The WS9 is always going to struggle a little bit in truggy. This engine was designed as a buggy racing engine in a way that the bottom end would be very smooth and controllable in a buggy, not to mention it was designed for Euro tracks where high corner speed is a lot more common and 180 degree turns right in front of jumps are rare. The way it delivers power leads most people to think it has no bottom end. There are several ways you can make the engine feel a little more snappy. To start.. what is the gearing on the truck?? A nitro motor is no different than an electric motor, if you don't gear it proper it's going to seem to lack power and probably run hot. If you are at 48 on the spur try going up to 50. Also you want to make sure your clutch is more on the heavy side, with a WS9 you want that thing to spool up as much as possible prior to engaging the clutch. As for pipe/header you should be using the 198 header no matter what and the 2020 pipe will wake up that engine even more. The 2045 may also work well for you if you have the gearing and the clutch in the sweet spot.

More than anything the gearing is going to help you, I run the WS9 only in buggy but I race at high altitude where we loose about 20% of the overall power of these engines. In a Losi buggy that comes stock with 13/48 gearing I run 13/50. This gives me the great bottom end needed for big jumps with short run ups as well as plenty of top end on 180 foot straights. I have tried 12/48 gearing and that was a little too dramatic as it was full song less than half way down the straight.



[QUOTE=JonnyW;6689589]