Land Rover TD5 VNT Conversions

Td5 Variable Geometry Turbo Conversion is the world’s first bolt on Variable Geometry Turbo conversion for all Td5 powered Land Rovers.
So what’s special about a Variable Geometry Turbo? All turbos are a method of forced induction – i.e. forcing a greater mass of air into an engine.  A conventional turbo consists of two main parts – a turbine (driven by the exhaust gas from the engine) and a compressor wheel (driven from the turbine wheel via shaft).
A turbocharger needs to be exactly matched to an engine to ensure it works correctly. In simple terms, if the turbo is too big, you will get turbo lag due to the time taken for the exhaust gas to spin the turbine wheel fast enough to produce useable ‘boosted’ pressure.
If the turbo used is too small, then it will be spinning too fast (thus damaging the turbo due to over-speeding) and it will also ‘throttle’ the engine as it will not be able to supply the volume of air required. However at low speeds you will have next to no turbo lag.
As is often the case, turbo selection is always a compromise – you want a big turbo so you will be able to compress more air – thus get more power, but at the same time, if you go too big, you will induce turbo lag. But then if you go too small, you will restrict engine performance.
A Variable Geometry Turbo is basically a turbo that can adjust itself internally. So now you have the turbine wheel, the compressor wheel, and a set of vanes that direct gas flow around the turbine wheel.  At low engine speeds (when the engine will be exhausting less gas) a Variable Geometry Turbo acts like a small turbo, so makes full use of the lower volume and lower speed of the gas being ‘exhausted’ by the engine. This means you make full turbo boost pressure at much lower engine RPM – which, when matched with correct fuelling – dramatically changes you low speed torque, and ultimately how your Land Rover drives at low speeds.
As engine speed (and load) increases, the turbo adjusts its internal vanes to slow the speed of the turbine wheel down, but at the same time ensuring that it still spins fast enough to ensure the compressor does its job (i.e. making the required boost pressure). By doing this it ensures that the turbine does not over-speed.
Our Variable Geometry Turbo conversion doesn’t just make a difference at low speed though, a Variable Geometry Turbo ensures that the turbo is always working at its optimum setting regardless of load/engine speed (RPM) – this means that turbo lag becomes none existent. You put your foot down, and instantly you will feel the effects!! This can never be obtained with a standard Fixed Geometry Turbo.

This turbo kit is priced at only £700 + VAT including all the required gaskets/seals.  This is based on an exchange for your old standard Td5 Turbo. A £75 surcharge will be charged until we receive your old turbo, which must be complete and in working order.

Please contact us for full details.

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