I have many questions about the dual exhaust setup.
1) aren't the 2.4T and 2.4 T5 single turbo designs? Then that means the exhaust gases after the manifold are already being recombined. Then, wouldn't the whole puprose of the dual exhaust get lost since the gases from each cylinder bank are being recombined anyways?
2) if this is for a 2.4 standard that would make more sense since each cylinder bank could have an independent exhaust path. but that's only if there are dual cats already in place. I doubt that the 2.4 benefits as much from a dual exhaust due to the lower engine output.
I don't even know if the standard s60 has a dual exhuast, but I'm trying to rationalize if it's a performance enhancement or a visual enhancement.
Yes, i know that part of the point is to reduce backpressure, but that can be done with a single exhaust as well. I would think that having a single exhaust would be the most practical because a turbo-back dual exhaust split into two pipes probably hurts performance since the scavage cycle gets recombined from two separate pipes (i.e. that would be the same kind of problem as mixing the exhuast gas from the uneven lenght headers).
I am not an expert at these things so feel free to comment, I am just trying to think out the theory in my head.
I guess if the s60 has dual turbos, then the above is void and I stand corrected. :> )
[This message has been edited by joe_flies (edited 03-04-2001).]