oo, i think ill do a huge research on engines this weekend. But generally, the more ports the better? And i bet the more ports the easier it is to mount a Super Charger on the engines. no?

No, and no. It is said, but it is NOT a rule, that more ports=more top end. Of course there are exceptions to this, as the statement actually has no bearing on reality, in which a 7 port motor can be built for torque, just as a 3 port can be made for high end (only need to look at the V-spec for an example of this)...but, it is a good rule of thumb...the RB WS7 (7 port) is a toppy engine. And the S5 (5 port) is a low end engine. When looking at RC engines, and thinking for top speed, you only need to look at the RPM limit. Obviously a motor that tops out at 42000 rpm is going to be quicker at the top speed than one that tops at 32000, but for a technical track the low RPM engine might be more suitable developing more toraue at lower RPMs. It's horses for courses, as they say...I run an S5 cos my track is technical, I don't need to reach 50mph or even close, I want lightning acceleration, and the S5 gives me that.

Superchargers are pointless on RC engines, I can't be arsed to get into it, but basically they don't even generate enough extra horsepower to pull their own weight. Honestly, forget that idea...

LOL, so there isnt even a significant difference???

Correct. The fundamentals of a 2-stroke, single cylinder engine negate the benefits of forced induction completely. They just don't work that way...

hahahah, what a waist of space/extra weight. foxy, thanks for the huge tip. Ill keep it in mind when building my next bashing buggy