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Techical Discussions => Tech- - Engine => Topic started by: R. Dave Carr on May 07, 2008, 10:36:44 AM

Title: Exhaust pipe size
Post by: R. Dave Carr on May 07, 2008, 10:36:44 AM
Guys, putting dual exhaust on the car tomorrow, with super turbo mufflers.  Stock 383 with 4 barrell.  What size pipe do you reccomend?carrman2008-05-07 15:40:05
Title: Exhaust pipe size
Post by: Johnny D. on May 07, 2008, 11:19:52 AM
2.5 but i like it louder....

otherwise 2.25 easier on the nieghboors when you come home at night.


Title: Exhaust pipe size
Post by: Brian on May 07, 2008, 11:27:06 AM
Well stock would be 2 1/4 pipe but I'd go 2 1/2.  Then you have more then enough "growing" room if you decide to upgrade the motor in the future.
 
I'm going 2 1/2 dual with super turbo's on my 440 in the wagon next week hopefuly.
 
Pics pics pics when done....(http://www.moparfins.com/forum/smileys/smiley2.gif)(http://www.moparfins.com/forum/smileys/smiley4.gif)
Title: Exhaust pipe size
Post by: R. Dave Carr on May 07, 2008, 11:32:20 AM
With the price of gas, that 383 is staying stock..... 
Title: Exhaust pipe size
Post by: Steve on May 07, 2008, 11:32:52 AM
2 1/2 is good.  Have them put in an H-Pipe too.  2 1/4 will fit better though.  You'd be amazed what that 1/4 inch can do either way.
 
The H Pipe will give you a few more ponies and has a better sound to it, without it being loud.  I call them Sweet Harmonics.
 
POLARACO2008-05-07 16:33:55
Title: Exhaust pipe size
Post by: R. Dave Carr on May 07, 2008, 11:34:41 AM
Was going to do H-pipe later, but I would up getting more money than I thought I would from unused vacation time.  I can do the H-pipe now.....(http://www.moparfins.com/forum/smileys/smiley1.gif)
Title: Exhaust pipe size
Post by: Leaburn Patey on May 07, 2008, 05:07:28 PM
I run 2-1/2 with H-pipe and Dynomax Super Turbo as part of the complete TTi C body exhaust package.
The best money I ever spent  on my car.
I  posted elsewhere  the  linked  sound bits.
The H pipe evens out the pulses and actually quiets it down.
Plus,as mentioned,also good for a few ponies.
I gained some torque with it as well.
Engine temps dropped and MPG improved.
Steve and Mobby drove my car when I was visiting so they can add their two cents..
Title: Exhaust pipe size
Post by: Steve on May 07, 2008, 05:15:30 PM
I see cars that sound just like that all the time here.  They kinda sound like Chain saws.
Title: Exhaust pipe size
Post by: R. Dave Carr on May 07, 2008, 05:45:16 PM
Lea, your experiences are what convinced me this is how I need to go.
 
 
Title: Exhaust pipe size
Post by: Leaburn Patey on May 07, 2008, 06:11:48 PM
(http://www.moparfins.com/forum/smileys/smiley20.gif) Thanks..
Title: Exhaust pipe size
Post by: Steve on May 07, 2008, 06:15:45 PM
All kidding aside. . .
 
The important feature is the H Pipe for what Lea and I have accomplished.  When I researched the pipe sizes for Polaraco, I could have gone with 2" or 2 1/4.  I chose the latter and glad I did.  The 383 single exhaust is 2 1/4.   Imagine what two of those will do for you.
 
I just use plain street $24.95 mufflers.  Stock, fairly quiet inside, but nasty sounding when you hear it go down the street.  I can't see these Thrust Masters and expensive mufflers at all.  They're too loud to start with.  Leas wasn't intrusive.
 
So to answer the question
I suggest 2 1/2 with the H Pipe
Title: Exhaust pipe size
Post by: Johnny D. on May 07, 2008, 07:50:18 PM
hey i got one right... yea for me...

Title: Exhaust pipe size
Post by: R. Dave Carr on May 08, 2008, 07:40:50 PM
Well, the exhaust is done.  Went with 2.25 as the muffler guy said it would have rattled with 2.5 at the rear end.  Much quieter than I counted on.  He told me not to worry, as the turbo mufflers are run for a while, they will get a little bit louder.  Good  sound overall, but my idle is a bit rougher than I remember now.  only $395 for the whole job, he did everything from the manifolds back.  He also mentioned "your car sure took a lot of pipe!"
Title: Exhaust pipe size
Post by: Johnny D. on May 08, 2008, 07:42:52 PM
sheesh thats light on the cash end... a reglar muffler shop by me wants like at least 600 bucks... good deal... they always get louder later.