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Trying to keep my engine cool

Discussion in 'Nitro Engines' started by Scottbot302, Sep 12, 2017.

  1. Scottbot302

    Scottbot302 Active Member

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    Hey all. Savage has been running good ever since i did the tank mod, threw in a Fresh Cold O.S plug. Finally been able to get a decent tune, running a little rich right now actually. But I've run into some problems involving heat of the engine. She likes to get hot really quick, id say around 7-10 minutes depending on temps. I've checked the engine multiple times for air leaks, sealing issues, compression tests, etc. It all checks out, but the thing still gets hot. I've cut out the entire windshield on the original body. I'm getting a new body soon and I'm going to cut holes appropriately. How do you guys keep your engine cool / what are your runtimes? any tips? I'd like to add some runtime that didn't mean stopping every 7 or so minutes.

    P.s - I do a lot of speed runs up and down the street. Full throttle for a run or two, then cool down lap, repeat that and thats usually what I do.
     
  2. coreyh29645

    coreyh29645 Active Member

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    what temps do you get to?
     
  3. Scottbot302

    Scottbot302 Active Member

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    Stopped at 260 F
     
  4. olds97_lss

    olds97_lss Well-Known Member

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    260F isn't too bad on a 80F+ day.

    Too high of gearing will cause it to strain and run hot. Too low of gearing and running at WOT for a long time will also cause it to run hot.

    My engines run between 230-255 all day long when it's 80F out. I don't do anything special other than be aware of my gearing in regards to how the engine is doing with it.
     
  5. Scottbot302

    Scottbot302 Active Member

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    I'm running a 17T clutch bell and stock spur which I think is 60T. However, It appears my clutch bell seems to rub against the spur a little bit when it should spin freely. need to look in to that... seems fine when running though.
     
  6. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    The spur should be like a 46, 47, 48 or possibly a 52 if is an XL, and any undue rubbing by the spur/ bell will cause heat buildup to be a factor in engine temps...

    Is your gear mesh too tight perhaps? you need just a tick of play between the bell and spur when holding the bell still and rocking the spur slightly...

    Maybe a clear pic or 2 will help someone see something amiss so please post if you can....
     
  7. Scottbot302

    Scottbot302 Active Member

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    Gear mesh is fine, but i think its a 47T actually. Its the steel spur the truck came with. When I was rebuilding the entire clutch, I got a new collet, cranked that thing down as hard as i could and the flywheel seemed like it was farther away from the block then it was before. Starting to think thats whats giving me this heat problem, but I don't know how Id solve it... suggestions???
     
  8. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    Pics are going to help alot if you want suggestions
     
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