Pimplegreen, You really shouldn't be asking a bunch of people you have never met about an engine your gona spend your $$ on!!! For one our altitude makes a HUGE difference that most people on here don't understand, not to mention the tuning window is very very small at our altitude. Yeah there are some knowledgeable people here on RCT but in general all your going to get is biased answers or someone telling you to buy what they are selling at the time. Most people here say the B5 is a powerhouse engine in any buggy or truggy and I am sure you have seen with your own two eyes they struggle in a truggy up here. I am sure a modded engine is going to make more power for you but as a person thats fairly new to tuning these engines it might also be a lot harder for you to tune. You have a lot of people here locally that can offer you a lot of help, there is a reason you don't see many of the fast guys around here running economy $200 engines.