Here's the deal. I have a mild 305 TPI IROC with Crane Compucam, ported stock heads, etc. My exhaust consists of Edelbrock TES, Dynomas 3 inch cat, 3 inch cat-back to a Flowmaster muffler.

I'm not sure what Flowmaster I have, but it has dual outlets, one on each side, as per the stock configuration.

Well, my car is very LOUD! I think it's upsetting the neighbours too When I get on the juice, it really barks. Also, it's hard for me to hear the radio, unless I turn it way up high.

Can you guys recommend an aftermarket muffler that will be a bit quieter than the Flowmaster? I still want my car to have a nice tone that ppl notice, but right now it is just too damn loud.

Thanks......
Jim.

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1987 Chevy Camaro IROC-Z
1998 Ford Falcon XR8
My IROC-Z in Sydney, Australia.
Thunder Down Under home page.

 

Dynomax is pretty quiet...while still sounding good and flowing well.

 

The dual outlet flowmasters are known to be loud ... that's why they are included in their "American Thunder" system

You might want to consider installing the muffler that FM provides with their other kits. Its a simple 3"in/3"out muffler.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.587 @ 107.97mph (1.710 60ftr) on the long runner setup.
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels. Stock Wheels. No Weight Reduction.
Gunning for NA 11's with the MiniRam II and Hooker LT Headers.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

get the hooker aero chamber muffler. that is what im planning on getting in a week or 2. they say they are 80dB's and flowmasters are 90dB's. so you still have a good sound but its not too loud.. go to http://www.holley.com/HiOctn/ProdLin...cts/ES/ES.html ... then go to mufflers, then go to aero chamber and they got the specs there... and if you go down more you can go to GM specific fit to get the one you need.. they might also have them at www.jegs.com

 

Nevermind
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FORMULA 350 TK
Southern California 3rd Generation F-Body Organization©

[This message has been edited by Tom Keliher (edited October 06, 2000).]

 

He has a muffler.... it says so in his post. It says that he has a 3'' cat, so that isnt the problem

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1989 IROC-Z
350c.i. TPI
rebuilt 700R4 with shift kit
3'' Monza Pacesetter cat back exhaust (minus the muffler)[SOUNDS OF THIS ON MY WEBPAGE]
new dual cats
3.23 Posi rear
hypertech chip
under drive pulleys
adjustable fuel pressure regulator
K&N Air Filters
Excalibur alarm, keyless entry and remote start
new:
struts, shocks, bearings, distributor, cap, rotor, alternator, battery, regulator
245 ZR16 50 Tires, Rotors and brake pads all the way around

Go to my webpage to find out more about it.
You can also see pictures, and hear sounds as well.
http://go.to/iroc-z

AOL IMer: JRShotliff

 

i just recieved my american thunder cat back in the mail.........


good think i have a big radio.....

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1986 Trans Am
305 TPI
"If it's not one thing, it's another!"
http://www2.hanover.edu/hierlmeier

 

Whoops! My bad!!

Maybe a stock muffler?


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FORMULA 350 TK
Southern California 3rd Generation F-Body Organization©

 

89IROCZ, the sound links on your page aren't working. Sweet car

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-Rebuilt 700R4 Tranny
With the goodies to go

-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)

 

Well, I have 3 stock mufflers sitting around if you want on. 1 from my car, 1 from my friends 85 TA, and 1 from another friends 84 Z28. We all ripped them off because we like it loud!

 

I had a buddy that had similar problem, but not 3rd gen (Checy truck)... We added a 3" short glasspack (very cheap, too) after the cat/before the muffler. Sounded pretty cool and definately different. Kinda sounds like a Ducati motorcycle... Definately quiter, though. You may not have room for it, huh?

 

Thanks for the ideas guys I am starting to get used to the noise now, it aint so bad I must be an old fart or something, I never thought that any car of mine would be too loud!

Anyway, I'll leave it like it is for now, maybe get a bigger radio

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1987 Chevy Camaro IROC-Z
1998 Ford Falcon XR8
My IROC-Z in Sydney, Australia.
Thunder Down Under home page.

 

What kind of exhaust do you have?

I like it loud too...

right now, i have a 3 inch pipe, no cat, and the flowmaster 80 series...

how can i get it louder and meaner sounding?

I was thinking about adding a little glasspack where the cat used to be just to change the sound a little, but the thing is i want it loud....

Is there another muffler i should try?

Thanks

Gary

 

The muffler in my Hooker cat back system sounds great, its not too loud (course I have the stock cam) but yet its not too quiet. Its of the family of the Aerochamber mufflers.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.3 @ 97mph
(corrected for elevation)

 

I'm surprised you find it loud. I've got a 3" dynomax cat on my car, and I was shocked when I pulled the exhaust off and it was almost no louder. Because of it, I'm planning to run a 3" intermediate pipe to a split in the back and 2 tail pipes. No muffler.

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The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah

 

See if someone makes an Australian Thunder system. I hear water goes down the drain the other way, and exhaust is a few db louder in the southern hemisphere.