The Supertrapp may be tuned to be beneficial to low end torque, but is it due to increasing backpressure? Is another tuning effect occurring ? What's the explaination of the effect at the the cylinders and valves. Among a number of factors more torque is due to more fuel burned. Are we preventing some fuel/air mixture from going out the exhaust? Is the header/collector and cam optimumly sized or are we overcoming a deficiency there? If backpressue is the tuning parameter, then we could weld a large gate valve on the end of the exhaust pipe and adjust to the best desired performance. If that works best then its fine by me.
