There have been a few threads on Td5 turbo options in the past... and one thing that gets brought up quite often is the use of VNT (variable nozzle turbos) and the benefits they should bring. The down side is the need for a custom exhaust manifold, modified exhaust down pipe, modified oil pipes - and which turbo to use - making sure it's matched to the requirements and characteristics of the Td5 engine.
Until now that is....
Here are a couple of pictures of the first prototype -baring in mind that from the outset, this turbo has been designed for the Td5 :)
So it will bolt straight onto the standard exhaust manifold, it uses a standard exhaust downpipe and also the standard air intake pipe work - literally a bolt on conversion.
But more importantly... it is designed exclusively for the requirements and flow rates of the Td5 engine. It is not one off another vehicle modified to suit a Td5 - which may be far from ideal.
More details will follow (as still early days), but initial indications are looking promising. Even on a standard map (on an otherwise standard Defender), the turbo makes quite a difference. It makes more boost from much lower RPM, and the speed at which it makes boost when on the go is nothing but amazing!!!
http://www.bell-auto-services.co.uk/...fold-small.jpg
http://www.bell-auto-services.co.uk/VNT-vane-small.jpg
However....
When remapped to make use of the increased boost pressures at lower RPM.... that's when the fun begins!
Although still early days, and we have 'A LOT' more testing to do before the turbo and various 'map' options will be ready for sale.... all I can say is that it will be worth the wait!!!
In the mean time the company who are making the turbo, ian from IRB and myself at bell auto services have quite a bit more work to do!!!
More info soon :)
TD5 VNT conversion Spy Shots !!
