Some time ago I decided to upgrade my turbo. I had quite clear vision of the choice - GTB2056VK from current 210HP 159s and Breras.
I spent few weeks by searching some reliable local supplier capable to deliver 159's GTB2056VK turbo and another week and half waiting for the delivery. Then at the day D, I opened the shipment and spotted shiny new 200HP 159s BorgWarner/3K BV50 turbo. I gave my supplier call and as no other supplier was capable to deliver GTB2056VK and the currrent one gave me quite pretty discount for his mistake, I decided to keep it and give a try.
So here it is. Externally is this BW/3K turbo completely the same as Garrett's GTB2056VK. So you can use this guide for GTB upgrade as well.
From the pictures it's quite clear that adopting will require a lot of work, at least due to complete different compressor housing.
Starting with exhaust manifold flange
Porting exhaust manifold is the easier part. Although the stock turbo has rectangular flange with oval hole and BW squared with circular hole, the flange width is the same, so it's only about to make the screw holes slotted. Few hours of filling (both turbo and manifold screw holes) ...
... and turbo perfectly fits the exhaust manifold
will be continued ...
I spent few weeks by searching some reliable local supplier capable to deliver 159's GTB2056VK turbo and another week and half waiting for the delivery. Then at the day D, I opened the shipment and spotted shiny new 200HP 159s BorgWarner/3K BV50 turbo. I gave my supplier call and as no other supplier was capable to deliver GTB2056VK and the currrent one gave me quite pretty discount for his mistake, I decided to keep it and give a try.
So here it is. Externally is this BW/3K turbo completely the same as Garrett's GTB2056VK. So you can use this guide for GTB upgrade as well.




From the pictures it's quite clear that adopting will require a lot of work, at least due to complete different compressor housing.
Starting with exhaust manifold flange
Porting exhaust manifold is the easier part. Although the stock turbo has rectangular flange with oval hole and BW squared with circular hole, the flange width is the same, so it's only about to make the screw holes slotted. Few hours of filling (both turbo and manifold screw holes) ...

... and turbo perfectly fits the exhaust manifold

will be continued ...