Libbydiesels mechanical VNT control. Where can I find it?

[BGA]

In the thread :Vanbcguy's M-TDI Build I found This: Comment by Libbydiesel
Re: Vanbcguy's M-TDI Build
« Reply #287 on: April 29, 2015, 07:48:49 pm »
On my mechanical control, if I am cruising and snap the pedal down, the vanes close until boost builds and the boost can opens them.

Where can I find a description/ pics of Andrews latest system?
I have found this old thread :  http://www.thesamba.com/vw/forum/viewtopic.php?t=480457&postdays=0&postorder=asc&start=20&sid=d1aa33c989b43a5642ce5694f3c0db7e

Andrew I have seached yr system för days, either pic´s are gone or you write: dont follow my old systems, my new system works better! Where can I find your latest system or is it proprietary?

I am also seaching Tintins and Vanbcguy's latest mechanical system and found some pic´s but no drawing how they actually work and no idea if it is the latest design.

[libbydiesel]

The pics at the end of that Samba thread are the most recent mechanical vane control that I've constructed.  I've been planning on assembling an electronic control like what vanbcguy used for my next system as I feel it would be advantageous to have the rpm input as well and adding a mechanical rpm input would be tricky. 

[vanbcguy]

Mine is electronic, not mechanical. Everything is on Github - https://github.com/vanbcguy/vntlda

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[Rock3tman]

....here's my 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 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

sorry I don't know how to post photos...
regards, Rock3tman

[motohead1]

Mine is electronic, not mechanical. Everything is on Github -

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I am trying to decide on how to control the turbo on a Mtdi setup and would like to control it like you have done here electronically I dont have a clue as to what i am looking at in that link besides the readme file.  vanbcguy can you elaborate on how you built that controller?

Libby have you gone to this method of vane control?  I ask as this is an old thread I dug up.

[vanbcguy]

Essentially if you aren't understanding what you see in the README this probably isn't the project for you. I do have a background in electronics plus computer programming and it was a massive learning experience for me.

You need to build your own circuit board - I do have a board design I made up but it hasn't been tested. You'd have to get a board fabricated, solder all the components on, sort out how you are going to get an accelerator input to the thing, etc yourself.

The software works for me with my particular turbo, engine and vehicle but it took me a looooong time to be able to say that. About a year of tuning and tweaking to get it somewhere that I was happy with. The behaviour of the turbo needs to be reflected in the software - like I have tuning to stop the boost spiking over the set point that really works for the specific sized turbo I'm using, it might not work as well with a vnt15 as it does with a gtb1756vk.

If you want to learn a lot about electronics, PID control and microcontrollers then I'm happy to answer the odd question. :-)

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[libbydiesel]

I feel much the same way about the mechanical control.  It took a considerable amount of time and several versions before I got it working well.  There was a lot of effort involved in getting the parts working together.  If the linked pics and descriptions aren't enough for you to really grok it then it probably isn't a project you want to undertake.