true duals

funjanbird · 06-06-2002, 02:02 PM

why is everyone going with catback systems when true duals sound so much better. I know there are ground clearance factors, but it can be done and sometimes cheaper than catback.

irocz383 · 06-06-2002, 03:29 PM

A single 4" cat back will flow better and out perform a doul 2" exhaust.

Test the theory... Draw a 4" circle and then draw two 2" circle s inside the 4" circle. Then you'll see all the extra space that a single pipe uses for the exhast to flow.

brodyscamaro · 06-06-2002, 04:34 PM

not this again...
oh well, fact is large single pipe can flow just as much as true duals. fact is not one exhaust shop would run duals on my car, i called them all in my city. and there is always the legality issue, it may not be simple for many people to deal with that. check this link out:
http://www.prestage.com/db/default.a...ps_ExhaustSize

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1992 Camaro RS LO3/700R4
Holley 600 Double Pumper, Weiand Stealth Intake Manifold, Hedman Headers and Modified Hedman Y-Pipe(Ported and 3" Pipe), Straight-Pipe Cat, Flowmaster 3" 2 Chamber Race Muffler, 160º thermostat, 3.73 Posi, Boxed LCAs, Kumho 255/50s, Polyurethane Transmission Mount, and B&M SuperCooler.
Waiting To Be Installed: ZZ4 Cam

irocz383 · 06-06-2002, 06:55 PM

That link was perfect!!!

Unless you have enough room to run two 3" pipes under the car... a single 4" will do just the same.

IrocSS85 · 06-09-2002, 03:37 AM

Quote:

Originally posted by irocz305:
That link was perfect!!!

Unless you have enough room to run two 3" pipes under the car... a single 4" will do just the same.

I agree that 4" will do the same, but those systems cost like $600! I got my duals w/hpipe used for $60, but could have paid a local exh. guy around me like $250 plus the mufflers for custom job new. plus I agree duals do sound better, but at the ground clearance expense. I have some pics of my duals at

http://photos.yahoo.com/bc/irocss86/...xhaust&.view=t

the light was placed under the lowest part of the syst. to show ground clearance. plus, if you replace the cheap mufflers w/dynomax bullits (about $40 ea. from summit) you wont even have to modify the floor boards like I did. that part above the muff.s is underneath the rear seat cushions, so it is unnoticable from inside the car.

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1985 Iroc Z, (parting out, email for parts)

1986 Iroc Z, (up and running, but still lots of work to do)
355, ported camel hump heads,750 holley, 700r4, 10.5 compr., forged flat tops, solid cam .501I .510E, 4gen rear w/3:73posi,girdle, and disc's, Edel. torker II, shift kit, 3500 stal, hedmann LT. headers, 4 gen seats, man. strg., lt1 starter, alum. w/p, msd :6al, coil, dist., mallory wires. exp high 12's-low 13's

1995 z28,SS Hood, Iroc style spoiler, tints and black outs, 700r4,2400 act. stall speed,B&M hammer shifter, 17" budnick trilogy III wheels, 275/40 ZR17, 160 stat, man. cooling fan sw., homemaid CAI,1LE elbow, hypertech airfoil, t.b.bypass,!cat, flowmaster, !maf screen, relocated batt., 1LE front l.c.a.s', poly trans and torq.arm bushings, MSD 6AL, custom program, p&p maf, accel coil, and under drive pulley

mods that i have, just not on car yet:
msd wires, edelbrock mid. headers, edelbrock rpm catback

aklim · 06-09-2002, 10:17 AM

Going with true duals is good for the image. They can say "Look, I have true duals so I am a real sports car." Most people don't need them. If you factor in the time to construct it out of say 304 mandrel bended steel and quality mufflers and the cost of the materials and the fact that you have changed your ride height vs what your needs are and look at it LOGICALLY, you probably would decide against it.

IrocSS85 · 06-09-2002, 03:59 PM

Quote:

Originally posted by aklim:
Going with true duals is good for the image. They can say "Look, I have true duals so I am a real sports car." Most people don't need them. If you factor in the time to construct it out of say 304 mandrel bended steel and quality mufflers and the cost of the materials and the fact that you have changed your ride height vs what your needs are and look at it LOGICALLY, you probably would decide against it.

were not talking about "needing them", were talking about likeing the sound better AND not leaving any horsepower wasted in the exh. and saving money over the better of the single systems. I do agree that if your under 300 HP, there's no point. but I and lots of others are planning on lots more mods to come in the near future, and I dont want to spend $600 on exh. now so I dont have to upgrade again later when i do reach higher horsepower levels. me having true duals has NOTHING to do w/image. so save that remark for the rice burners. like I said, it was cheap and I gave up the least amount of horsepower to make it quiet. my car is quieter then my wifes 95 w/flowmaster single exh. w/o any of that annoying crackling.
true that its prolly not for the guy that wants to ride on the ground. not enough room for true duals and being slammed. but Im not into that at all.
the mandrel bent stuff is for the people w/lots of money, so they can get the 4" tubing instead anyway.
now you look at my explanation LOGICALLY.

brodyscamaro · 06-10-2002, 12:57 AM

Quote:

Originally posted by IrocSS85:
I agree that 4" will do the same, but those systems cost like $600! I got my duals w/hpipe used for $60, but could have paid a local exh. guy around me like $250 plus the mufflers for custom job new.

i wish i could have found someone selling a dual system that would bolt right on to some long tubes. i would rather have duals anytime anywhere, i am not selling the car anytime soon so maybe 15 yrs from now...
i couldnt find one exhaust shop in my city to bend and weld a dual setup. so that really wasnt an option for me at the time. BTW nice pics

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1992 Camaro RS LO3/700R4
Holley 600 Double Pumper, Weiand Stealth Intake Manifold, Hedman Headers and Modified Hedman Y-Pipe(Ported and 3" Pipe), Straight-Pipe Cat, Flowmaster 3" 2 Chamber Race Muffler, 160º thermostat, 3.73 Posi, Boxed LCAs, Kumho 255/50s, Polyurethane Transmission Mount, and B&M SuperCooler.
Waiting To Be Installed: ZZ4 Cam

IROC5.7TPI · 06-10-2002, 09:31 AM

You guys that say your local shops won't do dual setups.... heres the way to get them to do it-

Tell them you will pay with cash and expect no receipt. This will limit their liability and leave no paper trail that they're the one's that did the job.

If you have a cat converter take it off and slip a piece of flexpipe in until you get to the exhaust shop. Then they can't say they're liable for removing it.

And you guys quit arguing! To each his own, its your car, put the pipes you want on it!
I personally prefer single, but a good dual system on 3rd gens always impresses me. The guy that Chris got his dual system from is a good friend of mine who's car went in the high 10's this past weekend. He needs the duals that he upgraded to.

Later

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Mike L.

1987 IROC Z 5.7 TPI A4 3.27 Borg-Warner four wheel disc
Mods: 2300-2500 Stall Converter, Shift Kit(GM parts), TPI Specialties Stage 3 PROM, Modified airbox w/ K&N's, Relocated MAT sensor, Gutted MAF, 160* thermostat, MSD 6A, Accel 8mm Wires, bypassed TB coolant, 3" Flowmaster 3 chamber single outlet, custom adjustable cutout, 3" MAC mandrel intermediate, airfoil, ported plenum. !smog, Crane AFPR, Accel rail mounted FP gauge, Harlan shiftlite, 24lb. injectors, Hedman headers, a few others I forgot...??? FINALLY GOT PAINT!!

Check out my IROC webpage!

IrocSS85 · 06-10-2002, 11:39 PM

also, you could take off your license plate and trailor it up there w/o exh. on and tell them its race only veh. (off road vehicle).

Mike: ok, ok. but he started it.

lol

brodyscamaro · 06-11-2002, 12:07 AM

Quote:

Originally posted by IROC5.7TPI:
And you guys quit arguing! To each his own, its your car, put the pipes you want on it!

i did put the pipes on that i wanted, and i am not arguing just discussing

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1992 Camaro RS LO3/700R4
Holley 600 Double Pumper, Weiand Stealth Intake Manifold, Hedman Headers and Modified Hedman Y-Pipe(Ported and 3" Pipe), Straight-Pipe Cat, Flowmaster 3" 2 Chamber Race Muffler, 160º thermostat, 3.73 Posi, Boxed LCAs, Kumho 255/50s, Polyurethane Transmission Mount, and B&M SuperCooler.
Waiting To Be Installed: ZZ4 Cam

phoenix916 · 06-17-2002, 10:34 PM

Has anyone thought of going with a 2 in 2 out muffler? I tried but I took it to the wrong shop. I first bought a 2 in 2 out Borla muffler on ebay that is just about the same dimensions as stock give or take. But I took it to a guy that had only been doing exhaust for a month, My car than sat there for 3 weeks till he said he couldn't do it. I then bought the borla catback and had another shop put it on and make a y pipe. A friend of mine is probably going to try it at the better shop. If he doesn't does anyone have any interest? Has anyone done it this way?

funjanbird · 06-18-2002, 03:04 PM

I am going to run true duals but exit them infront of the rear tire. Hs anyone ever done this before and I will need to raise the rear. Does anyone have any pics.

phoenix916 · 06-18-2002, 04:58 PM

2 friends of mine have done it that way. One held up with cherry bomb mufflers but it looked and sounded a bit redneckish. The other was expensive sounded good but he ripped it off within a week running from the cops.

funjanbird · 06-19-2002, 01:54 AM

well I am going to use dynomax bullits and my dad is a cop and we have have no emissions and he says, that as long as it exits the body of the car it is legal. I just have to raise my car alittle for clearance but I have seen some sweet looking cars like this.