Hi everyone,
I came across with something called SDI by RYU performance, apparently each of the SDI’s do is let more fuel into the engine therefore bigger fuel injection helps performance, but also using more fuel the SDI burns the fuel more efficiently and economically giving upto 10bhp. I was wondering if anyone have used this before and what the improvements were ?

RYU Performance - R56 BMW Mini Components - Electronics (http://ryuperformance.com/shop/R56/R56_electronics/R56_bmw_mini_ryu_electronics.htm)