Simple system to cool the engine

Discussion in 'Modifications' started by MonkeyBikerCanada, Apr 4, 2018.

  1. MonkeyBikerCanada

    MonkeyBikerCanada New Member

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    Hello
    I have a honda ct70 1970 and I would like to know what are the simplest system to cool the engine, I do not want to install a radiator of oil cooling and having to change my oil pump for a more powerful but I would be close to install another type of smaller system. Also I would like to know what is the breather system with hotels that are plugged on the head as well as on the cover used to measure the oil.
     
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  3. Enginedoctor

    Enginedoctor Well-Known Member

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    Simplest system? Since you don't want to run an oil cooler, the options are limited. A member here, (fatcaat), or maybe more than one, have installed essentially "heat sinks" on the cylinder head. They screw in place of the valve lash caps, and Maybe even the cam chain cover. An oil cooler really does the job better, imo, it it's arguable that the exhaust port side of the head is the hottest part of the engine, so good idea to grab heat FROM there, but the oil flowing through everything makes it a great conduit for heat dispersion. I still recommend that avenue if you want to go crazy, but a stock engine shouldn't be overheating anyhow, unless its lean or overworked. Hope this little bit of info helps. Your question on the breather I can't answer as it seems indiscreet. Can you be more specific?

    Photo credit: fatcaat
    IMG_1273.JPG
     
  4. racerx

    racerx Administrator
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    No way around this one. The cooling system consists of: finned area (total surface) and oil flow. Thus, the only ways to augment cooling is to increase one, or both, of those. The simplest is installation of a high-volume oil pump, which also leaves the outward appearance unchanged. Adding an auxiliary oil cooler is the only way to increase the total amount of finned surface; an HV oil pump should be used with this. Those are G`Craft oil coolers on fatcaaat's engine; they bolt directly to the head, no external oil lines are used. The taller, finned, rocker covers help, a little; I'd not rely on them, alone, to significantly increase cooling. It boils down to basic physics...
     
  5. MonkeyBikerCanada

    MonkeyBikerCanada New Member

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    Thanks a lot for the reply guys its will try to find those G'craft " heat sinks" but if its G'craft, I think it think it will be a bit pricy because this company offers really exclusive things
     
  6. racerx

    racerx Administrator
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    If you want cheap, go with a conventional oil cooler. G`Craft is high-end, JDM, product...worth the price, but not cheap.
     
  7. MonkeyBikerCanada

    MonkeyBikerCanada New Member

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    Does anyone know a website where there are the best prices for takegawa, kitaco, G'craft etc parts? I already know Webike and Motorkit but maybe there are others with better prices?
     
  8. Deoodles

    Deoodles Well-Known Member

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    Keep in mind that the G’Craft with 5 plates is the biggest you can go and still bolt the engine guard on. I have it on my 108 for about a year and a half now with no overheating here in SC.
     
  9. MonkeyBikerCanada

    MonkeyBikerCanada New Member

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    Thanks for the informations Deoodles
     
  10. fatcaaat

    fatcaaat Well-Known Member

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    If you are looking for high end takegawa or kitaco parts, i usually buy all of them from webike japan. As for the engine posted above, those covers are actually not the graft ones, they are chinese coolers and they are mounted on top of a Honda Nice head mounted to a stock style engine and should be available off the webike site. They do make them for standard engine heads as well.

    Just for fun, I actually put these finned covers on my stock Honda Nice engine to determine their overall cooling capabilities. I usually follow the same standard procedure...warm the engine up good and then run a very specific 10 mile loop and monitor the oil temps. They are pretty effective, quite honestly. Over the course of the run, the temp was only 2 degrees C higher then my use of a traditional radiator style cooler. The left side cover is just a finned heat sink as are the valve covers. However the right side is actually an oil pass through...oil goes into that finned cover and circulates around. It doesn't spend a whole lot of time in there for sure, and honestly, not sure how much cooling effect it has there. What these things really do is create larger surface areas for air to hit and hence cools the head quite a bit, and therefore the oil that passes through the whole head.

    These coolers in that picture will not clear the downtubes of a stock CT70, but the graft ones that are 5-row supposedly do. To be honest, if the engine is stock and properly tuned, you won't be able to overheat it even if you run it at 9k for an hour straight. they are designed to take that kind of beating. Really, the honda Nice would take that beating as well without worrying about it, but I like to keep the temps just under 100c just enough to steam off any water in the crankcase.
     
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  11. kirrbby

    kirrbby Well-Known Member

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    Good stuff fatcaaat.
     
  12. MonkeyBikerCanada

    MonkeyBikerCanada New Member

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    Thanks a lot for these information fatcaaat i will go check on webike if i can find these cooler
     
  13. RMHRC

    RMHRC Member

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    Anyone fitted the G Craft bolt on coolers to the Honda Nice 110 engine? Do they simply bolt on and do they fit the Nice 110?
     

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