i just put mine in, its nice and deep, ive read a few of you that say it starts sounding better after a while, how many of you guys have noticed this, and how long does it take

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Trent
---Car---
89 Firebird/305 L03 TBI A4/t-tops
Open Element Edelbrock Aircleaner w/ K&N air filter/Summit Chrome Valve Covers
Edelbrock TES headers 3" out/flowmaster American thunder 3" exaust/Catco cat
---Stero---
Pioneer DEH-P730 Premium
Infinity 2way 4652 4x6's/Pioneer 4way ts-a6985 6x9's
profile cl640 110x4

 

Sweet your running the setup that im thinking about getting, except im gonna go with Hooker Comp. headers. Tell me how you like it. I have the LG4 engine, though.

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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.

Future Mods: Flowmaster American Thunder 3 in. Cat-back, Catco High Flow Catalytic Converter, Hooker Super Comp Shorty Headers Jet Hot coated, K&N Air Cleaner, CompCam 264H, White Paint, IROC wheels, Alpine CDM-7871 CD player, Polk Audio speakers, Grant GT Rally Steering wheel,New Fuel Pump, Ground Effects, B&M Megashifter

 

It will get noticeably louder,every Flowmaster I have had and have currently take awhile to break in.It depends on how often the car is driven.You will know when it finally breaks in,don't worry.

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1982 Z28:355,4 Speed,Lots of bolt ons

 

Mine took about a month to totally break in, and my mom said the last time time I backed out of the garage the windows were rattling Thats with manifolds, too! Cant wait to get headders. This single out really impressed me.

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Chuck Kulchar
1991 RS
Open Element w/K&N
3" cat and Force II cat-back

 

Mine took about a month to break in. It goes from somewhat rattly and metallic, to very throaty and growly yeaaaa... oh, and do a couple heavy-foot runs, like hittin' 4500+rpms through first and second gear every once in a while... it seems to help the muffler break in... also sounds kick @$$ after a hard drive... even deeper. hehehe... props 4 goin' with Flows!

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Brian P.
'91 TransAM: 305TPI -=flowed=-

 

months

 

What, How do you break in a Flowmaster, there all metal consruction. Dynomax's only get louder because the deadening material settles, I don't know how a all metal Flomaster could break in nothing should move internally.

[This message has been edited by CODY BEHNKE (edited November 01, 2001).]

 

MetKiss316, it sounds GREAT, nice deep, all my friends say its awesome, parents too, im just hoping it gets even louder, because i realy want to turn some heads

thanks to all of you that answered, im prolly going to be driving it for about another month, then in the garage she goes, hope it will be broken in by then, and i do drive it about 30 miles every day, soo

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Trent
---Car---
89 Firebird/305 L03 TBI A4/t-tops
Open Element Edelbrock Aircleaner w/ K&N air filter/Summit Chrome Valve Covers
Edelbrock TES headers 3" out/flowmaster American thunder 3" exaust/Catco cat
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Infinity 2way 4652 4x6's/Pioneer 4way ts-a6985 6x9's
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Mines been pretty damn loud right from the time I got the engine running with it on .....

It was REALLY loud when I had a PROM in there that was *less than ideal* for my engine........

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1987 GTA L98 MD8
355, TFS Heads, LT4 Hot Cam
My GTA

The Minnesota F-body Club

 

mine sounded a little different after time...but then again sometimes it sounds like it was brand new...who knows.

does anyone have specifics on how this "break in"actually happens? i am a little skeptical...i mean it is just a muffler.

the only thing that i can think of is maybe there is like a carbon buildup on teh inside of the muffler that will absorb sound a little differently?

anybody know for sure?

-Brian

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1991 Camaro RS
GMPP 350 HO crate engine - 454 TBI, MSD ignition, SLP exhaust, everything is new
700R4 - 2,400 stall converter, vette servo, shift kit
My car's webpage - z28boy.cz28.com
President - Central New York F-Body Association
Email - z28boy@twcny.rr.com
AIM - "Z28 Boy"

 

Like I said in my last post I dont think that anything breaks in on Flomasters something would have to phisically move to make it louder.

 

its probably carbon buildup. I didn't believe people either till I noticed it myself. That didn't happen with the flowmaster on my jeep. It sounds the same as ever. The one of the Firebird definatly got louder.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

It's the muffler bearings! They start to wear out after a month or two, and the muffler makes more noise. Remember to replace the muffler bearings at regular intervals.
I vote that the flowmaster getting louder thing is crap. I own the american thunder 3" system, and it didn't get louder. That other guy is right, it's all metal inside. Carbon on the aluminized walls on the inside of a muffler will not make it louder.

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No guts, no glory.

 

I actually *heard* that from being used the baffles inside the muffler start to bend and melt some and that changes the sound after a while. I don't know though.

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89 RS
STILL Looking For:
An 87 IROC-Z28 350 TPI

Yeah I have an RS, but I want an IROC-Z!!

 

yup mine got louder..I have an 80 on my car (took about 3 months I drive it very little) and a 40 on my truck..took about 8 weeks

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1988 Sport Coupe 305 TBI
K&N
Flowmaster 80


Daily driver:
1988 K1500 5.7 4x4 shortbed flowmaster cat-back gutted cat.
AIM: RyanNH84

 

I'd agree,the sound flowmaster puts out is one that gets better with age.A complete catback system in 3"(including cat)is hard to beat in performance,sound and value for the money.I have the 3"cat,intermediate,and dual out muffler-just awesome.A nice DEEP,loud sound,but not too annoying!

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*1989 IROC Z(White)
>305 TPI/700R4
>Flowmaster 3" Catback
>K&N Filters
>50k miles

 

I don't know about it getting louder over time, since I installed headers about a month after putting the american thunder system on, but it certainly got a hell of a lot louder after header install. My car sounds 10x more capable than it is.... it sounds like a beast. Everyone agrees that my car is one of the baddest sounding rides around here.

Jon

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89 GTA
Beautiful Gunmetal gray, LB9 305 and T5 tranny. Only 60,000 miles!
Dual cats, 3"flomaster
Accel 300+ Ignition, wires, cap, coil, etc
Airfoil
KN Airfilter
Removed Screens on MAF
SLP 1 3/4 headers
No Smog/AIR system
14.7@93 (I know i should be running faster...)

91 Ford Thunderbird. My wonderful winter beater.

 

my friends also tell me that my car sounds like an old muscle car, sounds better than any other car in my school

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Trent
---Car---
89 Firebird/305 L03 TBI A4/t-tops
Open Element Edelbrock Aircleaner w/ K&N air filter/Summit Chrome Valve Covers
Edelbrock TES headers 3" out/flowmaster American thunder 3" exaust/Catco cat
---Stero---
Pioneer DEH-P730 Premium
Infinity 2way 4652 4x6's/Pioneer 4way ts-a6985 6x9's
profile cl640 110x4