About the VNT

[UnderPSI]

Why does everyone orgasm over a VNT?

[745 turbogreasel]

Same reason everyone did for disc brakes when they came out.

[Smokey Eddy]

Same reason everyone did for disc brakes when they came out.

and TDI
x2

[tSoG-84bit]

Same reason everyone did for disc brakes when they came out.

because they're both round? 

[Toby]

Why does everyone orgasm over a VNT?

Because in theory they should be the best of both worlds. Act like a small turbo at low speed and flow like a big one at high demand. Are they better? Yes, in part because the variable nozzle requires no wastegate so they have less back pressure that a wastegated fixed nozzle turbo. Are the the best thing since sliced bread? Probably not or everybody would be using one. Are they incrementally better? Without a doubt.

[punkvideo81]

How hard/realistic/beneficial is it to replace the stock turbo on a 1.6td with a vnt? other mods I have already done to my 1.6td are: ic, giles pump, 2.25" exhaust. been thinking about the vnt

[theman53]

MKII requires a custom rear engine mount...all would require a stand alone computer to run them or something like what libbybapa did with his VNT vanagon to control vanes.

[fatmobile]

Same reason they put it on the TDI.
 It's better.
It's easy to install on a MK1.
Exhaust is even easier than the stock setup.
 It hangs down so there's room for a better intake,.. no fancy, high dollar intake needed to improve flow, a cheap gasser intake will do.
Plenty of power down low, no more waiting for 2000 RPM, and it still slips the clutch in 4th & 5th when pushing over 18psi. That's with a 1.5D, stock 190mm clutch.

[Rabbit on Roids]

Same reason they put it on the TDI.
 It's better.
It's easy to install on a MK1.
Exhaust is even easier than the stock setup.
 It hangs down so there's room for a better intake,.. no fancy, high dollar intake needed to improve flow, a cheap gasser intake will do.
Plenty of power down low, no more waiting for 2000 RPM, and it still slips the clutch in 4th & 5th when pushing over 18psi. That's with a 1.5D, stock 190mm clutch.

VNT LOVE!!!

im on my second VNT equipped engine, and i LOVE it. this one is a 1.6 n/a, just boosted. still even has a n/a pump on it. i honestly like the n/a pump better. spools the turbo faster it feels like..

[UnderPSI]

They are only better if they have the proper control on the vanes.

[UnderPSI]

Seems practically impossible to use a VNT to it's potential without computer control.

[rabbitman]

Seems practically impossible to use a VNT to it's potential without computer control.

This has been gone over lots of other times.........use the search.

[UnderPSI]

Wasn't a question, was stating the obvious.

[Vincent Waldon]

Wasn't a question, was stating the obvious.

Ah, but if you search you'll find numerous threads describing mechanical control systems that do a very very fine job of VNT control, with no electronics required.   

[UnderPSI]

I have seen them, seems that to take full advantage of what a VNT can do, electronics would be needed.