Maruha low temp thermostat

[sailaholic]

There was a lot of noise on the net about removing your thermostat will kill your engine because the water circulates too fast and overheats.

You mean overcool and increases engine wear.

with no thermostat, the car will operate at about 60 degrees when moving. and go up to 90 when stationary.

No I mean what I typed. As per rs2000 comment some people believe the water circulates too fast to carry the heart away.

I don't agree with the idea, just that there was mass hysteria about it.

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[davekmoore]

Would that be love that travels so quickly it takes the heart away?

[project.r.racing]

There was a lot of noise on the net about removing your thermostat will kill your engine because the water circulates too fast and overheats.

You mean overcool and increases engine wear.

with no thermostat, the car will operate at about 60 degrees when moving. and go up to 90 when stationary.

No I mean what I typed. As per rs2000 comment some people believe the water circulates too fast to carry the heart away.

I don't agree with the idea, just that there was mass hysteria about it.

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well their beliefs are incorrect. clearly they have never dríven with a stuck open thermstat or no thermostat at all. nil experience on their behalfs.

but if they are suggesting that the water circulates through the engine too fast, hence not taking some heat away with it, then maybe they have a point. as the ability to thermal transfer is reduced. but i've never seen data on that. as in measure block temp with normal operating cooling system, then measure block temp again without normal operating cooling system (ie removed thermostat).

in the end, racing cars dont run one, and they seem not to have an issue. but then they ain't worried about fuel consumption and engine wear as much as we are.

they might have a restrictor plate in place of the thermostat, and control flow depending on the diameter hole that is in the plate.

same idea as a turbo restrictor in some classes of motorsports to control power.

[sailaholic]

Yeah I agree. Sure water circulating faster will pick up less heat per gram of water but you will also have many gram more flowing through in the same space of time.

A restrictor plate for flow control to ensure correctly coolant paths may be possible.


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[track_addict]

will mix up a stronger coolant mix than normal

Sometimes conventional wisdom for a road car is not the best for a track car. Nearly every coolant sold here is ethylene glycol. Ethylene glycol protects the engine against corrosion, lowers the freezing temperature and raises the boiling temperature. These are all good things for the daily driver and a strong mix is even better because then it will survive a few years of dilution by topping up with water without sacrificing the corrosion and freezing properties.

Unfortunately ethylene glycol also has lower thermal conductivity than water and is less dense than water. This means it does not absorb heat from the hot spots in the engine as well as water does, nor does it have the same mass to hold the heat as it carries it away and then it does not transfer the heat to the fins of the radiator for cooling as well as water. Basically ethylene glycol is a poorer performer than water under the stress of track days.

The general idea for track cars is to use as little additive as you can get away with. If you compete at Winton or Goulburn then you must have some antifreeze (count on -10 for safety) if you stay overnight. Otherwise if you're frost free then you need just enough glycol to protect against corrosion, or else you can use a performance improver like Redline Water Wetter with little or no glycol.

Great info manga_blue. Thank you very much for that! Ill mix up the minimum recommendation on the concerntrate bottle (33%) in this case. Since the car is more of a road car that goes to the track I think its best to have a reasonable amount of anti freeze. I'm also going to get a higher pressure radiator cap (1.3bar). It's cheap and can only help.

Will report back when I have some results.

[manga_blue]

No problem. This might help too

Things you should know about coolant

[Snowmotion]

Excellent article.

[project.r.racing]

Reading that article make me think that 90% of australia doesn't need coolent in their cars.

[manga_blue]

Almost. More like 75%.