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Doug Thorley Headers!

Discussion in 'Performance and Tuning' started by powell0892, Jul 24, 2009.

  1. Jul 24, 2009 at 11:12 AM
    #1
    powell0892

    powell0892 [OP] Active Member

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    Hey guys interested in getting some DLTL's to go with my magnaflow exhaust and was curious where the best price is? Also is it to hard to bolt on yourself? I would have the help of a all around mecanic. And one more thing can someone explain the O2 simulator please im clueless and how to install it. Thanks for any help guys....and gals
     
  2. Jul 24, 2009 at 4:13 PM
    #2
    roxspin72

    roxspin72 Enjoying my addiction

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    Oh Yeah!!!
    Lots of info on this flowing around right now, just browse through the Performance Threads.

    DTLT's are the way to go...
     
  3. Aug 2, 2009 at 2:19 PM
    #3
    Gadget@URD

    Gadget@URD Well-Known Member Vendor

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    URD has a nice package deal on the DT Long Tube Headers for the 1GR.

    Free shipping (CONUS) and a free URD sim.

    When you install the long tube headers you remove the front cats. When you do this the ECU will diagnose a failure in the cats and turn on the check engine light and on some trucks, like the FJ you will have a noticeable power loss and MPG loos while the check engine light is on. Does not seem to do this on the Tacoma for some reason.

    The URD Rear O2 sim intercepts the signal from the rear O2 sensors and modifies those signals so the ECU will think the cats are thier doing their job. The design we use also lets the ECU use the rear sensors for what it needs to for proper engine management functions. The newer trucks use the rear sensors for things other than just checking the cat and you do not want to interfere with that.

    To install it, you wire it into the ECU haress behind the glove box. Tap the power and ground wires, then find the signal wires from the rear sensors and intercept them so the run through the unit and that is all there is to it. It is about a 15 minute install.

    G
     
  4. Aug 8, 2009 at 9:37 AM
    #4
    bermise

    bermise Well-Known Member

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    Do you gain low end torque and power with the DTLT's vs stock? I have read that with less back pressure you lose power and torque in low rpms.
     
  5. Aug 8, 2009 at 9:41 AM
    #5
    DanGer

    DanGer Avatar approved by 98tacomav6

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    Back pressure does not have much to do with it. I have had chris4x4 explain to me (and many other people) something called scavaging. Scavaging is what affects power
     
  6. Aug 8, 2009 at 9:50 AM
    #6
    beastlytaco

    beastlytaco This is TW. One never knows what is a joke anymore

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    yes. and it also depends on your power plant. do you run a v6 or a 4 cyl.
     
  7. Aug 8, 2009 at 10:26 AM
    #7
    bermise

    bermise Well-Known Member

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    V6
     
  8. Aug 8, 2009 at 10:29 AM
    #8
    bermise

    bermise Well-Known Member

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    I need to do a search on scavaging. I know that when upgrading to a wider diameter on the exhaust pipe, you lose back pressure and you lose low end toruqe. But if you have forced induction, the wider pipes will benefit you.
     
  9. Aug 8, 2009 at 3:00 PM
    #9
    beastlytaco

    beastlytaco This is TW. One never knows what is a joke anymore

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    scavenging form what i understand is how efficiently our trucks take the power and convert it into energy. so imagine squeezing all the juice out of a lemon. thats the same principal to an extent
     
  10. Aug 26, 2009 at 8:42 PM
    #10
    nolanspawn

    nolanspawn Work In Progress

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    Gadget@URD, I am guessing this sale is over with. I am about to get back from Iraq so I am stockpiling parts to have waiting for me when I get back and that deal sounds sweet.
     
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