Under bonnet temperatures are one of the biggest performance killers around.
Quite simply, you want your engine to be sucking in cold air as this carries more oxygen and will allow you to burn more fuel.
The exhaust system is one of the contributors to under bonnet temperatures. You can therefore lag the exhaust to help prevent this heat soak into the engine bay.
Vents – adding performance with Bonnet vents.
Performance gains are possible with the addition of bonnet vents.
Warm air really does kill performance. This is due to the air intake temperatures being hot and air at high temperatures carries less oxygen.
When driving an engine hard the under bonnet temperatures quickly build up and the engine has no choice but to suck this air in reducing your power.
Diesel Tuning for maximum power and torque
From a diesel perspective, anything that isn’t turbocharged is a waste of time from a tuning point of view. Similarly, anything that isn’t using electronically managed direct injection is a pointless tuning proposal so we are somewhat limited to modern Turbo Diesels.
Get rid of those two ointment bound flies and things get more interesting
What is an induction kit and what does it do.
As induction kits are probably one of the most popular modifications for car tuning projects we thought we should add a introductory article to explain what they are, what they do and the theory behind them.
An induction kit is quite simply an air filter. Most cars have air filters mounted in an air box. These filters are generally constructed of paper which filters out the particles from the air and prevents these from getting into the engine. The airboxes are designed to reduce the noise of the engine and have various vanes and angles cut to maximise this noise reduction.













