Excessive Motorsports LLC

4.6L / 5.4L 2V PI - NPI Nitrous Camshafts

Stage 1 and Stage 2 Nitrous only cams are designed for the stock plastic PI intake, stock valve springs, and up to a 150 shot. Stage 2.5 and larger Nitrous only cams are designed specifically for the Edelbrock intake and nitrous use up to about a 250-300 shot. Higher nitrous levels than this usually require more exhaust lobe advance (wider LSA) to blow down the cylinder more at a cost of some NA power. We can make the LSA wider for no additional cost if desired. The Edelbrock prefers a very early intake opening point, slightly tighter LSA, has a raised plenum that is not prone to fuel puddle, and allows the use of the popular Holley 4150 sized nitrous plate system when combined with our custom intake elbow. This is one place to be more conservative than normal when it comes to cam sizing.