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Thread: what kind of muffler?

  1. #11
    Join Date
    Jun 2007
    Location
    saratoga springs ,new york {upstate ,adirondacks }
    Posts
    1,878
    Whats the deal with magna flow?I think theyre awfull ,raspy as heck when you get into em,like an old school glasspacks and waay overpriced..ive had alot of different mufflers and magnaflows were the worst.maybe its my setup with f/i and headers size pipes etc,too each theyre own but i dont like a raspy exhaust.Im sure the setup makes a difference and on stock probly wont sound the way mine did.FWIW i like the dynomax ,welded case straight thrus.deep sound stay the same throughout rpm range.Magnas from what i heard was quiet at idle,and raspy throughout rpm range.Maybe dual 2.5s with headers and f/i isnt breating enough through them.If you decide to get magnas ,Ive got 2 like new 2.5 in 2.5 out,ill give ya a deal on,still shiny new.Good luck.
    mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .

  2. #12
    Join Date
    Nov 2007
    Location
    Bakersville, NC
    Posts
    608
    Quote Originally Posted by chvy=power View Post
    yea sounds ok when its idling or at WOT but when i'm just easin along it makes that annoying popping sound...
    Ive had flowmasters on evrything and never had what your describing, when easing along?
    David,
    2003 GMC Sierra Denali, LQ4, AWD, AWS, 4.10, Wheatley 93 tune, LT headers, GMPP CAI, BBK 80mm TB, MSD wires, E3 plugs, 160* T-stat, Flowmonster DI/DO, cutouts. Working on 4.8 heads, just purchased Comp 228R cam, 918 Springs, TI retainers, 7.4 hardend pushrods,

  3. #13
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,005
    Who eases along?

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  4. #14
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    794
    around 2500 rpm when im accelerating it makes a popping sound kinda like my buddies stock truck with knock off glass packs and no cats lol. i hate it but it stops around 3000 rpm
    2008 GMC Sierra SLE....370ci LY6 with some goodies SOLD
    1995 C2500- LS1 swap with a mp112
    build thread- http://www.ls1truck.com/forums/lsx-t...-ls1-swap.html

  5. #15
    Join Date
    Nov 2007
    Location
    Bakersville, NC
    Posts
    608
    still have never had that with flows when accelerating, now when downshifting manually its a different story. You could try adding a H pipe.
    David,
    2003 GMC Sierra Denali, LQ4, AWD, AWS, 4.10, Wheatley 93 tune, LT headers, GMPP CAI, BBK 80mm TB, MSD wires, E3 plugs, 160* T-stat, Flowmonster DI/DO, cutouts. Working on 4.8 heads, just purchased Comp 228R cam, 918 Springs, TI retainers, 7.4 hardend pushrods,

  6. #16
    Join Date
    Dec 2008
    Location
    South Carolina
    Posts
    794
    i can't run that cause it would hit the transfer case right?
    2008 GMC Sierra SLE....370ci LY6 with some goodies SOLD
    1995 C2500- LS1 swap with a mp112
    build thread- http://www.ls1truck.com/forums/lsx-t...-ls1-swap.html

  7. #17
    Join Date
    Nov 2007
    Location
    Bakersville, NC
    Posts
    608
    Quote Originally Posted by chvy=power View Post
    i can't run that cause it would hit the transfer case right?
    No you just move it on back in the exhaust system. Theres a few around here running them with 4wd trucks.
    David,
    2003 GMC Sierra Denali, LQ4, AWD, AWS, 4.10, Wheatley 93 tune, LT headers, GMPP CAI, BBK 80mm TB, MSD wires, E3 plugs, 160* T-stat, Flowmonster DI/DO, cutouts. Working on 4.8 heads, just purchased Comp 228R cam, 918 Springs, TI retainers, 7.4 hardend pushrods,

  8. #18
    Join Date
    Jan 2009
    Location
    Lawrence, Ks
    Posts
    84
    I have a 40 series flowmaster, 2 in/2out, and the only time I get any popping is on decel for about a 1k rpm range (like decel from 2500 to 1500 then it stops). But Just cruising or any accel it is great!!!

  9. #19
    Join Date
    Nov 2007
    Location
    S.A. Texas
    Posts
    3,751
    go Magnaflow or Borla if you are rich like Moze
    Name: Mark,
    God created turbo lag so nitrous trucks could have a chance.


    http://www.ls1truck.com/forums/my-ga...tml#post274877

  10. #20
    Join Date
    Mar 2006
    Location
    Mesquite
    Posts
    8,176
    Borla ProXS is Borlas 'economy' priced muffler. It's stainless and build exactly like their expensive line./

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