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Turbo BS Thread

Discussion in 'Performance and Tuning' started by Clay_916, Mar 20, 2017.

  1. Sep 15, 2017 at 6:59 AM
    #2561
    Clay_916

    Clay_916 [OP] Well-Known Member

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    Agree with @JayRolla 100% need an afr gage.

    Welp, failed CO emissions twice for NOX. First time I pretty much went in on the tune the truck has been running, down to 10 psi though and split my tank 50/50 with gas/e85 to try and tone down the scent. Was 4.1 out of 2.0 for NOX. Disconnected my charge pipes just after the IC and went back. NOX was down to 3.5, still failing by a large margin, but everything else went up. CO doubled, but only NOX failed yet again.

    I'm thinking my cat is garbage since it was a cheap, high flow variety so I ordered a vibrant and made sure it specified "3-way." I do not have the stock cat and my truck does not have EGR. Does anyone know if the OEM spec cat on this type of engine is some type of super-cat? Going to probably run an even higher e85 ratio as well and still keep the charge pipes off, I don't think any of the people I saw working in there would call me out over the smell. Anyone have any other suggestions?

    Just to reiterate, my NOX was nearly double the maximum allowable even on the basically stock, 0-boost tune running 50% e85. Pretty much everything on the engine is up to date. Seafoamed the cylinders about a year ago. Gotta be the cat right?
     
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  2. Sep 15, 2017 at 7:15 AM
    #2562
    MadTaco461

    MadTaco461 BRO runner

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    I got a nox problem too. Everything else is super low. Make sure your egr is working well. That is what will cool down your gas temps. I run a ca specific cat that aftermarket. Afraid I might need to get a Toyota one. First I'm going to try to get my egr to flow more.
     
  3. Sep 15, 2017 at 7:38 AM
    #2563
    Torspd

    Torspd Tor-nication

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    Vibrant, if I recall correctly sells a metal core 50 state legal cat. That, or one from Magnaflow is what you want. Install it with flanges on it, so that you can swap it out easily.
     
  4. Sep 15, 2017 at 7:42 AM
    #2564
    Clay_916

    Clay_916 [OP] Well-Known Member

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    I think the one I have now is flowmaster or magnaflow. I've read that often the cheap universal cats are only 2-way cats which don't have any agents for NOX emissions so I'm hoping that's what's going on in my case :fingerscrossed:
     
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  5. Sep 15, 2017 at 8:22 AM
    #2565
    Torspd

    Torspd Tor-nication

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    Clay_916 [OP] likes this.
  6. Sep 15, 2017 at 9:34 AM
    #2566
    Brice

    Brice Turbo Member

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    I pass emissions every time! :D


    *cough*cough* diy o2 simulator
     
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  7. Sep 15, 2017 at 9:49 AM
    #2567
    Jstand

    Jstand Well-Known Member

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  8. Sep 15, 2017 at 10:48 AM
    #2568
    JayRolla

    JayRolla Well-Known Member

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    Dont say AFR gauge. Might trick the kids into buying an autometer AFR gauge that does nothing but flash.

    WBO2 gauge is what you want.
     
  9. Sep 15, 2017 at 10:49 AM
    #2569
    JayRolla

    JayRolla Well-Known Member

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    Me too, but I use e85, speed density and o2 simulation also. HA!
     
  10. Sep 15, 2017 at 11:52 AM
    #2570
    Brice

    Brice Turbo Member

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  11. Sep 15, 2017 at 12:54 PM
    #2571
    MadTaco461

    MadTaco461 BRO runner

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    Does e85 also help with nox?
     
  12. Sep 15, 2017 at 1:40 PM
    #2572
    JayRolla

    JayRolla Well-Known Member

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    From google

    "The differences of average E85 versus gasoline emission rates for all vehicle models are -22% for CO, 12% for HC, and -8% for NOx emissions, which imply that replacing gasoline with E85 reduces CO emissions, may moderately decrease NOx tailpipeemissions, and may increase HC tailpipe emissions."
     
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  13. Sep 15, 2017 at 2:20 PM
    #2573
    MadTaco461

    MadTaco461 BRO runner

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    I'll take that.
     
  14. Sep 15, 2017 at 3:25 PM
    #2574
    JayRolla

    JayRolla Well-Known Member

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    My Turbo talon could never pass emissions. Actually paid it off a few times. Went e85 and passed everytime. Even being stuck in open loop. HA.
     
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  15. Sep 15, 2017 at 4:54 PM
    #2575
    MadTaco461

    MadTaco461 BRO runner

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    I can't run my piggyback so hopefully a gallon of e85 does it. I'm right on the border.
     
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  16. Sep 15, 2017 at 5:03 PM
    #2576
    yota243

    yota243 Well-Known Member

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    U cant run ur piggy back during the test? So like u have to swap injectors back to stock when u go in?
     
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  17. Sep 15, 2017 at 5:25 PM
    #2577
    MadTaco461

    MadTaco461 BRO runner

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    I have to go 100% stock for mine. All sensors checked in. Do a dyno run at 15 and 25mph with a sensor in the tail pipe. It's rough.
     
  18. Sep 15, 2017 at 5:30 PM
    #2578
    yota243

    yota243 Well-Known Member

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    Dang that sucks... Roll tide for no emissions check
     
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  19. Sep 16, 2017 at 8:10 AM
    #2579
    Torspd

    Torspd Tor-nication

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    Good ole Cali emissions. :annoyed: I have heard of people using acetone and Isopropyl. Might as well pour Everclear to top off the cocktail. Full ABV Everclear from another state. Lol.

    As long as mine has no CELs, and I have a cat in place, mine passes. Thus the quick change cat. :cool:
     
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  20. Sep 16, 2017 at 9:11 AM
    #2580
    Jstand

    Jstand Well-Known Member

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    it almost seems like the charge of boost struggles to charge up (more throttle) and discharges quicker compared to before all this started. Before i put in too much racing fuel and messed up the o2 sensor i didn't have this hesitation. All that was changed since then was the fuel pump and o2 sensor. Probably would be a whole lot easier to diagnose with the WB but i think ill check again for leaks
     
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