Has anyone bothered to try putting a sleeve in the block, slapping some decent rods/pistons in, doing some head work, and throwing on a good tune? I don't mean to make it sound easy, especially with the $$$$ that it would take. But for someone that want's to build a reliable, high hp R56 S, then that's what it would take.

I came from the Honda world. Doing all that would net you some SERIOUS power with a nice sized turbo. I've seen 160 (1.6L) crank hp motors with less work than above, dump out 450-500 to the wheels.

While I'll never step foot into the higher horsepower areas of my Mini (daily driver and I want reliability), it would be nice to see what people would do with actually building a motor from the bottom end up.

 

Hondas are really well known for being really Good at high end HP .
You'll get lot of HP gain on even stock NA engines after boosting it, especially on K or B series engines.




I do Not know about Max safe limits of N18, But I really Hope that My R56 Will not Blow up at 240 WHP.
it's still running strong.

 

I got my 2010 to 310 pushing 30lbs of boost before she blew and all that happened was low compression on one cylinder, if you are going to daily the car I would go 300 horse