![]() In essence, the intake manifold’s runners are an extension of the cylinder head’s intake ports, and the cross-sectional area of the manifold’s runners determines the power potential of an intake. That’s because the most important, yet least interesting, aspect of manifold design is hood clearance.Īs with the location of the cylinder head’s intake ports in relation to the valves, a runner design with the highest, most direct approach into the intake ports will usually produce the most horsepower. Unlike cylinder head and camshaft dynamics, which most enthusiasts find quite fascinating, intake manifold design is very boring in comparison. Underhood installation constraints are the biggest obstacles to overcome during the R&D process of intake manifold design.Īt its core, the purpose of the intake manifold is to distribute air evenly to all eight intake ports. ![]() That’s because a manifold designed with airflow as the top priority would never fit under the hood of a car. Intake manifold design is always a compromise. You can copy and paste this link to share: SHARE THIS ARTICLE: Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. For a comprehensive guide on this entire subject you can visit this link: LEARN MORE ABOUT THIS BOOK HERE This Tech Tip is From the Full Book, HOW TO SUPERCHARGE & TURBOCHARGE GM LS-SERIES ENGINES. Realistically, that’s nearly impossible to achieve, so the goal when designing an intake manifold isn’t so much to improve airflow, but rather to minimize the loss in airflow the cylinder heads will experience once the intake manifold is bolted to them. In fact, the only way an engine can use all of the cfm potential the cylinder heads have to offer is if they’re bolted to an intake manifold that operates at 100-percent efficiency. As important as airflow through the cylinder heads is, it’s ultimately limited by the efficiency of the intake manifold. That being the case, the intake manifold can accurately be described as an engine’s nostrils. Cylinders heads are sometimes referred to as an engine’s lungs.
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