Drive with peace of mind, knowing that your engine is operating safely when using the G4 KnockLink. The KnockLink will show the beginning detonation long before you hear it.

The G4 KnockLink is designed for both street and race use.

Typical causes of engine knock:
Engine knock is one of the most damaging effects in any engine. Detonation (knock) can destroy your engine in seconds. You need to know when knock occurs, instantly. If knock does occur, the KnockLink warns the driver with a high intensity red flash.

Knock can happen when there is:
Poor fuel quality
Incorrectly rated spark plugs
Engine cooling problems
Engine management problems

What is Knock?
Knock, also known as detonation or “pinging”, refers to the spontaneous combustion of an air/fuel mixture inside the combustion chamber.
The self calibrating, G4 KnockLink will flash to warn the driver of any knock present.

Knocking is induced by excessive pressure within the combustion chamber causing the air/fuel mixture to self detonate. Excessive combustion pressures can be a result of increased engine temperature, high boost pressure, elevated inlet air temperature, lean mixture or over advanced ignition timing.

Tuning for performance and efficiency brings an engine nearer to the point of detonation. To achieve the maximum output and efficiency, combustion pressures must be optimised to create the greatest force on the top of the piston (or side of rotor). This combustion pressure is controlled by ignition timing and mixture.

If the air/fuel charge detonates, a large pressure impulse is created vibrating the surrounding engine structure. The effects of the vibrations can cause cracked pistons, bent rods and damaged bearings. This gives the need to accurately detect engine knock.

The most common way of detecting engine knock is to bolt a piezoelectric vibration transducer (knock sensor) to the side of the engine block. The knock sensor behaves similarly to an audio microphone but converts vibrations rather than audio to an electric signal.

Why choose the KnockLink over other products on the market?
The KnockLink G4 is the only device on the market that requires no setup. Other systems require time consuming gain, frequency and noise settings to be adjusted. Without proper knock listening tools, this can prove difficult if not impossible. The KnockLink requires none of this, just wire in and start the engine.

Even light detonation will damage an engine over time. The G4 KnockLink's microprocessor continuously scans the knock signal and warns for any knock occurring. The engine's RPM and load is automatically 3D profiled by the KnockLink, continuously storing and dynamically adjusting this noise profile map while looking for the particular knock frequency.

The G4 KnockLink is the only self-calibrating ignition warning instrument on the market.

How does the new KnockLink G4 compare to the old?
The old KnockLink was admittedly crude in its operation, the displayed value was proportional to engine noise and knock could be seen as an addition to this. The new KnockLink uses advanced signal processing techniques to determine actual engine knock, normal engine noise is completely discarded.

The new KnockLink is housed in an anodized black aluminum enclosure, providing sleek looks along with high durability... steps ahead of the old KnockLink.

Features:
Intelligent self learning digital system.
High detection accuracy (>90%).*
No complicated calibration process.
High intensity red warning flash.
* based on feedback from professional engine tuners