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Hello everyone,
I've ordered an F-type S V6; and so now I've the time for study carefully the car's specs:
I had a look at the exhaust system, exactly at the internal section of the rear muffler. Honestly, jaguar has done an impressive work on the exhaust system, every single detail it's just extremely accurate in order to make the car sounding phenomenal. By the way, I ask me how the exhaust gas get out the muffler when the electrical valve is in closed position? Do they pass from those tiny tubes in front of the tubes without the valves? Aren't they too small? I mean they would create an high back pressure in the exhaust.
Look at the image down here, anyone could have an answer to my question?
Thank you.
I can't answer your specific question because I own a base car without the active exhaust. Obviously I can't see inside the muffler housing, but I can say the std. sport exhaust has 2 straight pipes into the muffler without the valves.
What is significant is that it does not have those J-pipes that flair off into the muffler ahead of the valves. Otherwise it looks the same as your picture.
My impression is that it is loud all the time, and contrary to conventional wisdom, it the active exhaust system may just quiet the car down when the valves are closed, but the base "sport" system is just louder all the time.
I commented previously here that may be something that Jaguar would rather not talk about, because the active exhaust is an option and something featured in all the marketing.
I think it will take the green way through the holes ( see yellow mark ) in the internal partition of the muffler.
I think this could be the right way. At the beginning I think at the same your route; but later I changed my mind because each of those tubes seem sigillated by a welded cap (see them in the blue circle). Anyway you're surely right, because if there is not an hole there, the muffler would just blow up because of the pressure. Maybe those "welded cap" are just metal adaptors that reduce the gas flow.
What I'm wondering is whether the valve is open or closed to make it louder?
Closed is the answer that makes the most sense to me because it bypasses the chamber inside the muffler forcing everything through those J-pipes. The std (non-active) exhaust is open all the time, because there are no valves. However, people most often refer to the operation of the active exhaust system as opening the valves.
What I'm wondering is whether the valve is open or closed to make it louder?
Closed is the answer that makes the most sense to me because it bypasses the chamber inside the muffler forcing everything through those J-pipes. The std (non-active) exhaust is open all the time, because there are no valves. However, people most often refer to the operation of the active exhaust system as opening the valves.
That's a good question..I think when the valve are open, the exhaust gas is subjected to minor restrictions thereby the exhaust makes more aggressive note. But I'm not pretty sure
My understanding:
Dynamic exhaust valve is closed in quiet mode.
Standard exhaust could be as loud as open valve dynamic exhaust (if the internal baffling is the same as that on the primary flow path of the dynamic exhaust.
Open-valved dynamic exhaust is a bit more free flowing due to multiple pathways (less flow restriction) through a small section of the exhaust system (again if the primary pathways are similar to each other).
Since I had the experience of driving one, and immediately driving the other, my perception was the base exhaust was essentially indistinguishable from the V6S with active exhaust on the "loud" setting.
Do you mean V6S? I test-drove the V8S before mine was delivered, and after I switched on active exhaust, I about bailed out - sounded like we were under antiaircraft fire. But the V8S is much louder.
Do you mean V6S? I test-drove the V8S before mine was delivered, and after I switched on active exhaust, I about bailed out - sounded like we were under antiaircraft fire. But the V8S is much louder.
Yes, that was a typo, but I don't know about louder from a measured dBA perspective, just a different frequency/tone. V8s always have a lower frequency rumble, which can be more painful at the same decibel level.
That's excellent! I haven't seen anything with that level of detail yet. It appears on the V8, that the outer pipes are only used when the valves are open.
That link works and answers the question about valves being open in the "loud" position. Since the std. base V6 exhaust is open all the time, I guess that's why it is considerably louder than the V6S with the valves closed.
Obviously, this is just a V6-only issue since all V8s have active exhaust std. It also provides some insight as to why active exhaust is becoming std. on base cars in 2016.
It's a rather curious paradox that the only reason for one to order the active exhaust option on a base car is to have ability make it "quieter," but I doubt very seriously anyone who ordered that expensive option understood that.
I think it will take the green way through the holes ( see yellow mark ) in the internal partition of the muffler.
Looking more closely, it appears the ends of the pipes on the route shown do have caps welded over them. There are however a series of perforations in the pipes an inch or two from the ends.
01-22-2015, 06:34 AM
Just a curiosity about the exhaust
But the V8S is much louder.
