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  1. #1

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    Jato 3.3: Engine Tune

    When I aply brakes my car ussualy stals, or when i let go of the throttle and car is about to stop it stalls too.
    What should i do ???
    GO JATO OR GET LEFT BEHIND

  2. #2

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    RE: Jato 3.3: Engine Tune

    your tank dry?too lean?bogs because it's to rich?....be more specific when you apply the brakes and stuff.there are multiple possibilities with that sort of problem
    traxxas nitro sport 2.5R

  3. #3

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    RE: Jato 3.3: Engine Tune

    so ok iam ridding my car in da street or what ever, now i can go full throttle but the thing is when i try to totaly to stop my car stalls so in order for me to stop i have to apply the brakes 4 a little and the let go and do that couple time to stop when my car is going like 5 mph i try to turn 180 degreese i have to let go off the throttle thats when my car stalls, the fuel tank is full and it might be too rich or lean cuzz Im still learning how to tune cars
    GO JATO OR GET LEFT BEHIND

  4. #4
    avg_joe's Avatar
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    RE: Jato 3.3: Engine Tune

    Sounds like your idle is too low.
    If it just slows down too much and shuts off, it's probably the idle.
    If it blubbers, 4-strokes, and sounds wet, then it's probably a slightly rich lsn.
    I always knew it was a good idea to keep all this junk...If only I could find that part in all this junk...q;\\

  5. #5

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    RE: Jato 3.3: Engine Tune

    yeah it does sound like a rich engine too me too, but which screw should i turn the high speed or the low ???
    GO JATO OR GET LEFT BEHIND

  6. #6

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    RE: Jato 3.3: Engine Tune

    LSN controls your fuel delievery at idle, turn it in a tiny bit at a time to see if it gets better(lean it out). Watch for smoke on acceleration, too much means your needs are rich. I would suggest a temp guage if your need to tuning, it could save you a motor and help you understand how to tune.
    75% driver/50% set up/-25% vehicle=My kind of race.
    Knowledge is power/knowing what to do with it=win

  7. #7

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    RE: Jato 3.3: Engine Tune

    Just remember lean is mean

  8. #8

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    RE: Jato 3.3: Engine Tune

    So if i get the temp guage how would it help me ??? Is there like a tuning by temp ??
    GO JATO OR GET LEFT BEHIND

  9. #9

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    RE: Jato 3.3: Engine Tune

    A temp gauge will help you if your new to tuning by giving you another way of seeing if your too lean or rich other than by smoke sound or performance. Generally a temp gauge is not the most accurate way to get a good tune, but it is a good guideline. Most engines run good anywere between 220 and 270 degrees give or take some. Too low of a temp usually means your too rich and too high of a temp generally means too lean.
    75% driver/50% set up/-25% vehicle=My kind of race.
    Knowledge is power/knowing what to do with it=win

  10. #10

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    RE: Jato 3.3: Engine Tune

    Thank you i will consider buying it
    2day i was tryin to tune my engine every thing seems good for beginner me but my car starded to creep forwardwhich screw should i turn or not turn
    And right now if iam going like half throttle there are no blue smoke but if i push it fas to the end the smoke is comin out like for 2 sc. is it good ?? or no ??
    GO JATO OR GET LEFT BEHIND

  11. #11

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    RE: Jato 3.3: Engine Tune

    Does it have a high rpm at idle? If so you might have it set too lean on the LSN or your idle screw is set too far in not allowing the throttle to close enough to let it idle down. I would richen the LSN a bit and see if it idles down. If not then probably have to adjust the idle stop screw some to get it to idle down. Blue smoke is good on full throttle take off. You want to see some so you know your not going to lean.
    75% driver/50% set up/-25% vehicle=My kind of race.
    Knowledge is power/knowing what to do with it=win

  12. #12

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    RE: Jato 3.3: Engine Tune

    where can i find the idle stop screw ???
    Would the car stop if i try to turn the throttle adjustment screw on my controler??
    GO JATO OR GET LEFT BEHIND

  13. #13
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    RE: Jato 3.3: Engine Tune

    its either a high idle, or you have snapped a clutch spring as u said it creeps forward, can u hold it on the ground still while its idling?
    8ightT:Go21, MBX5R:RBC6, FT NTC3:RBC12, 8000kv RC18T, MGT:M427, F103, NEVST, FASST 2.4, Spek 2.4

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    RE: Jato 3.3: Engine Tune

    well like i said its creeping foarward so no and when i press barkes it stalls...
    but when i pick the car off the ground it can run for like 3 minutes
    GO JATO OR GET LEFT BEHIND

  15. #15
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    RE: Jato 3.3: Engine Tune

    You need to look at the manual...I'm sure it has a diagram or picture illustrating which screw performs what function.
    I always knew it was a good idea to keep all this junk...If only I could find that part in all this junk...q;\\

  16. #16

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    RE: Jato 3.3: Engine Tune

    i tryed and found but the word the mension i have no clue what they mean (
    GO JATO OR GET LEFT BEHIND

  17. #17
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    RE: Jato 3.3: Engine Tune

    ORIGINAL: FastestJato

    where can i find the idle stop screw ???
    Would the car stop if i try to turn the throttle adjustment screw on my controler??
    Turn the throttle screw out to lower the idle...

    If you adjust the transmitter too much you may be applying the brakes then they will always be dragging when you are not on the throttle...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Florida Gods Waiting RoomCheck Gallery for Pictures
    Jato 3.3 |Cen Nemesis (broken...) |Lunchbox |ST-15 |Mario Kart DK

  18. #18

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    RE: Jato 3.3: Engine Tune

    thank you nick this helped me a lot
    did u took out ur whole engine cuz of me ??? LOL
    GO JATO OR GET LEFT BEHIND

  19. #19

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    RE: Jato 3.3: Engine Tune

    lol just let me know if you want a picture of a 3.3, I have mine out because.... whell.... how do I put this nicely, the 3.3 isn't the best engine I have owned, and I have had 2 of them and they both ran into problims after the 1st gallon so I ended up replaceing the first one right before I finished the first gallon and the 2nd one I got about 1.5 gallons and it has problims. So I have a 18tm in it now and it out performs the 3.3
    Jato 3.3 with spektrum dx3, JD carbon turnbuckles, all rpm, trx cdv\'s, chrome low-mid resonator, aluminum shockbodys, + more

  20. #20
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    RE: Jato 3.3: Engine Tune


    ORIGINAL: FastestJato

    thank you nick this helped me a lot
    did u took out ur whole engine cuz of me ??? LOL
    No lol. I just went on ebay and found a couple good pics for you.

    Also this is a good article to help you learn to tune if you need help with that.
    http://www.rcuniverse.com/forum/m_5517128/tm.htm
    Florida Gods Waiting RoomCheck Gallery for Pictures
    Jato 3.3 |Cen Nemesis (broken...) |Lunchbox |ST-15 |Mario Kart DK

  21. #21

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    RE: Jato 3.3: Engine Tune

    when i get my engine tuned perfectly if i ever will and i glue the srew so they wouldnt be able to move would that work so i wouldnt have to retune my engine ever again ??




    I KNOW STUPID QUESTION BUT MABY IT WILL WORK ??
    GO JATO OR GET LEFT BEHIND

  22. #22

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    RE: Jato 3.3: Engine Tune


    ORIGINAL: FastestJato

    when i get my engine tuned perfectly if i ever will and i glue the srew so they wouldnt be able to move would that work so i wouldnt have to retune my engine ever again ??




    I KNOW STUPID QUESTION BUT MABY IT WILL WORK ??
    Lol I wish it worked that way. Your tuneing will change with the amount of water in the air (forgot what it is called) and the tempachure out side
    Jato 3.3 with spektrum dx3, JD carbon turnbuckles, all rpm, trx cdv\'s, chrome low-mid resonator, aluminum shockbodys, + more

  23. #23
    Nick2618's Avatar
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    RE: Jato 3.3: Engine Tune

    Source: http://www.rcuniverse.com/forum/m_5517128/tm.htm

    Keep in mind that an engines tune changes day by day, every time you get our your engine and run it, you should tweak the needles a little bit (typically). One day your engine can run fine, the next day it can be running extremely lean.
    NOTE: Tune the HSN first because it controls the full amount of fuel entering the carburetor, and then tune the LSN because it is a fine adjustment screw.

    As a side note, if you do a lot of wide open running at WOT (Wide Open Throttle, a.k.a. full throttle) your engine will need extra lubrication and it could need to be set 1/4th turn rich to ensure proper lubrication to your engine at high RPM’s.

    Here is a good little graphic that for the record I did not make, I simply found it very helpful.

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    Jato 3.3 |Cen Nemesis (broken...) |Lunchbox |ST-15 |Mario Kart DK

  24. #24

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    RE: Jato 3.3: Engine Tune

    but how about the real cars the concep is pretty much the same, so why dont we gave to tune the real cars ??
    GO JATO OR GET LEFT BEHIND

  25. #25
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    RE: Jato 3.3: Engine Tune

    Computer control changes the tune for us on 1:1 cars. Before that there was elaborate carburetor configurations with accelerator pump, secondary butterfly valves, little passages, and float systems, etc...
    Plus, just due to the sheer volume of fuel and air in 1:1 engines makes it easier to stay within the required parameters.
    I always knew it was a good idea to keep all this junk...If only I could find that part in all this junk...q;\\


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