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Thread: Overheating???

  1. #1
    RC Racer
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    Overheating???

    Hey all. I have out about 2.5L through my revo and i have recently got traxxas link. Is it normal after a few tanks that it runs at 300+Farenheit?
    I started it on break-in settings and i was richening it till it got to probably about 5 turns out from closed and it was still running very hot after a few wot passes?
    Im running 20% nitro byrons

    Thanks for any help.

  2. #2
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    I thought it was between 3.5 and 4 turns out,somebody much more experienced than me will help out

  3. #3
    Marshal Double G's Avatar
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    How about the LSN? A lean LSN will heat the engine up--the engine should be cooling at idle. Check to make sure air is entering through the air filter and exiting the stinger. Any other place will create a lean condition.
    The Super Derecho

  4. #4
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    lsn is ok. it cools 1 degree every second or 2, it drops at a steady pace. its a new engine pretty much. Also i have cut a nice large hole on windscreen for air to pass through. at one point today though it was very rich, alot of blue smoke, running sluggish because its rich and yet still climbing to 300+

  5. #5
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    Where are u getting that temp reading from? Handheld temp gun?

    If you are not buying spare parts, you are going too slow!

  6. #6
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    if you running it in cold temps and you are 5 turns out and still getting performance then you need to richen it up again.... stock is 4 turns out..


    if its higher than 70degrees F and you are 5 turns out and still getting performance then start looking for an air leak in your fuel delivery system..
    you know.. i never had a sig.. but i do now...

  7. #7
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    I am in AZ. We've been about 82* during the day lately. I've got a good tune and with a revo platinum body with a section of the front windshield cut out, I run about 255.

  8. #8
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    The window cutout dropped me a good 5-10 degrees depending if I'm rock crawling or doing WOT runs.

  9. #9
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    Quote Originally Posted by mertymen_jato View Post
    Hey all. I have out about 2.5L through my revo and i have recently got traxxas link. Is it normal after a few tanks that it runs at 300+Farenheit?
    I started it on break-in settings and i was richening it till it got to probably about 5 turns out from closed and it was still running very hot after a few wot passes?
    Im running 20% nitro byrons

    Thanks for any help.
    If the temp sensor wire of the telemetry is to tight or to low on the cooling head it will read to hot and if it's to loose or to high on the head it will read to cool. The only way I know of to get the telemetry temp reading close to right is to use an infrared temp sensor and adjust the wire until the number is the same as the infrared sensor.

  10. #10
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    did not know what traxxas link is... so use infrared temp gun first and compare .. what he said ^^^^
    you know.. i never had a sig.. but i do now...

  11. #11
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    How r u getting 300? In the ipod screen? Temp gun? Estimate?

    If you are not buying spare parts, you are going too slow!

  12. #12
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    It displayed it on the traxxas link screen and on my multimeter. I was doing WOT passes so wasnt too slow. Can it really be air leak in engine when its pretty much brand new? I have used it 3 times.

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    The temp outside was about 55 - 60 Farenheit

  14. #14
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    richen it some more if you still have good performance and if the performance drops because its to rich then lean again at 1/8 at a time...
    you know.. i never had a sig.. but i do now...

  15. #15
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    Ok ill give it a go at the weekend. Thanks everyone

  16. #16
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    Quote Originally Posted by mertymen_jato View Post
    Ok ill give it a go at the weekend. Thanks everyone
    Dude I have the exact same problem. To the t. I have about 5-6 tanks through after the break in and I'm running hot all the time. My wire for the traxxas link is in the lowest ring of the cooling head. That's where traxxas installed it. I can't see an air leak since engine is brand new. I'm thinking it could what mark is saying. I'm gonna shoot it with a temp gun and compare.

  17. #17
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    I have found an air leak behind the flywheel on the front bearing. When i block air filter and exhaust port and blow through tube it bubbles at the flywheel/bearing. Do i need to replace or can i make a fix somehow?

  18. #18
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    Quote Originally Posted by mertymen_jato View Post
    I have found an air leak behind the flywheel on the front bearing. When i block air filter and exhaust port and blow through tube it bubbles at the flywheel/bearing. Do i need to replace or can i make a fix somehow?
    What did you blow threw.

    Is there an acceptable limit with an air leak.
    Last edited by Double G; 03-18-2014 at 10:44 PM.

  19. #19
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    i blew through the tube that goes to the carb. blocked the air filter inlet and exhaust outlet. It was blowing a few bubbles through the front bearing behind the flywheel.... I have read alot of places though that it is expected that it will leak from there. I havent noticed and nitro leaking so maybe its ok? I have re-adjusted the temp sensor so its not at the back of the engine but on the side. Maybe its alot hotter at the back seeing as no air is hitting that part compared to the front. I will give it a go at the weekend and let u all know if its still reading 300+.

  20. #20
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    its hotter at the back of the engine because the exhaust right there.. try measuring at the glow plug with a temp gun
    you know.. i never had a sig.. but i do now...

  21. #21
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    Quote Originally Posted by mertymen_jato View Post
    i blew through the tube that goes to the carb. blocked the air filter inlet and exhaust outlet. It was blowing a few bubbles through the front bearing behind the flywheel.... I have read alot of places though that it is expected that it will leak from there. I havent noticed and nitro leaking so maybe its ok? I have re-adjusted the temp sensor so its not at the back of the engine but on the side. Maybe its alot hotter at the back seeing as no air is hitting that part compared to the front. I will give it a go at the weekend and let u all know if its still reading 300+.
    I forgot to mention that part, sorry, thanks for reminding me. The sensor needs to be centered between the carb and header, closer to the carb will read cooler and closer to the exhaust will read hotter.

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