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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
why dont 2 strokes use thermostats?
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[QUOTE="LJW, post: 230018, member: 26896"] The cap is a relief valve set to limit max pressure at ALL times. "In a cooling system, a higher pressure equates to a higher boiling point for the coolant. Higher coolant pressures also transfer heat from the cylinder heads more efficiently." " Higher coolant flow will ALWAYS result in higher heat transfer." Remember that the object of the game is to cool a lump of hot metal, not see how hot you can make the coolant. Use of pump speed alone is a poor way to control engine temperature. It has only one input, RPM. It's blind to important data points like engine load, coolant temp and ambient temp. This is just the condition tx246 outlined in his original post. Compromise like this is the work of accountants, not enginers! Tinkering with pump RPM or impeller configuration in a streetbike-turned- racebike is likely an attempt to fight pump cavitation, not get free hp. "If people suffering from heat exhaustion were revived in the same manner most people cool engines, they would be placed in a cold shower set at a trickle. Then the temperature of the water going down the drain would be monitored." All the stuff in quotes was shamelessly stolen from the Stewart Components website: [url]www.stewartcomponents.com/tech_info.htm[/url] Go there, read and think. If you have had the patience to get this far on this thread, a little more time spent reading FACTS can only help eliminate MYTHS. [/QUOTE]
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Dirt Bike Mods & Maintenance
why dont 2 strokes use thermostats?
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