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  1. #1
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    T-Maxx won't do wheelies?!?!?!?

    So I'm around my 15th to 18th tank i guess and i'm trying to tune my T-Maxx but I'm still a noob to all of this so I'm taking the tuning slow besides i got no good place to do long passes But here is the thing I can't get my truck to do wheelie's , at a complete stop directly to full throttle it bogs/stutters and would only move a little bit <- soo whats wrong here ? And before that directly to full throttle did work but it won't do wheelie's it would just slide to the side and won't go straight forward ....soo is it all still a tuning issue? I saw a vid on YouTube http://www.youtube.com/watch?v=f75_UXuQAUw ) of an untuned trx 3.3 that could do wheelie's so I'm getting really frustrated at my engine and btw I'm not really sure how well i did the break-in cuz this is the very first engine that i broke in myself oh and another thing is that i have the .15pro tires but one rear tire is installed backwards soo is that is what maybe causing it to not go straight when going full throttle from a complete stop? also i have stiffen my shocks with all the spacers i had left and tightened my slipper clutch PLEASE HELP!! I WANNA GET WHAT I PAID FOR THE TRX 3.3 AND THATS WHEELIESS :C

  2. #2
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    I can't get wheelies either, been then again, my engine stalls after a couple of minutes of run time anyhow...

  3. #3
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    if it stalls most probably your idle is too low , adjust on your idle screw or what i do is use my throttle knob on the radio but what i do is from what i heard not good xD but yea raise your idle or uhm richen your lsn cuz the lsn actually has an effect on the idle (from what ive noticed)

  4. #4
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    my idle screw is all the way out

  5. #5
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    still how come no wheelies? anybody?!?!?!

  6. #6
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    and btw i installed the reverse kit on the new tranny sooo maybe thats a factor of no wheelies?

  7. #7
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    i also have a 2-spd reverse transmission on mine too- that may be it...

  8. #8
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    Its a tuning issue and nothing more, you said it bogs (stutters) when coming off idle? Did you do a pinch test on the fuel line to see if you are running too lean or too rich. try pinching the fuel line close to the carb when the truck is just idling normally. it should run for about 3 to 5 seconds then speed up and shut off.. If it shuts off quicker, you are too lean at low end. If runs for longer you are too rich. When you get that sorted out, the high speed needle is next.. running flat out you should be pulling all the way to high RPM's..when you find the area where it won't go any faster, back the high speed needle out about 1/8 turn. You don't want to run too lean or you can hurt the engine. You should have a blue smoke trail, but not too much or its too rich. Ultimately you want to set the engine to what traxxas recommends for settings. they are a good starting point and are usually pretty close to what you will be running at. temps are not that critical, but you don't want the motor to be hotter than around 280 degrees or so.. Some engines run better hotter, but others like a little cooler.. Mine likes to be run around 230, but I've seen the same engine run great at 270...
    As for the 2 speed tranny.. that has nothing to do with it. I run a two speed and so does everyone else I run with.. we pull wheelie all day long and some are monsters.. several hundred feet.. You won't pull wheelies with bad traction and the original Chevron tires from the older Tmaxxas don't help.. It will still pull wheelies with them, but its harder for those tires to find traction.
    Maxx3.3/ rusty5700/ slash3800/ slash5700 /4tec3.3

  9. #9
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    Hey man, if your engine is properly tuned and it's still not doing wheelies
    Mak sure your slipper is tight enough. Make sure your rear end ident squatting down too much at take off. Also make sure your rear wheels are gripping enough

  10. #10
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    What's your elevation?

    Sent from Mars Curiosity.

  11. #11
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    cenracer1 , I have been trying to tune it to it's max but it feels like I'm turning the HSN lean forever and i don't have a temp gun or gauge to see if im overheating already so im trying to be very careful and leaning it little by little ..and i thought the hsn comes first before the lsn? Also I'm thinking about switching over to Pro-Line trenchers tires mounted on desperado 3.8" would these help with traction? or should i just go with the stock 3.3 tires and wheels(im not really getting the stock 3.3 wheels and tires but rather the e-maxx once for the rims)

  12. #12
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    Kyleb i think my engine needs to be tuned a little bit more and the rear end ain't squatting as much after a put in all my spacers but the truck just wont go straight when going full throttle from idle , it goes off to the side as if the other rear tire isn't getting traction , my right rear tire is always the dirtiest afterwards because all the stuff from the exhaust goes on that tire and i guess its making it not get traction maybe? but im soon getting a deflector which i hope will help

    BAD RC As for elevation it should be at its maximum for .15 pro trucks ( thats because i set all the spacers in) , i have the stock chevrons and suspension system but chassis is a 4907 extended chassis one.

  13. #13
    RC Turnbuckle Jr. Nitronaught's Avatar
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    When tuned properly a nitro engine (especially the TRX engines) usually do not show their full performance till at least 1/2-1 gallon of fuel has been used.....

    Also, remember to tune with just 1/2 a tank, especially if you have the stock TRX tank, it likes to lean up a bit as the fuel level drops below 1/2... Makes tuning a little hair pulling...

    I'd also check your LSN, use the pinch test. It's described here. http://traxxas.com/forums/showthread...ul-Tuning-tips.

    Also your suspension, if the rear is too soft, the energy from your engine is not transferring to the wheels and is being absorbed in the shocks.... SO maybe you need to stiffen up your rears a little and maybe have your front shocks adjusted to raise the front up a little..

    Heck I've spent 5 yrs trying to stop wheelies...

    AS far as people advising to tighten your slipper,,,, Keep it to factory settings, tightening a slipper too much defeats it's purpose....
    Founder of H.U.A.
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  14. #14
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    Quote Originally Posted by Nitronaught View Post
    When tuned properly a nitro engine (especially the TRX engines) usually do not show their full performance till at least 1/2-1 gallon of fuel has been used.....

    *Also, remember to tune with just 1/2 a tank, especially if you have the stock TRX tank, it likes to lean up a bit as the fuel level drops below 1/2... Makes tuning a little hair pulling...

    I'd also check your LSN, use the pinch test. It's described here. http://traxxas.com/forums/showthread...ul-Tuning-tips.

    Also your suspension, if the rear is too soft, the energy from your engine is not transferring to the wheels and is being absorbed in the shocks.... SO maybe you need to stiffen up your rears a little and maybe have your front shocks adjusted to raise the front up a little..

    **Heck I've spent 5 yrs trying to stop wheelies...

    AS far as people advising to tighten your slipper,,,, Keep it to factory settings, tightening a slipper too much defeats it's purpose....
    *Very important do that. If you want to remove the half tank lean problem, do this modification
    **Very funny lol
    Sl4sh MM2
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    Summit 1/10
    Sl2sh VXL

  15. #15
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    that's why i can't do wheelies- i have rear suspension really soft so I can do high speed turns without flipping.

  16. #16
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    Its all in the tuning.. get a temp guage and follow the traxxas tuning procedures.. Its funny but they really do know their engines. I don't like to run my maxx with a stiff rear suspension as it really hurts the trucks turning abilities, but it still pulls wheelies from a stop or quite often when moving up to 10mph.. Stock 3.3 and pipe.. It pulled more wheelies with the OS 18TM.. As Nitronaught stated.. I could do without the wheelies as well.. The wheelie bar helps, but the front still shoots for the sky.. very hard to turn when you can't steer.
    Maxx3.3/ rusty5700/ slash3800/ slash5700 /4tec3.3

  17. #17
    RC Turnbuckle Jr. Nitronaught's Avatar
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    Quote Originally Posted by Icero1 View Post
    that's why i can't do wheelies- i have rear suspension really soft so I can do high speed turns without flipping.
    Suspension tuning is a little tricky but if you follow the basics you will find you don't have to soften your ride to avoid flipping in turns... Usually that's due to the truck rolling it's weight to the outside shock causing the Center of gravity to rise enough along with inertia of the truck to pull it over onto it's lid...

    First, driving tip, if you brake too late into the turn it's going to want to flip, brake earlier then apply throttle to pull you through the turn... Remember you are 4WD...

    Next suspension basics...
    1. Use springs to increase firmness, not the pre-load spacers or adding preload with other shocks by reducing the amount of shock spring travel and putting them under a load.... Acutally pre-loading your shocks puts added strain on the shock shaft and piston inside... Pre-load is supposed to be used for fine tuning your ride height, the added firmness is a byproduct when used incorrectly.
    2. Shock oil weight,,, huge factor when changing springs. Shock oil sets the rebound speed of your shock.. If your truck is feeling bouncy AND likes to roll in the corners you might want to increase the oil weight. When the oil is too thin the speed of the shock and the dampening is allowing too much spring action and too much shock compression..
    Now on the other hand, if you are finding that your truck is losing traction when you gun the throttle and you are traveling across terrain this is a very good sign you are using too thick/too heavy a shock oil weight. What's happening here is that the rebound speed of the shock has been slowed down to the point that it can't maintain enough speed to keep the wheels on the ground, loss of traction.... Also if you use too heavy an oil weight you risk bending a shock shaft, rod end, or with some of the plastic shocks pop the cap off the top (you can also use aluminum shock caps to help with this)....

    Also never try to determine your shock setup by dead dropping your TMAXX to the ground to see if it bottoms out. Lack of forward inertia often fools the operator into making the shocks too stiff, too slow causing shock or other damage on a big jump...

    Should your truck bottom out... Only if you get too much hang time in the air and drop stright down with no forward motion. And it is OK to bottom out once in a while, hence why I like using RPM wear plates to help absorb those...

    Hope this helps...
    Founder of H.U.A.
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  18. #18
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    I also have been having problems with tuning. i can get it to idle, but it boggs at high speed. then i got the high speed problem fixed, and it has problems idling. once i got both problems mostly fixed it idles high and won't stay still. it will almost shift into second gear just idling.

  19. #19
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    I'm gonna keep on practicing Tuning, the majority of the answers says tuning so that's my priority. as for shocks its still hard to say if mine could help with wheelies it squats when i throttle but not all the way down and lastly i really am not sure if my old chevron tires are helping or not

  20. #20
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    Quote Originally Posted by Joker1982 View Post
    I also have been having problems with tuning. i can get it to idle, but it boggs at high speed. then i got the high speed problem fixed, and it has problems idling. once i got both problems mostly fixed it idles high and won't stay still. it will almost shift into second gear just idling.
    If it's your tune the sticky I linked to will help you solve that... It's been viewed over 70,000 times, haven't heard many complaints...

    Good luck with it,,, tuning is an acquired skill... Even top mechanics have to re-think a couple things when it comes to tuning these 36,000 rpm power houses...
    Founder of H.U.A.
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  21. #21
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    Quote Originally Posted by Nitronaught View Post
    If it's your tune the sticky I linked to will help you solve that... It's been viewed over 70,000 times, haven't heard many complaints...

    Good luck with it,,, tuning is an acquired skill... Even top mechanics have to re-think a couple things when it comes to tuning these 36,000 rpm power houses...
    Well said.. I've been messing with these little engines since the 80's and every now and then you get a tough one.I still look at the factory settings just to see where the needles should be and go from there. that being said the tuning guide is your best resource for learning to tune and running your engine to top performance
    Maxx3.3/ rusty5700/ slash3800/ slash5700 /4tec3.3

  22. #22
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    I went to a newly build racetrack here and i tried doing a wheelie on carpet and it works but still no wheelies on asfalt or sand

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