I am curious cause I have seen a thirdgen done this way. Would you be able to go across speed bumps??? I know it would sound kickass, just wandering if anyone has exhaust this way.

------------------
Bright red 87 GTA with I have stock 3.27 gears,stock converter,B&M shift kit, TRW forged 9.75:1 pistons,comp cams pushrods, edelbrock valvesprings, 462 camel hump heads with 2.02in/1.60ex redrilled for angled plugs, 3 angle valve job, ported and polished, performer RPM intake, mallory fp regulator, edelbrock 750 CFM carb, hei ignition(new) with 10,000 volt coil,No cat, flowmaster 2 chamber mufflers, hedman full length headers, edelbrock cam with 488/501

 

I think you can, but you will drag over everything. The best way to do it would be to run both pipes on the passenger side. I was thinking about how to make duels work on my car and the only thing I could come up was getting a 1 inlet, 1 outlet muffler, the kind where the inlet and oulet are offset from eachother, and having the I-pipe run to the muffler which would be in the stock location, the outlet pipe would exit on the driver side. Then I would get another pipe ,put a muffler(not sure if it would be offset or straight throug inlets and outlets) on it near the cat converter location and run the pipe underneath the back axle and have it exit on the pass side.

OR, get two mufflers with offset inlets and outlets and zig-zag them together to save some space.

=============[--------]
===[--------][--------]===========
[--------]======================

 

duels eh? my brother-in-law has duals under his 84 camaro, he didnt scrape that i know of, but that doesnt mean anyone else wont

 

your going to go to all that trouble to put duals on, only to find all that work and money spent wasn't worth the "no" performance gain and crappy sound. Buy a decent catback and leave it alone.

------------------
91 Formula
305 TPI 5speed
1LE/G92/WS6

Paxton SN92 polished kit, SLP airfoil, ported/polished plenum, March pulleys, Crane AFPR(43psi),Crane Gold 1.6rrs,MSD coil,MSD6AL (5200rpm limit),Holley 9mm wires,Ac delco R43ts plugs,stock chip,Ford SVO 24# injectors,Bosch O2sensor,SLP 1 5/8" headers,SLP catback,shortened shifter,3:73s w/Auburn posi,170* t-stat,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.

 

One thing I dont get is why everybody is SOOOO hyped up about running "duels" on their cars. A GOOD 3 inch or bigger single exhaust will outflow any "duels", any day... without the headaches of trying to fit two piepes where they weren't ment to be from the factory. A duel is an old term for when two people fight... A duAl exhaust system sound more like it. lol

------------------
92 Z28 5.7
------------------
Ported stock heads, XR270HR-10 cam, TES headers
Crane AFPR, Flowmaster catback, MSD ignition
#24 SVO injectors, 1LE aluminum driveshaft.

Best ET 13.3@107 mph

Click here to see my car at Truspeed.org
Check out Truspeed
Check out the Bin Archive

 

I've seen a true dual setup before. The guy was running full length headers, then 2" pipe with no cats all the way back and over the axle, then he had short glasspacks between the gas tank and the bumper underneath. It sounded pretty tight, but I know the small diameter pipe restricted it quite a bit more than a good 3" cat-back. And the truth is cat-backs arent bad at all. All the stangs laugh at us, but if you get some good headers (most come with a y-pipe,)a hi-flow cat, and a good muffler, it'll work just as good.

------------------
1988 Pontiac GTA 5.0 TPI
-K&N Filter
-Hypertech Air Foil
-Hypertech Perf. Chip
-2.5in Flowmaster Muffler
-Catco Hi-flow Cat

15.32@88mph
2.077 60-ft.
Kills
94 Probe GT, 95 Mustang GT, 96 Impala SS, 85 Thunderbird 5.0, 95 Accord V6, 98 Integra VTEC, 70 Chevelle Malibu, CRX w/ Turbo and Intercooler (have it on tape to prove it)

 

dual exhaust just sounds cool. By sound, I don't mean the actual sound out of the exhaust. When you tell a non-thirdgen person you have dual exhaust they think 'cool'.



------------------
82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

I could care less if a duel system added anymore power than a catback or not. The only reason I would do duels is for the sound alone. Single exhaust doesnt sound nearly as good as a true duel set up.

 

3.1, what is your setup now? stock? if so, my friend has a 83 blazer with a 6cyl, and he put a 2 chamber flowmaster on it(kept the single exhaust) and it sounds really nice, almost like a 8cyl, until of course he revs it up.. but still, i might go for that before going to the trouble of putting duals on it

------------------

• 83 Z28--ttops, 200k miles--very ragged out. sold after a year of owning it
• 74 Z28--slightly modded 383, TH400 tranny, 10 bolt rear, not to swift, but a 700R4 and EFI is on the way

 

I agree with Blade! You know... we goota give our GM (F-Body) engineers some credit sometimes. They knew what they were doing when they designed the cars. Sure 'Stangs have true duels, but s#!/ a stock L98 or LB9 well tuned sounds damn good! Add 3" catbacks to that and it just gets better.



------------------
Proud newly acquired '91 Formula 305 TPI 700R4, 34K miles, Factory Black on Black all stock - no current HP mods (might keep that way!). Rims are '91 T/A black Diamond Spoke 16x8s. 20% tint & Black Widow Alarm system. Very near future plans: K&N filter, catback Flows, fresh paint job, new 255ZRs all around.

 

duAl, duAl, every try it, it's dual exhaust. Not duel.
If it doesn't make my car faster, I'm not wastin' my money on it. The reason why some dual exhaust cars sound so much better is because the cats are gone. My single exhaust sounds just fine.
http://208.228.34.13:85/sounds/lowrpm.wav

http://208.228.34.13:85/sounds/highrpm.wav


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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

You will never get the sound your after from a 3.1 liter. With single or dual exhaust. Don't waste your time.

By the way, who cares what Mustangs sound like. We all know they go nowhere.

Trust me, if true duals (note spelling) actually made THAT much of a difference on our cars, there would be an aftermarket company marketing them.

 

MTX, its a magnaflow and it rices out on me bigtime at high RPMS, I just ordered a dynomax superturbo since the other V6er's like them. I was really just wanting to put duEls on my car for the hell of it because I like the way a 6, and especially an 8 sounds with duEls.

 

since you know so much why dont you tell me what kind of exhaust tone I am trying to get out of a 3.1?

You still dont get it do you. DuEls sound better, as in the tone, not telling people you have duEls.

Poking a stick through your cat isnt going to solve your problems.(directed at 82)


[This message has been edited by 3.1 firebird (edited March 14, 2001).]

[This message has been edited by 3.1 firebird (edited March 14, 2001).]

 

Brand,

Tell me again -

Why would I want to be like a Mousetank anyway? And try to make me BELIEVE it this time...

(Just pullin' your string a little)

------------------
Later,
Vader
------------------
"I'm'a do Things My Way - It's My way or the Highway."
Adobe Acrobat Reader

 

I actually had true duals on 86' IROC (RIP now ). It sounded very good!! Like no other thirdgen. It sounded a lot like an old muscle car, like a Chevelle, for example. Anyway I have 2 points to make here.

1) For you guys who think that single 3" outflows dual 2.5" exhaust: Using pi x radius(squared), to find the area.
2.5" pipes=4.90" of surface area.
so dual 2.5" is 9.80" total

3"=7.06" of surface area

7.06 is less than 9.80, right?
So, that proves duals flow better.

Even single 3.5" exhaust has a total area of 9.61"....still less than Dual 2.5"

2) Duals sound a LOT better than ANY single system. Basically most third and 4thgens sound all high-pitched. It's all loud, but not deep like the Mustangs are. Personally I hate the way most thirdgens sound.

-Now, back to the topic, sure you can fit 2 mufflers under there. You have 2 choices; cut the bottom of the rear storage area out, and get it re-welded up about 5-6 inches. So then you can easily put 2 Flowmasters right before the rear bumper. OR you can beat in the floorboard, and put the mufflers just like they are in a Mustang.



------------------
89' Iroc-Z
ZZ3 short block-355 TPI ZZ9 cam
NOS 150 shot.
blah...blah...blah..
95' T-56, 6-speed
99' Z' rearend w/ 4.10's
------------------
1997 black Trans AM
LT1, A4, basically stock.
13.87 on the G-tech

 

This is the ONLY way I've seen duals on a thirdgen that actually LOOKED good and didn't drag or vibrate!! Underneath the car where the back seat is at....hammer the sh*t out of it....banging it up! It will not bother the seating inside!! Then you run the exhaust back to that point and put the mufflers right where you banged the metal up! Weld hangars to it and you'll have no vibration problems and it'll actually look good, sound good, and won't drag the ground at all!!

However, my friend recently changed from a 2 1/2" pipe to a 3" pipe and oh wow, what a difference!! Amazing!! He's also only running a single outlet flowmaster and still has the cat too! My car right now came stock with 2 3/4" pipe and I'm running the dual outlet flowmasters with NO cat and it sounds damn good....STOCK!! After I put the 350 in I'll be upgrading to a 3" pipe, still running the dual outlet flowmasters!! GREAT sound, cheaper, and EASIER to set up!!

------------------
1986 Trans AM
305 TPI
200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Soon to upgrade to a 355 converted from TPI to Carb, Edelbrock 750CFM Carb, Edelbrock Performer RPM Intake, Hedman Shorty Headers, Stock casting pocket ported heads (2.02/1.60 - 65cc), XE268 Cam, Moroso HEI ignition kit with external MSD Blaster II Coil and an MSD 6-AL Box!!
Current project: Keeping my 305 running until I get my income tax returns!

 

IMO, Third Gens sound much better, single or dual.

------------------
Looking For:

87 IROC-Z 350 TPI
84 TRANS AM 305 H.O.

[This message has been edited by IROCZTWENTYGR8 (edited March 15, 2001).]

 

I always get compliments on how my car sounds. Sure the big cam, no cats and the cut-out helps, but it's LOW as it can get. NO high-pitch sounds coming from my exhaust.

 

same here. You guys need to start concentrating on mods that actually make a difference.

 

I'm glad 89roc gave those flow #s. I guess thats the reason the fastest cars in the world use dual exhaust,because they flow better! The past 2yrs,my sons car has used 1.75 primary long tube Hookers with 3.5" pipe into 3.5" in and out Holley mufflers. Yes,there is a small clearance problem,but nothing you can't live with. Also,we live a mile away from the worlds largest car show/cruise,so we get our fair share of 3rd gens.I've never heard one single piper with the quality exhaust note(at idle or under power)that a dual emits.
The 3rd gen I'm building now,will have 1 5/8 shorties with 3" running into a pair of Super Trapps. This will give me the same clearance as a single piper.

------------------
My sons car: 86 Iroc,388ci,Brodix,Victor jr,TPI-700r4,3:73.

 

If it's the flow and sound that your after then go for muflex's 4" exhaust that'll do it...

 

I agree with theformula. Nobody can hear your exhaust if everyone is in front of you. Do something useful with your money and make it look better or drive better. I've planted a zz4 with single 3" dual flowmaster and it doesn't sound as good as a mustang (except at idle) but they're always reading my back license plate and bumper sticker "I like your girlfriend."

 

If you're just looking to get a good sound (at idle and with throttle) but not so interested in killing 'Stangs (like me currently), is the an easier way to run true duals on my 3rd gen TPI car? That is, easier than banging up my floor?(86tpi??)

 

The best dual set up I've ever seen was on a 92RS with an all aluminum ZZ3 engine. The guy cut the trunk well, shortened it and stacked two flowmasters in the newly available space! Oh, it was a 4" system too if memory serves me.

------------------
Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/relocated MAT/ AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

well ive actually herd a 3rd gen with dual exhuast and it sounded good but i think my system sounds better- Headman headers( 1"5/8 to 3" collecters straight to a flowmaster muffler( no cats ) and me and all my friends agree that my system sounds deeper and louder. also even i have clearance problems sometimes( but thats probaly cause i lowered my car's front end 3" adn my back 2")

------------------
1992 Z28 W/5.7L. Teal with unpainted cowl hood,18" Billet Specialities Rims,Eibach Sportline Springs, Leather int., B&M Mega Shifter, Headman Headers, Flows,No Cats,K&N,HyperTech air foil,Custome Burned Chip,MSD Ignition,Shift Kit, Billet Corvett Servo my Back License plate reads "ALL UL C"
Here's a pic of my car
http://www.geocities.com/jonnyarson/maro.jpg

[This message has been edited by BigMike 92 Z28 (edited March 18, 2001).]

 

I have a 3 inch cat back on my camaro and i have a flowmaster muffler and it sounds just like DUAL exhauset you stand behind my car and you see two pipes(which we all know is just from the one in two out muffler ) but it sounds nice with my cam. its got a nice lope to it. sounds totally cool if i turn the idle down to like 350 to 400 rpms..when she'll hold that at idle that is




------------------
1983 CHEVROLET CAMARO with a 1986
305 C.I.D.V8 BORED .030 OVER
HIGH VOLUME OIL PUMP
FLAT-TOP PISTONS
MILD CAM
3" CAT BACK EXHAUST W/ FLOWMASTER MUFFFLER
KEYSTONE CLASSIC WHEELS.
B&M RATCHET SHIFTER
STAGE THREE SHIFT KIT
(she'll spin em into third)

CHECK OUT MY SITE http://www.fbody.com/members/bigdaddyshawn/


MUSTANGS SUCK

 

I have never seen a v-8 idle at 350rpm before...

 

Actually for 89Iroc, just to use your own arguement against you (not trying to stir up trouble!!!)the reson the single works better on F cars is that &(^% rear axle! We want the air to go as straignt from the engine to the outlet as possible. Every bend creates a high pressure zone. In a dual setup, now you have 2 2.5" pipes, trying to clear the axle, as opposed to a single 3" pipe, a greater high pressure area. I am sure it is possible to come close to mathcing the flows of the dual and single, but SLP dumped HUGE amounts of cash into flowbenches, and Dynos and my '87 350 w/ the SLP headers flows very nice and picked up power, just from the better exhaust. However, if you could have a straight pipe all the way back from the headers to the outlets, the dual setup would flow better. Just remember though, that *SOME* backpressure is a good thing!



------------------
Corry Lazarowitz
clazarow@voicenet.com
clazarowitz@hotmail.com
SLP 1 3/4" headers, 3" cat back (stock cat )MSD ignition. MSD Blaster SS coil. More soon when funds are avail...