: Thu Sep 26, 2019 6:19 am
Location:

Re: Straight through mufflers

Post by bob460 » Fri Jun 19, 2020 9:57 pm


User avatar
MadBill
HotPass
HotPass
Posts: 14671
Joined: Tue Nov 15, 2005 10:41 am
Location: The Great White North

Re: Straight through mufflers

Post by MadBill » Fri Jun 19, 2020 11:31 pm

I can't imagine those slits sucking up much sound... :shock:
Felix, qui potuit rerum cognscere causas.

Happy is he who can discover the cause of things.

GARY C
HotPass
HotPass
Posts: 5934
Joined: Tue May 14, 2013 10:58 pm
Location:

Re: Straight through mufflers

Post by GARY C » Fri Jun 19, 2020 11:52 pm

Let it breath... :)
You do not have the required permissions to view the files attached to this post.
Please Note!
THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBERS AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!

bob460
Member
Member
Posts: 138
Joined: Thu Sep 26, 2019 6:19 am
Location:

Re: Straight through mufflers

Post by bob460 » Fri Jun 19, 2020 11:54 pm

MadBill wrote:
Fri Jun 19, 2020 11:31 pm
I can't imagine those slits sucking up much sound... :shock:
Dumped at the diff 3 inch with x-pipe......



With tail pipes 3.5 inch with x-pipe......


User avatar
BOOT
Guru
Guru
Posts: 1779
Joined: Fri Apr 09, 2010 6:23 pm
Location: Michigan

Re: Straight through mufflers

Post by BOOT » Sat Jun 20, 2020 6:14 am

If you watch Roadkill then you know of the Muscle Truck, it used larger straight thru mufflers like mention in an earlier post but I think they went a bit larger and it's deff loud!
Channel about my projects https://www.youtube.com/user/BOOT350V

I know as much as I can learn and try to keep an open mind to anything!

If I didn't overthink stuff I wouldn't be on speedtalk!

RevTheory
HotPass
HotPass
Posts: 5346
Joined: Thu Sep 04, 2014 6:45 am
Location:

Re: Straight through mufflers

Post by RevTheory » Sat Jun 20, 2020 7:08 am

A crossover will really pull some snap out of loud mufflers.

Steve K
HotPass
HotPass
Posts: 148
Joined: Sun Oct 12, 2008 11:10 pm
Location: Regina Sk

Re: Straight through mufflers

Post by Steve K » Sat Jun 20, 2020 10:53 am

I run 3" Ultra Flows with no cross over and dumps at the axle on my 79 Camaro with a pretty hot Tunnel Rammed 427 SBC. Its pretty loud. I did run 3" bullets before with a 406 I had in it and that was way beyond what I would consider acceptable as far as noise goes, didn't care much for the tone either. So one morning when I woke up at 4 am wondering what the f*%$k am I going to do now, I figures why not try the bullets in front of the Ultra Flows, so I welded them up and it actually tones it down a bit, as a nice aggressive idle still but less of a cackle to it. On the highway it's pretty quiet till you put your foot in it. I also like the fact that there is no comprise in back pressure with this set up. This is purely a street car.
79 Cmaro, 427 sbc, Tunnel Ram Dual Quad with Eddy carbs, AFR 210 Race Ready heads, 263-272 @.50 Comp solid roller cam, 4.10's and a faceplated Tremec TKO 600.
65 Beaumont 406 tunnel ram faceplated TKO600

Fireonthemountain
Pro
Pro
Posts: 440
Joined: Sat Mar 19, 2016 11:17 pm
Location:

Re: Straight through mufflers

Post by Fireonthemountain » Sat Jun 20, 2020 2:02 pm

The Sonic Turbos were basically now what we call the Dynomax Super Turbos, with both using a noise or energy cancelling bulge, at the end of the intake tube of the mufflers. Both of these mufflers will get a little louder with time/running them over months. Don't forget the Walker Quiet-Flow mufflers, which can have an even longer case than their Dynomax Super Turbos.

For both noise control and increased flow, if someone has room, then more that 2 mufflers can be used in parallel.

Belgian1979
Guru
Guru
Posts: 3981
Joined: Sat Mar 26, 2011 11:34 am
Location: Belgium - Koersel

Re: Straight through mufflers

Post by Belgian1979 » Sat Jun 20, 2020 3:01 pm

I recently installed the inserts in the exhaust tips. I didn't expect a lot but they did reduce sound end drone. Only drawback is that at idle it produces this kinda plopping sound, like it's loose, which it is not.

There was a slight drop in power across the board as I had to retune my efi. But only a couple % so not to bad.

Post Reply