Drivetrain (Cooper S) MINI Cooper S (R56) intakes, exhausts, pulleys, headers, throttle bodies, and any other modifications to the Cooper S drivetrain.

Drivetrain Built Motor opinions

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Old Feb 2, 2020 | 03:19 PM
  #1  
Tom.R56's Avatar
Tom.R56
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2nd Gear
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From: Sunnyvale CA
Built Motor opinions

Hello,
My N18 needs a rebuild, most likely piston ring failure in cylinder 4 and I wanted some opinions on my plans to build the motor. The car is going to be a dedicated track car after this rebuild and I want to make sure that the engine is going to be bulletproof. Its going to run my RPM stage 3 tune with a JMTC S42 turbo and my goal is 280whp. Here is the parts I'm planning on using in the image below, try to convince

me not to sell and move to a miata
 
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Old Feb 10, 2020 | 03:09 PM
  #2  
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oldbrokenwind
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From: Northern NV
Using stock size pistons is a huge risk, especially with suspected ring damage. Cost of machine shop over-bore is negligible, and well worth it to ensure a "bulletproof" build.
 
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Old Feb 10, 2020 | 06:43 PM
  #3  
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Tom.R56
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From: Sunnyvale CA
Sounds good, thanks!!
 
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