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Expert
Posts: 1730
   
Location: Michigan | I want that sound... I mean THAT real low bass note shake that only came from that engine in combination with the muffler system attached to it.
Anyone got Youtube links that I can reference and a part number / manufacturer of the muffler they used to get it? |
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Expert 5K+
Posts: 7393
 
Location: northern germany | use tailpipes behind the axle bends as BIG and long as possible. i'm using, iirc, 4" tailpipes (hidden,with oe style turn downs) and the sound with shortened (perforated core, not louvered) glasspacks is killing me at wot. i bet this was the most expensive modification i ever did 
Edited by 1960fury 2014-11-14 4:22 PM
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Elite Veteran
Posts: 888
Location: Peoples Republic of Oregon | I can't offer any youtube links but think back to the factory muscle cars and the exhaust on those. For me, the 340-383-440 cars all made 'music' is stock form...trouble is, we don't all like the same music.... |
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Expert
Posts: 1730
Location: Michigan | so are these the OEM style. ? I don't have the books to verify. http://www.ebay.com/itm/NOS-1956-59-PLYMOUTH-DODGE-8-CYLINDER-RT-OR...
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Expert
Posts: 1506
Location: Colo Spgs | Hola Mark
The Exhaust Manifold opening Diameter at Its Exit is 2 inch's - for your engine. From any NAPA purchase their #22-599 Muffler. The muffler's two In-let Diameter Sizing
is the same as your Exhaust Manifold Diameter. Inform any local Neighbor Muffler Shop that you want The Manifold to Muffler Pipe to be this size ( this diameter and design for your engine/ car is not in their books ).
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This unit is A OEM Replacement Item and is quality spec'd for this. It is made by Walker and re-branded/ packaged for NAPA.
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It will show on a Dyno the same power spec's as what a proper designed Duel Exhaust does - at a lower cost to you.
After it is fully installed with The Tail Pipe Exiting as per it should ---and you feel as if your car now sounds as a "Logging truck" - have the same Muffler Shop
install one of their Resonators --- behind it.
Rodger & Gabby
COS
Edited by Rodger 2014-11-14 10:13 PM
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Elite Veteran
Posts: 888
Location: Peoples Republic of Oregon | I agree with 1960fury...use bigger pipe than 2".
Just because the manifold has a 2" exit it is just a minor restriction for a very short distance. I'd be using 2¼ minimum and 2½ would be better.
Use the same diameter inlet on the muffler...back to the muscle car pieces or, if you don't mind the look, something like Flowmasters... |
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Expert
Posts: 1730
Location: Michigan | is this the unit you mean? http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Resonator/...
I already have full dual exhaust. With a hemi motor I don't want to go back to a single.
Edited by Beltran 2014-11-15 6:01 PM
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Expert 5K+
Posts: 7393
Location: northern germany | wayfarer - 2014-11-15 5:40 PM
I agree with 1960fury...use bigger pipe than 2".
Just because the manifold has a 2" exit it is just a minor restriction for a very short distance. I'd be using 2¼ minimum and 2½ would be better.
Use the same diameter inlet on the muffler...back to the muscle car pieces or, if you don't mind the look, something like Flowmasters...
i do not think the 4" tailpipes do anything for performance but they sound awesome. if i go thru a tunnel and floor the throttle my good old 383 at 6k sounds like as if hell breaks loose
i'm using tube headers too but yes the myth floats around that pipes any bigger than the 2" stock ex manifold flange opening can't improve performance. wrong, as a magazine (around 1960) tested. the restrictive factory exhaust systems waste power, even with stock engines. the stock manifold 2" section is very short and in fact the 2" restriction can act as a "valve" that can create a vacuum towards the combustion chambers to help exhaust scavenging if you run bigger pipes directly behind the manifold.
Edited by 1960fury 2014-11-16 8:30 AM
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Expert
Posts: 1506
Location: Colo Spgs | Hola Yo'll
The Duel In-let and single out-let mufflers were first used by Dodges before 1965 and are now used by every vehicle maker in the world. It is a way to lower the product cost -
while having enhanced power.
Please look at a diameter of a era Exhaust Pipe used by MoPar. It is 1 inch and something. Only the leading part is "Flared/ Stretched" to 2 inches. The lil 1 inch and something
diameter is this sizing to the muffler's in-let.
Look into what is called "Lazy Air" with Automotive Exhaust System's. What it is and what it does to your power. Connect this with a vehicle engine that is being used on your local
Hwy's and Street's --- Not NASCAR and etc.
Rodger & Gabby
Colo Spgs |
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Expert 5K+
Posts: 5139
Location: cornpatch county, Southwest IOA | Here is what I have found - on three different cars. I always liked the sound of a full size 63-64 Chevy Impala. A pleasing low-mellow tone. Short glass packs are to harsh for me. I used 2" exhaust pipe, the longest glass packs I could find, and mount the mufflers as far forward as you can. The difference is in the long tail pipes. On my 56 Chrysler with 354 Hemi---quiet night- between two retaining walls- slow cruising with a uphill grade so the engine is pulling a little bit- no sound better---Night prowler
On my 64 Dodge big block, I wanted a low deep rumble with a bit of echo at idle speed My ex manifolds are 2 1/2" with 2 1/2" exhaust pipe into Flowmaster Super 44's--stock location and 2" tailpipe., I got the idle sound I wanted but don't know how it will sound under acceleration or highway speed. I only hope it doesn't "drone".....................MO |
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Expert 5K+
Posts: 5139
Location: cornpatch county, Southwest IOA | BTW I also found that with very little restriction ( a foot of exhaust pipe on each ex man.) The engine had no torque when letting out the clutch from a stop. Unless I gave it more throttle. After I got the exh. system on, I could take off from a stop with no throttle. Much better driveability.....................MO |
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Expert
Posts: 1730
Location: Michigan | Thanks for the feedback guys. I appreciate the experience. Steve this is the sound I am trying to achieve as well. I have borla's on the car right now. They are mounted right before the rear wheels. They sound good... but not low enough. I picked up a couple of those IPC units on eBay. I have only ever seen them a hand full of times. I didn't want to pass them up again. I will keep investigating this and hope my purchase turns out to be a good one. Otherwise I can always sell them. |
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Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!
Posts: 19146
Location: bishop, ca | There's always hope of scoring a set of the MoPar Sono-4X mufflers.
Heaven... |
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Exhaust note question
