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Thread: How Restrictive are the stock Mufflers? This much.....

  1. 03-19-2015, 04:51 AM #41
    hflores3
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    I'm getting "nothing" on my US eBay. You finding them down under?
    2009 G8 GT
    628.5 RWHP on gasoline​ ---> ARH Long Tubes 1 7/8" & full exhaust / Magnaflow Mid Muffler / Cherry Bomb Vortex Mufflers / Magnuson 1.9 / Overdrive "non-cog" pulley system / Ported blower base / 2.70" Pulley / LS3 rockers with Trunion upgrade / Trick Flow x255 cylinder heads / 8-Rib Pulley system / Innovator West 10% Balancer / DOD Delete / Lunati Lifters / Custom CTS-V Patrick G Cam Grind / Wiseco Forged Rods & Pistons / Injector Dynamics 85lbs / 4.25" Air Intake Tube / 102mm TB & MAF Tube / 102mm TPIS Throttle Body / LS7 MAF Card / ZL1 Fuel Pump / JMS Fuel Pump Booster / VaporWorx Controller / B&M Tranny Cooler with fan / Circle-D Heavy Duty Rebuild & 265mm triple Disc Billet Converter / Camaro Tranny Pan/ Eibach Lowering Springs / BMR Front & Rear Sway Bars, LCA's, Control Arms / DBA 4000xs Rotors / Hawks Ceramic Pads
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  2. 03-19-2015, 04:52 AM #42
    hflores3
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    Would love to see your chart brother.
    2009 G8 GT
    628.5 RWHP on gasoline​ ---> ARH Long Tubes 1 7/8" & full exhaust / Magnaflow Mid Muffler / Cherry Bomb Vortex Mufflers / Magnuson 1.9 / Overdrive "non-cog" pulley system / Ported blower base / 2.70" Pulley / LS3 rockers with Trunion upgrade / Trick Flow x255 cylinder heads / 8-Rib Pulley system / Innovator West 10% Balancer / DOD Delete / Lunati Lifters / Custom CTS-V Patrick G Cam Grind / Wiseco Forged Rods & Pistons / Injector Dynamics 85lbs / 4.25" Air Intake Tube / 102mm TB & MAF Tube / 102mm TPIS Throttle Body / LS7 MAF Card / ZL1 Fuel Pump / JMS Fuel Pump Booster / VaporWorx Controller / B&M Tranny Cooler with fan / Circle-D Heavy Duty Rebuild & 265mm triple Disc Billet Converter / Camaro Tranny Pan/ Eibach Lowering Springs / BMR Front & Rear Sway Bars, LCA's, Control Arms / DBA 4000xs Rotors / Hawks Ceramic Pads
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  3. 03-19-2015, 06:27 AM #43
    1313
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    I'm convinced I can feel a butt dyno difference with my stock mufflers vs a straight through one like my magnadrones.
    09 G8 GT
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  4. 03-20-2015, 03:54 AM #44
    pir4te
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    Default How Restrictive are the stock Mufflers? This much.....

    Quote Originally Posted by hflores3 View Post
    Would love to see your chart brother.
    This is charted difference between mid delete running HSV bimodals open and closed:



    BLUE is bimodal flaps open, GREEN is Closed. Not much in it really everyday driving only really starts to show when you're wringing its neck.

    The x-pipe at the correct wave location makes a noticable difference to torque, also splits the double-pulse and sequences it to seem quieter.

    Get those bassey speaker drivers out again and watch some more experiments:



    Bottom line is that best result for me, my driving style, in this near stock car, 32" long tube 4-2-1, megaphone PWTB inc HFC, 2.5" straight back to proper x-pipe at second harmonic wavelength, with set of HSV bimodals.



    It's all 'bout the bass and the torque.
    Last edited by pir4te; 03-20-2015 at 04:04 AM.
    Compression is King. Race-built VVT brawler hauler with Stingray tune.

    Supernaturally as-pirated, all-alcohol, all-motor.
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  5. 03-23-2015, 01:53 AM #45
    pir4te
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    Quote Originally Posted by hflores3 View Post
    I'm getting "nothing" on my US eBay. You finding them down under?
    http://pages.ebay.com/link/?nav=item...d=121566573170

    Extra long tips for ute can be cut to fit.
    Compression is King. Race-built VVT brawler hauler with Stingray tune.

    Supernaturally as-pirated, all-alcohol, all-motor.
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  6. 03-24-2015, 01:47 PM #46
    hflores3
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    Just got back from having the Magnaflow mid muffler and Cherry Bomb Vortex mufflers put on. No post dyno data "yet" .....but MAN DO THESE SOUND ABSOLUTELY GREAT!!! Not too loud. Good deep rumble. Sounds exotic. Minimal decibels into the cabin. No drone! Pure "fury" at WOT!!

    Guerra this one on you for sharing!

    I'm pleased by a factor of 100x!!!! So much so ....that I really need a sandwich, a cigarette and a nice nap!

    It sounds THAT good.


    Sent from my iPhone using Tapatalk
    Last edited by hflores3; 03-24-2015 at 03:50 PM.
    2009 G8 GT
    628.5 RWHP on gasoline​ ---> ARH Long Tubes 1 7/8" & full exhaust / Magnaflow Mid Muffler / Cherry Bomb Vortex Mufflers / Magnuson 1.9 / Overdrive "non-cog" pulley system / Ported blower base / 2.70" Pulley / LS3 rockers with Trunion upgrade / Trick Flow x255 cylinder heads / 8-Rib Pulley system / Innovator West 10% Balancer / DOD Delete / Lunati Lifters / Custom CTS-V Patrick G Cam Grind / Wiseco Forged Rods & Pistons / Injector Dynamics 85lbs / 4.25" Air Intake Tube / 102mm TB & MAF Tube / 102mm TPIS Throttle Body / LS7 MAF Card / ZL1 Fuel Pump / JMS Fuel Pump Booster / VaporWorx Controller / B&M Tranny Cooler with fan / Circle-D Heavy Duty Rebuild & 265mm triple Disc Billet Converter / Camaro Tranny Pan/ Eibach Lowering Springs / BMR Front & Rear Sway Bars, LCA's, Control Arms / DBA 4000xs Rotors / Hawks Ceramic Pads
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  8. 03-24-2015, 02:51 PM #47
    reddeadg8
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    did you go with the Magnaflow 12468? and which Cherry Bombs the 2.5" or the 3" ?

    waiting to see video!!!!
    2002 Camaro Z28 - far from stock
    2009 G8 GT SRM #1 - Sold
    2009 G8 GT SRM #2 - Sold
    2015 Chevy SS PBM - the new new!
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  9. 03-24-2015, 03:45 PM #48
    hflores3
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    Quote Originally Posted by reddeadg8 View Post
    did you go with the Magnaflow 12468? and which Cherry Bombs the 2.5" or the 3" ?

    waiting to see video!!!!
    Magnaflow 12468 & the Cherry Bomb Vortex 2.5" .... Pure sex!
    2009 G8 GT
    628.5 RWHP on gasoline​ ---> ARH Long Tubes 1 7/8" & full exhaust / Magnaflow Mid Muffler / Cherry Bomb Vortex Mufflers / Magnuson 1.9 / Overdrive "non-cog" pulley system / Ported blower base / 2.70" Pulley / LS3 rockers with Trunion upgrade / Trick Flow x255 cylinder heads / 8-Rib Pulley system / Innovator West 10% Balancer / DOD Delete / Lunati Lifters / Custom CTS-V Patrick G Cam Grind / Wiseco Forged Rods & Pistons / Injector Dynamics 85lbs / 4.25" Air Intake Tube / 102mm TB & MAF Tube / 102mm TPIS Throttle Body / LS7 MAF Card / ZL1 Fuel Pump / JMS Fuel Pump Booster / VaporWorx Controller / B&M Tranny Cooler with fan / Circle-D Heavy Duty Rebuild & 265mm triple Disc Billet Converter / Camaro Tranny Pan/ Eibach Lowering Springs / BMR Front & Rear Sway Bars, LCA's, Control Arms / DBA 4000xs Rotors / Hawks Ceramic Pads
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  10. 03-24-2015, 06:03 PM #49
    hflores3
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    Now I need a video too? Man you guys are demanding! :-)


    Sent from my iPhone using Tapatalk
    2009 G8 GT
    628.5 RWHP on gasoline​ ---> ARH Long Tubes 1 7/8" & full exhaust / Magnaflow Mid Muffler / Cherry Bomb Vortex Mufflers / Magnuson 1.9 / Overdrive "non-cog" pulley system / Ported blower base / 2.70" Pulley / LS3 rockers with Trunion upgrade / Trick Flow x255 cylinder heads / 8-Rib Pulley system / Innovator West 10% Balancer / DOD Delete / Lunati Lifters / Custom CTS-V Patrick G Cam Grind / Wiseco Forged Rods & Pistons / Injector Dynamics 85lbs / 4.25" Air Intake Tube / 102mm TB & MAF Tube / 102mm TPIS Throttle Body / LS7 MAF Card / ZL1 Fuel Pump / JMS Fuel Pump Booster / VaporWorx Controller / B&M Tranny Cooler with fan / Circle-D Heavy Duty Rebuild & 265mm triple Disc Billet Converter / Camaro Tranny Pan/ Eibach Lowering Springs / BMR Front & Rear Sway Bars, LCA's, Control Arms / DBA 4000xs Rotors / Hawks Ceramic Pads
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  11. 03-24-2015, 06:36 PM #50
    walsfan
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    ^wow been thinking about switching from my current exhaust to this exact same setup...heard a video on YouTube and those vortex sound dam good
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