I'm thinking that might be a blip on the graph. I've never read anything from Andy that would indicate it really is running at 18:1. I'm pretty confident he'd have thrown out a warning on that.D_Nyholm said:Wow, that a/f looks pretty scary below 3500!!! Looks like you could also use a rev limiter increase with the 15% pulley since it is making max power at redline!!