MTDI VNT Control

[payday]

Good afternoon,

I'm Patrick from the Netherlands, my excuse if my English isn't verry good...

I'm building a, AFN M-TDI in my Caddy MK1.

I have a small problem running my VNT 15 turbo on this engine; i'm searching for a VNT controller.
Is it possible to make the VNT 'boost controlled' ?
I've seen a boost controlled turbo on a 2.8 AGK Engine!?

Is there anybody who can give me a good idea how to make my VNT work?


I hope you people understand my problem and can help me fix it

[Rock3tman]

There's two ways to do this: (1) electronic control, usually using boost pressure to move the vanes, and (2) a mechanical linkage to impart the boost pressure to move the vanes.   Here's my system using method (2).

This is a fully mechanical VNT vane control system that is entirely based on libbydiesel's design and fabrication from a few years ago (actually, he provided me my stock vacuum actuator modified to operate on boost pressure by flipping the internals.  He also selected a new spring with characteristics so that it linearly opens the vanes from closed to fully open at approximately 20 psi).  I built the rest.   Almost all parts are from McMaster-Carr.

Heim joints and threaded rod ends make it completely adjustable.   I built it stout so it doesn't bind or bend.  I had to change my AWIC location to a slightly more distant location, but still has no lag.

A short video and four photos of the system are on photobucket:
http://s1264.photobucket.com/user/Rock3tman/media/MVI_7211.mp4.html?o=1

http://i1264.photobucket.com/albums/jj492/Rock3tman/IMG_7209.jpg
http://i1264.photobucket.com/albums/jj492/Rock3tman/IMG_7208.jpg
http://i1264.photobucket.com/albums/jj492/Rock3tman/IMG_7207.jpg
http://i1264.photobucket.com/albums/jj492/Rock3tman/IMG_1444-1.jpg

regards, Rock3tman