The centrifugal supercharger offered a number of desirable features, including billet aluminum construction, a proprietary ceramic bearing system, and coating of the internal components for temperature and wear control. The 305 was already off to a good start.īoost for the modified TPI 305 engine came courtesy of the gang at TorqStorm. Run with a Holley HP ECU, the modified LB9 305 produced 372 hp at 5,900 rpm and 353 lb-ft of torque at 5,000 rpm. The final mod was to replace the long-runner, factory TPI intake with a Holley Stealth Ram intake and 58mm throttle body. Compared to their stock iron counterparts, the Super 23 heads from TFS offered sizable flow gains and were capable of supporting nearly 500 hp on the right combination. Designed specifically for the small-bore size, the Super 23 heads featured 175cc intake ports, a 1.94/1.50 valve package, and 56cc combustion chambers. The cam was teamed with a set of Trick Flow Specialties (TFS) Super 23 175 aluminum cylinder heads. The cam offered a 0.570/0.565-inch lift split, a 218/224-degree duration split, and 113-degree LSA. ![]() Prior to the pressurization, the small-block was treated to some performance mods: a performance cam, aluminum heads, and a much-improved induction system. ![]() To illustrate the potential of a boosted 305, we took an original LB9 TPI 305 small-block and added positive pressure from a TorqStorm supercharger.
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