Exhaust design theory

Only lately have computer programs like . Header design can have an effect upon both. Inertial scavenging of gases begins as soon as the exhaust valve opens. Here, exhaust gases move past the valve and exit through the exhaust port into the header primary tube (and eventually working their way into the atmosphere).

The Basic Theory Behind the Relation Between Performance and Air Flow.

Analysis of the Exhaust System in an Average Car.

Methods on How to Improve Efficiency and Power.

Still, I hope this helps (or at least stokes the fire). Depending on their design and purpose, . As in many fields today, a significant gap has developed between theory and practice in exhaust system design. The theoretician often does not appreciate the relevant practical concerns associated with the design process, while the designer often has difficulty in properly interpreting theoretical for . Your exhaust system is designed to evacuate gases from the combustion chamber quickly and efficiently.

Little bit of theory about High performance and road car exhaust. However, the efficiency of combustion and engine pumping processes is profoundly influenced by the exhaust system. The first is the principle of wave return.

Also, terms like “back pressure” and the statement, “An engine needs back pressure to run properly! The desired port shapes are the same, and in fact the only extra thing we want to do is to keep the exhaust gasses as hot as possible for as long as possible to . If you recall, Hooker Headers and Reher-Morrison Racing Engines gave us an in -depth look at what the header primary tube does and how to tune it. Although the mode of function of an exhaust system is complex, it is not (as so often is believe even by many pro engine builders) a black art.

In fact, these types of modifications can cause exhaust problems to occur sooner in the rpm range.

It just so happens that to get the appropriate velocity, you have to squeeze . These design parameters (essentially listed by importance) are: 1. Two Tube Size Error (when selecting tube sizes). Collector Size (open exhaust ). This theory evolved into the X-pipe, which allowed both left and right portions of the exhaust system to share some common flow area and resulted in even greater gains in power with . Because the pressure waves in an exhaust system travel at the speed of soun we had to know the approximate temperature of the exhaust gases because sound waves move faster in hot air than in cold air. Meaning, it travels further in the same amount of . General Design Principles for an Automotive Muffler.

This paper discusses the general principles of muffler design and explains the main advantages of various styles of mufflers. Mufflers are installed within the exhaust system of most internal combustion engines, although the muffler is not designed to serve any primary exhaust function.

The muffler is engineered as an acoustic soundproofing device designed to reduce the loudness of the sound pressure created by the engine by way of acoustic . I wanted to introduce my readers to Jack Burns, and have him share some time- tested exhaust theory with you. Jack lives in a “header-centric” worl where optimal header design is paramount and everything else should be designed to work around the headers. Of course, this cannot be reality for all of us, . How Two-Stroke Expansion Chambers Work.

A two stroke 125cc engine with standard exhaust system can . There are CAD and 3d modeling programs that can help you do layout and visualize things.