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Blow off valves and dump valves.
When the throttle is closed (when you lift off the accelerator) in a turbo driven engine there is a build up of pressure as forced air is still coming from the turbo. Lifting off the throttle is a lot like putting a plug in the sink – the flow through is stopped and water would just build up and overflow the sink.
The days of fiddling around in the engine bay with a spanner to make the car go faster are numbered.
Modern engine computers (ECU’s) take over many of the controls of all aspects of engine management from timing to fuelling and more.
This actually means you get better power, a cleaner burn and more reliable engine but it does not mean the end of tuning.
Limited slip diffs, which LSD is best for handling.
Slip diffs "Time for something DIFFrent" Every car has a slip diff but with a few tweaks you can totally […]
How to avoid engine knock and pinging
So what exactly is engine knock and how dangerous is it? What causes engine knock and how can it be avoided?
You may notice a knocking or rattling noise from your engine or a sudden loss of power under full throttle.
Immediately back off the throttle and only use low rpm engine speeds until you can get the engine investigated.
The chances are that you are suffering from a condition known as “engine knock”.
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