vnt's?

[rabbitman]

Only if you have a poorly designed system that is slow to react.

I was talking about if he didn't have a controller, just a cable connecting the vane lever to the go pedal.

[OM617]

Thats not a good way to handle control. Lots of moving parts exposed to the elements, it can still only limit boost to one setting and it gives a funky throttle feel.

[NintendoKD]

sooooo, I need an electronic controller?  I was under the rather destinct impression that the direct link is the best Idea especially with a modded pump where the pedal goes down the fuel goes up and at the same time boost enguages and more fuel is added via the LDA are the proportions incorrect? I do understand that that there are some finite adjustments that are going to have to be made, but that comes a bit later, this post is mostly about choosing the right VNT/s to use for what I want to achieve.  The vc has an EC unit already on it, but the IDI is inherently non-electronic, and I really don't want it to be more complicated than it already is.  The throttle is exactly the way that I want to feel it, I like to be able to feel my car and give her what she needs   I am also here for advice, from vnt owners, and I'll take all that I can get.

thanks guys, and keep it comin,

Kevin

[NintendoKD]

oh, and for the uninformed, I'm here for the BEST way, "whatever that means"  for performance and longevity, as well as dummy proof "I need that last one, I am a MARINE, remember folks "  if the best way is to use an electronic controller, then I guess I have some learning to do in that regard, and if the best is my way then I know I'm on the right track, but if there is another way that is better, I will change my plans to just that.  Not! wishy washy.

[Vincent Waldon]

If you search a bit here you should find numerous threads discussing/debating all the various ways to mechanically control a VNT.   

In particular, Andrew has published a couple of detailed mechanical controller construction threads.

[NintendoKD]

I have seen it, just having a tough time locating it, now that I know the author, it should be a cinch.  This is the way to go right Vince?  This thread has gotten me a bit befuddled

thanks,

Kevin

[NintendoKD]

"troll alert" ok, so I got a couple of mech vnt controller threads from here: but couldn't find Andrews writeup
http://www.vwdiesel.net/forum/index.php?topic=21424.0
http://www.vwdiesel.net/forum/index.php?topic=19398.0

correction, one of them appears to be Andrews, case of mistaken Identity, sorry Andrew, and thanks.  Anything else, more upto-date than that please let me know.

Thanks,

Kevin

[Vincent Waldon]

Those were the threads I was thinking of.  

In terms of which is "better", electronic or mechanical... well... they both have their charms.

At the the end of the day it kinda boils down to skill level.. I've yet to see an off-the-shelf generic electronic control that didn't require some pretty specialized hardware and software knowledge to construct and tune... mechanical controls are much more assessable to the average dude and if adjusted properly can deliver a very nice control function.

Right, Andrew??!!

[NintendoKD]

I don't honestly think that I truly understand Andrews design though, and will need some help collecting the parts and assembling it.  I understand the concept though "just look at my signature, LOL "  I still need advice on the best vnt combo to go with

thanks,

Kevin

P.S. Yes, I thought that the "Toll Alert" was a nice touch, no harm done though

[745 turbogreasel]

I'd say electronic undoubtedly provides;
the fastest response time
the most tuning options
self diagnostic capability
and more, but without a Holset or Garrett engineering team, Bosch, and the OEM's backing your play, you may just have to suffer with the rest of us.
So far i've seen one system which can override the CANBUS controller, but I don't think it works standalone.  I have a perfect working controller, I just can't tell it what to do

http://www.holset.co.uk/mainsite/files/3_1-magazines.php   check out edition 10

[NintendoKD]

good find, and a very good read, I especially liked the axially horizontal turbo idea, interesting way of thinking.

[NintendoKD]

what about one from a 98 afn code passat from the uk? which vnt is that?  I would like to know so I can buy it if it is what I am looking for.

[NintendoKD]

GRRRRRR!   Having a helluvah time finding a pd150 turbo, 1749vb right? I need the part no.s or something that I don't have because I can't find them by searching for pd 150, pd, gt1749vb, or anything else, maybe I found some, but the thing is I don't have the part no. so I cannot confirm.  I want to make sure I get the right one.  Perhaps I should go back to the drawing board on this one and search another way?  I don't want boost too early, even though I will have forged H-beam chromoly rods, but I don't want it too late, with modification, I can recombine these things many ways but I though I had something going here.  Any one help me here, I guess the search system is a bit different, because I have never had this hard of a time finding auto parts in the us ebay.  Can anyone give me a hand? I could buy a 1722 hybrid, but where is the fun in that?  and besides, after I buy the two turbos individually from someone in the UK "breakers/etc." I will save that much more money on my build, as my friend will assist me with the fabrication, and turbo rebuild.

thanks,

Kevin

[NintendoKD]

K, so I just tried to use 1.9 tdi as a search string, but I got so many results now I can't find or figure out which I need   any help would be awesome guys

Thanks,

Kevin

[NintendoKD]

I want to use the mech control that you have come up with, I like it.  I have been having issues wrapping my mind around it but now it is all ok.  I would like to know where you got the parts from as well as which boost can to use, my application will be a bit different becaus eof the amount of boost I will be using, as well as the turbo being used.

thanks,

Kevin