| GTX4709R GEN II | Reference Data | Compressor | Turbine | ||||||
|---|---|---|---|---|---|---|---|---|
| Super Core PN | Replaces | Inducer | Exducer | Trim | A/R | Inducer | Exducer | Trim |
| 851285-5011S | NEW | 76mm | 109mm | 49 | 0.88 | 93mm | 84mm | 82 |
| 851285-5012S | NEW | 80mm | 109mm | 54 | 0.88 | 93mm | 84mm | 82 |
| Notes: | Turbine Kit PN | A/R | Inlet | Outlet | Wastegate | Divided | Trim | |
| Super Core and Turbine Kit Sold Separately | 761208-0009 | 0.96 | T6 | V-Band | Free Float | N | 82 | |
| 761208-0010 | 1.08 | T6 | V-Band | Free Float | N | 82 | ||
| 761208-0011 | 1.23 | T6 | V-Band | Free Float | N | 82 | ||
| 761208-0012 | 1.39 | T6 | V-Band | Free Float | N | 82 | ||
Gen II Compressor Wheel Dimensions and Aerodynamics
GTX4709R GTX5009R Available in 76mm and 80mm inducer diameters
- Comp exducer is now 109mm (+1mm vs Gen I)
- Gen II wheel produces 15% more air flow
- 39% lower inertia
GTX4720R 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
