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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”. Read More...

How to tune a car engine for power or economy

Let’s take a look at ways to tune a car engine and what exactly we mean by engine tuning.

First up we have to accept that there are many different types of engines.

We can only cover generic theory in this article on how to tune a car and suggest if you want more specific advice you sign up to our car forums where our helpful and friendly members will assist you further. Read More...

Blow off valves, dump valves and screamer pipes

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. Read More...

Principles of porting an engine and big valve conversions

The inlet and outlet ports on the engine block are usually larger than those of the manifolds that connect to them.

This allows for scope in the manufacturing process to allow for mismatched alignment.

Generally the engine ports are larger in the upstream flow direction avoiding turbulance but power gains can be made by matching these up. Read More...

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