Horsepower, Torque, and more...
The real magic of CSRV lies in the numbers; horsepower and torque to name a few. A stock 302ci 5.0L Ford small-block was chosen as a test engine to demonstrate the awesome characteristics of CSRV. The original, stock engine was dynoed at 260 hp and 249 lb-ft of torque. After the CSRV heads were installed, and with no other changes to the short block, the same engine churned out 475 hp and 454 lb-ft of torque! This is due to the reduction in frictional losses and improved airflow. Furthermore, the lack of valvetrain limitations allowed the engine to spin to 14,750 rpm. Since the lubrication system is not exposed to the pollution from the poppet valve design, the engine oil stays cleaner, longer. Other benefits of CSRV include reduced noise and a lower average operating temperature.
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Feasibility of Spherical Rotary Valves
If the power potential of CSRV wasn't enough, auto makers should be happy to learn the system is also cheap. There are substancially less components in a typical CSRV system than in a standard poppet valve cylinder head, and most, if not all, of those components can be stamped or cast. After production of the components, there is less work involved in assembling the cylinder heads. This could result in a significant cost savings to auto makers. Coates manufacturing facility has a number of test engines designed to show that the system can be easily adapted any engine, from harley davidson motorcycles to industrial engines. Whether CSRV makes its way to the engine compartments of new vehicles has yet to be seen, but its awesome potential makes us hope. Cross your fingers!
Saw that one quite a while back... it's still under development, though... and though it looks great, I'm afraid it'll be leapfrogged by the newer variable valve systems... they might have to develop newer prototypes just to keep up with the state of the art...
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i dont think VVT stuff will better that. you still have valves to deal with. i think rotary is the way to go for good power making. i think Mazda needs to make a 3 rotor RX car.
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Coates Spherical Rotary Valve System...
Linear Mode
