Forced Induction Devices ,
Increasing boost pressure or increasing the size of the forced induction device is a relatively easy way to achieve the same effect as increasing engine displacement without having to modify the engine itself . Is you choose to combine this with mechanical tuning , you can achieve even better results . However it’s important to remember that forced induction increases stress to the engine much more than naturally aspirated engines , and measure must be taken to account for this . In a naturally aspirated engine , a High compression ratio is the key to powering up the engine , but in a engine that is supercharged or turbocharged , compression actually need to be lowered in order to prevent abnormal fuel combustion or damage to parts caused by the increased combustion . A lag in response is also an issue for turbocharge engines , and measure need to be taken so that the responsiveness of the engine is not critically affected .
Boost pressure is a figure indicating the volume of air a turbocharger takes in the compression it puts it under , and is expressed I units of kg/cm2, kPa or Psi . The higher this figure , the more power is gained . However , the move air is taken in , the more fuel is needed to mix with it , which means that the Ecu must be configured to add more fuel , and it may delivered to change or add fuel injectors so that fuel can be delivered I larger quantities . It is essential to reinforce the internals of the engine in order to cope with the stress caused by the increased combustion.
High – Flow Turbine
This is a turbo in which the size of the compressor wheel which compresses the air taken into the turbocharger is enlarged , greatly increasing airflow . A process know as “cutback” can be used to reduce inertia acting on the turbine wheel , thus allowing boost to be applied more quickly . This allows output to be increased with a minimum sacrifice of responsiveness .
Increasing Turbine Size
The involves replacing the regular turbocharger with a larger one , since the size of the turbocharger is what determines the limits of a turbine’s output . Although this delivers a marked increase in power , it has a disadvantage in that turning a larger turbine leads to a slower response of the engine . And you need to aware that unless you have a larger displacement engine generating a larger amount of exhaust , and / or a powerful enough engine , torque at low revs will be very low , and the turbocharger will only be effective at very high RPM , making the car extremely difficult to control.
The principle behind the supercharger is similar to that of the supercharger , essentially , it forces compressed air into the engine , giving it a boost in power . As with turbochargers , they can be bolted on to naturally aspirated engines , making them a relatively easy way to increase output . Because a supercharged does not cause a lag in accelerator response like turbochargers due to their mechanism , they are particularly useful on technical racetracks that require quick response .
The intercooler plays an important role is a turbocharged engine , serving to cool the air heated up by the compression of the turbocharger and improving the engine’s volumetric efficiency . Intercoolers are fitted standard even In many production vehicles , but increasing their size boots their effectiveness and enhances their cooling capability . However , compressed air takes too long to travel through an Intercooler that is too large , and starts to lose pressure , This can cause up to a 10-20% loss of boots pressure in same cases .