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Showing posts from February, 2017

A more efficient fan shroud

Volvo has developed and patented this idea for their over the road trucks, but there's no reason it can't work on smaller vehicles. The ring surrounding the fan is fixed to the engine block so the ring can be much closer to the fan blades and so i more efficient. Not obvious from the diagram is that the fan shroud is a flexible material, sealed to the radiator and the ring.

Preventing Over-heating and Corrosion In Your Car

For hotrod, sports cars and older cars, especially cars that are infrequently driven, overheating and corrosion are all too common problems.

Many people are surprised to learn that the traditional 50/50 mix of water and anti-freeze is not the most efficient way to cool your engines. Water alone is the most efficient medium, but there are two problems associated with water as the only coolant. First, water will freeze in the winter and usually cracks the engine block. Second, antifreeze includes corrosion inhibitors and water pump lubricant, both necessary for you cooling system.

Here's how to get around those problems.

Replace your drain petcock with a sacrificial zinc anode or have an appropriate-sized bung added to your radiator. These anodes are commonly used in marine engines and - surprise - the hot water heater in you house uses one. It's proven technology and you can buy them at boating supply stores or Amazon. Add a surfactant like Water Wetter, available at auto parts s…