Garrett GT2056V VNT heads up

Hi Guys,

I know some guys went the GT2056V VNT turbos on the 300tdi lnadys. I have experienced that quite a few have had their internals blow up, 8 months old.

These are OEM turbos which came with the Nissan Navara. I have pulled a few down to rebuild and have noticed that the compressor nut went south on them. I am still try figure out why, seems as though there is no locking compound on them, but have to investigate more.

Just letting you guys know in case you are looking at using the GT2056V as a turbo upgrade.
Here is a pic of the one I tore down today.

As a reference BTW, the lower CHRA is from the original 300tdi T250-4 turbo.

Is pressure/vacum controlled vanes or electronic?

Whatdo you need to do to fit 1 of these to a 300tdi?

lynall said:

Is pressure/vacum controlled vanes or electronic?

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Vacuum.

danny6801 said:

Whatdo you need to do to fit 1 of these to a 300tdi?

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HS 2.7 manifold from South america.

Barbados said:

HS 2.7 manifold from South america.

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Oh ok so not easy or cheaply then thanks.

danny6801 said:

Oh ok so not easy or cheaply then thanks.

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Honestly, making manifolds for the 200 or 300tdi is so easy for an intermediate welder. You can get the 4 head to manifold flanges water jet cut or CNC milled, turbo manifold flange T2/T3 purchased, Schedule 30 90deg elbows X 2, 2 Tees and 1 ft of pipe and it can be made relatively easy using a discarded head as a template. I never researched it, but you might find the head flanges already made for another car that will fit the landy.

I am surprised that guys are not making their manifolds, especially in the UK, AUS and NZ where stuff is easy to find and relatively cheap. Moving here has set me back quite a bit from fabricating due to unavailability of materials and extremely high cost of MIG welding supplies. Even getting pure Argon here for aluminum welding is next to impossible and 50 pounds of Co2 costs over 250 USD.

Check with local welder/fabricators or ask a mate who welds about making you a manifold for turbos like the GT2056V as an example. You will want to get the turbo first to verify the flange you will need and for physical clearance so that you can make the exhaust/turbo manifold.

danny6801 said:

Oh ok so not easy or cheaply then thanks.

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My mate here has one he made, he has a 300Tdi powered RRC, went to all the trouble to make it to suit the VVT ex Nissan or something, ended up going back the standard turbo set up, he was dissapointed with the results in performance enhancement, but all this stuff gives him something to do and keeps him out of the pub. So I won't call it a waste of time.

So there was no gains not much point unless he didn't have it set up correctly.

I did read some years back where a guy had done the same and the actual install didnt seem to hard, but he spent an age getting it to run right afterwards, it was a long read but interesting nevertheless.
Iirc he controlled the vgt with cable and other actuators and was always tweaking something.

Barbados said:

Hi Guys,

I know some guys went the GT2056V VNT turbos on the 300tdi lnadys. I have experienced that quite a few have had their internals blow up, 8 months old.

These are OEM turbos which came with the Nissan Navara. I have pulled a few down to rebuild and have noticed that the compressor nut went south on them. I am still try figure out why, seems as though there is no locking compound on them, but have to investigate more.

Just letting you guys know in case you are looking at using the GT2056V as a turbo upgrade.
Here is a pic of the one I tore down today.

Click to expand...

Interesting; thanks for sharing.

IME, Ni$$an have lost their way - the new vehicles seem to be less than good.

I've also personal experience of two N@v@r@'s that have fallen in half due to rotten chassis !! ( so not a fan then - go figure )

Tempted with a VNT - have a pal with one in a 300 deafener, and it goes like stink, and sounds rather cool - though I think that bit might get on my t*ts quite quickly

Has your frein

Disco1BFG said:

Interesting; thanks for sharing.

IME, Ni$$an have lost their way - the new vehicles seem to be less than good.

I've also personal experience of two N@v@r@'s that have fallen in half due to rotten chassis !! ( so not a fan then - go figure )

Tempted with a VNT - have a pal with one in a 300 deafener, and it goes like stink, and sounds rather cool - though I think that bit might get on my t*ts quite quickly

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Has your friend got a official vnt for a 300tdi.

danny6801 said:

Has your friend got a official vnt for a 300tdi.

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An official one ??? not sure what you mean ??? - It's an aftermarket thing, bought from a firm which advertises in LRO as I recall....

danny6801 said:

So there was no gains not much point unless he didn't have it set up correctly.

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The young fellow wh did this is currently a BMW master technician at a large dealership, he is not incompetent when it comes to engines.
He was doing this stuff over two years ago, I think long before I had seen anything about using the Nissan VVTURBO on a 300Tdi, he built the manifold and did a lovely job of the fabrication, fitted an Alisport larger intercooler, played about with a number of settings on the injection pump, 3.5" hi flow exhaust, and after much stuffing about decided that although the conversion gave a little extra, it lost power in other areas where he needed it, end result, a return to the good old reliable power of the original factory bits.
As I said, not a waste altogether, but it helped me decide what mods I was going to do.

Cant understand why a VNT would not perform great on the landy, especially when the HS 2.7 came with them. You have to tune the pump to suit and swap out the vacuum or actuator to a pressure activated one. It will take time to get it right but it will out perform the stock GT250-04

You cant do it blindly either, you will need a pyrometer with data logging the EGT, a programmable boost gauge with maxium boost warning and peak recall along with a digital caliper to do all the adjustments, all of which I have waiting to do mine.

Gazbo said:

the conversion gave a little extra, it lost power in other areas where he needed it.

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This is exactly what a VNT was designed to improve, boost across the RMP range...he had to be doing something wrong. If you look up what the meaning and operation of a VNT/VGT works, you will quickly learn that what the BMW tech is claiming is the opposite of the characteristics of the VNT he had.

More than likely, he did not tune the pump as it should or he had an undersized or over size turbo. There is math involved in choosing the right turbo for any application or upgrade...its not plug and play.

This guy did a good vid explaining the inherent characteristics of a VNT/VGT.
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and a great animation of how the vanes work to provide instant and continous boost accross the entire RMP band.

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For some reason I reckon a 90 vgt 200tdi auto would be a nice drive?

Barbados said:

Cant understand why a VNT would not perform great on the landy, especially when the HS 2.7 came with them. You have to tune the pump to suit and swap out the vacuum or actuator to a pressure activated one. It will take time to get it right but it will out perform the stock GT250-04

You cant do it blindly either, you will need a pyrometer with data logging the EGT, a programmable boost gauge with maxium boost warning and peak recall along with a digital caliper to do all the adjustments, all of which I have waiting to do mine.

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It's your money and time, by all means spend both as you wish, hope you find it all worh the cost and effort.