So far in the build of this neglected 5.7L Hemi, we got the engine running to establish a baseline of 376 hp and 414 lb-ft. Next, we changed the cam and springs, and on Westech’s Superflow engine dyno, we saw power jump to 434 hp and 440 lb-ft. After that, we experimented with different header designs, settling on a set of Hooker 1⅞-inch long-tube headers with 3-inch collectors, which bumped the power up to 442 hp at 6,200 rpm and just slightly reduced torque output to 437 lb-ft at 4,500 rpm.
Now, we turn our attention to the induction side. The intake and exhaust are often thought of as independent entities, but the reality is they not only have much in common, but they are also interdependent.
As we…