I think its safe to say that peoples set ups , eg pipe, fuel , car , driving ability , gearing etc etc can make an engine look good when its dialed, some days you may see the same engine in another car not look impressive at all ... I think its safe to say that a good set up and tune has a lot to do with this and its moot to blame the engine for this ..whatever brand it is .. Ive seen Go engines go harder than V Specs and vise versa , ive seen modified Thunder Tiger Pro .21 engines keep up with RB C6BB's ! ( YES I DID RUB MY EYES ) And OS TZ.12 Modified shoot past Rossi 3CT modidfied on the straight .. ( yep rubbed my eyes again )

Getting the most out of your engine is up to you to learn how. It takes time but when you see the guys that got it going on you can appreciate the engine at its full potential .