![](https://www.carref.com/cms_admin/images/turbo-engine-266x114.jpg)
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.
Weight reduction and lightening a car to increase performance.![](https://www.carref.com/cms_admin/images/carbon-fibre-bonnet-266x114.jpg)
Maximise your performance gains with strict weight reduction. "Weight reduction. Putting your car on a diet.." Lighter cars are quicker […]
Best cold air intake induction kits and performance impact![](https://www.carref.com/cms_admin/images/induction-kit-box-266x114.jpg)
Cold air intakes and induction kits and the effect on performance. "Suck it and see – induction kits." Improving the […]
Low ratio sport gearbox setup and selection.![](https://www.carref.com/cms_admin/images/race-gearbox-266x114.jpg)
Gearbox – Lower ratios give better acceleration times and lower fuel economy. Six or seven speed boxes are better matched to modern engines.
Most street applications are closer 1st and 2nd gear ratios for that off the line 0-60 boost or for the fast exec a lower 2nd and 3rd ratio give improved overtaking flexibility and 30 – 70 mph acceleration with a high 4th and 5th gear to give motorway fuel economy.