Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

True Dual users... c'mon in!!

Thread Tools
 
Search this Thread
 
Old Dec 11, 2002 | 09:24 AM
  #1  
02bluess's Avatar
Thread Starter
10 Second Club
iTrader: (18)
 
Joined: Aug 2002
Posts: 406
Likes: 0
From: Bloomington, IL
Default True Dual users... c'mon in!!

Ok, want to run something by you guys.

In my current setup, I've got Hooker LT's running through a 3" dual setup (Dr. Gas X-pipe, Dynomax bullets, turndowns before the rear axle).

Sounds awesome outside the car, but I'm getting a TON of resonance and reverb inside the car... literally feels like I'm ripping the car apart. That's no fun...

What I'm thinking about doing is picking up a couple of 3" Dynomax Ultra Flos and installing them in place of the bullets, and then turning the turndowns out slightly so they're not facing directly down.

Do you think this would help with the interior noise??

If so, I'd also like to do this myself, since I can't find any local exhaust shops that'll come close to my car w/out the cats. Where could I pick up an exhaust expander so I could slip fit the new muffler into the existing X-pipe setup, and slip-fit the turndowns onto the mufflers?? I've found a few "tailpipe expanders", but they specifically say that they are not intended for enlarging pipes (just pushing out crimps).

I know this is long, but I'd really appreciate your input.

TIA!
Reply
Old Dec 12, 2002 | 01:12 AM
  #2  
NO F-BDY BS's Avatar
Launching!
 
Joined: Nov 2002
Posts: 207
Likes: 0
From: S'port
Default Re: True Dual users... c'mon in!!

Definitely turn the dumps outwards, this will make a ton of difference. I think that when I finally break down and do a dual setup I will run Jet Hot LTs with 2 12in Dynomax bullets in place of the cats before the X. After the X I was going to use 2 14in Sweet Thunder Mufflers.
Reply
Old Dec 12, 2002 | 05:17 AM
  #3  
Z06PSI's Avatar
TECH Addict
iTrader: (33)
 
Joined: Jul 2002
Posts: 2,647
Likes: 1
From: Thomson, GA
Default Re: True Dual users... c'mon in!!

Exhaust is in the Sig. But my turn downs point 45 degrees outward. Not tearing the car up but really loud. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Reply
Old Dec 12, 2002 | 10:43 PM
  #4  
JxxxOxxxE's Avatar
TECH Apprentice
20 Year Member
iTrader: (1)
 
Joined: Feb 2002
Posts: 347
Likes: 0
From: Harrah, OK
Default Re: True Dual users... c'mon in!!

another option, would be to run them all the way out the back of the car. I have about zero resonance in the car with the duals capped up, now if i open the cutouts (i.e. open headers) it resonates like crazy obviously...

There is a sound clip of mine on the movies of my website in the sig...

<small>[ December 12, 2002, 10:43 PM: Message edited by: JxxxOxxxE ]</small>
Reply
Old Dec 12, 2002 | 11:56 PM
  #5  
deviate42's Avatar
TECH Addict
20 Year Member
iTrader: (2)
 
Joined: Nov 2002
Posts: 2,210
Likes: 0
From: Houston, TX
Default Re: True Dual users... c'mon in!!

I think thats a lil tripppy to put the pipes under the axle. Sounds like an accident waiting to happen.

GL on speed bumps <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />

I like ur design JOE. Thats looks like it would work great. Do you loose alot of airflow by the axle? Those humps look restrictive
Reply
Old Dec 13, 2002 | 12:14 AM
  #6  
Boo Yeah's Avatar
TECH Resident
 
Joined: Aug 2002
Posts: 920
Likes: 0
From: TN
Default Re: True Dual users... c'mon in!!

i am drooling as i dream of my duals...... <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />

<small>[ December 13, 2002, 12:14 AM: Message edited by: Boo Yeah ]</small>
Reply
Old Dec 13, 2002 | 12:48 AM
  #7  
sited12's Avatar
TECH Fanatic
 
Joined: Mar 2002
Posts: 1,390
Likes: 0
From: Chicago Land
Default Re: True Dual users... c'mon in!!

Hey 02bluess. Do you have cats on your set up. If you dont can you please email me the shop that put it up for you. I have all the same parts as you but cant get a shop to touch it without cats. Sited12@yahoo.com
Reply
Old Dec 13, 2002 | 11:17 AM
  #8  
FASST's Avatar
TECH Apprentice
 
Joined: May 2002
Posts: 320
Likes: 0
From: Phoenix, AZ
Default Re: True Dual users... c'mon in!!

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by NO F-BDY BS:
<strong>I think that when I finally break down and do a dual setup I will run Jet Hot LTs with 2 12in Dynomax bullets...</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That'll be a tight fit if it fits at all. The 12" mufflers are actually longer than 12". Your x-pipe needs to be before the drive shaft, and with the exit angles from the LT headers, it's not going to be easy to fit them in without putting in a near 90 degree bend on the way to connecting at the x-pipe.

If you want a less resonant sound, try the Borla XR-1 race mufflers. They flow just as well as the Dynomax, and they sound deeper and more refined than the dynomax. I'm thinking about swapping my dual 12" dynomax out for the Borla. At least go with the 16" dynomax...the 12s are REALLY loud. I don't know what else you have done, but with my 3200rpm stall and H/C it sounds like I'm getting on it around every turn just because the engine revs up. Gets allot of attention...sometimes too much.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Dec 13, 2002 | 02:31 PM
  #9  
ROB'S SS's Avatar
TECH Enthusiast
20 Year Member
 
Joined: Jan 2002
Posts: 585
Likes: 0
From: las vegas, nev
Default Re: True Dual users... c'mon in!!

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 02bluess:
<strong>

If so, I'd also like to do this myself, since I can't find any local exhaust shops that'll come close to my car w/out the cats. Where could I pick up an exhaust expander so I could slip fit the new muffler into the existing X-pipe setup, and slip-fit the turndowns onto the mufflers?? I've found a few "tailpipe expanders", but they specifically say that they are not intended for enlarging pipes (just pushing out crimps).

</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">the mufflers should already be slip fit. at least every muffler i have seen is slip fit.
Reply
Old Dec 13, 2002 | 09:57 PM
  #10  
JxxxOxxxE's Avatar
TECH Apprentice
20 Year Member
iTrader: (1)
 
Joined: Feb 2002
Posts: 347
Likes: 0
From: Harrah, OK
Default Re: True Dual users... c'mon in!!

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SSpeeed:
<strong>
I like ur design JOE. Thats looks like it would work great. Do you loose alot of airflow by the axle? Those humps look restrictive</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well, I dont really think I lose much with it going over the axle. I am going to dyno it tomorrow. Even if i do lose it over the axle, I have the 2 dump right off the headers. I also have the electric cutouts sitting here beside me, i just need to install them...
Reply
Old Dec 14, 2002 | 12:59 AM
  #11  
Serial Thriller's Avatar
On The Tree
 
Joined: Nov 2002
Posts: 183
Likes: 0
From: Shreveport, Louisiana
Default Re: True Dual users... c'mon in!!

FASST, aren't the Borla XR-1s considerably bigger than Dynomax bullets? They sound good, but will they fit?
Reply
Old Dec 14, 2002 | 08:04 PM
  #12  
Matt Sterbator's Avatar
On The Tree
 
Joined: May 2002
Posts: 136
Likes: 0
From: Jax, FL
Default Re: True Dual users... c'mon in!!

You could take the turn downs and actually turn them towrds each other at a 45 degree angle. You get sort of an Xpipe effect, and the sound pulses try to cancel each other out. It actually works pretty well.

My brother has a dual set up with the tail pipes running under the axle. The only way you'd hit speed bumps with them is if you removed the wheels or went over a bump sideways.
Reply
Old Dec 15, 2002 | 08:33 PM
  #13  
CAT3's Avatar
Restricted User
iTrader: (9)
 
Joined: Sep 2002
Posts: 7,603
Likes: 0
From: Sierra Vista, AZ
Default Re: True Dual users... c'mon in!!

Just got my true duals with X pipe installed. Running it from the manifolds and cats to a 90/10 X pipe, and then into 14" bullets, under axle and out the rear. No scrapping or anything like that, still need tips put on, undecided as to which ones right now. Does resonate at 2k-2800 though, not mind boggling, probably cuz i still have cats. True, if you turn the dumps towards eachother it will help kill the drone and sh*t. Good-Luck.
Reply
Old Dec 16, 2002 | 04:25 PM
  #14  
Lane's Avatar
TECH Resident
iTrader: (1)
 
Joined: Nov 2001
Posts: 955
Likes: 0
From: Vertigo
Default Re: True Dual users... c'mon in!!

Pointing the tips in does work. Looks kind of funky, but it works.

I'd like to see some pics of these under axle tail-pipes - I'm very interested in how it looks/clears everything.

Another option is 2.5" Magnaflow Magnapacks. 4" diameter and still straight through. Probably still flow plenty for a bolt on car.
Reply
Old Dec 16, 2002 | 04:31 PM
  #15  
LS1FenixBird99's Avatar
On The Tree
 
Joined: May 2002
Posts: 189
Likes: 0
From: Woodridge, IL
Default Re: True Dual users... c'mon in!!

Hey guys, i got a ?. I have hooker long tube headers and justin suttons x-pipe with borla X-R1's waitin to be welded together. How did you guys connect the x pipe to the hooker headers. Cause i know that the driver side sticks out at an angle and im lost on how to do this. Thanx
Reply
Old Dec 16, 2002 | 06:58 PM
  #16  
Pro Stock John's Avatar
LS1Tech Co-Founder
20 Year Member
Community Influencer
iTrader: (34)
 
Joined: Nov 2001
Posts: 45,329
Likes: 1,767
From: Chicago, IL
Default Re: True Dual users... c'mon in!!

Borla XR1 12" Sportsman mufflers are pretty skinny, that's why I bought a pair of used ones off of 9.1@150mph Renegade class Mustang.

Don't angle the turn downs straight down because it will thrum off the ground if you are trying to keep it quiet. I forget when I had mine done. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Sited I go to Iggy's on Montrose and I ask for Pete and he does all my work or Danny does it. They know my car well. Let me know if you are still wanting these mufflers I will be taking it all apart in January.
Reply
Old Dec 16, 2002 | 07:04 PM
  #17  
sited12's Avatar
TECH Fanatic
 
Joined: Mar 2002
Posts: 1,390
Likes: 0
From: Chicago Land
Default Re: True Dual users... c'mon in!!

Yeah John i will still want the mufflers in January. Im poor right now but after the holidays i will be ready. The borlas are quieter than the dynomax so thats why im going with them.
Reply
Old Dec 17, 2002 | 09:46 AM
  #18  
Pro Stock John's Avatar
LS1Tech Co-Founder
20 Year Member
Community Influencer
iTrader: (34)
 
Joined: Nov 2001
Posts: 45,329
Likes: 1,767
From: Chicago, IL
Default Re: True Dual users... c'mon in!!

A'ight Dan.

Ultraflow mufflers work good, I'd say that the round one I had (4") was loud but not sick loud.
Reply
Old Dec 17, 2002 | 06:18 PM
  #19  
02bluess's Avatar
Thread Starter
10 Second Club
iTrader: (18)
 
Joined: Aug 2002
Posts: 406
Likes: 0
From: Bloomington, IL
Default Re: True Dual users... c'mon in!!

Thanks for the feedback guys.

So, are the XR1's quieter than the Ultraflows?? I'd been thinking that about getting the 4"x9" Ultraflows (I like the Dynaflow sound), but if the XR1's sound pretty deep but are slightly less loud, maybe I should go with them.

Whatcha think??
Reply
Old Dec 17, 2002 | 07:07 PM
  #20  
jacksonsz1998's Avatar
Teching In
 
Joined: Dec 2002
Posts: 45
Likes: 0
From: Oak Forest Illinois
Default Re: True Dual users... c'mon in!!

hey where do you guys order the x-pipes from? and what mufflers do u reccomend with the true dual set up.
Reply




All times are GMT -5. The time now is 12:33 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE