Putting the Squeeze on

Putting the Squeeze on

The Importance of Compression Ratios and How to Measure Them: Since race pistons in domestic V-8 engines move up and down in excess of 100 times per second, replacing them is a normal part of a racer’s routine. NHRA Top Fuel and Funny car teams replace them after every race pass and every second qualifying pass. Pro Stock teams replace them after every 40 passes approximately, and weekend warriors replace them every 12 to 18 months, sooner if their engines are nitrous-assisted. Read the complete story as it appeared in Maximum Drive magazine’s 2015 Sept/Oct...
Testing a ProCharger bonnet against a Vortech enclosure

Testing a ProCharger bonnet against a Vortech enclosure

And How Changing Carburetor Boosters Gained Over 50HP. In Lamar Walden’s engine shop, the dynamometer hurtled around to 5,997 rpm and recorded 627.5 hp. The engine, a 383ci small-block Chevrolet, empowered a Vortech S-Trim supercharger that generated 10 pounds of boost and directed its charge through a ProCharger bonnet and Demon Carburetion’s new 750-cfm blow-through carburetor. Suddenly the test expanded from two contenders to four: bonnet against enclosure, down-leg boost venturii against annular. The results were startling. Read the complete story as it appeared in Drag Racer magazine’s 2013 November...