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04-22-2021, 12:37 AM | #1 |
Scooby Newbie
Member#: 523826
Join Date: Apr 2021
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Piston Ring and head gasket failure
Got into a perdictament today, tuner told me my 2014 STI has a #4 Piston failure and a head gasket failure. Currently my car is running an AP w/ pro tune and Cobb Turboback exhaust. They are doing a tear down to see what else is going on.
I am trying to figure out what I should do, go OEM or go with a built motor. I don't have power goals, other than wanting to have some fun with the car. My primary goal is reliability and relatively normal maintenance. Can anyone offer any advice on what I should do? Below is what my tuner recommended I do while I am in there making changes. Start with: IAG Stage 2.5 closed deck short block Cobb Intake IAG or Cobb Fuel Lines and Rails. Cobb/ID Fuel Injectors (1050x or 1300x2 depending on power level) Fuel Pressure Regulator Fuel Pump EBCS AOS Later: Bigger Turbo Turbo Inlet MAP Sensor Ethanol Set up Header External Wastegate
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04-22-2021, 11:06 AM | #2 |
Scooby Specialist
Member#: 11652
Join Date: Oct 2001
Chapter/Region:
E. Canada
Location: Ontario, Canada
Vehicle:'18 Focus RS Red '70 Porsche 914/6 |
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04-24-2021, 03:14 AM | #3 |
Scooby Specialist
Member#: 191967
Join Date: Oct 2008
Location: Vancouver
Vehicle:2005 EVO VIII open source tuning subaru |
It appears that the new RA blocks are holding up pretty well. If you have no power goal in mind and want long term reliability thats probably your best optioni.
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04-24-2021, 08:07 AM | #4 |
Scooby Specialist
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:2005 2.5 SC OB |
I think a valid question is why did it blow up? If you put a new stock shortblock in and it blew up your last stock shortblock, what is it going to do to the new one?
IAG Stage 2.5 closed deck short block is way overkill for anything less than ~500whp I think. |
04-24-2021, 11:37 AM | #5 |
Scooby Specialist
Member#: 283429
Join Date: May 2011
Chapter/Region:
South East
Location: Down yonder.
Vehicle:2016 Fuji Sunfire 03 Silver |
I'll take "What causes detonation and lean misfire on a tuned Subaru?"
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