Thinking about selling the Z

Chuck33079 · 02-13-2013, 07:41 AM

The 2008+ EJ257 will blow the cylinder 4 ringland if you touch pretty much anything other than the catback without a tune. Most of the failures are from guys slapping an intake and exhaust on the car and running it untuned. 2004-2007 WRXs and 2005-2007 STIs blew the cylinder 4 ringland due to the fact that there's a nasty lean spot in the factory tune where the ECU switches from closed to open loop fueling. The EJ205 in the 2002-2003 WRX had no problems running untuned with an exhaust. Those motors blew up because the owners put a manual boost controller on it. The MBC would allow full boost at part throttle, with the expected results. If you get a good tune on a Subaru it will be fine. The problem are the owners not realizing how bad the OEM tune is, and changing parts without getting a good tune.

02-13-2013, 07:41 AM	#34 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	The 2008+ EJ257 will blow the cylinder 4 ringland if you touch pretty much anything other than the catback without a tune. Most of the failures are from guys slapping an intake and exhaust on the car and running it untuned. 2004-2007 WRXs and 2005-2007 STIs blew the cylinder 4 ringland due to the fact that there's a nasty lean spot in the factory tune where the ECU switches from closed to open loop fueling. The EJ205 in the 2002-2003 WRX had no problems running untuned with an exhaust. Those motors blew up because the owners put a manual boost controller on it. The MBC would allow full boost at part throttle, with the expected results. If you get a good tune on a Subaru it will be fine. The problem are the owners not realizing how bad the OEM tune is, and changing parts without getting a good tune. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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