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Throttle body coolant bypass

Discussion in 'Performance and Tuning' started by Tundracollector, Oct 23, 2019.

  1. Oct 24, 2019 at 8:18 AM
    #31
    dirtydeeds

    dirtydeeds Exhaust Fabricator Vendor

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    the supercharger has a heat exchanger inside of it which works its butt off to bring temps down to ambient. Having 200* coolant in the throttle body doesn’t help the inner cooler;)
     
  2. Oct 24, 2019 at 9:33 AM
    #32
    LlamaResistance

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    One caveat, the other purpose of keeping the TB warm is to help reduce carbon deposits on the bore and blade of the TB. The breather system deposits air with en-trained oil into the intake pipe just before the TB. Not as large an issue since the electronic TB can adjust to keep you idle speed correct but on older TBs that were cable actuated with a idle air control valve would have issues with low idle/dying at stops because of carbon buildup. Keeping that oil warm helped it to continue flowing through the intake and into the engine to burn instead of building up on the TB surfaces.
     
    zedleje, tundra_20, Rica25 and 2 others like this.
  3. Oct 24, 2019 at 10:25 AM
    #33
    Tundracollector

    Tundracollector [OP] New Member

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    Conclusion to my bro science after running more errands.........lol



    B0EC885F-F628-4F24-A8DD-B69BC5BD2766.jpg 6CC97AFA-04C8-4A10-B9DF-6A1FB12E42DC.jpg
     
  4. Oct 24, 2019 at 10:45 AM
    #34
    robz

    robz New Member

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    was not aware that this possible on the Tundra.
    Thanks for posting guys. Will definitely do this
     
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  5. Oct 24, 2019 at 11:12 AM
    #35
    Trooper2

    Trooper2 Premium Lone Star Member / SSEM #13

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    Interesting topic.

    I am envisioning an inline "Thermo-Valve" or Thermostat that is open until a certain given temp; maybe 80-100 degrees. Then closes off, discontinuing coolant flow preventing the TB from getting any hotter.
    If this restricts coolant flow in the system, then maybe an integrated bypass as well.
     
    Rica25 likes this.
  6. Oct 24, 2019 at 3:59 PM
    #36
    GAknight

    GAknight New Member

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    Too many…scratch that…not done yet.
    Awesome! :thumbsup:
    Amazing the difference, right?!
     
  7. Oct 24, 2019 at 4:10 PM
    #37
    GAknight

    GAknight New Member

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    Too many…scratch that…not done yet.
    I'm n/a. Probably worth it more on the n/a than a SC, since the SC's have an inner-cooler.
     
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  8. Oct 24, 2019 at 4:53 PM
    #38
    Tundracollector

    Tundracollector [OP] New Member

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    yup, couldn’t do that before.

    I think it’s worth it regardless, thinking about doing it on my pro, but then again what if I want to take a road trip up north, thru Colorado and then some, the heated throttle body may have a purpose then lol.
     
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  9. Oct 24, 2019 at 7:41 PM
    #39
    GAknight

    GAknight New Member

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    Too many…scratch that…not done yet.
    FWIW, I've been in CO in sub-freezing temps the last two years (for weeklong+ hunting trips) and not had any issues. Last year it snowed the first, two days and stayed on the ground for most of the trip. If I was in those temps for months on end, I might change it back, but for short term, mine did just fine.
     
  10. Oct 24, 2019 at 8:51 PM
    #40
    ZPMAN

    ZPMAN 2nd place is the 1st looser

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    Think it would be a great benefit to bypass and would have done it if only I lived in the south. 85`f is hot for Duluth MN and most of the winter my BD says 0 , I think it 0s out around the upper 30s. Thease are my temps running 75-80 mph last week.
    20191019_195613.jpg
     
  11. Feb 18, 2020 at 6:21 AM
    #41
    Cthulhu

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    Probably a stupid question, but here it goes...:)

    When doing this mod, is there a way to flush out the existing coolant from the throttle body before capping it off?
     
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  12. Feb 18, 2020 at 6:31 AM
    #42
    GAknight

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    Too many…scratch that…not done yet.
    [/QUOTE]

    I just took mine off and dumped it. Of course that was in part bc I also did the screen delete, and ported and polished the tb.
     
  13. Feb 18, 2020 at 6:36 AM
    #43
    15whtrd

    15whtrd Mr. Blonde

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    Air compressor?
     
  14. Feb 18, 2020 at 11:41 AM
    #44
    Cthulhu

    Cthulhu The White and Black Goat of the Woods

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    I just took mine off and dumped it. Of course that was in part bc I also did the screen delete, and ported and polished the tb.[/QUOTE]

    Great ideas!!
     
  15. Jul 23, 2020 at 8:12 PM
    #45
    MTRock

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    Ok..So in a naturally aspirated Tundra? Is there really that much benefit? Also temps here are often well below 0F like -10 to -40 what then? Should it be reversed back to factory in the winter?
     
  16. Jul 23, 2020 at 8:31 PM
    #46
    SouthWestGA

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    So who is going to track MPG before and after this mod?

    you know,so the rest of us will know if it’s worth it!
     
  17. Jul 24, 2020 at 6:33 AM
    #47
    Stig

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    +/- 0.2mpg
     
  18. Jul 24, 2020 at 2:57 PM
    #48
    Wynnded

    Wynnded What MPG...

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    Had a drive today. Measured some temps with the engine idling in the drive after parking. Probably 40 miles, the last of it on the interstate (70 MPH) before making the mile 'hood cruise to the house. Two stop signs (20 MPH speed zones). I could hear the radiator fan pulling air from the stops matching engine RPM. One minute idle while I dashed inside to grab the IR thermometer, hood remained closed while doing so.

    Outside ambient temp: 70°F
    Engine radiator inlet (top hose): 177°F
    Engine radiator outlet (botton hose): 160°F-ish (can't recall exactly)
    Intercooler inlet* (the aluminum elbow at the cooler, not the hose): 75°F
    Intercooler outlet* (the aluminum elbow at the cooler, not the hose): 73°F
    Thermostat housing: 180°F
    Throttle body (w/out bypass modification): 166°F
    Top plate of S/C: 110°F
    TRD supplied S/C airbox (upper front of box facing the window cleaner reservoir): 90°F

    Fluke 62 Mini IR Thermometer. It will display an actual reading of what you're currently pointing it at as well as a MAX temperature for the current duration of holding the ON trigger. The temperatures recorded here are the MAX as indicated as I moved the laser around my intended target just slightly to collect the warmest spot.

    *Mounted in front of the radiator, NOT the to be confused with the heat exchanger within the S/C unit.

    I don't have the intention of doing the throttle body bypass as it does get cold here in the winter, and I don't think that it would be significant enough to offset the power loss of living at 8,000 ft elevation, even with the S/C (it's pretty dang rowdy as it is). This is all I can remember off the top of my head that seems relevant. Make of it what you will. Happy pondering! :monocle:
     
  19. Aug 13, 2020 at 4:00 AM
    #49
    jstyle

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    Maybe I missed something but how did you bypass it? Did you use a fitting to connect the two hoses together or does one just slip over the other???
     
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  20. Aug 13, 2020 at 8:05 AM
    #50
    Tundracollector

    Tundracollector [OP] New Member

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    You just reuse the same hose that’s going to the tb, there’s a crappy picture on the first page showing how to run it. Use one hose only.
     
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  21. Sep 18, 2020 at 7:05 PM
    #51
    TundraTXTSS

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    What does everyone use to cover the holes in the TB after removing the 2 hoses?
     
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  22. Sep 18, 2020 at 7:52 PM
    #52
    P-Factor

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    In the aviation world, carburetor heat is essential for eliminating carburetor icing during high humidity, low dew point and is usually applied manually. It is also a required (test) item during pre-flight run-ups. When applied, aircraft engines will drop several hundred RPM's due to warm air i.e. pre-expanded fuel/air mixture delivered to each cylinder while totally eliminating any beneficial effects of cold air intakes.

    I can only assume this same effect happens in all normally aspirated vehicles therefore bypassing carb heat in certain geographic areas makes sense. For me, I would prefer this to be a manual function and applied when climatic conditions warrant.

    Good thread. Thx.
     
    Last edited: Sep 19, 2020
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  23. Sep 21, 2020 at 2:42 PM
    #53
    HulkSmurf14

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    Tastefully enhanced...
    Could a person create a bypass with ball-valves so that when the temps are cold in winter, one could essentially just flip the valves back to OEM routing and when in the higher heat months (summer, one could again just "bypass" the TB coolant by flipping the ball-valves back to bypass? I like the idea of doing this in summer months but see the reason of "keeping" the OEM setup during especially the colder months...just spit-balling ideas...
     
  24. Sep 21, 2020 at 7:48 PM
    #54
    Trooper2

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    Sounds doable. Might need some more hose. And some nice full port ball valves with hose connections.
     
  25. Sep 28, 2020 at 7:23 PM
    #55
    Rubberdown

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    As far as carbs, isn’t it the atomization of the fuel that’s causing the gas to condense and freeze on the intake manifold? It’s not relative to outside temperature. For instance the Chevrolet inline 6 has an intake manifold that’s so hot you can’t touch it. Yet You have to have a heat riser for it to perform correctly Or at least some method of intake warming.

    With fuel injection directly on each cylinder this is not an issue still is it? Haven’t ever seen a manifold heater or whatever on a fuel injected vehicle. But there’s a lot I don’t know and I’m the first to admit it.

    Ryan


     
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  26. Nov 3, 2020 at 10:16 AM
    #56
    Tortuga83

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    Sooo, is anybody having problems with this mod?
     
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  27. Nov 3, 2020 at 10:53 AM
    #57
    Rica25

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    Not yet after about a year. But I live in California in Central Valley. So or temperatures are not crazy cold.
     
  28. Nov 3, 2020 at 11:13 AM
    #58
    Tortuga83

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    Cool, yeah I am in south Texas freezing temps maybe one week out of the year.
     
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  29. Nov 3, 2020 at 11:33 AM
    #59
    Rebel Tundra Man

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    Subbed, Might look into this with a 1/4" 3-way ball valve in the line incase that I ever want to revert back during the winter months. Have seen below 0 degrees around here in Kentucky before, not likely though.
     
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  30. Nov 3, 2020 at 11:40 AM
    #60
    Kung

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    So, if dirtydeeds recommended it, and it's $20 or so, it can literally be said dirtydeeds were done dirt cheap. :thumbsup:
     
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