Well, we played with my 367 in a Losi 8ight yesterday. I dropped a different crank in it. Its one fast engine, actaully too fast, because it seemed like my local track was too small to see this engine run all out. Another racer has one at my track and saw mine. He asked about the engine and I told him it wasn't bone stock. He wanted to see it run, and from the start coming off a jump onto the straightaway, he definitely said it was faster than his. In the middle of the straightaway, we backed off, and full throttled and it took off some more. I'll be doing some R&D on this 367 unit. As for bottom end, it plenty of power. Botom, mid and top. I ran this engine with a Ofna 086 header and pipe set. I'll check it again with 9901. I believe the 9901 will smooth this engine out, as it seemed very hard to controll with an 086.