straight pipes or mufflers?? - TCCoA Forums
 
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post #1 of 26 (permalink) Old 01-04-2010, 12:09 AM Thread Starter
 
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straight pipes or mufflers??

my 94 4.6 currently has all three stock cats with my mufflers removed and has 2.5' piping , its only loud during accelaration so i was thinking of removing my third cat and resonator...now will it make alot of differance from my current setup or barely noticable....or should i just remove all cats+resonator and throw in a flowmaster super 44 or 2 maybe idk??

the other mods i have are K&N air intake and air silencer removed with custom ram air.
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post #2 of 26 (permalink) Old 01-04-2010, 06:50 AM
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If you are in "Location: Norwalk , CA" you better leave those Cats ALONE~! - Resonator is just a pipe with Muffler housing attached & go ride in a car for a day that DRONES like hell around 2K Rpm before you screw with that... You may want to consider finding something more constructive to maintain on your car.

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post #3 of 26 (permalink) Old 01-04-2010, 08:12 AM
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Quote:
Originally Posted by 94LXbirdy View Post
my 94 4.6 currently has all three stock cats with my mufflers removed and has 2.5' piping , its only loud during accelaration so i was thinking of removing my third cat and resonator...now will it make alot of differance from my current setup or barely noticable....or should i just remove all cats+resonator and throw in a flowmaster super 44 or 2 maybe idk??

the other mods i have are K&N air intake and air silencer removed with custom ram air.
good questions here..hope someone can answer these....

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rest in peace JL
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post #4 of 26 (permalink) Old 01-04-2010, 08:19 AM
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Two things to keep in mind:

1) If you remove the cats, in some parts of the USA, that's a pretty healthy fine due to defeating the emissions control aspect. Your choice.

2) The cats help extend exhaust life by heating the exhaust gas quickly past the acid point (hey, there's a REASON why my 2000 Malibu has 250Kmiles on it with factory exhaust! Between the stainless steel and the cats, plus the mileage I put on it, there's almost NO time it's blowing water out the back ... )

Counterbalancing both is that the cats ARE restrictive.

If you pull them, however, I'd look for some kind of muffler so that the local police don't flag you and pull you over every time you drive down the street ...

RwP
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post #5 of 26 (permalink) Old 01-04-2010, 09:00 AM
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Id say rather that just pull them replace them with new hi flow ones. Even better why dont you replace the exaust manifolds for headers. Ive always found that when doing exaust Its better to work from the front back. You will "feel" more starting with headers and hi-flow cats than any deletion or new mufflers

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post #6 of 26 (permalink) Old 01-04-2010, 02:01 PM
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Originally Posted by RalphP View Post

2) The cats help extend exhaust life by heating the exhaust gas quickly past the acid point (hey, there's a REASON why my 2000 Malibu has 250Kmiles on it with factory exhaust! Between the stainless steel and the cats, plus the mileage I put on it, there's almost NO time it's blowing water out the back ... )

RwP
i had no idea cats extend your exhaust life.. guess im leaving mine alone til i can get high flow cats..


so if he took the resonator off and added some flows it would still have horrible drone? guess im leaving that alone too.

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Last edited by Tbird1997; 01-04-2010 at 02:06 PM.
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post #7 of 26 (permalink) Old 01-04-2010, 03:34 PM
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Stay away from straight pipes. Trust me, the drone is darn near unbearable. Save up and do it right. High flow cats, headers, etc . . .

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post #8 of 26 (permalink) Old 01-15-2010, 07:29 PM
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3.8 SC Cats and Resonator- Straight 2.5 out as purchased

Only time I hear the radio is at idle. Do it right the first time as I will be doing.
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post #9 of 26 (permalink) Old 01-15-2010, 08:25 PM
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Ahh, that drone. I know it well: high flow cats and true dual straight pipe ending right before the gas tank. The closer to 2000RPM you are, the worse it drones, and it is extremely annoying.

Needs more stall.
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post #10 of 26 (permalink) Old 01-15-2010, 10:18 PM
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Just have the 2 cats after manifolds or headers and go true duals with an X pipe and have the flowmasters at the back bumper.. Ull be very happy with that set up.. At this moment I still have factory cats and manifolds, and true dual pipe and flowmasters. It sounds great!! No drone! I'm adding an x pipe soon though

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post #11 of 26 (permalink) Old 01-19-2010, 05:49 AM
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i have kooks headers no cats, custom x pipe, no mufflers, i had borla but i cut them off and sold em, now it sounds awesome, turns everyones head and drops their jaws lol

96 pearl white 4.6 tbird: rebuilt npi block with pi heads, pi intake, crower stage 2 cams, shm high lift springs, L-MAF, 3.73's, marauder converter, jmod, kooks headers, xpipe, no cats, 2.5 in exhaust, no mufflers, a dyno tune, lots of interior work, 1 in drop with lots of new bushings, 18 in rims. 279 hp 319 tq. curently running 13.9 at 101 mph with a 2.1 60 time in 100 degree weather while having some nasty spark knock. Soon to have higher stall, aftermarket intake manifold, weight reduction, and hopefully a nice shot of the giggle gas.
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post #12 of 26 (permalink) Old 01-19-2010, 08:44 PM
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Well in my opinion id go with removing the third cat and adding some mufflers. I tried my 5.0 with only the first two and it was loud and sounded like a piece. Added some flows onto her and sounds great!

Zero

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post #13 of 26 (permalink) Old 02-02-2010, 03:10 AM
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if you ran straight pipes with an x-pipe and mufflers how many high flow cats would need to still sound meaty, but still be able to pass smog?
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post #14 of 26 (permalink) Old 02-02-2010, 06:49 PM
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No matter how much power, you still need back pressure from something in the exhaust. Almost all the good performance mufflers have almost a straight through design anyways and will give you a nicer sound overall. These companies do so much research and development to make a good product for power and sound, there really is no reason to not do 1 or 2 mufflers. Just my opinion after years of changing exhaust systems out.

Last edited by tbirdsc14; 02-03-2010 at 08:14 PM.
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post #15 of 26 (permalink) Old 02-03-2010, 12:42 AM
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Cool

thanks that was really informative
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post #16 of 26 (permalink) Old 02-03-2010, 10:08 AM
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i have kooks headers no cats, custom x pipe, no mufflers, i had Borla but i cut them off and sold em, now it sounds awesome, turns everyones head and drops their jaws lol
Same set up here only I still have the Borla's on mine. I like it a little quieter but it still sounds very respectable and turns heads when I open the throttle up.



Here's a short video of mine... Just ignore that slight wine you hear, it's unrelated to the exhaust ...


Mods? Yea, I got mods ...
Air silencer delete, warp drive, dilithium crystals, flux capacitor, Slingshot Rubber band power adder, Moonshine & Gas, Leaf Blower Supercharger, Hamster Wheel & Hamster, Energizer Bunny generating 1.21 gigawatts, Mr. FusionŽ Home Energy Reactor, hover conversion and a sextant celestial navigation system (The original GPS)
Best 1/4: 1,320 nanoseconds @ 670,616,629.2 miles per hour

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See a list of my real mods and pictures of my car HERE. The true performance of my car was made possible by the Carolinas Crew Chief, RobertP at Rob's Tire & Auto

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post #17 of 26 (permalink) Old 02-03-2010, 11:25 AM
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Trunk Monkey, that is music to my ears! Sounds Sweet.
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post #18 of 26 (permalink) Old 02-03-2010, 12:27 PM
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Hey Ron...it looks like you need new rear tires....



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post #19 of 26 (permalink) Old 02-03-2010, 12:32 PM
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Quote:
Originally Posted by Trunk Monkey View Post
Same set up here only I still have the Borla's on mine. I like it a little quieter but it still sounds very respectable and turns heads when I open the throttle up.



Here's a short video of mine... Just ignore that slight wine you hear, it's unrelated to the exhaust ...

Sounds great, but you need matching corner lights!

-Matt
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post #20 of 26 (permalink) Old 02-03-2010, 12:36 PM
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Trunk Monkey, that is music to my ears! Sounds Sweet.
Thank you.

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Hey Ron...it looks like you need new rear tires....
Those were racing slicks I had on the car for running at the strip that day.

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Sounds great, but you need matching corner lights!
Thanks. LOL, yea, I have the matching corners I'm just to lazy to put them on.

Mods? Yea, I got mods ...
Air silencer delete, warp drive, dilithium crystals, flux capacitor, Slingshot Rubber band power adder, Moonshine & Gas, Leaf Blower Supercharger, Hamster Wheel & Hamster, Energizer Bunny generating 1.21 gigawatts, Mr. FusionŽ Home Energy Reactor, hover conversion and a sextant celestial navigation system (The original GPS)
Best 1/4: 1,320 nanoseconds @ 670,616,629.2 miles per hour

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post #21 of 26 (permalink) Old 02-03-2010, 01:11 PM
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What video/audio?

I see the pic, but the bottom only has a red X in the corner. Is it just my computer or does anybody else have this problem?
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post #22 of 26 (permalink) Old 02-03-2010, 01:17 PM
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i can see the vid just fine..

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post #23 of 26 (permalink) Old 02-03-2010, 04:46 PM
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I see the pic, but the bottom only has a red X in the corner. Is it just my computer or does anybody else have this problem?
you probably have flash blocked

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post #24 of 26 (permalink) Old 02-03-2010, 04:50 PM
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you probably have flash blocked
Close, I had to update Shockwave and now I see it fine. Thanks for your help guys!

BTW, that sounds.......AWESOME!!!! I told Trunk Monkey b4 that he inspires me!!!
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post #25 of 26 (permalink) Old 02-03-2010, 06:52 PM
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Backpressure, schmackpressure.

There's some great info HERE that should be considered before blindly buying into that whole "needs more backpressure" theory.



....and is worthy of a sticky IMO.

Delete my account.
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post #26 of 26 (permalink) Old 02-03-2010, 06:57 PM
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Hmm . . . interesting information there.

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