Re: Straight Through Type Mufflers On Street
[Re: dan9]
#1591942
03/14/14 12:24 PM
03/14/14 12:24 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Has anyone tried the chambered exhaust? I am curious what they sound like for a 340. They come in different sizes and lengths.
I had a 340 Swinger w/ a TTi 3" X-pipe system and 3 chanmber flowmasters.. It sounded like a v8 w/ flowmasters.
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Re: Straight Through Type Mufflers On Street
[Re: dan9]
#1591944
03/14/14 01:23 PM
03/14/14 01:23 PM
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Joined: Aug 2012
Posts: 1,574 Lakeland FL
floridian
pro stock
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pro stock
Joined: Aug 2012
Posts: 1,574
Lakeland FL
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Quote:
So they weren't horrible and cheap sounding?
Welll its all in the perspective of ones outlook.. I remember these horrible "crackle pipe mufflers" from the day.. Thought they were outlawed in the 70's.. We can only hope...
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Re: Straight Through Type Mufflers On Street
[Re: dan9]
#1591947
03/14/14 10:30 PM
03/14/14 10:30 PM
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Joined: Dec 2007
Posts: 18,165 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,165
Mass
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Quote:
Has anyone tried the chambered exhaust? I am curious what they sound like for a 340. They come in different sizes and lengths.
I've been running chambered exhaust for quite a few years, I wouldn't run anything else but, even on stock HP manifols along with a H pipe 2.5 pipes out the rear, factory tips, no drone, or rumble/pops, even on high RPM downshifts, for street use I recommend you run them with the internal louvers facing the engine to increase back pressue (basically the chambered tube in reverse flow)...run the louvers towards the rear if full flow is your goal along with optimum noise seriously though reverse flow is best for street use...I like to run the 30" length models
mike
Below is a link for Classicchambered. com, Moparts Member "Sunroofcuda" manufacturers them. http://youtu.be/8V1M2-y8oiA
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Re: Straight Through Type Mufflers On Street
[Re: DAYCLONA]
#1591948
03/15/14 12:27 AM
03/15/14 12:27 AM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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Drone = Flowcrappers!!
I ran 2.5" HOOKER Aero Chambers on my 340-6 in my 81 Shorty for years. It sounded great and got lots of good compliments on the sound.
I am truckless..
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Re: Straight Through Type Mufflers On Street
[Re: dan9]
#1591949
03/15/14 03:19 PM
03/15/14 03:19 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
So they weren't horrible and cheap sounding?
they sound like flowmasters, they weren't too awful no drone. But it also has a lot to do with your build. Start adding compression and cam and stuf gets louder especailly w. smaller 2.5" exhaust.
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Re: Straight Through Type Mufflers On Street
[Re: dan9]
#1591952
04/21/14 04:11 PM
04/21/14 04:11 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,446
Indiana
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I have figured out that I want to run the TTi 2.5" X-pipe dual exhaust (with muffler eliminator pipes in place of where you would order mufflers under the rear seats) bolted onto my existing TTi headers/2.5" collectors. This gets me from my existing 2.5" collectors all the way to the rear bumper and I can add the Accurate SS 2.5" R/T tips. Then I can measure the straight section of pipe beside the gas tank and see which length of muffler would best fit the area.
I am thinking that If I use the X-pipe, I might be able to get away with the Magnaflow 6" diameter SS mufflers (14" or 18" long) beside the gas tank (in place of the existing OE style 7" x 18" mufflers). Then if this is still too loud for street driving, then add the Magnaflow 4" diameter SS mufflers under the rear seat (acting resonator)where TTi places the muffler eliminator pipes (18.5" long).
This should give me the straight through 2.5" exhaust and quiet it down for the street while using SS mufflers and SS R/T tips.
Thanks for all of the replies.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Straight Through Type Mufflers On Street
[Re: 451Mopar]
#1591954
04/22/14 08:34 AM
04/22/14 08:34 AM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,446
Indiana
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The elimination tube is TTi's design. They just call them ""2.5" x 18.5" MUFFLER ELIMINATOR PIPES w/ ID SWAGE ENDS"". So the exhaust should bolt up just like their muffler was in place.
My current OE mufflers are 7" diameter and they have offset-inside/center 2-1/4" pipes with the stock R/T tips. I am using them as a reference and I have take dimensions from the center line of those mufflers to the frame and the tank. Referencing their online pictures for Ebody tail pipes (attached) and knowing that other members have welded in 4" diameter mufflers in the stock position, I am hoping to stuff as big of a muffler in there as possible both diameter and length. I think a 6" diameter will work but if not, then Magnaflow makes a 5" diameter too. Once I have the TTi muffler elimination 2.5" exhaust in place (with the R/T tips installed), that should show me exactly the muffler space required. Then is it just calling up my local Oreillys and having them order me a set of that size. If the noise is too much for my streeter, then that muffler elimination tube just might get a shorter 4" muffler mounted to it to help as a resonator.
Thanks for your reply.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Straight Through Type Mufflers On Street
[Re: davenc]
#1591957
04/23/14 08:51 AM
04/23/14 08:51 AM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,446
Indiana
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Dave, Thank you very much for the picture. That is the first picture that I have found showing the MF round mufflers beside the tank. I am surprised that you were able fit a 7x14 in there! Once I have my exhaust purchased and installed, I will cram the largest one in there because I am hoping to not have to use a resonator under the seat.
Do you have another angle of the 7x14 in there? How close is it to the bend on the over-axle pipe? Have you tried your exhaust with only the round mufflers? If not, is it loud now with the set of MF's on both sides? Thanks allot!!
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Straight Through Type Mufflers On Street
[Re: Jeff_383]
#1591959
04/23/14 10:23 AM
04/23/14 10:23 AM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,446
Indiana
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I do not want mufflers under the rear seat due to ground clearance. We have speed bumps around our area and I don't want to have to worry about them. I know the factory did this and my car used to have the resonators under the rear seat. But I want to see if I can put a large enough round muffler (thru style) beside the tank without having to add the resonator/muffler under the seat. This is why I will go with the x-pipe to see if that helps bring down the noise too. Worse case and it is too loud, then I will add a 3.5/4" round muffler under the seat.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Straight Through Type Mufflers On Street
[Re: dan9]
#1591960
04/23/14 02:15 PM
04/23/14 02:15 PM
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Joined: Jul 2010
Posts: 295 Vallejo, CA
ditchdrift
enthusiast
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enthusiast
Joined: Jul 2010
Posts: 295
Vallejo, CA
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Quote:
Has anyone tried the chambered exhaust? I am curious what they sound like for a 340. They come in different sizes and lengths.
heres my 340 with summit chambered street/strip mufflers
www.youtube.com/watch?v=F5LC2IuOdtM
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Re: Straight Through Type Mufflers On Street
[Re: YO7_A66]
#1591961
04/24/14 12:05 AM
04/24/14 12:05 AM
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Joined: May 2005
Posts: 598 NC, USA
davenc
mopar
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mopar
Joined: May 2005
Posts: 598
NC, USA
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Y07_A66:
The few photos I have right now are from the rear of the car. I hope to get the car out this weekend, and can snap a few other pics from showing the area between the axle and the tank.
Prior to adding the round MFs, only the oval Ultraflows were present. Everyone's view of "loud" seems to be different to me, and as you know there are many factors that will affect the sound level. My car has full 3", an X-pipe, headers, 400/470, and cam of [Email]248@050.[/Email] My tolerance has gotten lower as I have gotten older, and originally I felt the car was "loud" (as in the family knowing I was home before I even pulled into the driveway). Even now, you can hear it while idling in the driveway while inside the house. You have smaller pipes, less displacement, and less camming so you might be OK, depending on your tolerance. A straight thru muff isn't very quiet in my opinion!
The additional of the MFs did reduce the noise by about 10dB at some frequencies in some positions. My car was actually loudest by the rear wheel wells. Do you have a smart phone? If so, look for the "FrequenSee" app. I'll attach some before and after plots so you can see the impact. Here is the difference from the driver's side. First pic is UF only, second is UF + MF.
Last edited by davenc; 04/25/14 12:23 AM.
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