Discussion
Here you go guys, directly from Evans:
Hi Stuart,
Further to telephone call please find information below - Water-glycol refers to the water/ethylene glycol (toxic) 50:50 mix in traditional cooling systems, and Evans relates to our waterless coolant (non toxic).
With regard to the flammability characteristics of Evans Waterless Engine Coolants, I hope the following information helps to ease your concerns;
1. Under extreme circumstances, such as a petrol fire in an engine compartment, both traditional water-glycol mixtures and Evans coolants can combust. We know that the water within water-glycol blends will evaporate/flash off (distil) when it comes in to contact with a very hot surface, such as an exhaust manifold. Subsequently both water-glycol coolants and Evans offer very similar risks when it comes to fire or fumes.
2. The conclusion of an independent team of forensic engineers, following extensive investigation, was that neither water-based coolants nor Evans coolants will combust when pooled on to a very hot exhaust manifold at 480°C - at this temperature the manifold will be glowing a dull-red colour. Combustion of water-glycol and Evans coolants was achieved when the manifold temperature was raised to between 665°C and 690°C - at this temperature the manifold will be glowing reddish-orange.
3. Apart from racing cars and heavy duty engines operating under extreme load it is very rare to see temperatures above 500°C or glowing exhaust manifolds.
4. At temperatures above 100°C the water content of water-glycol coolants will rapidly flash-off (distil) from an exhaust manifold, leaving behind the neat glycol – which can combust above 665°C.
5. Evans coolants have a very low vapour pressure and operate at about ¼ of the pressure associated to water-based coolants. This significantly reduces the likelihood of a burst coolant hose and virtually eliminates the potential for coolant to reach the exhaust manifold or be sprayed around the engine bay. This low vapour pressure can be demonstrated by (carefully) removing the radiator cap immediately after a long run – but don’t try this on a car filled with a water-glycol based coolant!
6. Over the last 18-20 years and over 600,000 conversions we have had no reports that Evans has been the cause of an engine fire. One racing car filled with Evans did have an engine fire, but the engine builder acknowledged this was likely down to poor maintenance and no blame was placed on Evans. Evans Coolants continue to provide many WRX racing teams (cars and bikes) with improved cooling, increased horsepower (output) and generally better performance.
In conclusion and when all things are carefully considered, it would be reasonable to state that Evans Coolants pose very little threat of an engine fire and no more than traditional water-glycol based coolants. Comparatively petrol and diesel fuel will always pose a significantly higher fire risk, as do electrical failures.
Best regards,
Chris Lewis.
Hydra Technologies Limited.
Tel : 01792 586800.
www.hydratech.co.uk
Hi Stuart,
Further to telephone call please find information below - Water-glycol refers to the water/ethylene glycol (toxic) 50:50 mix in traditional cooling systems, and Evans relates to our waterless coolant (non toxic).
With regard to the flammability characteristics of Evans Waterless Engine Coolants, I hope the following information helps to ease your concerns;
1. Under extreme circumstances, such as a petrol fire in an engine compartment, both traditional water-glycol mixtures and Evans coolants can combust. We know that the water within water-glycol blends will evaporate/flash off (distil) when it comes in to contact with a very hot surface, such as an exhaust manifold. Subsequently both water-glycol coolants and Evans offer very similar risks when it comes to fire or fumes.
2. The conclusion of an independent team of forensic engineers, following extensive investigation, was that neither water-based coolants nor Evans coolants will combust when pooled on to a very hot exhaust manifold at 480°C - at this temperature the manifold will be glowing a dull-red colour. Combustion of water-glycol and Evans coolants was achieved when the manifold temperature was raised to between 665°C and 690°C - at this temperature the manifold will be glowing reddish-orange.
3. Apart from racing cars and heavy duty engines operating under extreme load it is very rare to see temperatures above 500°C or glowing exhaust manifolds.
4. At temperatures above 100°C the water content of water-glycol coolants will rapidly flash-off (distil) from an exhaust manifold, leaving behind the neat glycol – which can combust above 665°C.
5. Evans coolants have a very low vapour pressure and operate at about ¼ of the pressure associated to water-based coolants. This significantly reduces the likelihood of a burst coolant hose and virtually eliminates the potential for coolant to reach the exhaust manifold or be sprayed around the engine bay. This low vapour pressure can be demonstrated by (carefully) removing the radiator cap immediately after a long run – but don’t try this on a car filled with a water-glycol based coolant!
6. Over the last 18-20 years and over 600,000 conversions we have had no reports that Evans has been the cause of an engine fire. One racing car filled with Evans did have an engine fire, but the engine builder acknowledged this was likely down to poor maintenance and no blame was placed on Evans. Evans Coolants continue to provide many WRX racing teams (cars and bikes) with improved cooling, increased horsepower (output) and generally better performance.
In conclusion and when all things are carefully considered, it would be reasonable to state that Evans Coolants pose very little threat of an engine fire and no more than traditional water-glycol based coolants. Comparatively petrol and diesel fuel will always pose a significantly higher fire risk, as do electrical failures.
Best regards,
Chris Lewis.
Hydra Technologies Limited.
Tel : 01792 586800.
www.hydratech.co.uk
well this is going to seem like a daft question, but does anyone have any experience of how it affects the warming up of the car?
the biggest problem i have living in Scotland is reaching my destination before the oil temp reaches 40 degrees. i stick to the recommended oil temp/rev range religiously, which can result in driving about for an hour before seeing 40.
would this coolant be more susceptible to reaching an operating temperature quicker, thus speeding up the oil temperature increase. or would it have the opposite effect of cooling the car too quickly, making it harder to warm up?
the biggest problem i have living in Scotland is reaching my destination before the oil temp reaches 40 degrees. i stick to the recommended oil temp/rev range religiously, which can result in driving about for an hour before seeing 40.
would this coolant be more susceptible to reaching an operating temperature quicker, thus speeding up the oil temperature increase. or would it have the opposite effect of cooling the car too quickly, making it harder to warm up?
Hi
I use it in a couple of my wedges for a trail and have no problems it works well, the cars heat up as normal, they just don't boil. Its strange being able to remove the filler cap with the engne up to working temp and not being covered with hot liquid!
O! The heater works well.
For those of you who have to occasionaly top up you water system, well you have a problem, leak etc, so your system can't be working proberly. fix that and then fit Evans and you should not have a problem. The person who says it doesn't mix. This is true but if you drain the system and use the Evans cleaning mixture, that removes any water in the system plus a lot of the muck in your system, before you fill the Evans fluid.
I plan to put all my TVRs onto it as and when I can!
Andy
I use it in a couple of my wedges for a trail and have no problems it works well, the cars heat up as normal, they just don't boil. Its strange being able to remove the filler cap with the engne up to working temp and not being covered with hot liquid!
O! The heater works well.
For those of you who have to occasionaly top up you water system, well you have a problem, leak etc, so your system can't be working proberly. fix that and then fit Evans and you should not have a problem. The person who says it doesn't mix. This is true but if you drain the system and use the Evans cleaning mixture, that removes any water in the system plus a lot of the muck in your system, before you fill the Evans fluid.
I plan to put all my TVRs onto it as and when I can!
Andy
Edited by Mr Tank on Wednesday 13th March 16:09
:ducks for cover smilie:
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