All WSRD XR42 Performance Packages require the 2018+ Turbo R/Turbo RR Fuel Pump Assembly and fuel pressure mod shown below. Please review this video before purchasing.
When it comes to ball bearing Xona Rotor Turbochargers, the XR42 is the little brother to the XR54 that is ready to pack a punch!
WSRD Tune | Fuel Octane | Boost - PSI | Crack Pressure |
WS220XR.91 | 91/93 Octane | 20 | - |
WS220XR.93 | 93 Octane | 22 | - |
WS280XR | 98+ Octane | 26 | - |
WS320XR | E85 | 32 | - |
WS360XR | E85 | 36 | - |
Stock Engine Power Production:
WSRD Tune | Fuel Octane | Hub HP | Crank HP |
WS220XR.91 | 91 Octane | 220 | 244 |
WS220XR.93 | 93 Octane | 258 | 286 |
WS280XR | 98+ Octane | 326 | 362 |
WS320XR | E85 | 343 | 381 |
WS360XR | E85 | 355 | 394 |
Please note: Crack pressure is pre-configured. The XR42 does not require a crack pressure adjustment for all fuel options. All E85 fuel options require a minimum rating of E70. Please use the supplied ethanol tester before us.