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Want Better Gas Mileage and More Power. Thoughts?

Discussion in '1st Gen Tundras (2000-2006)' started by Oregon 2006 Tundra, Oct 27, 2019.

  1. Dec 13, 2019 at 11:21 AM
    #31
    Hbjeff

    Hbjeff New Member

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    Apparently we need this again
     
  2. Dec 13, 2019 at 12:56 PM
    #32
    speedtre

    speedtre New Member

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    That's gonna be tough to do with a 5sp transmission....
     
  3. Dec 13, 2019 at 12:57 PM
    #33
    Tiamat

    Tiamat New Member

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    Also get a six speed transmission. Lol
     
  4. Dec 13, 2019 at 1:40 PM
    #34
    Darkness

    Darkness Allergic to white

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    I keep seeing injectors being suggested in a lot of threads, but has anybody showed evidence that they provide improvement other than "feels good"?

    Not knocking them but I'd like to see some science.
     
  5. Dec 13, 2019 at 1:51 PM
    #35
    FirstGenVol

    FirstGenVol Brake Czar

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    When I asked for honest feedback before most said that any improvement in MPG was very, very minimal. I'll eventually do them but I'm not expecting any improvement in MPG.
     
  6. Dec 13, 2019 at 1:52 PM
    #36
    tvpierce

    tvpierce Formerly New Member

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  7. Dec 13, 2019 at 2:49 PM
    #37
    revtune

    revtune New Member

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    2006 Tundra: Stock air intake 3 inch catback Magnaflow 13742 2.5 inch front lift 1.5 inch rear blocks 2014 sr5 4Runner wheels (17x7) 1.5 inch hub centric wheel spacers p285/70/17 Nitto Terra Grappler G2 Weathertech floor liners

    Paging wumbo-truck and hand model:D we need more testing darn it. Seriously we do, I’m interested too.
     
  8. Dec 13, 2019 at 3:13 PM
    #38
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    4 speeds rule! Less gears to muck up.

    Per the 12 hole injectors: I gained 12 mpg and added 60 harses (Scottish word for horse) hahaha

    Seriously, I’ve been very upfront on them. Negligible mpg. Makes sense as the fuel amount coming through the rail is regulated by the fuel pump and ECU and then again at the injector. The ECU is set to allow the same amount of fuel irregardless of injector.

    The fuel does atomize better for more efficient explosion per test tube youtubes vids. There has to be some improvement due to this. How much? Not sure.

    Where I do feel the difference is the gears seem to hold better rather than shifting quicker from 1st to 2nd the engine holds 1st longer and second longer. Keep in mind the new injector shifting happens per the Toy shift point speeds parameters still, but just a little longer than prior. Down shifting became very apparent afterwards (albeit slightly), as well. Before 12 holes was like no downshift feeling at all. Like it was in Neutral during slowing down coming to a stop sign/light.

    Keep in mind I did these 12 holes as an experiment. I just wanted to clean my OEM injectors, but the local cleaning cost of around $225 and two days minimum truck downtime made the $300 12 holes a no brainer ($75 premium for convenience plus upgrade). Maybe I sell the old ones?

    I’ve had these 12 holes for almost a full year now and they are great. Its hard to remember exactly how the truck was before exactly, but I’d say it drives much better. Almost like a small gear upgrade, although I don’t know what a real gear upgrade feels like. Truck shifting is seamless. The engine and transmission feel like ‘one’ where before the engine sometimes felt like it would spin higher than the transmission when pedal to floor.

    Sounds crazy how injectors make shifting feel different, but thats the best I can explain it. Do not do these for MPG gain.

    I’d like to see how a newer upgraded fuel pump would react with these 12 holes combo’d with 4.56 gears as suggested by Kieth. The cost is way more than its worth for me. Sounds fun though!
     
    Last edited: Dec 13, 2019
  9. Dec 13, 2019 at 3:18 PM
    #39
    4Runner

    4Runner New Member

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    Buy another truck.
     
  10. Dec 13, 2019 at 3:18 PM
    #40
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    One other thing is I really tuned my engine up during this past year. New coil packs, valve gaskets, engine de-sludge, new PCV, synthetic oil, polishing my radiator cap, etc.

    I’m sure all these engine optimizations helped somewhat, as well.
     
    because_wumbo-truck and Darkness like this.
  11. Dec 13, 2019 at 3:22 PM
    #41
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    A340f shift points per Toyota.

    upload_2019-12-13_18-22-37.jpg
     
  12. Dec 13, 2019 at 3:59 PM
    #42
    Darkness

    Darkness Allergic to white

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    Curious if it's similar to the brake line phenomenon, where it isnt that the part is better but that dirty injectors are swapped for clean ones.

    Speaking of swapping dirty for clean, I should do my fuel filter at some point. 230k it must be due.
     
  13. Dec 13, 2019 at 4:07 PM
    #43
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    This is one possibility. Although an argument can be made that I did use gas treatments every so often (STP) as a prevent to help injectors. Although from readings, the only real way to clean the injectors is micro-vibration sonic cleaning and then they pressure test and Ohms test.

    Anyways, the cost of the experiment was worth it.
     
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  14. Dec 13, 2019 at 5:54 PM
    #44
    Darkness

    Darkness Allergic to white

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    Oh no doubt. On TS forum we had an engineer who had his injectors cleaned professionally and did before/after flow tests. The flow rate did not really increase but all 8 injectors matched after the process which was the goal. He did not see a big improvement after but reported smoother idle and acceleration but admitted it may be placebo.

    The cost of the job was quite a bit higher than the 12 hole injectors, around $600 if I recall. Knowing that, if the goal is restored performance then these seem to be a great value. I'm just not sure that they would help with power or efficiency enough to offset the cost as an upgrade vs a restorative measure.
     
  15. Dec 13, 2019 at 6:11 PM
    #45
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Wow! $600 for injector cleaning? Thats huge. Brand new injectors run around $80-100 each.

    The 12 holes are reman’d. Basically used and then cleaned and new parts like rubber washers and filter do-hickies put on.

    I went back and read Keiths website about these injectors afterwards and what I was trying to describe above in post #38 makes sense now when matched up with Keiths description. The low end torque (holding gears/feeling like new gear upgrade was my description) and the engine and transmission feeling like one (by my description) is mid range power connection.

    I’d say its more than placebo, but not earth shattering OMG! It definitely feels better. I think going back to the old ones would make me sad.
    upload_2019-12-13_21-3-52.jpg
     
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  16. Dec 13, 2019 at 6:14 PM
    #46
    Darkness

    Darkness Allergic to white

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    Yeah, it included all the bench testing results before and after. It wasn't a simple rinse agent but a full process with calibration. I wouldn't do it but enjoyed the read.
     
  17. Dec 13, 2019 at 6:17 PM
    #47
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    There is a marine boat place that does all that around here for about $30 bucks an injector with 2 day turn around. They won’t video the process I’m sure, as they don’t need to.
     
  18. Dec 13, 2019 at 8:25 PM
    #48
    Aerindel

    Aerindel New Member

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    I want to be younger and have more money....
     
  19. Dec 14, 2019 at 5:07 AM
    #49
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Most people I know want better looking hands with money being a close second.
     
  20. Dec 14, 2019 at 5:26 AM
    #50
    glowblue

    glowblue From time to time

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    Yep...if gas mileage is an issue don’t get a truck or sell the one you have. There should be no complaining about MPGs if you are set on driving a truck (especially Toyota’s!)
     
  21. Dec 15, 2019 at 12:47 AM
    #51
    because_wumbo-truck

    because_wumbo-truck TTC#036 & 1st Degenerate

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    Lower your front end, run the lightest and smallest wheels and tires you can and remove all extra weight possible. Install Dirty deeds injectors and long tube headers with a high flow exhaust system. Feather the throttle like a grampa everywhere you go. Don't drive over 55mph.
     
  22. Dec 15, 2019 at 7:32 PM
    #52
    because_wumbo-truck

    because_wumbo-truck TTC#036 & 1st Degenerate

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    Maybe @dirtydeeds could grace us with some science on his product. However it makes sense that better fuel atomization would make for a better combustion. Similar concept is applied on v6 tacos with the TRD supercharger and 8th injector. It objects into the supercharger and the extra fuel is atomized by the supercharger
     
  23. Dec 15, 2019 at 7:36 PM
    #53
    because_wumbo-truck

    because_wumbo-truck TTC#036 & 1st Degenerate

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    Butt dyno says they made an improvement
     
  24. Dec 16, 2019 at 7:14 AM
    #54
    bmf4069

    bmf4069 Yup, that's car parts in a dishwasher

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    Fuck that fuel filter.
     
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  25. Dec 16, 2019 at 10:40 AM
    #55
    Trailscape

    Trailscape Zip Tie Wizard

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    I figure the best one could realistically hope for in one of these trucks for street mpg is 16mpg, maybe 18 highway. I don't know what it would take to reach that.

    I have everything I need in and on my truck. It's kind of a fat pig, and mostly mechanically stock yet I average 14/17.

    Diminishing returns, folks.
     
  26. Jan 24, 2020 at 11:31 PM
    #56
    Nonoffensivename

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    I have an 03 tundra limited 4x4, with this vehicle specifically I have noticed a huge difference in performance and mileage depending on the fuel I put in it... It runs phenomenally well with mid grade gasoline. I was a that very surprised at the difference, both premium and regular gas make it feel heavyier or more sluggish. Mid grade is peak without having to do anything to the vehicle
     
  27. Jan 25, 2020 at 4:15 AM
    #57
    speedtre

    speedtre New Member

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    Just my luck Costco only sells 87 and 93...welcome to the forum...:thumbsup:
     
  28. Jan 25, 2020 at 5:47 AM
    #58
    FirstGenVol

    FirstGenVol Brake Czar

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    I'm running 89 octane ethanol free the last 10 days and I swear my truck sounds a little better as well. Hard to describe. Not worth the .70 upcharge though.

    I always wondered why Lexus recommended premium fuel in the GX470 when its the same engine.
     
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  29. Jan 25, 2020 at 5:52 AM
    #59
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    This is a great question worthy of investigation.
     
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  30. Jan 25, 2020 at 11:30 AM
    #60
    revtune

    revtune New Member

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    2006 Tundra: Stock air intake 3 inch catback Magnaflow 13742 2.5 inch front lift 1.5 inch rear blocks 2014 sr5 4Runner wheels (17x7) 1.5 inch hub centric wheel spacers p285/70/17 Nitto Terra Grappler G2 Weathertech floor liners
    Look no further. Just tuned differently from the factory.
     

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