| Author | Message | ||
     Duff24 |
Correct me if I'm wrong, but I was talkin to a guy the other day who owns a custom bike shop here. He just got a new dyno in his shop, so of course me and a fellow badwebber were askin him if we could do some tuning on our bikes, especially if we got the DirectLink package. He was tellin us that our motors are actually like (two) single cylinder motors sharing a crank. I kinda looked at him like WTF? Kinda makes sense. But we talked some more and here's my question: If we've got 2 cylinders, why is there only one o2 sensor?? Obviously the rear cylinder is gonna be running differently than the front, due to less airflow, A/F ratio, and so on... Also, he made a point that true dual exhaust should run better because it's not working off the other cylinder's backpressure, air-fuel mixture (for tuning), and what have you... | ||
| M1combat |
A true dual exhaust can give more PEAK power, but a good two to one should give a more broad power curve. The tuning of a two to one system will allow low pressure pulses in one pipe to help the other pipe scavenge... There are benefits and advantages. WRT the cyls running different... Buell knows this and has it programmed into the fuel system. No problem. |
