Hey friends, My college team takes part in college level racing events. They currently use a KTM 390 engine(race limit is 600). WIth the 20mm restrictor rule we can generate around 30-33hp after some tuning, after the restriction of course. Now we want more power. We need it. So we have 2 options- turbo or super. Super reduces the already short life span of the engine, and adds weight that cant be recovered by the power it generates. So turbo looks like the only option. Now the problem is that the rules say that we must build the turbo ourselves, from scrap. Turbo parts allowed. So i am thinking of building one, but i wanted to know whether it will work or not? And what turbo is suggested, and what could be the possible increase in power? Please give supporting links, that also show how to make it and tune it. Also, if you feel super is possible, then please suggest with supporting info and links. P.S. Please DO NOT suggest getting a bigger engine, as that option is ruled out. We need to build a turbo or super. thanks in advance.