Vortex Exhaust Extractor Resinators: an amazing exhaust technology
Our engineers originally developed products specially adapted to increase power and torque for racing. Today we have adapted this technology for many more applications, in fact everywhere an internal combustion engine is used. There is no exhaust system that can matches the performance of the Vortex Exhaust. For an engine with 120bhp the Vortex can add between 12bhp and 20bhp, increasing your engine's efficiency by 10% plus. The Vortex Exhaust will give that gain even with a catalytic converter left in place. This very big difference, i.e. more than 10% gain rather than 1% or 2%, which sports exhausts give, is entirely due to the Vortex Exhaust reducing backpressure, which we explain below.
What happens in a vehicle’s exhaust system?
After fuel is ignited exhaust valves open and the piston pushes out hot exhaust gas. This exhaust gas is the by-product of the explosion in the piston chamber. After a few revolutions of the engine the hot gas that has been forced out of the engine is pulsed along the exhaust system and, at the same time, is slowed as it meets colder. Sound waves are also created and have to be silenced. Silencer baffles, describe further below, add obstacles to the path of the gas and slow the gas further. With the engine running more gas is being forced into the system behind it and it quickly builds up backpressure creating a negative force in the exhaust system. Backpressure exerts a force that acts against the motion of the engine and we have gas leakage back into the engine. The negative force acts against the pistons, and in turn acts against the revolution of the crankshaft. This is enough to result in a loss of 10% plus of the power. Backpressure will slow the engine down quite quickly if throttling is reduced, and acts as an engine brake.
Furthermore, when exhaust valves open waves of sound from multiple explosions are pulsed along the exhaust pipe. These sound waves travel at roughly 1600 feet per second and to avoid becoming a noise nuisance need to be muffled in some way. Various systems are used to absorb or break up sound waves. One is to use baffling in exhaust silencers, which causes sound waves to deflect off the baffled shapes and cancel themselves out through their collisions. However, this also stops gas molecules in their motion and creates more backpressure. Badly designed exhaust systems add to the problem. Another way to silence the exhaust is to use resonators that contain sheets of e-glass fibre to absorb sound waves. In one respect it is similar to baffled boxes because the sound is still cancelled out by fibres vibrating and deflecting waves haphazardly when hit which cancel the sound waves.
The gas in the exhaust system travels more than 5 times slower than the sound and this varies according to the revolutions per second of the engine (in a conventional exhaust). Its velocity is determined by the volume of gas per second produced by the engine and the volume of the exhaust pipe. The diameter of the exhaust pipe affects this, and that is why small engine vehicles have small diameter pipes and large engines have much bigger pipes.
What happens in a Vortex Exhaust?
With a vortex exhaust we do something quite different. The Vortex Exhaust Resonator creates a vacuum in the exhaust, which aspirates the gas along the down pipe from the exhaust manifold. It only needs a few revolutions of the engine for it to start functioning, ridding the engine of backpressure. The vortex comes from unique engineering which we use physics to create a vacuum in the exhaust system.
With a vortex exhaust? reducing backpressure your engine doesn’t suffer from heat retention within the cylinder head, exhaust manifold or headers as conventional exhausts do. In fact with a vortex exhaust? the manifold is a great deal cooler than with a conventional racing exhaust, i.e. on two identical petrol engine cars the one with a Vortex Exhaust was more than 100 degrees centigrade less at the exhaust manifold on tick over (approximately 25% less).
What happens if there is a turbocharger fitted to the exhaust?
A turbo gives significantly more power to the engine and more fuel economy than a normally aspirated engine. Turbochargers are powered by exhaust gas. They begin functioning when the gas velocity reaches the boost threshold, which is the point at which the gas flow in the exhaust is strong enough to force air into the engine. In conventional exhaust systems the lag can be 2000rpm before the turbocharger begins to work. Turbocharger technology has been challenged by backpressure throughout its development. Challenges have included sudden boost and non-linear rise of torque, which are not desirable. Because of this, turbo design has been forced to give a slower smoother boost by using variable geometry.
Refer to benefits
- Much More Power - Much More Torque - Massively Improved Performances of Turbochargers - Less Carbon Build-up - Prolongs Engine Longevity by better heat dissipation - Prolongs Engine Longevity by reducing stresses - 10%+ Fuel Savings - Lower Carbon Footprint
