I now have proof that flowmasters suck

[Wagonized]

and ultraflows own all

http://www.svtoa.org/articles_006.htm

[89vert]

and ultraflows own all

http://www.svtoa.org/articles_006.htm

even if they do suck they sound wicked

[90_IROC]

id like to see where magnaflow stacks up against those brands in a test like that 8)

[iroc22]

id like to see where magnaflow stacks up against those brands in a test like that* *8)


magnaflow will have very similar performance compared to the Ultraflo mufflers since they basically copied their design lol

Ive been trying to tell people for years that Dynomax owns all...even their turbo mufflers outflow most other brands top flowing mufflers.

Why do you think Dynomax publishes all their flow numbers for all their mufflers while other companies dont

[79 Z28]

there is one key factor that everyone forgets here, mufflers flow air not water, all straight muffler designs will obviously flow water better, but too bad its a gas that goes through a muffler. flowmasters are a chambered design with low pressure points that cause scavenging and air velocity out the muffler. when you fill the damn thing with water all it does is fill the chambers up with water and doesnt flow. so untill the muffler is required to flow liquid, those water flow tests are totally misrepresenting. most people dont realize htis though and look at the flow numbers and say shit :ohboy:

[Wagonized]

there is one key factor that everyone forgets here, mufflers flow air not water, all straight muffler designs will obviously flow water better, but too bad its a gas that goes through a muffler. flowmasters are a chambered design with low pressure points that cause scavenging and air velocity out the muffler. when you fill the damn thing with water all it does is fill the chambers up with water and doesnt flow. so untill the muffler is required to flow liquid, those water flow tests are totally misrepresenting. most people dont realize htis though and look at the flow numbers and say shit :ohboy:

fair enough but a 2200 vs a 392 is quite a difference air or water.

[79 Z28]

there is one key factor that everyone forgets here, mufflers flow air not water, all straight muffler designs will obviously flow water better, but too bad its a gas that goes through a muffler. flowmasters are a chambered design with low pressure points that cause scavenging and air velocity out the muffler. when you fill the damn thing with water all it does is fill the chambers up with water and doesnt flow. so untill the muffler is required to flow liquid, those water flow tests are totally misrepresenting. most people dont realize htis though and look at the flow numbers and say shit :ohboy:

fair enough but a 2200 vs a 392 is quite a difference air or water.*
like i said, chambered mufflers, they just fill with water and dont flow, a straight through muffler is a clear shot to the other side, water will just fall through. its not a comparable test, gas has a completly different characteristic then water. sure is a far superior water muffler but what about a gas muffler?

[flowmaster]

i will believe everyword yo usay when you show me flow charts from flowmaster :p

[79 Z28]

if your talking to me, then ill tell you that you cant flow air and accurately measure it, the only way to truly test a muffler is to dyno

[Mike K]

If you want to find out if your muffs are good enough for the power you have then use this simple formula.

HP of your engine X 2.2 equals cfm required.

So if you have 500 hp(which everyone has ::), you need 1100 cfm of flow in the total exhaust.That's 550 cfm from each muffler in a dual muffler system(granted everything forward of the muffs don't hinder flow). Any more is a waste and any less costs power.

David Vizard designed some zero loss exhaust systems for some racing and high hp street cars and tested a bunch of mufflers....some being the ever popular 2 1/2 in 3 chamber flowmasters. His results were 290 cfm on a muffler dyno. That means that the flowmasters in mention flow enough air for zero loss on a 265 hp v8 (read stock 5.0 rustang)and on anything more powerfull (read small block chevy)the flows,(2 1/2" 3 chamber) ,cost power. A 3" flowmaster isn't much better beacause it's not 3" all the way through.

The best flowing mufflers are ones that continue the same diameter from the inlet to the outlet and most of the chambered or delta-flow kinds don't. That's why I like my dynomax ultraflows. I can see right through them, they flow the same as a 3" open pipe, and they don't make your ears bleed inside the car.

Do flowmasters suck? I have one on my 95 but I'm going to rip it off one day. I wouldn't put chambered ones on anything I own ever again....unless I bought a mustang :ohboy:

I just looked at the link Wagonized posted and it looks like my mufflers flow the best. It's all in the design.

[79 Z28]

makes sense what you said but the cfm in question is flawed. basically your ramming water through something thats meant for gasses and you have low and high pressure area due to this causing scavenging and working the way its supposed to. hot gas works way different then water. hp and track times are the only way to test a mufflers ability. all you gotta do is, dyno a motor with a tuned race header exh. then bolt on an exh on the engine dyno then see the power difference.

[Wagonized]

makes sense what you said but the cfm in question is flawed. basically your ramming water through something thats meant for gasses and you have low and high pressure area due to this causing scavenging and working the way its supposed to. hot gas works way different then water. hp and track times are the only way to test a mufflers ability. all you gotta do is, dyno a motor with a tuned race header exh. then bolt on an exh on the engine dyno then see the power difference.

you're getting your engine dynod soon arent you? perhaps an experiment ? :cool:

[89vert]

i have to agree with jason

i don't know much on the subject of muflers and flow,
but i think what he means is it acts like a venturi effect in a carb
increasing the velocity of the air leaving the mufler

[79 Z28]

makes sense what you said but the cfm in question is flawed. basically your ramming water through something thats meant for gasses and you have low and high pressure area due to this causing scavenging and working the way its supposed to. hot gas works way different then water. hp and track times are the only way to test a mufflers ability. all you gotta do is, dyno a motor with a tuned race header exh. then bolt on an exh on the engine dyno then see the power difference.

you're getting your engine dynod soon arent you?* perhaps an experiment ?* :cool:
yea i am, unfortunately i have no flowmasters to test. im running theses oldschool racing mufflers on the car, but the dyno will be all open exh. :noes:

[Wagonized]

makes sense what you said but the cfm in question is flawed. basically your ramming water through something thats meant for gasses and you have low and high pressure area due to this causing scavenging and working the way its supposed to. hot gas works way different then water. hp and track times are the only way to test a mufflers ability. all you gotta do is, dyno a motor with a tuned race header exh. then bolt on an exh on the engine dyno then see the power difference.

you're getting your engine dynod soon arent you?* perhaps an experiment ?* :cool:
yea i am, unfortunately i have no flowmasters to test. im running theses oldschool racing mufflers on the car, but the dyno will be all open exh. :noes:

oh i thought you were going to run flowmasters this year.

you're using those straight through bullet style mufflers that you posted pics of a few months ago? 3 inch on one side and 3.5 on the other?

[79 Z28]

makes sense what you said but the cfm in question is flawed. basically your ramming water through something thats meant for gasses and you have low and high pressure area due to this causing scavenging and working the way its supposed to. hot gas works way different then water. hp and track times are the only way to test a mufflers ability. all you gotta do is, dyno a motor with a tuned race header exh. then bolt on an exh on the engine dyno then see the power difference.

you're getting your engine dynod soon arent you?* perhaps an experiment ?* :cool:
yea i am, unfortunately i have no flowmasters to test. im running theses oldschool racing mufflers on the car, but the dyno will be all open exh. :noes:

oh i thought you were going to run flowmasters this year.

you're using those straight through bullet style mufflers that you posted pics of a few months ago? 3 inch on one side and 3.5 on the other?
yea one side is flanged for big block and the other for small block, the actual tubes are 4.5" in diameter if i remember correctly. they are from 1970 and used to be the cats ass in racing lol, unfortunately i dont have clearance for the flowmasters right now without fabbing up a hardcore exh setup because of the ladder bar stuff. and it saves me 200 bux for new mufflers. its gonna be LOUD. ill have to angle turndowns into eachothers path to quiet it down

[sleepybu]

since when is water used to flow test muffs :noes:

[Mr. TroPiCal]

Like steve said..they sound awesome...wanna take a gander at my 3" off-road flowmaster...it bleeds ears...

anyways, how much hp is there to gain anyways...and a little back pressure is a good thing (on the ls1's anyways)...

if anyone is that worried about flow, cut your fuckin muffler off and run a straight pipe, problem solved

[epikz]

id like to see somone experiment on this, because it seems like this is just everyones openion and there is no facts here.

[79 Z28]

if i had several mufflers to test i could at the dyno :noes:

[sleepybu]

if i had several mufflers to test i could at the dyno :noes:


when whould you need them and what size pipe :naughty:

[79 Z28]

3" inlet and outlet, has to flange onto collector though. dont worry about it, its too hard to get several mufflers that will fit and then the flowmasters, it would be plausable if i was gonna run them right now but i got other mufflers :(

[Wagonized]

i might be able to have a couple dynomax ultraflows for you...depending on what you get dyno time

[79 Z28]

in a week or so lol 1 day, to break in motor, tune it and nos it :(

[Bryce]

David vizard bases most of his infomation on "what he thinks" not actual fact

The best mufflers out there are hooker aero flow's period gas reacts completely different then water the idea is to have an exhuast system that swirls because it will move much faster and retain more heat as well as create its own vacume much like a tuned pipe

I have seen very few mufflers that work on this idea hooker aero flows do the design of all the mufflers in that test slow down the speed of your exhaust by disrupting the spin of your exhaust and then blocking it off

water is far too dense to spin at any similar rate and will never be acturate test the best way to do do it is to test all the same mufflers on the same engine

I wont buy any other muffler then a aero flow ther is no point they are quiet they sound the best and they make you gain torque and loose no horsepower (over headers and straight pipe) best way to go

[89vert]

80 series flowmaster with 3"x24" tips sounds so sexy
i almost cum when i start my car :)

[79 Z28]

80 series flowmaster with 3"x24" tips sounds so sexy
i almost cum when i start my car :)
i got that on my 3.8L it soesnt make me cum though :p :D

[66chevyIISS]

My Aeroflows are FAR from quiet :rofl:

[79 Z28]

My Aeroflows are FAR from quiet* *:rofl:
turds :D

[Zion]

the first time i started my car, i had to change my pants :cool:

but really, i run flowies, and if i can see definitive proof that borla or dynamax sounds and produces more HP then i will switch.

[dg]

all aftermarket catbacks will give you similar gains, get what you like the sound of.. also stainless steel catbacks will last longer

[nodd89]

sooo....whats loud, sounds good and cheap...

[79 Z28]

sooo....whats loud, sounds good and cheap...
flowmaster, they just came out with a new muffler too, its called the super 40. even higher flow

[nodd89]

as long as im heard :kekeke: