New Records Set with RR Racing’s Supercharged ISFs

RR Racing’s customers are making history setting new records with their RR625 supercharged ISFs. Jason Franz of California set a new 1/4 mile record run with 11.1 seconds at 128 mph on street tires. Clayton Miler hit 190 mph top speed at the Mohave Mile.
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New Ethanol Kit Increases Supercharged ISF Power

RR Racing is continually seeking to increase power of its supercharger kits.  We have been working hard on a new ethanol kit and tune.  We are happy to report that we were successful in increasing the power of our ISF Supercharger kit RR625 by 40 whp!

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