The Evans LS1/LS6 high flow racing pump & pulley flyer

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Courtesy of Evans Cooling Systems, Inc.

Experience the Evans advantage with Evans LS series products. Evans LS series pumps and pulleys are available as well as high flow thermostats. The pumps have been designed to increase flow 20% more than the OEM style replacement pumps, and maintains equal flow to both cylinder banks at any engine RPM. Evans improved design includes an engineered impeller, a billet pulley hub, heavy duty roller bearing and ceramic shaft seal. The 8-vane scrolled impeller design reduces parasitic horsepower loss at high engine RPM. Evans has also applied this technology to the GEN III truck pump.

Evans small pulley is designed to work with the OEM crank pulley. This pulley design maximizes cooling capacity by increasing coolant flow on factory applications more effectively than stock pulley combinations. Evans large pulley increases performance when using an under-drive crank pulley. Evans small and large pulleys are blower belt compatible. Optimal pump RPM range is 2500 - 6500. Pump flow (gpm) is maximized at 5500 pump RPM. For sustained high engine RPM applications our suggested combination is Evans large pulley and a 25% under-drive crank pulley. The pulleys are anodized hard coated aluminum. Refer to LSI Pump RPM vs. Engine RPM chart (pg. 2) to compare pulley drive ratios.

Evans small pulley is designed to work with the OEM crank pulley. This pulley design maximizes cooling capacity by increasing coolant flow on factory applications more effectively than stock pulley combinations. Evans large pulley increases performance when using an under-drive crank pulley. Evans small and large pulleys are blower belt compatible. Optimal pump RPM range is 2500 - 6500. Pump flow (gpm) is maximized at 5500 pump RPM. For sustained high engine RPM applications our suggested combination is Evans large pulley and a 25% under-drive crank pulley. The pulleys are anodized hard coated aluminum. Refer to LSI Pump RPM vs. Engine RPM chart (pg. 2) to compare pulley drive ratios.

Evans also recommends the use of their modified thermostats, available in 160°F and 180°F temperature settings. The modified thermostat increases coolant flow by more than 50% over other after market thermostats. The increased coolant flow maximizes the cooling advantage of the Evans LS series pumps. Evans LSI thermostats can also be used on all OEM LSI pumps.

Pump, pulley and thermostat are assembled prior to shipping. Thermostats may be purchased separately.

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