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  1. #1
    RC Turnbuckle Jr.
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    I do NOT know WHAT TO DO!!!! Hit tree!!!!

    Ok so I was driving the other day going super fast like fully wide open throttle for a solid 4 minutes straight. Man this thing revs high.

    Anyway so all of a sudden WHAMO I lose control over the truck and it takes a b-line straight for a tree. Well it didn't quite hit the tree dead on cause the truck hit a rock 1st and flipped it sideways. So the truck hit the tree roof first basically. It just died.

    I got the truck to start again but it makes this really weird loud clanking/griding noise. I have also noticed I am missing part of the cooling head... is this a problem? Or will it improve performance running a little hotter? Before the crash I was seeing temps in like the 270 range is this a good temp?
    complete n00blet

  2. #2
    RC Racer
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    Running hotter will not help your performance. its like over heating your car. 270 from my experience is way to high. as for your high idle you need to play with your hsn and lsn(hsn first) to get the idle down. it should be just a little below the point where the truck wants to slowly roll on its own...just to clariify the truck should not move on its own. the missing chunk of the cooling head should be addressed and the cooling head should be replaced. the grinding noise could be a busted part of piston or sleeve or bearings. your loss of control could be because of the tune you have on it or because your radio either got out of range..had interferance or battery died..

  3. #3
    RC Racer
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    Sounds to me like you should replace the cooling head and while you have it apart you could pull the reat of the engine apart and check the bearings. The noise your hearing is probably a bearing that cracked apart when you hit the tree.

  4. #4
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    New batteries in transmitter and truck also. Sounds like the reason you lost control were weak batteries. Should also install failsafe. That will prevent "runaways" Had the same happen to me.... no tree, just a wide open field of brush. Almost caught the entire field on fire cuz I couldn't get to it fast enough. The noise could be a wide array of things from bearing to gears in the tranny. Might be easy fix or might be a tough one. Narrow it down and be more specific and we can help. Some good dudes on here with a ton of knowledge.

  5. #5
    RC Racer
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    Quote Originally Posted by FASTMAXX86 View Post
    as for your high idle you need to play with your hsn and lsn(hsn first) to get the idle down. it should be just a little below the point where the truck wants to slowly roll on its own...just to clariify the truck should not move on its own.
    Um... No pun intended but you don't want to mistake the HSN for the idle adjustment screw.
    Last edited by Monte_1977; 06-12-2012 at 11:25 PM.
    Traxxas Nitro Sport w/ TRX 3.3 Racing Engine

  6. #6
    RC Racer
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    Im not..lol..but i did forget to add that in...check all 3... to rich of a fuel mixture can cause any engine to idle high

  7. #7
    RC Racer
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    Too rich? Dont you mean too lean? I would think that if its too lean that the engine would be tend to idle high. Then again... if the needles are set to the factory baseline settings and the temps and the rpm's are climbing, I would think there is an air leak coming from somewhere causing it to run lean.
    Traxxas Nitro Sport w/ TRX 3.3 Racing Engine

  8. #8
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    Whether its too rich or lean it can cause a high idle and make your truck go forward. As for your cooling head being bent its fine to run if just the fins are bent and the air just passes through the fins to cool down your block. A few bent fins will hurt nothing... Now if the base of the cooling head ( where the head meets the block) is warped and it's not airtight, that will cause an issue and will need replacing

  9. #9
    RC Turnbuckle Jr.
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    OK what are the HSN and LSN?!?!?!?!?!?!?!?!?!?!?!

    How do I 'tune'????

    What is too rich and too lean? What do you mean by this?

    What is a failsafe???? I will check the batteries

    Is it safe to run my truck with a broken bearing? Maybe just for a tank or two?
    complete n00blet

  10. #10
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    Just go to Traxxas support and look up tuning nitro engines.
    Whereabouts in bc do you live. Im from bc as well
    What remote are you using? The 2.4 has a built in fail safe. If your running the remote with a long antenna You either gunna have to upgrade your radio or buy a failsafe

  11. #11
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    Quote Originally Posted by Tuskony View Post
    OK what are the HSN and LSN?!?!?!?!?!?!?!?!?!?!?!

    How do I 'tune'????

    What is too rich and too lean? What do you mean by this?

    What is a failsafe???? I will check the batteries

    Is it safe to run my truck with a broken bearing? Maybe just for a tank or two?
    Dont run your truck with a broken bearing.
    First things first...You should remove your engine and thoroughly inspect everything for damage.
    Look for cracks in the engine crankcase, and carb body,header mount, etc.
    You should also open up your engine and inspect the internals. Look for cracks in the piston skirt,
    look for metal shavings in the crankcase and combustion chamber. Check the action of your engine bearings.

    Give your transmission an inspection. Look over your spur gear (large gear mounted to the transmission)
    Look for sheared off gear teeth, turn the spur gear, listen for grinding noises.
    Do the same with your clutch bell.
    Inspect your motor mount and EZ Start (if equipped).

    If everything checks out, replace your cooling head reinstall your engine and reset your needles if neccessary.

    One more thing....While your cooling head is off, look at the top of the piston. If it's a brownish color, you're running too lean and could jeapardize the life span of your engine.
    Last edited by TastesLikeChicken; 06-13-2012 at 09:00 AM.
    My Karma runneth over your Dogma.

  12. #12
    Marshal Nitronaught's Avatar
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    Quote Originally Posted by TastesLikeChicken View Post
    Dont run your truck with a broken bearing.
    First things first...You should remove your engine and thoroughly inspect everything for damage.
    Look for cracks in the engine crankcase, and carb body,header mount, etc.
    You should also open up your engine and inspect the internals. Look for cracks in the piston skirt,
    look for metal shavings in the crankcase and combustion chamber. Check the action of your engine bearings.

    Give your transmission an inspection. Look over your spur gear (large gear mounted to the transmission)
    Look for sheared off gear teeth, turn the spur gear, listen for grinding noises.
    Do the same with your clutch bell.
    Inspect your motor mount and EZ Start (if equipped).

    If everything checks out, replace your cooling head reinstall your engine and reset your needles if neccessary.

    One more thing....While your cooling head is off, look at the top of the piston. If it's a brownish color, you're running too lean and could jeapardize the life span of your engine.
    +1 Do a thorough inspection, test you linkages by removing them from the servos, pull your skids,,,,

    Pull the motor, check your CB.

    Also a note: When you have verified your suspension, bulks A-arms and bearings have no issues or resolved the issues, go over you head bolts, exhaust, fuel tank and fuel lines.

    If you find you have gotten rid of all that and you are finding tuning issues, high irratic idle, having to richen it up way more than usual,,,, Try spraying some WD-40 at the base of the carb with the engine running. If the idle changes when you do this,, you've got a cracked carb... USually happens around the HSN housing. This is something you definitely look at...

    Hey, I've ran into a Chevy S-10 at full throttle, slammed right into the crossmember of it's chassis.... The S-10 won of coarse... THing is I was 2 weeks away from the State race I was entered in. I managed to get it all in shape and placed 15th with what started as this...



    How do you like the bend in this 6061 T6 RCRaven Chassis?


    I actually raced with this motor after a new CB, Clutch and CB bearings, New Header and New carb,,, yes it was cracked at the HSN housing .



    It turned into this



    Race day



    It's a hobby,,, a labor of passion. I can tell you one thing.... That's the LAST time I ever run my ride without a lid on or down a public street.... Never again... My wallet can't take it...
    Founder of H.U.A.
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  13. #13
    RC Turnbuckle Jr. troutfisher9's Avatar
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    Tuskony...Really? I think your account got hacked.
    With a purposeful grimace and a terrible sound...

  14. #14
    RC Turnbuckle Jr. Snook Man's Avatar
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    I would have to agree.^^^
    No slipper/tall gearing/power = broken parts.

  15. #15
    RC Turnbuckle Jr.
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    Quote Originally Posted by troutfisher9 View Post
    Tuskony...Really? I think your account got hacked.
    I am a complete n00blet!
    complete n00blet

  16. #16
    RC Racer
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    hey nitro what was the origan of your ride ??? the pic on race ay looks sweet. best of luck on your next race.

  17. #17
    RC Champion
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    Quote Originally Posted by Tuskony View Post
    I am a complete n00blet!
    oookay....how can you be a noob when you have over 3,600 posts????
    270 is Way too high for a temperature! Second, NEVER EVER keep your engine wide open throttle that long...thats just plain abuse and asking to break it. I am extremely surprised it even started again.
    And, when your light on your transmitter is blinking, immeditaly shut the car off and replace the batteries.
    Tuning is basically just adjusting the needles to adjust the fuel to air ratio.
    Go on youtube and watch a video on that. Don't even start a nitro engine unless you know how to tune it.

    And yes, it definitely sounds like your account got hacked because nobody with over 3,600 posts is a noob.
    Sting like a butterfly and punch like a flea, jack

  18. #18
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    Quote Originally Posted by Tuskony View Post
    I am a complete n00blet!
    what the hacked....

  19. #19
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    Man look at squirrels tuning guide on youtube.
    Cars: erevo vxl, 1/16 summit, stampede vxl, tmaxx

  20. #20
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    Quote Originally Posted by revomaxx2223 View Post
    Man look at squirrels tuning guide on youtube.
    +1^ http://www.youtube.com/user/Squirrelod

  21. #21
    RC Turnbuckle Jr.
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    I am confused
    complete n00blet

  22. #22
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    Quote Originally Posted by Tuskony View Post
    I am confused
    no response ....

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