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Dual Pipes

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Old Feb 13, 2003 | 08:56 PM
  #1  
Idlehands's Avatar
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From: Cambridge
Car: 1985 Trans Am
Transmission: 5 Speed
Dual Pipes

can anyone having dual pipes explain their set-up in the back, mine run along either side of the drive shaft with corvette cats in the front but where i run into problems is that they ran them under the axle saying there wasn't any room to run them over top (driver side) my pipes are 2 1/4" with glass packs in the rear (along side of the gas tank).
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Old Feb 13, 2003 | 09:21 PM
  #2  
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From: Windsor ONT
thirdgen?, wow, clearance MUST be a problem hey? Mine is setup the stock way, but with 3" pipe behind the dual cats.. it goes up OVER the axle, into a single muffler, then dual outs on either side.
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Old Feb 13, 2003 | 10:06 PM
  #3  
Idlehands's Avatar
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From: Cambridge
Car: 1985 Trans Am
Transmission: 5 Speed
actually surprisingly enough, clearance isn't bad (except over speed bumps just go SLOW!) The problem is when Jacking the rear end the axle rests on the pipes i really want to go over the axle.
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Old Feb 14, 2003 | 02:54 AM
  #4  
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From: Arthur, Ontario, Canada
Car: 92Z28, 99SS, 83Z28 & 86GTA
Engine: 421, LS1, 327Turbo & 383
Transmission: T-56, 4L60E, T5 & 4L60
Axle/Gears: 4:10, 3:42, 2:73 & 3:27
They do fit over the axle.
Attached Thumbnails Dual Pipes-dual-exhaust.jpg  
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Old Feb 14, 2003 | 02:55 AM
  #5  
Hawk92z-TDZ's Avatar
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From: Arthur, Ontario, Canada
Car: 92Z28, 99SS, 83Z28 & 86GTA
Engine: 421, LS1, 327Turbo & 383
Transmission: T-56, 4L60E, T5 & 4L60
Axle/Gears: 4:10, 3:42, 2:73 & 3:27
see see
Attached Thumbnails Dual Pipes-over-axle.jpg  
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Old Feb 14, 2003 | 05:01 AM
  #6  
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ok who got crazy with the blue paint? hahahaha
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Old Feb 14, 2003 | 05:55 AM
  #7  
D's89IROCZ's Avatar
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From: Ontario, Canada
Car: 1989 IROC-Z
Engine: 5.7L EFI LTR setup
Transmission: T-5 World Class
okay ....who did the duals ....I want them bad !!!!!!!!!!!!!!!

hook me up with the digets########
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Old Feb 14, 2003 | 06:20 AM
  #8  
tanager11's Avatar
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From: Brampton
Car: 91 Z28 Vert
Engine: 305
Transmission: TKO
Axle/Gears: 3.55 10-bolt
Ya I like the way those look....I bet they sound nice too!
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Old Feb 14, 2003 | 06:54 AM
  #9  
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From: Ontario, Canada
How much did that cost ya? I've got exhaust work coming up in the spring and I'm considering a bit of a change. And where did you get that done?
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Old Feb 14, 2003 | 09:55 AM
  #10  
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From: Ailsa Craig, Ontario, Canada
Car: 84 Trans Am
Engine: 350
Transmission: 700r4
thats deadbird's car. he made the exhaust himself, including the mufflers. he did a very nice job. the exhaust is fully welded and has an H-pipe and everything. i believe he has a website link in his sig to more pictures. search for some of his posts.
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Old Feb 14, 2003 | 10:54 AM
  #11  
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From: Ailsa Craig, Ontario, Canada
Car: 84 Trans Am
Engine: 350
Transmission: 700r4
http://www.deadbird.org/


theres the link to his site.
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Old Feb 14, 2003 | 11:28 AM
  #12  
johnyIROC's Avatar
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From: London, Ontario, CANADA
Originally posted by darbleinad
http://www.deadbird.org/


theres the link to his site.

Yeah... that guy's pretty handy. He grafted some cool door handles in too. Stock thirdgen doorhandles are definitely on my sh*t list.
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Old Feb 14, 2003 | 01:14 PM
  #13  
Idlehands's Avatar
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From: Cambridge
Car: 1985 Trans Am
Transmission: 5 Speed
2 1/2" pipes too, i've gotta go back and get them to go over the axle
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Old Feb 14, 2003 | 01:36 PM
  #14  
Hawk92z-TDZ's Avatar
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From: Arthur, Ontario, Canada
Car: 92Z28, 99SS, 83Z28 & 86GTA
Engine: 421, LS1, 327Turbo & 383
Transmission: T-56, 4L60E, T5 & 4L60
Axle/Gears: 4:10, 3:42, 2:73 & 3:27
Not on my car, its blue not white but i was doing research on it off this site as i need exhaust this year. Only good parts of my exhaust are the cats and the muffler, all else is rotten. And i need emissions. If i can scrounge up the money i want to go 4th gen borla. But thats doubtfull.

My mechanic has a pipe bender and can do that dual exhaust set up. Only thing he mentioned about it to me was that the driver side pipe sits abit close to the feul lines, so "might" cause problems. And that particular set up has no cats, not legal. Just have to add them.

I luv how he used the Forth Gen tips to even out were the exhaust comes out the back.
Attached Thumbnails Dual Pipes-4th-gen-tips.jpg  
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Old Feb 15, 2003 | 03:31 PM
  #15  
deadbird's Avatar
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From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
Originally posted by STIFFLER
ok who got crazy with the blue paint? hahahaha
I know you're not bustin' on my blue paint :nono: :sillylol: (as if I care )

Thanks for the compliments guys. Here's a few more pics for those that care...

*pic links removed due to limited hosting space*

The pipe does run rather close to the fuel lines but, using some aluminium flashing to make a heat sheild solves any 'would-be' problems. I have no problems so far but will eventually be making a heat shield anyways. Not a high priority though.

Last edited by deadbird; Apr 6, 2003 at 07:29 PM.
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Old Feb 15, 2003 | 05:09 PM
  #16  
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From: Ailsa Craig, Ontario, Canada
Car: 84 Trans Am
Engine: 350
Transmission: 700r4
all i can say is excellent work, man. very nice. how do those homemade mufflers sound? loud? deep? they look like they flow very well. i have true duals with hooker aerochambers and it sounds deep as hell.
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Old Feb 15, 2003 | 05:48 PM
  #17  
Hawk92z-TDZ's Avatar
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From: Arthur, Ontario, Canada
Car: 92Z28, 99SS, 83Z28 & 86GTA
Engine: 421, LS1, 327Turbo & 383
Transmission: T-56, 4L60E, T5 & 4L60
Axle/Gears: 4:10, 3:42, 2:73 & 3:27
Of all the dual set ups i found, yours was my favorite. Still considering copy'n it.
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Old Feb 15, 2003 | 10:30 PM
  #18  
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From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
dar.. at idle in the garage they are almost unreasonably bassy depending on where yuo stand but, they aren't loud. The sound is hard to describe really w/o having a sound clip of some sort for listening. I, by no means have any real smarts to design stuff, but, from observation of driving the car on brief stints, the exhaust loudness/tone really varies by throttle. If you drive somewhat sanely, the exhaust tone is very deep w/o being obnoxious loud. When you lay the hammer down though, it's the next closest thing to running open exhaust in sound (which I've done more than once while making the exhaust ).
From what I can tell (w/o any real brains behind it) is once the is enough 'air' velocity moving thru the mufflers too overcome the perforated inner tubes, the mufflers basically act as straight tubing. Civilized driving though, allows for the mufflers to actually absorb some of the sound.
I tried once to record the exhaust but, I had to have the level so low that you could barely hear the car idle but, when revved, it still distorted the mic at 6ft distance if that tells you anything on the variation of loudness.
In all honesty, I'm not positive I like the depth of the tone yet but, I do like the sound of the true duals (it's similar to the mustang soound which I've always liked). Adding 3ft of pipe to the muffler end seriously changed the depth of the tone though so, I've concidered making a single case, dual muffler setup to fit the stock location. Nothing is set in stone though since I still have tons left to do on the car but, it's all still up in the air.
I thank you guys for you compliments though. I only made my exhaust mainly for the fact that so many people said the pipe can't run over the drivers side and, the factory routing of the y-pipe under the oil pan is such on awful design IMO.

Hawk.. if you want to copy my exhaust.. by all means do it.. I hold no patents and what I make isn't a big secret. I've explained my doorhandles and my "CAI" (which is nowhere close to done) to quite a few people who like the 'stock look' but yet it isn't but, just what to know what's involved or the parts used.
Sorry that was long & boring but, the length of my rambling is proportionate(sp?) to the amount of frosty Buds I've had
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Old Feb 16, 2003 | 11:23 AM
  #19  
darbleinad's Avatar
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From: Ailsa Craig, Ontario, Canada
Car: 84 Trans Am
Engine: 350
Transmission: 700r4
awww....the old getting honkeytonked on a saturday night trick. i agree with you abou the poor design of the y-pipe on these cars. i cant stand the single exhaust system, which is why i had to have dual exhaust...and as you also mentioned, the sound is great.
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Old Feb 16, 2003 | 02:30 PM
  #20  
D's89IROCZ's Avatar
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Posts: 1,931
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From: Ontario, Canada
Car: 1989 IROC-Z
Engine: 5.7L EFI LTR setup
Transmission: T-5 World Class
I'd put that dual setup on MY car ..... if you ever run tight on cash ...... I'd buy one of those setups off of ya ! I wish I had the space and stuff to mess around like that


nice system
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Old Mar 11, 2003 | 11:58 PM
  #21  
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From: Mesa, AZ
Deadbird - how is your ground clearance on that? Do you scrape much? It doesn't look as bad as some others I've seen but its still not tucked up as much as I'd like on my car. My car seems to scrape enough as it is with 3" stock routed exhaust. Is your car lowered?
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