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Thread: race mufflers??

  1. #1
    Senior Member DYNO OPERATOR
    Join Date
    Apr 2008
    Posts
    496

    race mufflers??

    which is the best?
    flowmaster outlaw series or dynomax race mufflers? or some other brand.

  2. #2
    Senior Member MASTER BUILDER
    Join Date
    Dec 2005
    Location
    Napier, New Zealand
    Posts
    230
    Best is open headers. I had to put flow masters on my 572 Camaro for a night meeting and it ran like shit.
    It Ain't Over Til Its NOVA - 634ci of S*#t Your Pants!

  3. #3
    When I have to run mufflers I have a set of Spin Tech

  4. #4
    Junior Member SHOW GUEST
    Join Date
    Jun 2004
    Location
    Waterford Michigan
    Posts
    4

    Race mufflers

    I run Dyno-max race magnums, only picked up 2 hundreths ,between mufflers on and open headers.Must flow pretty darn good! Mind you that was on a 10.1-1 compression BBC. I think the more compression, the better the motor will like open headders. I.M.O. under 12.5-1 compression, motors like some back pressure. These ar pretty quiet mufflers till wide open throtle, unlike them noisy Flowmasters
    Real racers don't turn left!
    Live life 1320 feet @ a time!

  5. #5
    Senior Member EXPERT BUILDER
    Join Date
    Jan 2005
    Posts
    336
    my homemade bullet mufflers with 1/2" perferated holes in a 3"pipe will be tested on and off car.taking car to chassis dyno on july 19.will keep info posted.....oh the engine is a 10.2:1 compression 572.286 296@ .050 .748" lift-i will take engine north of 7000 rpms :shock:

  6. #6
    Senior Member RACING JUNKIE
    Join Date
    Mar 2003
    Location
    Ohio
    Posts
    935
    Kooks make a killer muffler set up.

  7. #7
    Senior Member MASTER BUILDER
    Join Date
    Dec 2004
    Location
    out of my mind in Kalamazoo, MI
    Posts
    179
    I'm running the old style flowmasters....the originals...they have held up well...flowmasters work well...for racing

  8. #8
    Junior Member APPRENTICE
    Join Date
    Aug 2004
    Posts
    14
    Flowmaster should be taken to court for false advertising. Worst perf. muffler on the market. I use magnaflow race mufflers on my chevelle. 4" straight through stainless mufflers w/ x pipe. 540 w/ 15:1 comp. and haven't been bothered by the cops yet on the street. At the track it runs the same with or without exhaust. Pay a little more now and be happy for years to come!

  9. #9
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    Location
    Belleville, IL
    Posts
    658
    http://www.youtube.com/watch?v=QIz2bSo8ScY

    Yeah, Flowmasters are junk. :roll: I'm only making about 1600 crank HP through 4.5" Top 10s (probably more than that given the issues on that pass).
    -WJ Birmingham

    OneBadGMC.com

  10. #10
    Senior Member RACING JUNKIE
    Join Date
    Dec 2004
    Location
    austin texas
    Posts
    729
    Are you racing the truck again Gmc?


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