“VSI” is an abbreviation for “Vapour Sequential Injection”. Prins describe this alternative fuel system as the most advanced vapour injection system available on the market. The VSI system is also suitable for the latest generation Direct Injection engines (VSI-DI). With the VSI system there is no difference with driving on petrol.

We have fitted Prins LPG conversions to many Rams and also the new range of F-150 vehicles including the new Ecoboost vehicles which are a twin turbo Direct Injection system.

All installation work is carried out in accordance with UK LPG Code of Practice. We have a long standing relationship with Quest Motorsport who carry out our LPG conversions and servicing.

This VSI alternative fuel system is developed in close cooperation with Keihin Corp. of Japan, one of the world’s leading injector manufacturers and a name that stands for OEM quality and reliability.

The VSI system is fully integrated by way of a “master – slave” method with the vehicle ECU, making it (E)OBD compatible, therefore signal emulation is not required.

The key components of this alternative system are all of OEM quality and specially designed for LPG and CNG applications. All components comply with the strictest regulations and certifications. Prins installations are very neat due to the compact design of the components.

The especially dedicated Prins diagnostic software is unique and enables fine tuning the VSI system for optimal performance and emission reduction.

We have had many Rams converted to run on multi-fuel petrol/LPG. Around 20% of the new Rams we supply are supplied with a Prins LPG conversion. It is by no means necessary and everyone’s requirements differ. It depends on the type of use and mileage that will be done and of course upon how long you want to keep the vehicle.

A 122 litre Tank can be fitted underneath the vehicle (which gives around 100 litres of usable capacity) or alternatively for those looking for a larger range a 180 litre tank can be fitted in the pickup bed. Both sizes give a great range and you still have the petrol tank in reserve.

Please note we do not fit the Prins conversions in house, but we can facilitate the fitment by an authorised Prins installer so that it coincides with your vehicle being ready for collection. 

We are the first UK supplier to have had Prins LPG fitted to the new Ford Ecoboost engines. These are a direct injection unit and the system has been developed by Prins specifically for the F-150. It works by still injecting a tiny amount of petrol with the LPG.

It is by no means necessary and everyone’s requirements differ. It depends on the type of use and mileage that will be done and of course upon how long you want to keep the vehicle.

The same as the Rams a 122 litre Tank can be fitted underneath the vehicle (which gives around 100 litres of usable capacity) or alternatively for those looking for a larger range a 180 litre tank can be fitted in the pickup bed. Both sizes give a great range and you still have the petrol tank in reserve.

All other makes and models of vehicle can have an LPG conversion added including the Chevrolet and GMC range of trucks and SUVs. Where “valve care” is required – such as the Vortec range of engines – there is an additional system fitted that adds lubrication with the LPG.

We have a long standing relationship with Quest Motorsport who carry out all our LPG installation and LPG servicing work.

An LPG conversion can be added to new or used vehicles. Please contact us with any queries or for further details.