Aftermarket exhaust parts are intended to replace exhaust components installed in automobile, motorcycle, or other motorized plants to improve performance, visual attractiveness, or vehicle sound. In general, performance improvements are achieved by reducing the back pressure of the plant exhaust system. Often the side effects of free flowing exhaust systems are "different" sounds, higher noise levels, or both, that some people want. The parts of the aftermarket exhaust can also be a force enhancement with changes in the exhaust parts that look like the exhaust tip.
The purpose of the aftermarket components does not have to change the appearance, sound, or performance of the vehicle in question. While it is almost always the goal if aftermarket components replace a fully functional component, it is often when the stock or manufacturer's components are obsolete that the aftermarket components are more widely available or cheaper than the replacement or OEM factory.
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Header
Switching from the exhaust manifold to the header exhaust (also known as extractors in Australia) will optimize the exhaust gas flow speed and in turn increase the high-end power of the engine. This is done using individual pipes for each flue port which has a finer bend with a larger turn radius, decreased airflow resistance, and calculated pipe diameter to obtain a good scavenging effect for a specific engine capacity. The pipes then merge into the collector and then flow into the larger pipe (bottom pipe), just before the catalytic converter. With the same long header, as every exhaust valve in the engine head is opened and the exhaust gas is forced out, it passes through one of the header pipes and through to the bottom pipe, where the exhaust velocity leads to a little hollow in another header pipe. It has the effect of removing exhaust from the cylinder, which is beneficial for performance. In a performance engine, which has an overlap cam, the scavenging effect will draw air through from the intake manifold as well, further improving performance. Disposable header length can be set to perform best within a given RPM range. Stock exhaust manifolds are usually made of cast iron and can be restrictive. The header may or may not increase the dB level of the exhaust, depending on the original exhaust manifold being replaced and the engine. However, the pipes "ring" with the exhaust and increase the noise of underage. Headers can be coated with ceramics to reduce the heat radiated in the engine compartment, and to increase the temperature of the pipe that increases the exhaust gas speed.
Terminology:
- 4-2-1 Header where 4 pipes join into 2 which joins into 1 (tri y's). There is a difference of opinion about which cylinder in the activation sequence should be paired for the best effect. In V8, the pair tends to join the cylinder with the same firing interval, and this will differ between the left and right cylinder banks.
- 4-1 Header where 4 pipes are joined directly to 1
- Shorty header where the total length of the header is shorter, with the collector closer to the machine
- Same Length Header where each exhaust pipe has the same length from the waste port to the collector cup
Catalytic converter
A catalytic converter is required to reduce emissions but creates backpressure due to exhaust gas being forced through the catalyst, and therefore lowers the power of the high-end engine. Many modern catalytic converters produce only 1 to 3 psi of back pressure, although this restriction gets worse with use. Hi-flow catalytic converters can replace standard units to provide lower back pressure. Installing an aftermarket catalytic converter is limited by law in some countries, [1] with 'test pipes' directly on the available bolts to test whether congested catalytic converters cause problems, which can be easily replaced for on-road use or scheduled emissions. testing. [2] Performing a catalytic converter may not provide an electrical advantage unless a pipe is placed through the converter to provide a clear path for the flue gas.
Mid-pipe
The tubing section between the catalytic converter (s) and the rear exhaust on the car that has two parallel exhaust pipes. Mid-pipe performance often has perpendicular connecting pipes or combined pipes for a while. This is to equalize the pressure in both the exhaust pipe.
- H-Style Pipe where there is a perpendicular pipe, resembling the letter H
- X-Style Pipe or X-Pipe where the pipe throw while joining, resembles the letter X
Thermal Insulation
The exhaust gasses out a large amount of heat into the engine room, which can have a negative effect on engine performance by raising the temperature below the surface. As a result, high temperature insulation is used, more commonly known as a heat barrier, for heat exhaust management. Thermal-barrier ceramic coatings are specifically designed to reduce heat loss from engine exhaust system components including exhaust manifolds, turbocharger casing, exhaust headers, downpipes and tailpipes. When used under the hood, this has a positive effect of reducing the engine bay temperature, therefore reducing the intake temperature. As well as providing thermal protection, these coatings are also used to prevent physical degradation of composites due to friction processes. This is possible because when applied, the bonding ceramic material with the composite (not just sticking to the surface with paint), therefore forms a hard layer that is not easy to crack or peel.
Glasspacks
Glasspacks (commonly called cannons or hotdogs) use two tubes, one inside a hole, and one solid outer part. Among these tubes, there is sound insulation. This muffler lowers back pressure, but is relatively ineffective in reducing sound levels. Glasspack can be used to provide a deeper "hoarse" sound. The name muffler glasspack is quite often associated with the name CherryBomb, because this company has been making glasspack mufflers for more than 50 years. In the 1960s, these mufflers were often mounted on American muscle cars. The construction of this muffler is very easy, as it is simple enough to consist of two tubes of different diameters. Apart from the sound insulation between these tubes, the glasspack exhaust does not feature any other lethal sound elements or resonators. With time, the pitch changes the glasspack muffler and the sound becomes louder under the influence of temperature.
Chambered Raids
Mufflers are a series of concentric or eccentric pipes inside the expansion space cavity. These pipes allow the sound to travel into it and cause sound waves to bounce off the end of the closed and flat pipe. This reverses the direction of the sound waves that make them collide with the approaching sound waves and cancel each other. These designs are usually very free flowing but do not offer as much noise reduction as exhaust.
Resonator
The resonator is part of the exhaust pipe that extends to a larger diameter and allows sound waves to reflect the wall and cancel it. Resonators are mostly used to reduce wrinkles and popping. They do not generate much back pressure.
Many North American cars (and possibly cars in other parts of the world) made from the early to mid 1990s can have up to 3 different (but similar) exhaust components downstream of the catalytic converter (s). Each of these components can be called a resonator or muffler. Usually only the last component is the actual exhaust, and the other component is a resonator.
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Stock mufflers usually reflect sound waves from the back, front, and sides to cancel the sound. They also increase back pressure, but are very effective at reducing sound levels.
Exhaust piping
The pipe that connects all the individual components of the exhaust system is called the exhaust pipe. Contrary to popular belief, larger diameter exhaust pipes are not always better. If the pipe is too large, the scavenger effect will suffer at low rpm, resulting in loss of torque and drive. Running a pipe that is too large can also lower the car's ground clearance, increasing the risk of a damaged exhaust when the car moves above an uneven surface.
Construction
While it is common for stock or automotive exhaust systems manufactured from ordinary (and sometimes "aluminized") steels, some manufacturers (such as Chrysler) have used stainless steels for all exhaust systems (pipes, exhaust, resonators) from mid to high the late 1990s. The use of stainless steels has allowed the exhaust system to survive for most of the car's life. This is a considerable improvement considering that in some locations (such as the North American rust belt) it is very common for ordinary steel muffler components to fail after 3 years of service.
Maps Aftermarket exhaust parts
Performance
Free flowing exhaust systems can maximize peak horsepower by reducing or eliminating back pressure; This is usually done by creating a path as possible, using a consistent diameter throughout the system and remove obstacles such as catalytic converters and pre-catalytic converter or replace the muffler with less stringent (and usually harder). Despite the potential for improved performance by eliminating the catalytic converter and other emission control devices, it will often make the vehicle illegal for road use in many jurisdictions. Modifications other aftermarket bypassing the catalytic converter and/or muffler, such as pieces of exhaust power supply or cables that are activated - which open and reroute the flow of exhaust to bypass the restrictions in the system - can improve performance, although it is likely to be illegally in areas where damage to the device emissions banned , especially when placed in front of catalytic converter.
Benefits
- An increase in the peak of the horsepower machine can be achieved.
- Gas mileage can be upgraded in well-designed aftermarket systems.
- Aftermarket parts can be cost effective replacements for stock parts when OEM parts are unavailable (or more expensive).
- aftermarket parts are often available in a durable stainless steel, while many OEM exhaust components made of mild steel and has a limited life span.
Losses
- Deleting or bypassing a catalytic converter will violate emissions laws.
- A noticeable increase in hazardous smoke can occur (especially when the catalytic converter is removed or bypassed, and/or when the disposal outlet is diverted to the side of the car as with exit discharges).
- Engine sounds may be more visible to drivers and pedestrians, resulting in increased noise pollution.
- Sounds exhaust pronounced "buzzing" in the passenger compartment at a steady trip or driving on the highway.
- Some modifications may void the manufacturer's warranty.
See also
- Space expansion
- Exhaust system
- Tuned exhaust
- Leyland Motor Corp. v Armstrong Patents Co. - litigation involving the right to supply the aftermarket exhaust systems
External links
- The inside of the stock exhaust.
- The article discusses the validity of the manufacturer's warranty with the installation of an aftermarket exhaust in Europe.
References
Source of the article : Wikipedia
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