Fast LSXRT Intake Manifold Upgrade - Belittling The Competition - Tech

Matt went to work and performed his tuning magic (leaning out the tune), while Huzzy reached under and turned the adjustable wastegate actuator to equalize the boost to be the same as baseline boost (11 psi).

For the final pulls, the A/F was a perfect 11.5 to 11.7 and the boost held at 11 psi just like the baseline run. In all fairness, the boost was at times spiking to 14 psi (where it did 13 psi on the baseline) at peak torque (4,500 to 4,700 rpm). Still, boost was holding the same 11 psi as the baseline at 5,000 to 6,200 rpm where gains at the wheels averaged 30-50 hp (see the charts). Peak gains were 50 hp and 66 lb-ft of torque (baseline 558 hp, 633 lb-ft now 608 hp, 699 lb-ft). Wow, what an intake!