The modified B6 is very powerful....it has no issues pushing a truggy on our track that has very high traction..... It has a substantial amount of work done to it....exhaust port is cut, boost port is cut, transfers are cut, head button is cut, crank is cut,piston is cu etc. etc.... Now I also can also custom tune a engines powerband to suit your needs if you so desired....For example I have had customers who run on astroturf need a engine with substantially more bottom end then the engines we typically run over here......I have pretty much full control over how much power an engine can make, and where in the powerband it will make that power...As well as how aggressively the engine will respond to throttle input....... As a rule all my current modified engines will all have very strong bottom ends..I find engines work better on the track if they have stout bottom ends...they are usually easier and more forgiving to tune on the LSN, they are also more forgiving and more flexible on clutch tuning...they can be tuned from mild to wild very easily.....When a engine has good bottom end efficiency they tend to have a much broader sweet spot on the LSN and still make usable power...If a engine is light on bottom end they tend to become too picky to tune on the LSN...the needles has to be set perfect or the engine won't make usable power....