Ugly_old_Poo_kid said:When you put a single pipe on a triple engine, the timing doesn't work very well.. The exhaust gas doesn't have the time to empty the expansion chamber before the next pulse hits, and it interferes with the harmonics.
At low RPM the effect isn't so bad. But at high, like 8,000 RPM, that's 24,000 exhaust pulses per minute (400 per second) for a triple vs. 16,000 per minute for a twin (267 per second).
You also have the effect with twins but not nearly as bad.. But if you pay attention, every hardcore race sled has 1 pipe per cylinder, no matter the number of cylinders.
Expect a 30% or more loss in HP going to a single pipe.cristekgwild said:well im not working with all of space so im not sure whats going on yet. and i really think we have no choice.