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This tuning can help to complement the components you’ve selected for the entire car (camshaft, torque converter, transmission gear ratios, rear axle ratio, tire diameter, and so on). Header tuning can also have an effect on how the car works at a specific track.
When considering a header design, the following points need to be considered: 1) Header primary pipe diameter (also whether constant size or stepped pipes). 2) Primary pipe overall length.
Everyone offers search tools to select a set of headers for a specific application. This article provides a simplified, yet detailed explanation of what is important in proper header sizing.
The first steps in an exhaust header project, as in all projects, is to establish your baseline and your objectives. Basically, you need to answer the question, “Why do I want to build a new header?” Are you looking for more power on top, are you looking for a broader power band, etc…
The results screen displays dimensions for a single primary pipe or 2- and 3-step header designs. It provides recommended pipe diameters and lengths for the primary pipes and the collectors. It also displays the best and worst specifications so you can avoid them.
Don oversees the Pertronix brands of headers (JBA, Patriot, and Doug’s Headers), which are essentially designed for three different styles of exhaust applications. While factory cast-iron exhaust manifolds are designed for durability and ease of installation, a comparatively lightweight tube header is all about increasing torque and horsepower.
A tubular header is an exhaust manifold fabricated from tubular sections of a pipe with longer runners or primary tubes than a typical log style exhaust manifold. The most free-flowing design includes full radius mandrel bends. A header joins each exhaust port to its own primary runner.
Building headers from mandrel-bent stainless tubing using proper fabrication techniques is important, but proper header design is crucial. Last month, we considered 180 degree exhaust headers for V-8s.
Design your own header. If you want to try your own hand at header design, I have reduced down some of the math involved to these simple equations and tables that should get you in the...
Custom Mild and Stainless Headers. GPHeaders’ Custom Header Mockup Kit allows you to design a set of truly custom headers without the vehicle ever leaving your location. We supply our customers with mockup header flanges and collectors along with our adjustable aluminum mockup elbows (see img.