One of the best performance gains to be had is through forced induction. Adding forced induction to a NASP engine is one of the biggest power hikes you can have for the money.
We also look at the options for tuning up supercharged engines including the turbocharger and remote turbos.
The basic reason for forced induction (turbo or supercharger) is not to increase compression or the maximum pressure in an engine cylinder, it is to increase volumetric efficiency (the efficiency of the engine at drawing in air) although forced induction is the most effective method of upping compression.
In computer games we just tick a box, and within seconds our car is fully turbocharged and running much faster. In the real world things are very different.
We look at Anti lag systems in cars and how these keep the turbo spinning ready to provide boost from low RPM speeds. When you lift off the throttle the engine power cuts and the turbo starts to spool down.
From this low spool state there is a delay while the turbo spins up again before it can provide any useful boost. We discuss the advantages and disadvantages of ALS and look at alternative options.