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Thread: HP difference with cutout

  1. #1

    HP difference with cutout

    Had my first dyno run this weekend.
    First one is threw stock muffler.
    2nd run is cutout.



    Just wonderin what yall thought. Hows the A/F?



    01 RCSB, 5.3, TR224/112
    4.10 w/ Auburn
    3200 Fuddle, HD2, Vette Servo
    Nelson Tune, LT Headers

  2. #2
    Join Date
    May 2008
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    Picking up 40 hp with a cutout means you have too restrictive a muffler. I had the same prob running through a Flowmaster...switched to a Magnaflow and life is better...

    07 Z71 4x4, 6.0L, 3.73s, Turbonetics T76 @ 10 psi, 75 shot, Snow meth kit, PLX DM-100 wideband gauge, Nelson tune, Comp 212/216 .557/.561 114 lsa, 60# injectors, Yank 3000, 4L80E , Magnaflow - dumped, e-cutout
    Line-X, Pace Edwards Full Metal Jackrabbit bedcover

  3. #3
    Join Date
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    Whenever I dynoed mine, I gained something like 13-14 hp.

    2000 ECSB 6.0L
    TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's

  4. #4
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    so you made what like 213-214ish?
    2006 Silverado
    Little Black Bitch

  5. #5
    Join Date
    Apr 2009
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    Roma, Texas
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    i was using lt headers, 3"y pipe, and the stock 3" diesel muffler. worked ok, but went with a 4" magnaflo and felt my l92 cnc ported heads(flowing about 380) breathing way better.
    [CENTER]
    GLADIATOR 6.0 2007 nnbs chevy 13.2 1/4mi. busting my drive shaft at 106 mph before the finish line
    CHEATER 6.0 2000 gmc xcab lq9 fully bolt on 12.52 motor and 11.62 n2o.
    http://youtu.be/UV-I1mlKcTI

  6. #6
    Join Date
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    dang didnt know a cutout made a difference

  7. #7
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    Quote Originally Posted by sleeper1500 View Post
    so you made what like 213-214ish?
    THEY CALL ME G.

    AZRAEL
    01 GMC REG CAB BUILDING
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    2013 POLARIS RANGER CREW LE EPS

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