I have Flowmaster 80 series muffler on my 87 bird with 305 and my car doenst sound near to what I want it to sound. Does anyone have any suggestions like gutting my cat, or opening my exhaust some how?

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87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
3 inch tips
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
"General Tires" P215/65R15
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

if it's a new muffler it needs time to break in, also you may want to consider a hi-flo cat to boost your sound output. My car is very loud with the flowmaster 80 series i have but it took about 6 months to get this way. What happens it the metal baffels heat up expand and then cool down and contract everytime they do that they get smaller or bend forward alittle letting more flow and sound to be released.mI have an mp3 if you want to listen to my exhaust.


Robert

 

headers, 3" "I" pipe, 3" cat or 3" pipe in place of cat.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

Wow that exhaust setup sound fimilar..

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Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

 

Give it time, it will get louder. All I have is a cat back with a high flow cat and its hella loud.

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1988 Jet Black IROC
5.7L W/ 64000 miles
Flowmaster Exhaust
Fully Loaded
------------------

My IROC In Readers Rides
My IROC

 

mine got louder when i actualy put some 3.5" tips on that exited behind the car instead of underneath, well atleast its louder OUTside the car.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

 

replace the cat with a pipe or gut it you wont be dissapointed trust me!! drving with it in any gear around 2000-2500 rpms sounds nice as $hit!!

 

replace the cat with a pipe or gut it you wont be dissapointed trust me!! drving with it in any gear around 2000-2500 rpms sounds nice as $hit!!

 

ya, 2000 is probably the best sounding range, especialy right after it shifts and ur just kinda idling. but if u gut the cat and you have to have a cat for visual emisions, then put a pipe inside the cat to make sure u dont' have any turbulence.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

 

ok, well Ive had this muffler for quite a while and I could tell it is a little louder than the day it was put on, which was early February. So Ive had it on for about over 7 months. I have 2 1/2 piping with 2 1/2 inch tips, and I think my cat is the original...so I should probably put a high flow cat on. Im not getting headers soon although I would like to. My car is an 87, is it illegal to have no catylitic converter on your car for this year model?

------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
3 inch tips
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
"General Tires" P215/65R15
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

I think u guys misunderstand the muffler. Throwing on a muffler is not gonna make ur car sound awesome.... Ricers throw on fart pipes to make there cars sound dumb. Flowmaster designed this mufflers for air flow not noise. So if ur gonna want more noise, ur gonna have to go with a bigger cat-back and headers w/ or w/o a catalytic converter.

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Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

 

actualy, there is ALOT better mufflers then flowmaster as far as air flow goes, my last muffler was alot quieter then my current Flowmaster, and it was a staight shot through. unlike the flowmaster with manny baffles, yes flowmaster's flow better then stock, but then again they can be considered sound chambers more then high flow mufflers.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

 

"Throwing on a muffler is not gonna make ur car sound awesome"

Of Course it does.

------------------
1988 Jet Black IROC
5.7L W/ 64000 miles
Flowmaster Exhaust
Fully Loaded
------------------

My IROC In Readers Rides
My IROC

 

__________________________________________
"I have Flowmaster 80 series muffler on my 87 bird with 305 and my car doenst sound near to what I want it to sound"
__________________________________________

Well, this could be because Flows kinda have their own distinct sound, and it just might not be the one your looking for. They kinda have the hollow/gurgly sound, is this what you mean your not looking for? I like them myself but its all a matter of opinion and what you want your car to sound like.

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88 Camaro (The mighty LO3 SC!)
305TBI/700R4/2.73/123,XXX miles
14" Open Element and Flowmaster 80 seires

Next up: headers and gears

 

I want something that makes my car sound really loud, something that you cn hear a few blocks away. Something that when I go to school I can ramp the crap out of it and pop everyones eardrums.

------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

Then u don't need a muffler.....at all.

------------------
Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

 

Is that illegal?

------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

A quick question on taking out the cat:

I have an 83 Z28 with a quadrajet carb and the computer.. I don't see why the car has both a computer and carb (don't computers control fuel injection systems??) but my question--if I take out the cat., will my "check engine light" constantly be on?

 

Needing a muffler or not depends on your state and sometimes even county.

------------------
-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

basicaly, all you HAVE to have is some sort of sound absorbing equipment, dosen't matter what it is, it could been a 2" resonator. (yes 2 inches). just as long as it isn't too loud for your area. thats what the guy at the muffler shop told me. as long as you have SOMTHING, doesn't really have to work.

------------------
- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

 

My 85 Z with an LG4 had a 3" 80 series muffler and i was pleased with the sound. It wasnt too loud, but u could still hear it. I liked the actual exhaust tone, not too tinny like ive heard people complaining about, it had a nice growl at WOT. but soon ill be swapping that out in favor of a hooker catback.

 

what is "WOT" ? Im thinking of geting a hooker catback also.

------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

1. "WOT" = Wide Open Throttle

2. I'm getting ready to put on a MAC Cat-back system, a friend of mine has it on an 86 305 TPI and it is very loud and makes the "crackle(s)" after you let off the gas. It is also supposed to be one of the highest flowing systems. They say it added like 40 hp on a Camaro, but I woulden't expect more than 20. I've heard soundclips of a Hooker Cat-back and it sounds good also. I am yet to hear it on the road though.

 

"and makes the "crackle(s)" after you let off the gas"


Are you saying that as a good thing

I wouldnt want my car doing that, but thats just my opinion

------------------
1988 Jet Black IROC
5.7L W/ 64000 miles
Flowmaster Exhaust
Fully Loaded
------------------

My IROC In Readers Rides
My IROC

 

what that is, is the sound feedback from the exhaust going through the system, when too much air is trying to get through the muffler and cat, etc. BTW what is a "MAC" system, is that the brand or an acronym of the brand?

------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

Want loud, do this. I've got a 80 series muffler on my 350. Sounds wimpy and I think my cats are punched. Wanted louder so I went to summit catalog, went under exhaust, got a summit exhaust cut-out. Couldn't put it in front of the cat so I had the shop weld it between my cats and my muffler. Damn does it sound great. Really really loud especially at wot. Sounds like abig block when I get on it. At idle the car shakes feels like muscle. Very nice deep, very deep sound when cruising between 2000-2500 rpm. I recommend this setup if you want a very loud great sound. And if you get tired of listening to it, just put the plate back onto the cutout and screw it in witht he three bolts.

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• Red '91 Z-28 350
• 700-R4 Trans
• T-tops
• no major power
  gaining mods, K&N
  Filter, Flowmaster
  exhaust -series 80-,
  exhaust cut-outs
• Best E.T.= 14.7@93.8mph,
• HardlinePerformance
  [URL=http://www.hardlineperformance.8m.com/propics/camaro2.gif[/URL]

 

Mac is a brand. The crackel is usually the fuel buring in your exaust causing a poping sound.

------------------
-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

The last guy I heard that had an exhaust cutout, had his floorboard catch on fire from it. Heheh, so be careful, you might be buying some new floormats soon.

------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

How was the installation of the 80 series? was it a direct fit to the stock cat-back? What did you use for the tail pipe?
Thanks..

 

I dont have a cat back, and all they did was replace the stock muffler with the flowmaster 80, the flowmaster 80 is a cross flow muffler that allows one muffler with one inlet and two outlets. I put new 2 1/4 inch pipes on with 2 1/2 exhaust tips.

------------------
87 FireBird Formula
305 4bbl LG4
K&N Filter
Flowmaster 80 Series
Holley Quadra-Jet 650 CFM 4bbl Electronic Carburetor
P215/65R15 Tires
-----Need Upgrades-----
--Give suggestions plz--

http://members.tripod.co.uk/michigan34/car.html

 

for my lg4 i purchased the flowmaster 80 series and then bought dynomax 2 1/2 in. exhaust tips. I left the stock i-pipe on there(stupid) though. The tips slid right in perfect, but the i- pipe is only 2 1/4(at least on mine), so the shop had to do a little extra welding to get it to fit. I stil have manifolds and a cat and everyone at school says my cars the best sounding one there.

(shows it takes very little to impress us kids these days )

Brandon

 

i got an 80 series flowmaster, i had it one my car for about a year and to this day i haven't noticed any difference in sound and to this day i HATE it, i'll have to say it sounds great from idle-1500 (give or take a few hundred) but after that it sounds like an annoying drone and who drives with the RPM's under 1500

so what if a take a torch and get the inside really hot and then hose it off and do it again, i mean i could care less about the muffler since i took it off and like the sound better but i want the tips back until i get my custom exhaust.

 

if you want nothing but loud..you could always get an exhuast cutout...and still have your flowmaster on. If you get a cutout and buy a electronic McCord Power Plate a Quick Time, or whatever, then you could even tune how loud you want the cutout...by the flip of a switch.....geez I've made so many people mad at me with my cutout open! I was at a parade and a lady cussed me out because she said that I was going to make her child go deaf...and she was really yelling at me...yikes..

 

well with trying to save up for a $1400 custom exhaust (headers back) i really don't want to spend another 100 or so on an electric cut out. i just might cut open my 80 series and take some of the **** out that's in it and have one of our body shop guys weld it back up.

 

i tihnk that if your foot is to the floor, the flowmaster 80 series sounds liek a **** rocket. i hate that sound. id much rather have a 40 series!

 

i thank u for saying that bcuz u r the ONLY person that has agreed with me about the 80 series.

the place were i'm getting my custom exhaust done is using flowmaster 40 series but he sed he can still get it with a dual outlet like the 80. i'm sure about that

 

never heard of that one....but I agree that a 40 does sound ALOT meaner then an 80 series. My friend had a 40 on his 91 Z28 and man, I tell you...it sounded just like an old school muscle car....very loud and very aggressive. The exhaust shop he went to moddified his tailpipes so he could have dual outlets....I'll ask him how they did it. I like my 80 series too though.....it sounds good, just not near as loud as the 40...but my cutout makes up for that.

 

well a guy at my work has a 94 Z28 Lt1 with the 80 series and i like it on his car. but it's also a 350 with more hp and exhaust flow than my L69, like i sed b4, my 80 sounded like a loud drone above 2k

 

Wow, you guys sure you got an 8 under your hoods?

 

ya i'm sure, 305 4 bl HO stock exhaust other than the muffler, but still, it is a drone, i have a vid with my muffler off but have no way to post it or i would. no muffler sounds ALOT better

 

i ripped open my muffler tonight and WOW.......i have no idea y this muffler sounds bad and isn't louder than it is, this pic i made (in 1 min) shows basicaly what's inside. i'll try to get a real pic tomorrow. the bottom left hole is the inlet and the top ones r the outlets.

 

84customZ28, did u ever find out how your buddy got his pipes moded to get duals with a 40 series?

here are pics of my gutted 80 series the yellow lines show where the walls were in the muffler

 

closer pic

 

that poor Flowmaster, you coulda got some $$$ out of that on ebay



I'm about to find out what an 80 series sounds like on a built 355, i plan on making a clip when i'm done......

 

i really didn't care about the muffler, hell i was willing to give it away to a buddy of mine who has a 00 z28 but he didn't want it. they sound bad *** on 350s so it'll sound good on your 355

 

Two words, Compression and cam. These will make your car loud no matter what exhaust you have. Yes the cat-delete makes a HUGE increase in the sound. I had an 80 series on my 90 Vortec motor and it was loud as hell all the time. I put it on my 89 TBI 305 stone stocker and you almost can't tell a difference from the stock muffler unless you are reving it, and it is still quiet. I also have a cutout on my 90 Vortec motor and it is race car loud, like to where you have to plug your ears or they'll bleed. LOL

 

well, i just got back from the muff shop and i guess it sounds ok, a little quieter than i'm used to but it still has a nice tone to it.

i'll try and get a sound clip tomorrow

 

Give it time

 

yup many other factors that makes a car sound good, ie. cam, size, etc.

I learned after getting my exhaust it gets louder after it breaks in. I made a stupid little video of a before and after if anyone wants to see it.

right click and save as

 

haha, nice video. i need to make one sometime


and yes, that is much better. :hail: