I saw one run the other day. It looks and sounds like a really good engine. However, the guy was running his smallest restrictor and it looked WAY overpowered. He could not even wind it out on the back straight. Not much would touch it power wise IMO. Not sure of runtimes. He was running an 086 pipe on it to try and soften up the low end a bit. I would love to have one but my trigger finger could never be soft enough to make use of it! LOL