There is plenty of smoke right though the rev range. Car idles fine. It's that rich that its still spits unburnt fuel from the exhaust and I only get about 5 minting time from a full tank. I've had other drivers at my club try to tune it and they also so it's running extremely rich. I've tried different fuel's, different plugs, the motors always seamed to run hot since new ( has about 18 litres though it now) and it seams to like it when it's hot but it gets that hot that its killing my clutch bearings almost every race.