YES,, the turbo muffler will deliver more Horsepower than a glasspack,, the glasspack just sounds better ,,I am a glasspack fan (oh baby,oh baby),,it delivers the best neatojet sound for the lowest price ,,tho on the Fiero it is difficult to mount in the stock position .. Dyno testing by Hot Rod magazine long ago prove the high quality turbo muffler will surpass the glasspack in every test! The muffler should be mounted in the stock location.. there is more turbulence inside the glasspack It would seem the straight thru glasspack would easily win a performance shootout ,,not possible because of high internal turbulence , Turbos are named from the special mufflers on turbocharged chevy corvair,s
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01:15 PM
PFF
System Bot
Isolde Member
Posts: 2504 From: North Logan, Utah, USA Registered: May 2008
Many turbo mufflers are packed with fiberglass, so I assume you're referring to traditional Cherry Bombs, and Purple Hornies. If you want the best mufflers, Borla wins nearly every test ever done. Why? Because they really do what "Flowmaster" only claims to, they actually suck the exhaust gasses away from the engine. It's called scavenging. Plus that million-mile warranty, they are worth the cost if you're serious about performance. Sound doesn't matter. Lots of stupid people think so, but it's just their foolish pride. I know better than to care whether or not I can feel proud of how my car sounds, just so long as I'm the first to arrive at point B. Without a ticket for loud exhaust. Now, I'm not saying that Borlas don't sound good, because that's highly subjective.
[This message has been edited by Isolde (edited 02-13-2010).]
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01:22 PM
Hockaday Member
Posts: 2165 From: Clifton Park, New York, The States. Registered: Sep 2009
I don't get the logic Uhlanstan. I know that a turbo muffler on my carb'd 2.8 was a definite loser against a Magnaflow which is a stainless steel mesh straight through muffler.The turbo muffler was claiming to flow at 428 cfm. So far as I could tell it wasn't doing that.
Isolde,, how boring and miserable your life must be !!.. I Did not really expect much comment,, especially another yellow belly sniffling coward calling someone stupid because they have a different view point,, and that view is shared by a large part of the male population,I turn to look at the sound of a womans voice..many on this forum desire in thier heart for thier car to sound like it came from the Maranello Italy factory where the"" the engine provides the music"" in the words of the Factory president ,, the sound of open class motorcycle flat trackers howling is enough to arouse the vienna sausage..the sound of the Harley-davidson Idle because of the off set connecting rods... Sound ??one memorable dark early morning 40 years ago the bugles and whistle,struck fear in to my heart..I remember this sound to this day the sound of a properly set up glasspack is a joy to me,a symphony for the gearhead brain.. carressing me mentaly,,bringing forth the intellectual in me,,I am the intelgentsia when I shift to 3rd and the full song of 4000 rpm is responding to the shifter baton,clutch,,shift the baton, rpms rise,,like a Mantovani cascading string symphony ,,I am Juan Fangio the greatest racing car driver to ever live as I down shift and move thru traffic ,,the song is music ,,thinking smugly I have never recieved a muffler ticket in my 55 year driving carreer,,I am at full song ..The road is slightly hilly I,m Steve Mc queen ,up and down ,a pleasing cacopphony of sound echos from the hills,, the 6 ft blond chanteuse beside me smiles,her impish glee , I am a man in full ,to bad the Chanteuse loves my friend,corpman David Eells.. to the barracades ,,sharpen the guillotine,,Fiero owners have been into the wiffle dust again and disparage thier bretheren,,So solly itis a BLAST to drive a glass packed Fiero,,examine your integrity loyalty and honor
Arns,, this is well documented tho I doubt the info is on the net,,HOT ROD magazine did extensive testing in the mid 80s..also Chysler corp ..I only know factually,do not have actuall dyno read outs ,,luckily I found an old article I saved about EXHAUST SYSTEM LAB,,may 1987 page 29 to 38 HOT ROD magazine The advanced acoustics technology is utilized to cancel sound waves ,this is where the superior performance comes from.. the turbulence in the glasspack makes it less efficient Magnaflow,flowmaster and other performance mufflers now use the turbo sound wave principle..some use baffles, some use perforated tubing ,others baffles/plates ,tuned chambers and perforated tubing.. Borla,,tho expensive,, has been at the top of the heap for years as you know the Borla Fiero system put out 5 more horse power than the stock system in Dyno test,,a remarkable gain.since an open pipe only gave 6 hp more ..I think this dyno test was done by members of the northern Illinois Fiero club If you find a Ford Contour SVT in the bone yard,, get the mufflers from it,,they are a Borla clone and sound great.. I find it difficult to beleave that the straight thru glass pack is not the Horsepower winner ,it ismy fave,,it is not.. Finding a Fiero similar, used or new Borla muffler would free some pony power in any engine installed in a fiero Always lead with a male connection into a female (only at a neck down for reversion would this not apply) One day I will find where the perfect neckdown is for any 60o V6,,a matter of math & trial and error..some one else will do the math..ha ,ha
[This message has been edited by uhlanstan (edited 02-13-2010).]
....Craig..It is a design ,,a common name now ,quality varies,the name comes from a muffler Chevy & G.M. developed in the 60s for a turbocharged Covair.Chevy found that tubulence in the straight thru glasspack hurt performance ,because the slotted inner constrution creates back pressure & turbulence ,so they developed a muffler that used the exhaust waves to smooth flow and assist the exhaust gases to escape freely,,In the case of turbo mufflers you get what you pay for .. ... The turbo muffler uses advanced acoustics technology to cancel out sound waves ,, the low restriction design combines tuned chambers & perforated tubing with baffles and plates that also assist in sound control,,often packing is added to decrease noise.. The most expensive turbos are more intricate design to give a more free flow exhaust,& max noise suppresion these are more expensive to make.. .. a turbo muffler should be mounted close to the stock Fiero muffler position,,many have glass packing and heat destroys it some like flowmaster use plates that cause the sound waves to collide with each other ..this helps cancel out the sound with minimal flow restriction.. ..Extensive testing was done by Chevy,Pontiac Borla .Magnaflow ,Flowmaster ,Thrush.. the testing that benefited Car Crafters pocket books was done by HOT ROD magazine in the 80s.. .. I posted because I was asked by a new member ,,I based this post on old info BECAUSE it was the best.. I recomend Borla mufflers because RECENT test and Fiero dyno test showed Borla to give Top performance..Borla,s are expensive,,I,m to cheap to buy one ... I run Glasspacks,,never had a ticket .. The bestest easiest power increase for a Fiero is thru the exhaust system..The blockage in the exhaust manifold system restricts any gains from internal performance modifications.. ..Craigs part is over..Arns knows more about Fieros than I ever will .. this is for the others ,of course I am a peace loving man ,NOT my friend and my dueling second,,, Doctor James Licktieg (former,LEO,& martial arts akido master ) says I should ignore all long distance slams unless delivered by a gentleman or a man of integrity,, .................................................... aksamio nesan !!
[This message has been edited by uhlanstan (edited 02-16-2010).]
THERE IS A LOT OF INFO AND COMPARISON TEST..available you must have patience to search thru all the data.,,some of the australian comparo stuff does not load properly the material posted by the individual on speedwaybids was taken from a magazine test ,,I can not remember which one may have been Car craft
Google this just as I wrote it,,go to "speedwaybids" comparison it will be about 5 to 8 down there are others with more in depth info..I do not have time now to find them this will give you a good Idea.. many dismiss mufflers as performance producers ,CONTRAIR you can increase horse power as much as 20 HP modifying the stock 2.8 system most gearheads recieve 10 to 15 horsepower.. Properly modifying the Manifolds (not easy) Y pipe and following system gets you to the high end .. there are a lot of ponies that can be released using old gearhead tech like porting,,matching,proper assemblie,, the correct parts and your wallet is lighter only a few hundred dollars ,precise timing,proper spark plug tightening/setting with electrode facing correctly,,make sure your exhaust pipes are male to female free flowing
[This message has been edited by uhlanstan (edited 02-16-2010).]
Uhlanstan, I still don't get it. The Magnaflow website has comparative dyno sheets for a whole whack of Chevy engines including Camaro, and Corvette and they are showing an average of 15-18 hp increase using their CAT back systems over stock.
Now the Corvette system is pretty much a turbo muffler. They are still showing a significant increase and the Maganflow muffler they are using is a straight through perforated pipe with stainless steel wool instead of glass pack.
I know that some magazine got paid some bucks to promote Dynomax or some other maker a few years ago, but, I just doubt that Magnaflow is publishing falsified info on its website.
Have you got any current data to back up your claims?
Just had to ask.
Arn
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10:03 PM
Feb 15th, 2010
Hockaday Member
Posts: 2165 From: Clifton Park, New York, The States. Registered: Sep 2009
i'd still go with a megaphone or disc muffler, those are the only choices imo. they're basicly identicle but the disc muffler is tuneable and a lil quieter.
Arns,I like magnaflow ,I was not knocking your choice of muffler ,sorry I was not clear,,the reason I commented about the old HOT ROD article ,,It was the industry standard and many other magazines commented on it ..there is NO comparable information today.... This HOT ROD article just proved that pulsewaves could be used to improve muffler performance and the scoftflaws like myself grudgingly admitted it worked ALL the major muffler manufacturers use pulsewave tech now in the manufacture of thier performance mufflers,,including Magnaflow PRICE has a lot to do with the top producers, I did point the way in an earlier post to dyno results,,check this out.. ....RESULTS ARE NOT ALWAYS THE SAME ,,IN DYNO TEST BUT THEY CAN GIVE YOU AN IDEA OF WHAT WORKS,, manufacturers use info that shows thier product to best advantage,, pulsewaves are the only way to get the 2.8 up to a point where it would come close to the stock 3.4,,But no one is going to do the work involved for a dead engine design. ..when I ported my exhaust manifolds ,,I even smoothed the difficult to reach area in the logs where the final weld is the stock fiero V6 can be made to perform MUCH better with dual exhaust and the proper neck down location.. the muffler should be in the stock location,THE best performer on the market,,you could use one dual intake !!,the neck down should be about where the front of the cat is.. the duals would have an X patern cross flow(cross over) a foot behind the neck down. If I ever escape the poverty I work so dilengently hard to achieve,, my 2.8 will develope 135/140 horsepower at the rear wheel,(about 120now),doing only porting,port match and exhaust modification,, the Y pipe will be eliminated,and a modern muffler will be used in place of Glasspack My purpose is better town fuel economy as the V6 2.8 has more than enough power for the creep and go driving & occasional light to light race with a spunky granny I do
[This message has been edited by uhlanstan (edited 02-16-2010).]
...The purpose of this post was only to inform fiero owners that a properly design muffler will produce more power than a glass pack.. I am a glasspack fan .. ...Dyno testing proves a properly design muffler using pulse and wave tech ,, will out perform a glasspack ,,SO,, the only reason to run a glasspack is sound..
,...Just look over the test info,,and when ready to buy a muffler ,, return and see if thier is more recent information ,,or a more recent comparo test. a Muffler that is more free flowing ,,will give better gas milage.. Test done with smaller pipe is what would most apply to 60o V6 ownerssuch as the majority of Fiero,s have ..
[This message has been edited by uhlanstan (edited 02-16-2010).]
