I personally don't recommend tuning N13 engine unless you go stage 2+ (upgrading turbo, cooling system , maybe consider hybrid turbo etc) . it reaches oil temperatures of 110º C even when it is stock. That's more than enough to strain the engine and its parts.
There is a reason why they prefer to produce their own three-four cylinder compact engines. PSA engine is a success by means of power output and fuel consumption however, it's been struggling with various problems since the beginning especially when it is tuned.
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