1. Welcome to Tacoma World!

    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 Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Question about adding a tailpipe...

Discussion in 'Performance and Tuning' started by MEMO CAMPOS, Jul 8, 2013.

  1. Jul 8, 2013 at 1:51 PM
    #1
    MEMO CAMPOS

    MEMO CAMPOS [OP] Well-Known Member

    Joined:
    Sep 30, 2012
    Member:
    #88028
    Messages:
    297
    Gender:
    Male
    Westminster, Ca.
    Vehicle:
    05 PRERUNNER
    TC Upper Arms, ICON coilovers, Camburg spindles, AP standard leaf packs, ICON Resi.'s, AFE intake, Magnaflow Magnapack, Defiant Light Bar with PIAA 580's, 6K HID's top and bottom
    I currently run a 14" magna-pack with a turn down before the diff. I was wondering if I attach a tail pipe would it help quiet it down a bit? And if it will should I go 2.5" or 3" in diameter? I've been told it might help with bringing back a little bottom end torque! Thanks in advance guys for your responses!
     
  2. Jul 8, 2013 at 7:59 PM
    #2
    MEMO CAMPOS

    MEMO CAMPOS [OP] Well-Known Member

    Joined:
    Sep 30, 2012
    Member:
    #88028
    Messages:
    297
    Gender:
    Male
    Westminster, Ca.
    Vehicle:
    05 PRERUNNER
    TC Upper Arms, ICON coilovers, Camburg spindles, AP standard leaf packs, ICON Resi.'s, AFE intake, Magnaflow Magnapack, Defiant Light Bar with PIAA 580's, 6K HID's top and bottom
    Anybody?
     
  3. Jul 8, 2013 at 8:06 PM
    #3
    TrdSurgie

    TrdSurgie revised

    Joined:
    Feb 19, 2012
    Member:
    #73132
    Messages:
    3,326
    Gender:
    Male
    SoCal
    Rear leaf spring tsb 5000 miles, w ac fan 26k miles, windshield creaking 28k miles- not warranty. Bad upper idler pulleys 32k miles- not warranty, Toyota Quality!
    Yes you'll have less drone if it exits out the bed side. Keep the tubing stock size.
     
  4. Jul 8, 2013 at 8:09 PM
    #4
    RacecarGuy

    RacecarGuy Well-Known Member

    Joined:
    Jul 12, 2012
    Member:
    #82501
    Messages:
    298
    Gender:
    Male
    Houston, Texas
    Vehicle:
    '12 DCSB OR
    Diff breather relocated, Grillcraft insert, BAMF LCA Skids, BAMF Diff skid, Pelfreybilt IFS and Trans skid, RCI gas tank skid, Inverter anytime mod, Bronze SCS F-5's, Icon RR's, Dakar leafs, Superbumps, AllPro Apex bumper
    You maybe getting some resonance from under the truck with the turn down. By adding the tail pipe and projecting the sound out from the truck, it maybe perceived quieter to individuals inside the cab. As for 2.5 vs 3? Probably doesn't matter. There should be no restriction after the muffler so a tailpipe would have no effect on torque, unless you make one the shape of a pretzel and have 14 turns bent I to it.
     
  5. Jul 8, 2013 at 10:06 PM
    #5
    MEMO CAMPOS

    MEMO CAMPOS [OP] Well-Known Member

    Joined:
    Sep 30, 2012
    Member:
    #88028
    Messages:
    297
    Gender:
    Male
    Westminster, Ca.
    Vehicle:
    05 PRERUNNER
    TC Upper Arms, ICON coilovers, Camburg spindles, AP standard leaf packs, ICON Resi.'s, AFE intake, Magnaflow Magnapack, Defiant Light Bar with PIAA 580's, 6K HID's top and bottom
    Thanks for your reply! This does make alot of sense. However I've been told by a couple of exhaust shops that by adding a tailpipe it might help with low end grunt due to the fact the 4.0 needs a little bit of back pressure to maintain torque...
     
  6. Jul 9, 2013 at 5:29 AM
    #6
    Lurkin

    Lurkin Well-Known Member

    Joined:
    May 21, 2009
    Member:
    #17497
    Messages:
    5,308
    First Name:
    Rod
    Pearland, TX
    Vehicle:
    09 PreRunner SR5 DC
    Put your OEM back on, cut in a new muffler, sell the Magnapack.
     
  7. Jul 9, 2013 at 8:51 AM
    #7
    tooter

    tooter play every day

    Joined:
    Apr 13, 2013
    Member:
    #102021
    Messages:
    2,391
    Gender:
    Male
    First Name:
    Greg
    Los Angeles
    Vehicle:
    2012, std cab, 5 lug, 2.7, 5 speed
    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    I took out my stock muffler to install a Magnaflow and lost low end torque, so I went back to the stock muffler. If you want to preserve low end torque, don't open up your exhaust.
     
  8. Jul 9, 2013 at 10:38 AM
    #8
    MEMO CAMPOS

    MEMO CAMPOS [OP] Well-Known Member

    Joined:
    Sep 30, 2012
    Member:
    #88028
    Messages:
    297
    Gender:
    Male
    Westminster, Ca.
    Vehicle:
    05 PRERUNNER
    TC Upper Arms, ICON coilovers, Camburg spindles, AP standard leaf packs, ICON Resi.'s, AFE intake, Magnaflow Magnapack, Defiant Light Bar with PIAA 580's, 6K HID's top and bottom
    Thanks for your reply sir, so you mean oem tailpipe? If so what muffler in your opinion works best?
     
  9. Jul 9, 2013 at 10:48 AM
    #9
    MEMO CAMPOS

    MEMO CAMPOS [OP] Well-Known Member

    Joined:
    Sep 30, 2012
    Member:
    #88028
    Messages:
    297
    Gender:
    Male
    Westminster, Ca.
    Vehicle:
    05 PRERUNNER
    TC Upper Arms, ICON coilovers, Camburg spindles, AP standard leaf packs, ICON Resi.'s, AFE intake, Magnaflow Magnapack, Defiant Light Bar with PIAA 580's, 6K HID's top and bottom
    Wow I was not expecting this news! Truly shocking that the oem set up performed better for you. However after a little searching I've seen similar cases likes yours. I don't know that going full stock will satisfy my fancy but I think if I surround my current set up with oem plumbing I might just get a slight bump in improvement.
    Thank you so much for sharing your story it really helps with my mission to improve my exhaust!
     
  10. Jul 9, 2013 at 11:39 AM
    #10
    Lurkin

    Lurkin Well-Known Member

    Joined:
    May 21, 2009
    Member:
    #17497
    Messages:
    5,308
    First Name:
    Rod
    Pearland, TX
    Vehicle:
    09 PreRunner SR5 DC
    No, I meant the OEM catback, then just add a drop-in muffler to that. Sell the entire Magnapack.

    As for what to replace with,,, Magnaflow, Aeroturbine, Dynomax seem to have good names and feedback.

    BTW, I don't recall seeing many reports of low-end loss with just a drop-in muffler replacement, assuming you keep to a 2.25 or 2.5 muffler. Not questioning tooter, but from what I've read, he may be an outlier.
     
  11. Jul 9, 2013 at 12:03 PM
    #11
    MEMO CAMPOS

    MEMO CAMPOS [OP] Well-Known Member

    Joined:
    Sep 30, 2012
    Member:
    #88028
    Messages:
    297
    Gender:
    Male
    Westminster, Ca.
    Vehicle:
    05 PRERUNNER
    TC Upper Arms, ICON coilovers, Camburg spindles, AP standard leaf packs, ICON Resi.'s, AFE intake, Magnaflow Magnapack, Defiant Light Bar with PIAA 580's, 6K HID's top and bottom
    Ok I totally agree with your opinion, my intermediate pipe is already 2.5 as well as the magnapack so I'm gonna try just adding a 2.5 tailpipe and go from there. If it doesn't change anything then I'll just go with a 22" long magnaflow.
     
  12. Jul 9, 2013 at 12:12 PM
    #12
    tooter

    tooter play every day

    Joined:
    Apr 13, 2013
    Member:
    #102021
    Messages:
    2,391
    Gender:
    Male
    First Name:
    Greg
    Los Angeles
    Vehicle:
    2012, std cab, 5 lug, 2.7, 5 speed
    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    I wasn't either until I tried it for myself. :)


    Consider for a moment... at low rpms, very little exhaust is flowing and the stock exhaust is underutilized. It becomes more restrictive as exhaust flow increases when the rpms go up. You can gain more top end wide open throttle power with a more open exhaust, but you'll give up low end torque to get it.

    Keep in mind that I have a 2.7... and Toyota uses the same diameter exhaust pipes on the 2.7 as it does on the 4.0, so opening up the exhaust on a 2.7 has a greater torque loss effect than on a 4.0.

    I did install a low end torque enhancing header, but retained the stock muffler to keep the same backpressure.

    [​IMG]
     
    Last edited: Jul 9, 2013
  13. Jul 9, 2013 at 12:18 PM
    #13
    Lurkin

    Lurkin Well-Known Member

    Joined:
    May 21, 2009
    Member:
    #17497
    Messages:
    5,308
    First Name:
    Rod
    Pearland, TX
    Vehicle:
    09 PreRunner SR5 DC
    Now I see, you're not an outlier, you are a 4-cyl :eek: I missed that in your sig, explains much.

    OP, keep in mind as you are researching that the 4 and 6 cyl react differently to mods. I have heard few to no reports of low-end loss for the 4.0 with a muffler drop-in. Staying with a 2.25 or 2.5" system should not effect the 4.0 scavenging to any extent. Not sure why your Magnapack is acting like that.
     
  14. Jul 9, 2013 at 12:30 PM
    #14
    MEMO CAMPOS

    MEMO CAMPOS [OP] Well-Known Member

    Joined:
    Sep 30, 2012
    Member:
    #88028
    Messages:
    297
    Gender:
    Male
    Westminster, Ca.
    Vehicle:
    05 PRERUNNER
    TC Upper Arms, ICON coilovers, Camburg spindles, AP standard leaf packs, ICON Resi.'s, AFE intake, Magnaflow Magnapack, Defiant Light Bar with PIAA 580's, 6K HID's top and bottom
    This is very good info, I didn't know that both engines utilized the same size plumbing. As I mentioned above I'm gonna baby step my way as this is not a cheap project.


    I wish adding shorty headers was easier on a 4.0! From what I've read short tube headers are more directed to low end power, long tube headers enhance top end more than low end...
     
  15. Jul 9, 2013 at 1:53 PM
    #15
    tooter

    tooter play every day

    Joined:
    Apr 13, 2013
    Member:
    #102021
    Messages:
    2,391
    Gender:
    Male
    First Name:
    Greg
    Los Angeles
    Vehicle:
    2012, std cab, 5 lug, 2.7, 5 speed
    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    The consensus of opinion is exactly the opposite. Long tube headers enhance low rpm torque and short tube headers enhance high rpm performance. It's just one reason I chose an LCEngineering header over Doug Thorley. LCE succeeded in folding the runners of a long tube header into the confined space of a short tube header...

    [​IMG]

    ...so that it fits perfectly with no other exhaust alterations. :thumbsup:
     
  16. Jul 9, 2013 at 5:22 PM
    #16
    MEMO CAMPOS

    MEMO CAMPOS [OP] Well-Known Member

    Joined:
    Sep 30, 2012
    Member:
    #88028
    Messages:
    297
    Gender:
    Male
    Westminster, Ca.
    Vehicle:
    05 PRERUNNER
    TC Upper Arms, ICON coilovers, Camburg spindles, AP standard leaf packs, ICON Resi.'s, AFE intake, Magnaflow Magnapack, Defiant Light Bar with PIAA 580's, 6K HID's top and bottom
    That header looks of the best quality I wish they catered to the 4.0! I'll have to just get with URD about long vs short headers cause I opened up a can of worms researching the whole header thing...
     
  17. Jul 9, 2013 at 5:41 PM
    #17
    tooter

    tooter play every day

    Joined:
    Apr 13, 2013
    Member:
    #102021
    Messages:
    2,391
    Gender:
    Male
    First Name:
    Greg
    Los Angeles
    Vehicle:
    2012, std cab, 5 lug, 2.7, 5 speed
    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    LCE produces a lot of Toyota 4 banger stuff but maybe one day they'll expand their product line to the 4.0. They produce top notch quality components. I've run their superbly designed headers on my Tacomas for over a decade.

    From what I've see of their site URD is an innovative company and I don't believe that you could go wrong buying their products. :thumbsup:
     
To Top