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  • some muffler test info

    The results in HP order:
    1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
    2.Bassani Real Street 373.7 hp/ 333.8 tq
    3.Hooker Maxflow 373.5 hp/ 333 tq
    4.Borla XS 373.3 hp/ 332.6 tq
    5.Magnaflow 372.8 hp/ 332.5 tq
    6.MAC 372.3 hp / 331.5 tq
    7.Flowtech Afterburner 372.3 hp/ 330.1 tq
    8.Hooker Aerochamber 372.1 hp/ 330.4 tq
    9.Bassani 372 hp/ 333.5 tq
    10.Spintech 371.6 hp/ 332.2 tq
    11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
    12.Borla XR1 370 hp/ 334 tq
    13.Flowtech Terminator 369.5 hp / 331.3 tq
    14.Dynomax Ultra Flo 369.4 hp/ 333.2 tq
    15.Flowmaster 369.4 hp / 331.8 tq
    16.Flowtech Warlock 366.3 hp / 325.3 tq
    17.No muffs 365.2 hp / 330.1 tq

    Sound Off in Quietest to Loudest (Decibels):

    1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
    2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
    3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
    4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
    5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
    6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
    7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
    8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
    9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
    10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
    11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
    12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
    13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
    14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
    15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
    16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).


    http://forums.stangnet.com/archive/index.php/t-392314

    And 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 2,500-6,000rpm Average
    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








    i have another test here on my computer but i don't know how to upload it onto this site because it is in a adobe pdf file.


    more numbers for ya'll who like numbers.

    All tests via an independent lab
    All tests @ 15 wc

    2 Straight Pipe 283 CFM
    2 Straight Pipe 365 CFM
    2 Straight Pipe 521 CFM

    2 Typical Bent tailpipe 268 CFM
    2 Typical Bent Tailpipe 417 CFM

    2 Inlet/Outlet_ Glass Pack Tips- No Louvers- Smooth 274 CFM
    2 Inlet/Outlet- Glass Pack Tips-Louvered 133 CFM
    Same as above set for reverse flow 141 CFM
    2 Cherry Bomb 239 CFM
    2 Cherry Bomb 294 CFM

    2 Inlet/Outlet Dynomax Super Turbo 278 CFM
    2 Inlet/Outlet Ultraflow Bullet 512 CFM
    2 Inlet/Outlet Gibson Superflow 267 CFM
    2 Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM
    2 Inlet Outlet Flowmaster ( 3 Chamber) 229 CFM
    2 Inlet/Outlet Thrush CVX 260 CFM
    2 Inlet/Outlet Maremount Cherry Bomb 298 CFM
    2 Inlet/Outlet Hooker Aero Chamber 324 CFM
    2 Inlet/Outlet Hooker Max Flow 521 CFM
    2 Inlet/Outlet Borla Turbo 373 CFM
    2 1/2" Inlet/Outlet Magnaflow 284 CFM


    Standard OEM 2 Inlet/Outlet 138-152 CFM
    Standard OEM 2 Inlet/Outlet 161-197 CFM

    and some real world testing to back up some numbers
    http://www.pontiacstreetperformance....p/exhaust.html

    "Recommendations:

    1. Always use a crossover of one kind or another. Our tests indicate that the X type gives additional improvements over the H type.

    2. Mount the mufflers as far to the rear of the chassis as possible. An important characteristic of the exhaust system (behind the headers) is its ability to dissipate heat energy. Heat loss brings with it, gas volume reduction, enabling smaller mufflers and pipes to be used without penalty.

    3. Always us the largest case muffler that you can fit under the chassis possible. The larger internal volume allows additional acoustical energy to be absorbed ,dissipated and eliminated.

    4. Unless an engine is in the 500+ horsepower level or run at very high RPM, the maximum tailpipe size required for minimal power loss is probably 2.5" diameter. When the exhaust pipes and mufflers drop the temperature significantly, the volume of the exhaust gas is reduced and tailpipe sizes is not as critical.

    5. When you must adapt various pipe sizes, always use long tapered cone reducers, such as, those available from Flowmaster. You can also use a crossover that has reduced pipe sizes built into it."

  • #2

    Re: some muffler test info

    Re: some muffler test info

    I've seem some of the info before but I can't remember where. I've been discussing mufflers with a friend. I just sent him a link to this.

    Thanks a lot.
    Cognizant Dissident

    Comment


    • #3

      Re: some muffler test info

      Re: some muffler test info

      Thanks for the info.

      Comment


      • #4

        Re: some muffler test info

        Re: some muffler test info

        LOL three things i don't skip on the cheap ,mufflers , shocks and tires.

        Comment


        • #5

          Re: some muffler test info

          Re: some muffler test info

          LOL three things i don't skip on the cheap ,mufflers , shocks and tires.
          I've got the Dynomax Super Turbos on my Chevelle. They're relatively cheap, perform pretty well, and I like the way they sound, too.

          I'd add oil filters to that list as well. Wix or AC Delco; never the generic house brands. I've even heard of the cheap air filters causing some (diesel) engines to run poorly.

          Comment


          • #6

            Re: some muffler test info

            Re: some muffler test info

            hell yea that is all i buy is wix or napa brand , napas are made by wix, i wouldn't wish a fram POS on my worst enemy.

            Comment


            • #7

              Re: some muffler test info

              Re: some muffler test info

              email me the pdf, I might can change it to a graphic for posting. Or to text - got the full Adobe here.
              ckelly AT raceabilene DOT com

              Comment


              • #8

                Re: some muffler test info

                Re: some muffler test info

                Years ago when I was building my 427 Biscayne the tech rep at Flowmaster told me to mount the mufflers close to the collectors. He said that they're design works better up close where the temp and velocity is higher. Made sense to me. I had the mufflers 18" back of the collectors and the car ran the same with or without them. With a normal "absorbtion" type muffler I would try to get them as far back as possible.

                Comment


                • #9

                  Re: some muffler test info

                  Re: some muffler test info

                  ok i didn,t realize the link was fubard its fixed now , and flows are fing junk , wouldn't put one on ANYthing i own.

                  Comment


                  • #10

                    Re: some muffler test info

                    Re: some muffler test info

                    Also remember that most of the above data, especially the topmost listing, is at least over 5 years old.
                    Today's mufflers may have had modifications that would put them higher or lower in these listings perhaps.
                    www.BigBlockMopar.com

                    Comment


                    • #11

                      Re: some muffler test info

                      Re: some muffler test info

                      Also, note that most of the mufflers are listed by BRAND not what MODEL they are. Take the flowmasters for instance. The majority of their street oriented mufflers are loud and don't deliver the horsepower that other quieter mufflers do...but the single chambered race mufflers are hard to beat.

                      Another aspect missed is interior noise. I've run Flowmaster 3" 2 chambers with and without tailpipes. Without tailpipes it was louder, but the interior resonance was insane for both. I ran a cheapo turbo to try to get rid of the resonance, and it killed it...but it also killed the 'cool' sound and slowed the car down a lot. Now with the side exit 3" inlet 2.5" outlet Spintechs, there is no resonance, the idle is quiet and WOT as really LOUD. Ran my quickest time with this setup too.

                      But the bottom line for most street cars is up to the individual. Does my car sound like I want it to, and can I live with it? Personally I like to make little kids cry.

                      P.S. those Hooker Maxflows look impressive. Might try some on my daily driver....
                      1970 Camaro RS - SOLD | 2000 Camaro SS - Traded in for a Hyundai...
                      1966 Ford Thunderbird - SOLD | 1963 MGB, abandoned V8 project, FOR SALE/SCRAP

                      1978 Cutlass - Post Lay-off daily driver

                      Comment


                      • #12

                        Re: some muffler test info

                        Re: some muffler test info

                        I've got a set of FlowMaster 50's under my '62 stationwagon and they sound real sweet. But that must be because of all the carbon that's inside of them.
                        I recently also put a set under my '65 300 convertible, but wow what a difference when these mufflers are still new! Under this car they sound really metallic and loud. I had a set of Dynomax mufflers under the convert first, but I found their idle-noise was just a little too loud for the car.
                        I'm thinking of richening the carb so the new Flowmasters carbon-up real fast and their sound will change for the better

                        The SpinTech's look promising from your description.
                        www.BigBlockMopar.com

                        Comment


                        • #13

                          Re: some muffler test info

                          Re: some muffler test info

                          If i can only save one person from not useing flowmasters , my life will be worth something.. :-\

                          Comment


                          • #14

                            Re: some muffler test info

                            Re: some muffler test info

                            I've mounted the Dynomax mufflers under my '60 NewYorker today if that makes ya feel better? ;)


                            www.BigBlockMopar.com

                            Comment


                            • #15

                              Re: some muffler test info

                              Re: some muffler test info

                              If i can only save one person from not useing flowmasters , my life will be worth something.. :-\
                              But, they're the master of flow! What? It's all just advertising? Oh.
                              1970 Camaro RS - SOLD | 2000 Camaro SS - Traded in for a Hyundai...
                              1966 Ford Thunderbird - SOLD | 1963 MGB, abandoned V8 project, FOR SALE/SCRAP

                              1978 Cutlass - Post Lay-off daily driver

                              Comment

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