GTX5020R GEN II Turbocharger 80MM
Horsepower: 1075 - 2000
Displacement: 2.8L - 11.0L
Features
- GEN II COMPRESSOR WHEEL AERODYNAMICS
- 80MM COMPRESSOR INDUCER | 120MM COMPRESSOR EXDUCER
- 99MM TURBINE INDUCER | 91MM TURBINE EXDUCER
- 9% INCREASED COMPRESSOR FLOW
- LARGER .88 A/R COMPRESSOR HOUSING VOLUTE
- GTX5020R FEATURES A 120mm COMP EXDUCER ( + 2 mm) AND HAS 30% LOWER INERTIA COMPARED TO GTX5018R
- SUPERCORE AND TURBINE HOUSING SOLD SEPARATELY
- COMPATIBLE WITH GT AND GTX TURBINE HOUSINGS
- 80MM SUPERCORE PN: 851285-5019S

GTX5020R GEN II 80mm
Reference Data
GTX5020R GEN II | Compressor | Turbine | ||||||
---|---|---|---|---|---|---|---|---|
HP: 1075-2050 Disp: 2.8L-11.0L | Inducer | Exducer | Trim | A/R | Inducer | Exducer | Trim | |
Supercore | PN | |||||||
851285-5018S | 76mm | 120mm | 41 | 0.88 | 99mm | 91mm | 84 | |
851285-5019S | 80mm | 120mm | 45 | 0.88 | 99mm | 91mm | 84 | |
851285-5020S | 88mm | 120mm | 54 | 0.88 | 99mm | 91mm | 84 | |
Turbine Kits: GTX50 | PN | A/R | Inlet | Outlet | Wastegate | Divided | ||
Interchangeable with GT|GTX 5008 5009 5018 5020 Supercores |
761208-0030 | 0.96 | T6 | V-Band | Free Float | N | ||
761208-0031 | 1.08 | T6 | V-Band | Free Float | N | |||
761208-0032 | 1.23 | T6 | V-Band | Free Float | N | |||
761208-0033 | 1.39 | T6 | V-Band | Free Float | N |
GTX5020R GEN II 80mm
Compressor Map & Exhaust Flow Chart
Compressor Map

Exhaust Flow Chart

Gen II Compressor Wheel Dimensions and Aerodynamics
GTX5020R Available in 76mm, 80mm, and 88mm inducer diameters
- Comp exducer is now 120mm (+2mm vs Gen 1)
- Gen II wheel produces 9% more air flow
- 30% lower inertia
- Reduced inertia due to reduction of material in the hub and blades
- Roughly 20% lower mass
- Lower inertia helps make boost faster and increases overall turbo efficiency
- Increased flow has potential to make more power at same boost or same power at lower boost levels
Larger Comp Exducer on Gen II

.88 A/R Compressor Housing
Gen II features a larger .88 A/R (Gen I .69 A/R)
- This helps maximize the power capacity of the new compressor wheel.
- This is also the same compressor housing used on the GTX5533R (85mm and 88mm)
Larger Compressor Volute

.88 A/R Compressor Housing
Gen II features a larger .88 A/R compressor housing that will cause an increase in outline dimensions only on the cold side of the turbo.
- +6mm longer on the comp outlet Fig. A
- +10mm longer on the comp inlet Fig. B
- Comp outlet diameter 107mm (same)
- Not outline interchangeable with gen 1
Dimensional Compressor Measurements vs. Gen I

Additional Features
- Lightweight billet backplate
- (NEW) Backplate to compressor housing O-ring
- Speed sensor port compatible only with new flange style speed sensors: (pn 781328-0003 Street Kit | pn 781328-0004 Pro)
Compatible only with New G Series Speed Sensor
