STOCK LS3 (415 STROKER)
To establish a new baseline with the larger 415 stroker, we started once again by running the big-inch LS3 with the factory LS3 intake. Once again, the factory offering demonstrated its versatility by producing impressive power on a motor it was never designed for. Equipped with the factory LS3 intake and FAST 92mm throttle-body, the AFR-headed 415 Wiseco stroker produced 627 hp at 6,300 rpm and 568 lb-ft of torque at 5,300 rpm. You will notice these peak engine speeds nearly match the camonly 6.2L run with the stock manifold. As with all of the testing, we maximized the power output of each combination with optimum air/fuel and timing values. These power curves were to serve as the baseline for the other two intakes tested on the 415 stroker.