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School of Automotive Machinists Field another 575hp LS3

The HOT ROD Engine Masters Challenge Is Brought to you By AMSOIL

With extensive experience and development time on the LS engine platform to their credit, the School of Automotive Machinists was eager to fill an additional available spot on the roster in our LS class. Some of the parts of the school's two entries were similar, including the MSD intake manifold and ignition components however the two LS entries couldn't have been more different. This engine featured a much larger PRC LS7-stye head with larger ports, valves, and increased cross sectional area. Working with the bigger head, the specifications on the camshaft were dialed back. The end result is less cam and more head to do the same job as the school's previous entry.

Through the course of the competition session, the engine performed flawlessly, as the disciplined SAM's team worked through the tuning process. Here their experience showed, with the Holley EFI quickly worked to a perfect tune. Despite the SAM's patriarch Judson Massingill's opinion that this engine would smoke the other combination on the drag strip, it proved not to have the sauce to win the event. Showing an impressive 578 peak horsepower at 6,800 rpm, the engine easily out-powered the other combination in raw power. With HOT ROD's 2015AMSOIL Engine Masters Challenge scoring system based on average power over the entire rpm range, this engine fell short of SAM's other entry—a small-head, big cam bolt-on LS effort effort, finishing in second place. SAM's definitely showed their capabilities with LS engines, sweeping the top two positions.

Engine Builder: Gideon Bailey
Engine Type: Chevrolet LS3
Claimed Displacement: 376 ci
Block: Factory Cast Aluminum
Compression Ratio: 11.5:1
Crankshaft: Chevrolet
Connecting Rods: Chevrolet
Pistons: Chevrolet
Rings: Chevrolet
Camshaft: Comp hydraulic-roller 230/236 duration
Cylinder Heads: PRC
Intake Manifold: MSD Atomic Air Force
Carburetor or EFI system: Holley EFI
Headers: ARH
AMSOIL Oil: 0W20
Average Peak Horsepower Over Three Pulls: 576
Average Peak Torque Over Three Pulls: 502 lb-ft