On The Road Again, I've read a little about exhaust tuning and never seen anything about pipe size versus torque, except maybe on two strokes.
Please tell me I'm wrong that the best thing to do with exhaust pipes is use a size that reduces back pressure as much as possible.
Headers are a different matter. Differences in horsepower and torque from different header designs are easily documented, but I've always heard that max values are achieved when the headers are run open. No other exhaust system at all. That made it seem to me that best performance, both power and torque, would be achieved with the least amount of back pressure.
I think I may be able to do some experiments with back pressure in the not too far distant future. If I do, I'll share my results.
