A couple of weeks before Christmas the turbo on my Diesel Land Rover Sh!t itself. A bit of a curse really as I didn't need the headache of having to mess with my daily driver.
I probably should have just replaced the turbo with another stock one but I'm incapable of not tweaking something when I pull the spanners out.
So I could have bought a new standard turbo for about $1500 but I decided to spend a little more and get something better. What I bought was a Variable Nozzle Turbo. These are a newer technology turbo that uses a ring of vanes around the exhaust turbine to change the angle the exhaust flow hits the turbine wheel. Rather than use a waste gate to bleed off exhaust pressure and slow the turbine wheel it actively control its speed with the vanes.
The upshot of this is you can have a larger turbo that still flows OK at higher RPM but it can adjust the vanes and spin the turbo up faster at lower RPM. The result is almost no lag and an increase right through the range.
Well I finally finished it today and took it for a drive. The low down pull and lack of lag is surprising.
I've still got to get the max boost set on the Dyno. I think it's over boosting a bit causing the ECU to limit fuel and back it off.
Here's a pic of the finished installation. I've also documented the whole job on a Land Rover forum I belong to if anyone is interested:
http://www.aulro.com/afvb/projects-t...o-upgrade.html
Now I can get back to working on the Cobra.
Cheers