OK. Let me extend my question a little bit further then. We have 1 VNT17 and 1 VNT20 in our hands and we would like to build a hybrid VNT17/20 unit with them. Which parts we must use from which unit, for instance rotor of VNT17 and the main body of VNT20 etc. ? At which points we must pay attention during this process, Did someone from you make this application before?
Making a hybrid turbo isn`t something you just hammer together in your garage. It`s a specilist job that thats best left to the experts that know what they are doing and have the tools which by sounds of things you have niether not that i am trying to be rude. Basically you get a VNT17 body mill it out to take some VNT 20 parts. What parts depends on what type of turbo you are wanting to build. For instants you say you have a VNT17 and VNT20, basically that doesn`t mean a lot. There are lots of different VNT17 and VNT20 turbos on the market which have a mixture of different size compressor wheels and turbine wheels.
GT1549,1749
Extended back disc type 6 blades
Part number Wheel diameter mm (A) Inducer diameter mm (B) Tip height mm (C) Wheel bore diameter TRIM
434812-0001 49,00 32,90 3,00 5,00 45
702489-0002 49,00 34,70 3,00 5,00 50
706164-0003 49,00 34,70 3,50 5,00 50
436132-0003 49,00 34,70 3,70 5,00 50
433256-0001 49,00 34,70 4,80 5,00 50
436624-0001 49,00 36,30 3,70 5,00 55
436334-0002 49,00 36,30 4,00 5,00 55
703925-0002 49,00 36,30 4,10 5,00 55
436132-0002 49,00 36,30 4,20 5,00 55
436131-0010 49,00 36,75 4,70 6,00 56
436132-0001 49,00 37,80 4,10 5,00 60
436320-0001 49,00 37,80 4,20 5,00 60
706164-0001 49,00 37,80 4,30 5,00 60
433256-0003 49,00 38,00 5,20 5,00 60
GT1752,2052
Extended back disc type 6 blades
Part number Wheel diameter mm (A) Inducer diameter mm (B) Tip height mm (C) Wheel bore diameter TRIM
451584-0010 52,00 36,20 3,80 5,00 48
436131-0003 52,00 36,75 3,80 5,00 50
702492-0002 52,00 36,75 3,00 5,00 50
451584-0008 52,00 37,60 4,00 5,00 52
451584-0007 52,00 38,30 4,10 5,00 54
702492-0001 52,00 38,55 3,00 5,00 55
436131-0002 52,00 38,55 4,10 5,00 55
436131-0001 52,00 40,20 4,40 5,00 60
436322-0005 52,00 40,20 3,60 5,00 60
GT17V
9 blades
Part number Wheel diameter mm (Dg) Inducer diameter mm (Dp) Pilot diameter mm TRIM
434533-0007 43,00 35,50 5,00 68
434533-0002 43,00 35,80 5,00 69
434533-0006 43,00 36,60 5,00 72
GT17
9 blades
Part number Wheel diameter mm (Dg) Inducer diameter mm (Dp) Pilot diameter mm TRIM
706172-0001 44,00 35,40 5,00 65
434714-0007 44,00 35,80 5,00 66
434714-0009 44,00 37,10 5,00 71
704580-0001 44,00 39,50 5,00 81
GT15-25
Garrett GT15 compact turbocharger is designed for today's small displacement engines. Based on the well-know T2 design, The GT15 family is engineered to provide an economic perfomance boost for small displacement diesel and gasoline engines in passenger cars, light duty trucks and marine applications.
The GT15's application range is for 1.3 to 1.6 liter ( 60 - 80 bhp ) diesel engines and 1.0 to 1.4 liter (85 - 120 bhp ) gasiline engines. The compact packaging makes the GT family ideally suited for twin turbo applications on V-block engines. The GT25, at the high end of the range, can be configurated to match gasoline engines ratings up to 210 hp. The GT17, GT20 and GT22 fill in the flow ranges between the GT15 and GT25.
The Garrett VNT15 ( Now GT17V ) turbocharger is currently featured on the VW 1.9 TDI engine, among others.
Benefits
Compact design.
Large choice of turbine and compressor wheels for optimum match.
Improved fuel economy..
Lower emissions.
Features
High interchangeability of parts across product range.
Semis-floating journal bearings.
Swing-valve wastegate design.
Options
VNT turbine flow control.
Wastage.
Water-cooled or air-cooled bearing housing.
High-temperature capability..
If all of the above means nothing to you or even this simple chart below don`t even think about messing with making a hybrid turbo.
