VNT and rpm

[rodpaslow]

That's the plan.  Mine will be a cable setup.  I think the VNT I bought was off a 2000 MK4 car.  Looks like it hasn't seen a whole lot of use and the control is nice at loose for the vanes at the moment.  I assuming its a 15 as it was off a jetta Mk4.  I don't know what it came with, but I'm assuming if it worked on a 1.9 tdi it will more than do on a 1.6.  It is 1 piece manifold and turbo and will bolt right up to a 1.6 head; no problem.

[blackbird82]

cool man. what will control your cable?

[R.O.R-2.0]

I've a mk5 golf turbo - that bolts up just fine.

If the bolt holes are in line vertically it fits - if diagonal it doesn't!

is the wastegate your only means of controlling your VNT? as in, hooked up so that it directly operates the vanes?

thats bad because at idle, and at light load conditions, the vanes will be closed. and it will make more back pressure while driving down the road..

But is it really? You see, I thought this was the case when I spent months researching my controller and designing it to have open vanes at idle - but since building it I have conflicting opinions, including apparently the men who design Audis. they idle with the vanes closed.

im not worried about idling with the vanes open. im worrying about going down the road with the vanes closed, and making WAY too much back pressure..

and yes, the VNTs bolt right up. they have the manifold cast as 1 piece with the turbo.. i welded the EGR port shut and trimmed the top ear a little. and i used a mk2 gasser intake manifold with the bottom of runner #3 modified..

[Alcaid]

some tell me i have a VNT15, some tell me its a 17..

its a GT1749v.. ive read that the ALH came with a 1549, and a 1749..

either way, i know i have a VNT, and it makes LOADS of boost.

original poster should have a VNT17 also, since he has the 110hp engine.

If it's from an AFN you have the VNT15...

GT1544 or K03, wastegate turbos used on 1Z and AHU 90hp non-VNT TDI engines
GT1749V aka. VNT15 used on the 90 and 110hp VNT TDI engines
GT1749VA aka. VNT17 used on the 130hp TDI engines
GT1749VB used on the 150hk TDI engines

[R.O.R-2.0]

some tell me i have a VNT15, some tell me its a 17..

its a GT1749v.. ive read that the ALH came with a 1549, and a 1749..

either way, i know i have a VNT, and it makes LOADS of boost.

original poster should have a VNT17 also, since he has the 110hp engine.

If it's from an AFN you have the VNT15...

GT1544 or K03, wastegate turbos used on 1Z and AHU 90hp non-VNT TDI engines
GT1749V aka. VNT15 used on the 90 and 110hp VNT TDI engines
GT1749VA aka. VNT17 used on the 130hp TDI engines
GT1749VB used on the 150hk TDI engines

that about makes no sense whatsoever..

i trust you are right, but the way things are named, makes no sense..

my turbo is off an 01 ALH..

[Alcaid]

ALH = VNT15 (GT1749V)

VNT15 is just a nickname you yanks have given the GT1749V to distinguish it from the the bigger GT1759VA (VNT17)

[R.O.R-2.0]

'Mericans do lots of shizz that dont make sense!

[rodpaslow]

Cable control I plan on having the throttle cable connected opposite to the throttle cable, as you step on the go pedal, the cable will be pulled closing the vanes, a vacuum boost can will control in the opposite direction. - just like  "dual spring set up so that at light load, they open easily so you have the least restriction when cruising on the highway. and a second harder spring that opens them up progressively when you are pouring the coal on.  So that they don't open up too fast in the upper boost ranges."

All the cable setup has to have in addition is a stop plate so once the vanes are closed (or as closed as you want them) the boost can is against the stop so once boost pressure is reached it has something to push against to open the vanes.

[blackbird82]

Cool man that will work, just as long as the boost can that opens the vanes after the cable shuts em with throttle input is set low to start, if you have vanes closed for too long its and engine brake!

[R.O.R-2.0]

Cable control I plan on having the throttle cable connected opposite to the throttle cable, as you step on the go pedal, the cable will be pulled closing the vanes, a vacuum boost can will control in the opposite direction. - just like  "dual spring set up so that at light load, they open easily so you have the least restriction when cruising on the highway. and a second harder spring that opens them up progressively when you are pouring the coal on.  So that they don't open up too fast in the upper boost ranges."

All the cable setup has to have in addition is a stop plate so once the vanes are closed (or as closed as you want them) the boost can is against the stop so once boost pressure is reached it has something to push against to open the vanes.

search for andrews (Libbybapa) VNT control mechanism.. its very much like what you are describing..

[ibizz]

and others

there some youtube videos , vnt operated that way


what i dont understend theres 2 types of vnt ?

1 with exaust manifold and turbo build in  piece
and there ones like mine turbo unit only , separated exaust manifold

mine says in flat area vnt 15

[fatmobile]

Besides the Garret VNT turbos;
 VW also used a KP 39 and KP 49,.. KKK products,
 that bolt right to a 1.6 as well.
 I think the KP 39 is something close to what americans would call a VNT 16.

 It also has some feedback to let you know where the vanes are sitting.
 Since these turbos were sometimes sticky, because they are moving all those vanes.
 A certain vacuum might not put the vanes where they are supposed to be,.. so feedback to the computer was needed.
 This could probably be used to make some colored lights change on your dash,.. or a gauge move.

 I'm really looking forward to being able to push a knob on the dash to adjust boost and see what happens as far as fuel mileage on the highway,..
 searching for optimum.

[blackbird82]

I am of an idea that ideal mileage will be a balance of just enough boost to rid smoke, and a turbo that can do it while flowin exhaust fairly unrestricted with almost open vanes.  at 3000 rpm, these engines should have enough exhaust velocity to achieve it.

Dammit! I was supposed to keep doin reno's on the home. Now I am turbo shoppin.