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ProComp 438-NA vs. Turbo (12.8 psi)
This 438 stroker was powerful both in normally aspirated and turbocharged trim. Despite a static compression ratio of just 9.2:1, it produced 604 hp and 568 lb-ft of torque. In fact, torque production exceeded 510 lb-ft from 3,500 rpm to 6,200 rpm, making this one impressive street stroker. Adding boost with the 80mm turbo from Comp Turbo resulted in serious ponies. The combination topped the 1,000hp mark by posting peak numbers of 1,037 hp at 6,000 rpm and 957 lb-ft at 5,100 rpm. Torque production exceeded 900 lb-ft from 4,500 rpm to 6,000 rpm. The wastegate upgrade from Turbo Smart controlled the boost perfectly, and given the use of the air-to-air intercooler and CSU carburetor, we see no reason why this combination wouldn't run safely on pump gas.