Temp gauge trouble shooting
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wrote on 28 Aug 2017, 23:49 last edited by declan
@terry-tz I think I got the jist if it after a while so the Evans stuff even at max temp you can remove the rad cap?
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@terry-tz I think I got the jist if it after a while so the Evans stuff even at max temp you can remove the rad cap?
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wrote on 29 Aug 2017, 08:06 last edited by
That's the whole point of the evans coolant. The temperature necessary to pressurise the radiator system is significantly increased.
As such it needs a higher temperature applied to it in order for thermal expansion to be a noticeable factor.
Hence why the coolant is used, it reduces the pressures exerted in the closed loop system.
Most radiator caps require .3 bar of pressure to actuate. In normal operating procedures, evans coolant doesn't hit this sort of pressure, ergo an expansion bottle isn't necessary for most of the yime.
But I still run one regardless.
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That's the whole point of the evans coolant. The temperature necessary to pressurise the radiator system is significantly increased.
As such it needs a higher temperature applied to it in order for thermal expansion to be a noticeable factor.
Hence why the coolant is used, it reduces the pressures exerted in the closed loop system.
Most radiator caps require .3 bar of pressure to actuate. In normal operating procedures, evans coolant doesn't hit this sort of pressure, ergo an expansion bottle isn't necessary for most of the yime.
But I still run one regardless.
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wrote on 29 Aug 2017, 14:58 last edited by
I'm not participating in this debate
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wrote on 29 Aug 2017, 16:23 last edited by
@terry-tz hahaha
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wrote on 29 Aug 2017, 16:56 last edited by
Evans actually run hotter than normal cooling, so yeah, not for me either.
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wrote on 29 Aug 2017, 17:38 last edited by
@terry-tz it's not an issue I was just wondering why not all bikes have them
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wrote on 29 Aug 2017, 17:40 last edited by
it was probably just a way to save money I mean really you could make any bike not need one or car but it's more of a safety thing really
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it was probably just a way to save money I mean really you could make any bike not need one or car but it's more of a safety thing really
wrote on 29 Aug 2017, 17:53 last edited by@terry-tz 
New tyre yo
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Evans actually run hotter than normal cooling, so yeah, not for me either.
wrote on 29 Aug 2017, 18:38 last edited by@jens-eskildsen Ahh but you're missing the point slightly there.
It may run hotter, however there will be less pressure exerted in the cooling system. The result is less strain on the cooling internals.
The fact it has a higher boiling temperature also mitigates against the risk of localised boiling on the cylinder head, offering a more even distribution of thermal expansion.
Again, this is all theory bull.
It has been proven to have advantages in its own right. I'll agree and say I may have not noticed them.
Remember, the heat of the flame under the spark plug is a damn sight higher than the coolant temperature. So if the coolant raises by a few degrees, this should still be lower than the heat of the piston crown.
So long as the heat within the engine resides within the temperature specified by the manufacture, there shouldn't be a problem.
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wrote on 30 Aug 2017, 05:53 last edited by
If coolant is boiling, something is off. youre not curing anything by changing the coolant to something that isnt boiling at that temp, but is actually running hotter. Thats treating symptons, not fixing whats wrong.
I kinda like this one
https://www.youtube.com/watch?v=VACKWvcXbXA -
wrote on 30 Aug 2017, 07:43 last edited by
Have to say though, heat transfer is interesting in wankel designs.
But, If your worried about cylinder head localised boiling in a modern 2stroke!?
then you have completely missed the point also.
You could run a 4stroke for longer on alcohol based coolant, sure.
What benefit to a 2stroke engine at least, does Evans coolant possibly have to performance?
Its a negative in almost all aspects of operating temperature.
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If coolant is boiling, something is off. youre not curing anything by changing the coolant to something that isnt boiling at that temp, but is actually running hotter. Thats treating symptons, not fixing whats wrong.
I kinda like this one
https://www.youtube.com/watch?v=VACKWvcXbXAwrote on 30 Aug 2017, 09:20 last edited by@jens-eskildsen In peak summer times, my DT recorded a temperature of around 110 degrees using my vapor unit whilst sat in traffic.
The water did not boil, but no doubt there was a lot of pressure on the cooling system itself. This was prior to using evans.
Ultimately that was when my bike was a commuter. It isn't any more and I doubt I'll be sat in traffic for long periods of time.
Where I will be ripping up the B roads the coolant will have plenty of time to regulate.
In this instance, evans coolant requires no maintenance. There is no corrosion to worry about and it doesn't require anti-freeze.
Therefore it offers minimal maintenance when compared to normal coolant.
For this reason, I will continue to be using it on my project bikes as they will no doubt be left in storage.
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wrote on 30 Aug 2017, 12:01 last edited by
Id rather fix the problem and install a fan
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Id rather fix the problem and install a fan
wrote on 30 Aug 2017, 12:30 last edited by@jens-eskildsen I agree, if there is a problem, evans coolant isn't solving the issue, it's masking it.
I didn't have a problem, and I didn't mean to suggest using evans was an adequate solution to an overheating issue, as it is not.
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@jens-eskildsen I agree, if there is a problem, evans coolant isn't solving the issue, it's masking it.
I didn't have a problem, and I didn't mean to suggest using evans was an adequate solution to an overheating issue, as it is not.
