73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: screamin86 on October 09, 2009, 11:54:35 PM
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Well with my new motor id like to be able to hear it a little better so im gona swap out my turbo mufflers with something with a little more tone and im debating on what to go with! My cueernt setup is long tube headers custom built 2 1/2 y pipe into 3in high flow cat then y into two turbo mufflers dumped before the axle. Im thinking about going with a single muffler with 3in in and dual 2 1/2 out and dump it and posibly run tails out behind each tire. Debating on a 14in magnaflow (most expensive) flowmaster knockoff or a dynomax bullet (def run tails with this one) let me know what you guys think and if any of yall have any clips of a good sounding single exhaust that flows well let me here it please :) thanks guys
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Too bad you have a cat truck... My 77 has hooker super comps, an H-pipe and 2 glasspacks. quiet in town and roars real good when I'm on it! I've got my tips at a 45 angle in front of my tires. Has a muscle look. Don't know about your muffler tho, I like my glasspacks
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Id run true duals but its getting hard to find a place around that will inspect it now adays. When i got mine it had manifolds and 2 1/4 true duals no h or x and glasspacks straight out the rear.
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i'm runnin magnaflow and i'm very happy with it. nice little rumble cruisin around and even better tone when i get on it. im runnin a true dual setup with h pipe though.
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Which mufflers and size pipe? And sould clips? Im running a single 3in dual 2 1/2 out 14in magnaflow on my yukon and i love it!
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team39763's post about selling some mufflers "2 Flowmaster 10series single chamber mufflers. 3" in and out. One was new when I bought it, the other had been used. I put a couple passes and a couple miles on them. $60+shipping." but you gots to be a supporter to buy them
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Avoid flowcrappers,(They don't flow) and glasspacks( Makes your shoot sound like a dumptruck with a busted manifold ) get a good dynomax ultraflow, or a magnaflow, they are about the best sounding and the best flowing mufflers out there.
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Yeah i had some flowmaster 10 series on my ta for awhile 2 1/2 true duals no x or h and ended at axle with dumps. It was wayyyyy too loud! Also once i switched to a turbo style muffler the power pickwed up
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Avoid flowcrappers,(They don't flow) and glasspacks( Makes your shoot sound like a dumptruck with a busted manifold ) get a good dynomax ultraflow, or a magnaflow, they are about the best sounding and the best flowing mufflers out there.
^^^What he said. Although I do tend to favor the sound of the "flowcrappers".
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What's wrong with glasspacks? Not enough backpressure? I love the sound of them, but that's me!
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Glasspacks actually do not flow as well as many think they do and they deteriorate quickly.
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Have you tried straight pipes? I know the stock cat on my 95 was sufficient "muffler" when the muffler went I had a 3" pipe put in its place. It sure had a great sound when you stood on it yet taking it easy in town wasn't to loud. My $.02
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i took my glasspacks and put them on backwards i think it might of made them a little louder but what i had was headers true duals punched out cats glasspacks then 45% into 6"tips right before the rear tire that was back in 04 then next thing i know everyone around here had them. wernt to loud sometimes, and still had plenty of power
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I had flowmasters on my camaro and I wasn't a big fan.At the time the motor had 11.5 compression with a big cam and idled at about 1K rpm's. It sounded obnoxious to me. I installed Dynomax mufflers and loved them.
It's tough call, 20 years ago I would have killed for that Flowmaster sound.
Exhaust tone is a personal choice. My only recommendation would be on the tailpipe location/angle.
My red beater truck has manifolds with glasspacks. The exhaust tips are at a 90 degree angle and you can hear the exhaust bounce off of cars as you drive by. It's tough to explain.
My blue truck has headers with Flowmasters (it idles at 700 rpm)
and the tips are at 45 degrees. They don't have that exhaust bounce effect that the red truck has.
Hope this helps
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Yup. I've learned over the years that the guy with the loudest exhaust, is usually the slowest..lol and you want as little backpressure as you can get with a exhaust, needing backpressure is a stupid myth some one came up with years ago.
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Look into the Edelbrock SDT line. I hade them on my catted 01 Silverado and loved them. Little rumble at idle, but she would talk if you stabbed the go pedal.
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Yeah i ran my truck for a week or so after i did the current exhaust with just the cat and some 3in pipe and it was obnoxious! The longtubes and it being a highflow cat didnt helpo keep the sound down much! I have a 14in magnaflow on my 03 yukon with a intake and tune manifolds and cats(for now) and its pretty loud when i get on it and tame while cruising most of the sound you hear while cruising is the intake. The truck will be my dd mainly to work and when i go places without the family to same mileage on the yukon and so i can finish its mods. I can deal with some noise but not alot. I want something loud when i get on it and somewhat tame but good sound at idle/cruise. Turbo mufflers and catted exhaust with a cam dont sound cool at idle :) i like everyone else to hear the lope too lol
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Everyone has their own opinions on muffler sounds, I like the sound of the original 40 series flowmasters, I also like the sound of glasspacks..And, contrary to popular belief, glasspacks can last for a decade or more..Mine have been on my truck since well before I bought it 3 years ago, one of the cats has actually rusted in two and the glasspacks are still in primo condition. My uncle's truck that I'm going to buy this winter has had the same set of glasspacks on its dual exhaust for over 15 years, and they have yet to blow out.
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http://67-72chevytrucks.com/vboard/showthread.php?t=263014
http://www.broaderperformance.com/muffler_flow_tests.htm
mufflers tested on a 5.0 mustang. you can see flows where one of the worst ones for HP and torque.
http://www.andersonfordmotorsport.com/media/rumble.htm
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ive been through several exhaust setups in the past 2 years.
going from magnaflow to summit fake flowmasters to glasspacks to now Thrush welded.
from my standpoint i really loved the magnaflows but they were just to mellow.
the glasspacks were God awful obnoxious.
the summit fake flowmasters broke apart inside.
and the thrush mufflers im running now sound a bit deeper then the fake flows and talk to you at idle.
heres a couple clips of what my different mufflers sounded.
Fake Flows:
http://www.sixthsphere.com/storage2/viewer.php?file=hkh159sfi9aceibwo7zz.wmv ( right click and download )
Thrush Welded:
http://www.youtube.com/watch?v=bnLcVn_Kaa8
ive got the magnaflow and glasspack ones but their on my computer still.
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yea the two sound different, but you also change the tailpipe setup, so its hard to do a true back to back comparison.
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I tried one of the flowmaster 10's on my dually and it was loud and would shake the house when my wife started the truck in the morning. We bought a Thrush welded muffler, but it's still loud enough that you can't really speak inside the cab. The mufflers are dumped under the bed. Both mufflers sounded similar as far as tone...just the flowmaster was louder. I personally want to try the Dynomax Ultra flow welded mufflers. I heard that they are quiet and flow real good.
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Too bad you have a cat truck... My 77 has hooker super comps, an H-pipe and 2 glasspacks. quiet in town and roars real good when I'm on it! I've got my tips at a 45 angle in front of my tires. Has a muscle look. Don't know about your muffler tho, I like my glasspacks
I have a similar setup but I swapped out my turbos for Dynomax Ultraflo's. It's a nice sound. Pretty snappy too when I open it up. I have 2 1/4" pipes and 3" tips but I'd like to upgrade to a dual 2 1/2" setup.
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The ultaflo mufflers are good as well as magnaflows since they both are a straight through design. Its weird cause magnaflow mufflers seem to be quieter on the gen 1 motors for some reason. My 14in magniflow on my 03 yukon with a 5.3 really roars when i open it up and from what i hear that once i put on longtubes and my ory it will be very loud...
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i run hedman headers into true dual 2 1/2 pipe with thrush welded mufflers that exit on each side behind the rear tires a bit loud but not overbearing,you can still talk inside the cab without yelling, previously i had a burban with stock mainifolds into 2 1/2 inch pipe a thrush glasspack that exited in front of the rear drivers side tire lot more power than the cat and flowmaster exhaust that rotted off it and i personally loved the sound of the glasspack when i got on the throttle,my brother in law runs hooker headers 2 1/2 inch pipe into 2 glasspacks that exit down to the ground before the rear axle and its not bad putting around town but when he gets on it it screams and has set of car alarms sound is nice but power is the way to go thats my opinion i toyed with the idea of removing my mufflers and putting in straight pipe but im lucky i just got a 2 year inspection sticker so im good for a while
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Yeah not concerent with being too loud just enough so the cam can be heard unlike the turbo mufflers. I like the straight through mufflers
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i like the cherry bomb extreme muffler thats wat im gonna run
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I believe they are just like the flowmaster single chamber 10series
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Glasspacks!..Everybody has Flowmasters and in my opinion it sounds boring and like crap. It sounds like blowing air through a coffee can or something.(?) My 2 cents.
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I run true duals into a pair of thrush welded on my k10. They have a deep throaty tone. I personally can't stand the blappy/crackly sound you get with glass packs.
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I like glasspacks because they're simple, straight through, and not too bulky like a turbo muffler. Of course they only sound great when you do not run catylitic converters.
I guess I'm just way old school...and proud! 8)
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For now im running a 3ft pipe behind the cat with a turn down and it sounds better than the dual turbo mufflers i had but still not bassy enough but will do till i pick a muffler.
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I bet that sounds pretty mean, screamin86! I drove an 86' F150 once with just cats and a turndown. It sounded tough. Kinda like a mean raw sound.
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On a 82 I had a while back, 3 " pipe after the cat all the way back behind the wheel in stock location. I thought it sounded nice.
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Its one of those 3in highflow cats. I removed it once and the sound is pretty much the same with cat and without. With longtubes and pretty much open exhaust it does sound pretty mean. Sounds like my 82 ta with open cutout!
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Rightious! 8)
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I hate to get in on this because I know we all have different opinions on mufflers and which is the best but I have to say that I like my flowmasters. I am running longtube headers 2 1/2 pipe and flowmasters dumped in front of the axle. When I am going down the road it is quite and comfortable in the cab but when I stand on it, it sounds great!!! I am not saying that they are the best muffler but IMO they cant be beat.
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I do agree true duals with headers h pipe and some flowmasters sound awsome but they get extremly loud once you start makin alot of power and arent the best for flow but not the worst. Im still undecided on what i wanna go with.
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I'm glad everybody has different opinions on stuff because if we all thought one thing was the only way to go, then it would be boring.
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Yeah i like the flowmaster sound but dont at the same time and it is kinda boring because everyone has them! I get peiple always asking what exhaust i have on my yukon and i say magnaflow then they say oh why dont you put on a flowmaster instead
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Yeah, I really don't mean to knock Flowmasters, but they're kinda played out IMO.
Glasspacks all day, night and during lunch!
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When i got my truck it had true duals with manifolds 2 1/4 pipes to glasspacks and 2 1/2 tailpipes all the way out under the back bumper. It sounded alright and was loud when you got on it but it really needed a better tone. A h or x pipe woulda been nice too!
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The X and H-pipes really mellow out the exhaust tone. I welded my own H type thing on a 76' Cougar and it was to lazy sounding IMO.
Anyone every tried those Cherrybomb single chamber mufflers before?
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All they are are a knockoff of a flowmaster 10 series thats theyre version of a singlechamber. I ran them on my tas for awhile and a ebay knock off on my 04 dodge dakota with the 4.7v8. Sounded right on my dodge but with longtubes and no merge on my cars it was extreamly loud!
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What about those Thrush turbo mufflers? Anyone ever try those? Their cheap!
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ive got two that i had on my truck and ive got two i had for my car before i decided to part it. they sound best in a true dual design with a motor that has a lil grunt behind it imo.
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Glasspacks make anything sound like a dumptruck with no exhaust, its horrible, and with the stupid popping when you let off, plus they flow like crap. Louder doesn't = more power .
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I've got a set of thrust turbos on my true duals, i love the tone, but its a bit louder then id like for driving around
although it could have something to do with the drivers side pipe having 40 rust holes along the seam.
man i hate Canadian winters, im getting a new set of manifold-mufflers already, and I've only had the truck for 2 years... oh well lol
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None of my glass packs have had a real harsh sound, all more mellow than flows..if yours have sounded like a straight piped dump truck, you need to find a better source for glass packs. Nor have ANY of the glass packs I've run popped when you let off..my flowmasters did on my '84 gmc, but not too bad. IMO, you've purchased some crummy and/or too short glass packs if they've been popping or that loud. 28" packs are pretty mellow.
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What about those Smithy's mufflers? I guess it's some sort of glasspack super old school style? I think they only come with a 2" inlet/outlet though. They sound neat IMO. Especially with a flathead engine. 8)
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I have never been cheapskate enough to own the crappy things.But everyone when i was growning up though that was the junk to have on their muscle cars and 4x4 trucks.
somebody asked for the information on the muffler flow in my post on my exhaust setup. here it is. i just copied and pasted from a file a friend sent me.
I have listed here a muffler shootout test done by CAR CRAFT, they show the best bang for the buck, and show the db's
The Mufflers
MAKE MODEL Part No. COST
SUMMIT Turbo 630125 $14.75
THRUSH Magnum Glasspack 24214 $16.50
THRUSH Boss Turbo 17718 $23.95
HOOKER Competition 21006 $25.95
DYNOMAX Super Turbo 17733 $28.50
DYNOMAX Race Magnum 24215 $31.95
HOOKER Super Competition 21106 $35.95
SUMMIT Fully Welded 630325 $38.69
FLOWTECH Afterburner 50322 $39.95
MUFFLER FLOW TEST
MUFFLER Flow at 28-in H20
DynoMax Race Magnum 528.64 cfm
Thrush Magnum Glasspack 507.40 cfm
Summit Fully Welded 343.38 cfm
Flowtech Afterburner 342.20 cfm
DynoMax Super Turbo 333.94 cfm
Hooker Competition 232.46 cfm
Hooker Super Competition 320.96 cfm
Summit Turbo 331.16 cfm
Thrush Boss Turbo 297.36 cfm
MUFFLER Idle dB WOT dB
DynoMax Super Turbo 89 123
DynoMax Race Magnum 94 133
Flowtech Afterburner 92 124
Hooker Competion 92 122
Hooker Super Competion 90 125
Summit Turbo 89 124
Summit Fully Welded 92 125
Thrush Boss Turbo 90 123
Thrush Magnum Glasspack 92 128
DYNO TEST
All mufflers were dyno-tested on a 355-cube SBC with 10.0:1 compression, Air Flow Research 190 aluminum heads, a CompCams 292 hyd. a Victor Jr. intake, a Holley 750-cfm double-pumper, and 1 5/8 Headman headers.
MUFFLER HP TORQUE 2,500-6,000rpmAverage
Hooker Competition 397.4 381.1 286.8hp/351.9 lb-ft
Thrush Boss Turbo 407.1 384.9 292.1 hp/357.5 lb-ft
DynoMax Race Magnum 409.5 394.3 298.8 hp/366.9 lb-ft
Flowtech Afterburner 409.7 391.2 294.8 hp/361.7 lb-ft
Thrush Glasspack 409.5 389.8 297.7 hp/365.3 lb-ft
Summit Turbo 411.5 386.3 291.5 hp/357.4 lb-ft
DynoMax Super Turbo 412.7 387.2 292.6 hp/358.6 lb-ft
Hooker Super Comp 413.8 387.2 292.8 hp/359.0 lb-ft
Summit Fully Welded 415.4 390.7 295.6 hp/362.4 lb-ft
more numbers for ya'll who like numbers.
All tests via an independent lab
All tests @ 15” wc
2 “ Straight Pipe 283 CFM
2 ¼ “ Straight Pipe 365 CFM
2 ½ “ Straight Pipe 521 CFM
2 ¼” Typical Bent tailpipe 268 CFM
2 ½” Typical Bent Tailpipe 417 CFM
2 ¼” Inlet/Outlet_ Glass Pack Tips- No Louvers- Smooth 274 CFM
2 ¼” Inlet/Outlet- Glass Pack Tips-Louvered 133 CFM
Same as above set for reverse flow 141 CFM
2 ¼” Cherry Bomb 239 CFM
2 ½” Cherry Bomb 294 CFM
2 ½” Inlet/Outlet Dynomax Super Turbo 278 CFM
2 ½” Inlet/Outlet Ultraflow Bullet 512 CFM
2 ½” Inlet/Outlet Gibson Superflow 267 CFM
2 ½” Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM
2 ½” Inlet Outlet Flowmaster ( 3 Chamber) 229 CFM
2 ¼” Inlet/Outlet Thrush CVX 260 CFM
2 ½” Inlet/Outlet Maremount Cherry Bomb 298 CFM
2 ½” Inlet/Outlet Hooker Aero Chamber 324 CFM
2 ½” Inlet/Outlet Hooker Max Flow 521 CFM
2 ½” Inlet/Outlet Borla Turbo 373 CFM
2 1/2" Inlet/Outlet Magnaflow 284 CFM
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Jim, what do you consider crappy and junk? Something thats cheap is not always junk. Sometimes the big name brand pricey stuff is actually worthless. I've learned the hard way a couple of times. 8)
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I usually research alot of stuff before I buy, I'm not made of money, so I look hard to see what works and what doesn't. Glasspacks ..don't. Over the years I've done pretty good being able to look at something and know whether or not its good. yes there is some good cheap things , one example is summit turbo mufflers, for the price you can't go wrong, Snap on, Mac ETC. tools , that are more and more being made in china and the quality is no better than the chinese made craftsman tool that are priced much less. Its all in experience.
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im running 2.5 inch from my headers to my glasspacks sonds real good especially when i et it in between 3 and 4000 rpm
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what bout the cherry bomb extreme i love the sound on my 350 but i went to duals so i went with glasspacks but gonna go back to 2 extremes loud and proud here ALOT louder than flows
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Glasspacks are always my favorite. Nearly every vehicle I've owned had 'em. Matter of fact, I need to order a new set for my stepside along with my new 350, since I'm pulling the choked 250-6. Yeah! Bye bye California smog junk!!!! Ha Ha! I'm throwing the cat out on the woods!
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The glasspacks sound outstanding! Did end up throwing the cats in the woods! Ha Ha! 8)
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Glasspacks make anything sound like a dumptruck with no exhaust, its horrible, and with the stupid popping when you let off, plus they flow like crap. Louder doesn't = more power .
Jim, I'm with ya. I hate Glasspacks! I worked in a shop doing repairs and custom bent exhaust for 10 yrs before switching to Industrial work. I just can't imagine anyone wanting a glass pack.
But then I step back and look around...
Most everyone on here raving about Glass Packs is 25 or younger. 327Power was a kid when I quit turning wrenches for a living. They may have never heard the dump truck sound. I'm betting some Mfg has picked up the Glass Pack name and changed or improved the design.
Give me a Flow Master 40 series any day.
I couldn't imagine replacing the exhaust on my Yukon, It is a decent system ~ Why bother? If they only knew the crappy stock exhaust we had from the factory back 20+ yrs ago. My Yukon is a family hauler / tow vehicle and performs very well in stock form.
Dumping exhaust under the bed is Ok for a pro street truck or a work truck ~ But for something I'm gonna drive every day or use as a tow rig I can do with out the noise of the exh note under the bed ringing like a bell.
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the glasspack sound is something I've always disliked! Lol I like the sound of a 40 series but its too played out and they can be a little obnoxious loud also. I LOVE my magnaflow on my yukon but I don't like the magnaflow price. I've never seem to find a good sound clip on a cammed smallblock. I don't want anything very loud but don't want it whisper quiet either. I plan to finish my forged 383 that I started for one of my cars to put in this pickup so I want something that will flow enough for that motor and I know whatever setup I go with on my mild 350 the 383 with produce a lot more noise.
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Glasspacks sound like a wet fart.
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my truck has a 350 with straight pipes and 18" cherry bombs out the back, i think it sounds good, pretty low and mellow under 3.5-4k rpm, then nice muscle tone above that. i also have cats though so that quites it down a bit. if you want louder go with the flowmaster 40's but something interesting to note is the SUPER 40's are actually really quite. my buddy put them on his 04 silverado with a 5.3 and was very disappointed when he heard how quite they were, lol.
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I've got a magnaflow on my 03 yukon xl 5.3 and I think its one of the better sounding mufflers for a 5.3. I'm not much of a flowmaster person.
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The glasspacks sound outstanding! Did end up throwing the cats in the woods! Ha Ha! 8)
Right-on!
I know someone that lives next to a creek and whenever old car parts get changed out for new, the old go in the creek! Somewhere down stream there is enough parts to build 1.5 small block Chevrolet engines (literally), enough brake rotors and pads to start a museum, and enough nuts and bolts to open a hardware store!
"Just puttin' this here stuff back where it came from", he says. lol
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If I saw someone do that, id punch him in the face and make them go pick it back up.
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I'd grab it and go to the junkyard.
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"Just puttin' this here stuff back where it came from", he says. lol
So he got those parts from the creek? ::)
If I saw someone do that, id punch him in the face and make them go pick it back up.
X2
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not only is that bad for everything environmental, but it still has a value at the scrap yard i would rather put the cash back in my wallet where it came from
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I had a set of headers with 2 1/4 Trush glasspacks the dumped right behind the cab. Too loud. I had a set of slowmaster 40s on a 69 routed all the way the back with some tips and they would drone and resonate so badly at 35 to 40MPH that you would want to jump out of the cab.
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I have run glass packs-18" is a good length for sound-the longer the quieter.
I have run few dyno max welded and not welded-the welded lasted through one wisconsin winter and rusted through.
I am now running a mangnaflow dual in dual out crossflow muffler and it sounds good-like it-first experience with magnaflow.
I ran thrush turbo mufflers and thought they were great-surprised because of the low price.
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Well I just put a cherrybomb vortex muffler on it over the weekend. Its single 3 in and dual 2 1/2 out. I just dumped it under the bed and its a litle louder than the turbo muffler at idle but reminds me of my magnaflow on my yukon under load and when reved. so far I like it. Its a straight through muffler btw. My cousin had it on his old truck I got it for $20 :)
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Cool! Let's hear it if you can
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Ill try to get a video of it in the next week or two I've got the heads off of it right now fixing a leaky gasket and puttin on a rebuilt set of heads and diff intake.
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well i got it all back together today and got a video of her runnin. it pulls so much harder with the new heads and revs so much better with the correct springs. it still needs some tunning though i havent put the timming light on it or vac gauge on the carb yet just kinda slaped it all on and tunned by ear. sprung a leak from the old trans cooler line though i guess i should have bent two new ones instead of just one.
btw thats my dog at the begining of the video lol
(http://i285.photobucket.com/albums/ll55/screamin86/th_MOV01254.jpg) (http://s285.photobucket.com/albums/ll55/screamin86/?action=view¤t=MOV01254.mp4)
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I've been wanting a better sound out of my truck too. Something moderately loud, not too obnoxious, but louder than I have. My exhaust dumps out at about a 45 degree angle behind the rear wheels too, kinda tricky that way. I know making them turn down under the vehicle makes for a pretty decent resonating sound.
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Right now mine exits under the bed but I don't have turndowns on t though. I'm debating on getting tail pipes put on but I don't plan to run any tips though.