VNT and rpm

[trav1856]

pardon my ignorance, where does one find a VNT15? (and intake and exhaust mannifolds?) I looked on Garrett's site and they don't list a VNT15, they list a G15

[ibizz]

R.O.R-2.0

what do you think its the best way to control vnt ?

cable operation ?

[ibizz]

trav1856
in cars like seat ibiza gttdi 110 hp
golf 4 tdi 110

[trav1856]

trav1856
in cars like seat ibiza gttdi 110 hp
golf 4 tdi 110

are you sure that's not 110kW? which would be 150hp

[ibizz]

nop

my turbo is vnt 15 and come from a seat ibiza 6k gttdi 110 hp

i know that turbo are found in manny others cars

[R.O.R-2.0]

Right, against the stop, will make boost without being under load but not at idle.
Your's is a VNT-17, right? There is a big difference. I wouldn't run my VNT-15 with the vanes tied open.

 I agree 30 psi doesn't give me more power, actually feels like less power.
I'll be pulling the turbo, freeing up the vanes and working on a vane controller that can be manually adjusted like the cold start timing advance knob.
My last controller held the lever tight against the turbo,..
it's on a small arc,
it needs to pull away from the turbo to come off open or closed.
 The next controller won't push it against the turbo, might even pull it away some,.. then the boost does some more controlling like my current setup would if the boost line was connected.

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.

[R.O.R-2.0]

pardon my ignorance, where does one find a VNT15? (and intake and exhaust mannifolds?) I looked on Garrett's site and they don't list a VNT15, they list a G15

off any TDI thats 2000+

garrett calls them GT15vnt...

[carrizog60]

Im going to be running a VNT onmy 1.6td pretty soon .I plan on modifying a 1.8t wastegate actuator in place of the factory VNT actuator. That should give me proper operation of the viens while using a manual boost controller

no, it wont, its going to give you a turbo that is super restrictive off boost..

unless you know something about a 1.8T wastegate that we dont..

wastegate cans are a BAD IDEA when it comes to VNT operation..

why wastegate s are a bad idea?
i control my max boos with one on my gt2052v

[R.O.R-2.0]

Im going to be running a VNT onmy 1.6td pretty soon .I plan on modifying a 1.8t wastegate actuator in place of the factory VNT actuator. That should give me proper operation of the viens while using a manual boost controller

no, it wont, its going to give you a turbo that is super restrictive off boost..

unless you know something about a 1.8T wastegate that we dont..

wastegate cans are a BAD IDEA when it comes to VNT operation..

why wastegate s are a bad idea?
i control my max boos with one on my gt2052v

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..

if you had control where your vanes were open at idle, but then close when you mash the throttle, then open up again as boost comes on.. thats the more ideal way to control a VNT if you dont have the electronics to operate them..

[trav1856]

pardon my ignorance, where does one find a VNT15? (and intake and exhaust mannifolds?) I looked on Garrett's site and they don't list a VNT15, they list a G15

off any TDI thats 2000+

garrett calls them GT15vnt...

yeah but the intake and exhaust aren't going to bolt to a 1.6 are they?

[trav1856]

pardon my ignorance, where does one find a VNT15? (and intake and exhaust mannifolds?) I looked on Garrett's site and they don't list a VNT15, they list a G15

off any TDI thats 2000+

garrett calls them GT15vnt...

Would you use a gasser intake and fabricate a header? or find a jetta set? I dunno.

[Bugsy_malone 666]

pardon my ignorance, where does one find a VNT15? (and intake and exhaust mannifolds?) I looked on Garrett's site and they don't list a VNT15, they list a G15

off any TDI thats 2000+

garrett calls them GT15vnt...

yeah but the intake and exhaust aren't going to bolt to a 1.6 are they?

Pretty sure it will.

I have a 1.6 N/A and am using an inlet manifold off a mk4 TDi golf, I think the exhaust manifold should be the same fitment(8v engines, not sure if USA got a crossflow diesel at all, but in the Uk it was just a stock 8v like all the other earlier diesels). I think it was only when they got to 16v TDi's and the engines in the mk5 that stuff stops fitting.

[ibizz]

Im going to be running a VNT onmy 1.6td pretty soon .I plan on modifying a 1.8t wastegate actuator in place of the factory VNT actuator. That should give me proper operation of the viens while using a manual boost controller

no, it wont, its going to give you a turbo that is super restrictive off boost..

unless you know something about a 1.8T wastegate that we dont..

wastegate cans are a BAD IDEA when it comes to VNT operation..




my garret vnt says in flat area vnt 15  so i think is not the same turbo that you are talking ..

gt i think is fixed geometry ..


if i make trotle cable in conjuction with the pressure can , how the vanes open again in boost ? since the trothle cable as puxing them to close ? ani ideias

why wastegate s are a bad idea?
i control my max boos with one on my gt2052v

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..

if you had control where your vanes were open at idle, but then close when you mash the throttle, then open up again as boost comes on.. thats the more ideal way to control a VNT if you dont have the electronics to operate them..

[regcheeseman]

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.

[blackbird82]

idling with vanes closed isn't that terrible, all John Deere powertech four cylinders do that.

But if it was me hooking it up I'd use the boost signal as it is the most important load signal from the engine.

I'd set my turbo up so the vanes can never fully close (spring applied to close) so they are always a little open for safety, and then use the building of boost to open them up with a 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.

Once you figure out the spring combo. should be good.