apparently theres a guy in burnley that will drop an avantime 2 ltr turbo (250bhp) in your 172 & tune it to over 300hp with a few mods. I know a guy who has 20 of these engines - SANDER 01254 386661. Sander has his number but i believe he charges about 6k for the conversion - he braces the bottom end & fits forged pistons etc. anyone else heard about this ???