Small skis with a carbide blade are used for hard ice surfaces but if snow covers the ice, larger skis shown on page 1 are used to keep steering control. The purple "boots" on the small ice skis pictured below are to protect the sharp carbide edges.
The engine in John Brown's ice racer is tuned to run at 8500 rpm, slightly higher than stock, but the wear on the parts is so severe that the engine is rebuilt after only six races.
The large exhaust pipe at the top of the photo is tuned to scavenge burnt fuel and increase power to 150 horsepower.
Click for a photo of Tyler Pederson at the Ice Race 2007