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13. Spun up to 6,121 rpm, the MagnaCharger pumped out 11.3 psi of boost, which resulted in 678.9 hp and 582.5 lb-ft. The LSX really seemed to like the increase in boost, but we were beginning to max out our 41 lb-hr fuel injectors by forcing 68 psi of fuel pressure to them. Amazingly, at 2,400 rpm, the LSX was already providing 600 lb-ft of torque. That’s big-block status right there.