01-01-2015, 02:41 AM
(31-12-2014, 12:36 PM)Dum-Dum Wrote: Use the actuator arm and a manual boost controller.
Remember the standard VNT uses a vac actuator that at rest pushes the vanes fully open as a failsafe then pulls them shut to make boost when it wants it whereas your going to keep them shut at rest and push them open with boost to make less boost so your working it the opposite way but because one is a pull actuator and one is a push actuator you can just straight swap the boost actuator into where the vac actuator was, just trim and re tap the road and its 2 10mm nuts holding them on usually.
If you need to clock the turbo that is where it gets complicated as they have a pin to make sure they go together perfectly and even once you've removed that there is still only about 10 positions it can go together in because of the vane mechanism.
That all changes on GTB turbochargers anyway, can clock to whatever angle you want. The vane mechanism is contained within the centre cartridge rather than in the turbine housing.
