1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

exhaust flow experts...

Discussion in 'Performance and Tuning' started by racin, Nov 11, 2015.

  1. Nov 11, 2015 at 12:09 PM
    #1
    racin

    racin [OP] zmr

    Joined:
    Aug 14, 2015
    Member:
    #1659
    Messages:
    104
    Gender:
    Male
    Tampa, FL
    Vehicle:
    2015 Met.Gray 4x4
    have access to full on fabrication. I'm considering coming off stock headers 2.5" or 2.75" or even 3" let the tubes cross somewhere in the center and continue dual pipes till rear...only upgrade I have so far is afe dry drop in want to keep it that way..also thinking oF getting that tuner box in future can't remember the name at this point...I need help on size of pipes..does this sound like a ok setup? will drop 2 flow mufflers on there also ...what do you guys think...
     
    Last edited: Nov 11, 2015
  2. Nov 11, 2015 at 5:41 PM
    #2
    LOTSOFTOYS

    LOTSOFTOYS New Member

    Joined:
    Jun 9, 2015
    Member:
    #1396
    Messages:
    1,043
    Gender:
    Male
    First Name:
    Jace
    Mile high
    Vehicle:
    2005 Tundra DBL cab
    I just installed a 3 inch cat back on mine. And ur engine is bigger. Go for it! Gonna be loud tho...
     
    racin likes this.
  3. Nov 11, 2015 at 8:34 PM
    #3
    MotoTundra

    MotoTundra Adrenaline Addict

    Joined:
    Jan 6, 2014
    Member:
    #8
    Messages:
    2,410
    Gender:
    Male
    Vehicle:
    14' Black TRD CM
    TRS Mini D2S Retrofit on TRD Pro Headlights (Apollo 2.0 Shrouds, 35w XB Ballasts, 5500k Bulbs) TRD Pro Grill BakFlip VP Tonneau w/BakBox Dipped wheels & bumpers Undercover Swingcase SunTek Paint Protection film Yellow Lamin-X Fog Overlays Tint Bedmat
    racin likes this.
  4. Nov 11, 2015 at 10:18 PM
    #4
    racin

    racin [OP] zmr

    Joined:
    Aug 14, 2015
    Member:
    #1659
    Messages:
    104
    Gender:
    Male
    Tampa, FL
    Vehicle:
    2015 Met.Gray 4x4
    thanks will check it
     
  5. Nov 12, 2015 at 7:46 AM
    #5
    MotoTundra

    MotoTundra Adrenaline Addict

    Joined:
    Jan 6, 2014
    Member:
    #8
    Messages:
    2,410
    Gender:
    Male
    Vehicle:
    14' Black TRD CM
    TRS Mini D2S Retrofit on TRD Pro Headlights (Apollo 2.0 Shrouds, 35w XB Ballasts, 5500k Bulbs) TRD Pro Grill BakFlip VP Tonneau w/BakBox Dipped wheels & bumpers Undercover Swingcase SunTek Paint Protection film Yellow Lamin-X Fog Overlays Tint Bedmat
    Make sure you have some time on your hands, its a long read!
     
    racin likes this.
  6. Nov 12, 2015 at 7:14 PM
    #6
    flynbyu2

    flynbyu2 I'm your huckleberry...

    Joined:
    Sep 26, 2015
    Member:
    #1865
    Messages:
    230
    Gender:
    Male
    NorCal
    Vehicle:
    2015 SR5 CrewMax 2WD
    Flowmaster Super 50 / Dual In - Dual Out Exhaust
    I know NOTHING about Tundra exhaust systems but, I have some experience with exhaust systems on my street/strip car.

    When you start taking away back pressure by going to a larger diameter pipe (or uncapping your headers), you lose some low end power.
    The upside is you gain top end horsepower.

    Some back pressure isn't a bad thing unless you're drag racing the Tundra.
     
    racin likes this.
  7. Dec 14, 2015 at 6:17 AM
    #7
    PolarbearTRD

    PolarbearTRD New Member

    Joined:
    Nov 23, 2015
    Member:
    #2148
    Messages:
    94
    Gender:
    Male
    First Name:
    Mike
    Newton Nh
    Vehicle:
    2015 white crewmax TRD
    Carbon fiber wrap trim interior. Carbon fiber pillars, yitamotor 6000k led headlights. Rigid industries 50" led light bar,
    I recently went to.a local.custom exhaust shop near me lous custom exhaust, the guy there was shockingly honest and told me not to do an exhaust system on the truck. He says these new motor.need a certain amount of.back pressure and if it.doesn't have it you could ruin motor???? Is this true or was the guy being a lazy ass.
     
    racin likes this.
  8. Dec 14, 2015 at 6:42 AM
    #8
    Nit2wn

    Nit2wn New Member

    Joined:
    Sep 3, 2015
    Member:
    #1759
    Messages:
    42
    Gender:
    Male
    First Name:
    James
    Alabama
    Vehicle:
    2013 Crewmax TRD 4wd
    I won't say he was being lazy, but it can ruin how it drives [not the motor]. Had an 02 entended cab Ford with the 4.6. Ran true dual exhaust from right behind the converters. After the change, the truck would drop out of overdrive at the least little hill. I ended up putting a chip in the computer to solve the shifting issues and all was fine. I got lots of compliments on the truck though, true duals with 30'' glasspack mufflers. All of the older folks couldn't believe anew model truck could sound that good. Keep in mind this was in 2002 so tuners were exotic.
     
    racin likes this.
  9. Dec 14, 2015 at 9:00 AM
    #9
    racin

    racin [OP] zmr

    Joined:
    Aug 14, 2015
    Member:
    #1659
    Messages:
    104
    Gender:
    Male
    Tampa, FL
    Vehicle:
    2015 Met.Gray 4x4
    truck runs great and sounds ok exhaust wise i guess...just was seeking little more power.. I just really do not like that exhaust 'look' figured I'll just get a rear section made real nice with NO side exit :)
     
  10. Dec 14, 2015 at 12:01 PM
    #10
    csuviper

    csuviper Moderator Staff Member

    Joined:
    Jan 6, 2014
    Member:
    #38
    Messages:
    8,780
    Gender:
    Male
    First Name:
    Brian
    Broomfield, CO
    Vehicle:
    2012 Rock Warrior 5.7L 4X4
    Some Mods :) See build thread for details
    I figured @TruckyTruck would chime in here.

    I have the single output BA Muffler 6" muffler replacement. I like it alot now.
    With duals you dont want to decrease the backpressure too much.
     
    TruckyTruck likes this.
  11. Dec 14, 2015 at 7:38 PM
    #11
    TruckyTruck

    TruckyTruck New Member

    Joined:
    Jan 6, 2014
    Member:
    #20
    Messages:
    2,116
    Gender:
    Male
    First Name:
    Gary
    Texas
    If you plan on staying with stock manifolds, stick with a single out exhaust. Dual exhaust without headers will only net you a tiny increase in hp and nothing in low end tq. If you run new pipes and get rid of the 2 inch hidden pipe that's behind the drivers side cat, you will lose so much low end tq. The only way to make low end tq and hp with stock manifolds is leave the mid pipes alone and go with a straight thru muffler design to a single out exhaust like csuviper mentioned above. Even the stock single out tail pipe that comes with the truck was needed for the correct back pressure to get the stock motor to 380 hp and 400 pounds tq. If you dump the exhaust you may lose tq.

    I've got duals and the truck may be a hair quicker at wot, but did zero for low end tq. The only reason I bought a dual cat back is because I plan on running long tube headers.
     
    MotoTundra likes this.
  12. Dec 14, 2015 at 8:11 PM
    #12
    csuviper

    csuviper Moderator Staff Member

    Joined:
    Jan 6, 2014
    Member:
    #38
    Messages:
    8,780
    Gender:
    Male
    First Name:
    Brian
    Broomfield, CO
    Vehicle:
    2012 Rock Warrior 5.7L 4X4
    Some Mods :) See build thread for details
    I know you have said this several times but you know what you are talking about here and i don't want to improvise. Thanks.
     
    TruckyTruck likes this.
  13. Dec 14, 2015 at 8:31 PM
    #13
    TruckyTruck

    TruckyTruck New Member

    Joined:
    Jan 6, 2014
    Member:
    #20
    Messages:
    2,116
    Gender:
    Male
    First Name:
    Gary
    Texas
    sure thing! I spent the first year I had my truck researching exhaust options. Gone are the days you can just slap some duals and a cai on your vehicle and expect more power.
     
    MotoTundra likes this.
To Top