The R&D C4 Monster Compressor Wheel delivers a 3.5-3.75 pound per minute airflow gain (approximately 35 horsepower at sea level). The C4 Monster Wheel Kit will work best in 3000 ft. plus elevation situations (such as Denver, Colo.) or high heat conditions (above 100 degrees) with the OEM intercooler. For sea level use with rpms over 8100 and the C4 Monster Wheel Kit, R&D suggests that the X or aftermarket intercooler kits be used as high boost pressures and high air volumes can dead head into the OEM. intercooler causing compressor surge. For closed course or endurance racing use using the Rotax racing ECU where rpms are between 8250 and 8500, R&D recommends the use of the X model or aftermarket intercooler system. Tests have proven the OEM intercooler to have restrictions at 23.5 pounds of air, or 9.5 pounds of boost at sea level and 60-80 degrees. Air density is greatly influenced by heat and altitude combinations. In conditions where the air becomes less dense, power will be lost. R&D offers a range of compressor wheels that will allow the engine tuner to compensate for air density losses with a range of compressor wheels with increased blade tip height and increased inducer sizes, all with increased air flow volumes rated in pounds per minute. Trust the Pros at R&D to boost up your airflow volume, after all, its airflow volume gains that increase horsepower.
