Holset HE221W turbocharger, 7 cm² turbine housing
The Holset HE221W has a 7 cm² turbine housing and an internal wastegate. Compressor wheel dimensions are 43.5 / 60 mm and turbine wheel dimensions are 53 / 45.7 mm. The supplier quotes a 175–300 hp power class, making it an option for builds in this size range.
- Supplied as a turbocharger assembly with a turbine housing.
- This version includes an internal wastegate.
- T25 manifold connection and 5-bolt outlet.
Technical specifications
| Compressor wheel dimensions | 43.5 / 60 mm |
|---|---|
| Turbine wheel dimensions | 53 / 45.7 mm |
| Turbine housing | 7 cm² |
| Manifold connection | T25 |
| Outlet | 5-bolt |
| Internal wastegate | Yes |
| Oil feed | M10 × 1.25 |
| Oil drain | T25, 38 mm bolt spacing |
| Quoted power class | 175–300 hp |
| Maximum speed | 175,000 rpm |
| Maximum quoted airflow | 0.30 kg/s, 39 lb/min |
| Maximum quoted pressure | 4.0 bar |
Installation considerations
This universal turbocharger requires adaptation to the build. Check available space, manifold and downpipe flanges and the oil line arrangement. Vehicle-specific bolt-on fitment is not specified.
The quoted power class is indicative. Pressure, flow and speed figures are supplier-stated maximum values, not a recommendation to operate at every limit simultaneously.
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