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Anyone who knows about exhaust performance-True dual

Discussion in 'Performance and Tuning' started by kajun123, Dec 15, 2008.

  1. kajun123

    kajun123 [OP] CHEROKEE

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    i am thinking about getting true dual exhaust! I have thought about doing many different types of exhaust setups but i think im actually going to do this one! I dont know all that much about exhaust performance wise but i have a general idea. I was planning on taking out the rear cats, from that point run true dual pipe all the way up to the muffler, then duals out the rear. What i need help with is h pipes as compared to dual in/dual out mufflers? Any other info anyone may have on true dual setups will be greatly appreciated as well even if it is something i did not mention!!
     
  2. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    FlimFlubberJAM
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    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    Most of the "True duall" set ups I have done have produced a power loss, unless the engine has been supercharged, and even then, only on large V8 engines.

    Read this:

    http://www.tacomaworld.com/forum/technical-chat/19967-how-air-goes-thru-your-engine-basic.html


    http://www.tacomaworld.com/forum/technical-chat/20434-interesting-exhaust-article-i-read.html
     
  3. kajun123

    kajun123 [OP] CHEROKEE

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    i was thinking running smaller pipe would fix that problem no?
     
  4. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    no. Your better off with a single pipe. If you want the dual system, split the pipes after the muffler.
     
  5. TacoTycoon

    TacoTycoon Well-Known Member

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    Bilstein 5100 Coilovers, Diff Drop Kit, TSB AAL, 285/70/17 BFG A/T Tires, 17X8 Helo HE835 Wheels, Rear Bilstein 5100s, Dual Flowmaster 50 series, TRD CAI, TRD Front Seat Covers, Rear Suspension TSB, 35% Tint, Redline Hood Struts, MagLite Mod
    X2
     
  6. kajun123

    kajun123 [OP] CHEROKEE

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    i dont mean to offend you by asking this but how did you determine that it was a powerloss?
     
  7. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    I never had to determine anything, I have built "true dual" exhasts and dynoed them. I have dynoed alot of systems, and on many vehicles, so I have a good idea of what works. :)
     
  8. kajun123

    kajun123 [OP] CHEROKEE

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    dyno test would determine that!! haha
     
  9. kajun123

    kajun123 [OP] CHEROKEE

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    when you ran the dyno test do you remember how much of a powerloss it was?
     
  10. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    Only about 5 h.p.. The largest loss was a Flowmaster with almost 10 h.p. loss.
     
  11. kajun123

    kajun123 [OP] CHEROKEE

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    That was with running true dual exhaust correct? and what was the brand muffler used, besides the flowmaster.
     
  12. chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    2013 Rubicon Unlimited,
    4.10 gears, sliders, lots of buttons, and yellow flashing lights on the dash.
    The dynos I have done included:
    Duals:
    Flowmaster, Jardine, Gibson, Custom.
    Singles:
    Borla, Flowmaster, Dynomax, Magna Flow, Gibson, Jardine, Spin Tech.
     
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