USA exhaust muffler/cat removal?
#1
USA exhaust muffler/cat removal?
I'd like to give the jag a little more sound... I know it goes cat, cat, resonator, muffler. Is removing the resonator the best option? I'd like more power but I assume that would only come with cat removal. Would removing the 2nd cat increase purr and power? I'm not looking for loud just a little more freeing tone. Thanks
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#8
I'm confused, is this based on jag service manuals or something? After the axle on the XJS is basically straight through glass packs. Typical of a straight through design that cuts down certain tones, these are resonators.
The center sections force a change in flow and cut down significantly more sound, they are mufflers.
Am I incorrect in thinking the rear components are resonators and that somehow, specific to Jaguar, the roles are reverse?
BTW with the cats in don't worry about the loudness. I have had both intermediate pipes disconnected. The transmission causes an annoying drone on the highway but i isn't remotely what I would call "loud", the 2 cats just create too much resistance.
The center sections force a change in flow and cut down significantly more sound, they are mufflers.
Am I incorrect in thinking the rear components are resonators and that somehow, specific to Jaguar, the roles are reverse?
BTW with the cats in don't worry about the loudness. I have had both intermediate pipes disconnected. The transmission causes an annoying drone on the highway but i isn't remotely what I would call "loud", the 2 cats just create too much resistance.
#9
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I just call 'em all "muffler" and call it good . If forced to take a stand I'd call the front ones mufflers and the rear ones resonators....although it seems the rear ones do most of the work.
Typically resonators are at the rear....but not always.
On my XJS I removed the front mufflers and there was only a very slight change in tone. When I replaced the rear ones with glass packs, though, the difference was significant.
On my present V12 I have 4 glass packs and an X-pipe. I'm happy with the sound. The x-pipe helps give a pleasant tone, IMO. Without the tone is a bit....odd.
Cheers
DD
Typically resonators are at the rear....but not always.
On my XJS I removed the front mufflers and there was only a very slight change in tone. When I replaced the rear ones with glass packs, though, the difference was significant.
On my present V12 I have 4 glass packs and an X-pipe. I'm happy with the sound. The x-pipe helps give a pleasant tone, IMO. Without the tone is a bit....odd.
Cheers
DD
#10
Agreed. I don't have the X pipe and I think the sound is not at all Jaguar like or pleasant. Actually makes it sound like a worn out econobox, not a sporting car at all.
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I'm confused, is this based on jag service manuals or something? After the axle on the XJS is basically straight through glass packs. Typical of a straight through design that cuts down certain tones, these are resonators.
The center sections force a change in flow and cut down significantly more sound, they are mufflers.
Am I incorrect in thinking the rear components are resonators and that somehow, specific to Jaguar, the roles are reverse?
BTW with the cats in don't worry about the loudness. I have had both intermediate pipes disconnected. The transmission causes an annoying drone on the highway but i isn't remotely what I would call "loud", the 2 cats just create too much resistance.
The center sections force a change in flow and cut down significantly more sound, they are mufflers.
Am I incorrect in thinking the rear components are resonators and that somehow, specific to Jaguar, the roles are reverse?
BTW with the cats in don't worry about the loudness. I have had both intermediate pipes disconnected. The transmission causes an annoying drone on the highway but i isn't remotely what I would call "loud", the 2 cats just create too much resistance.
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I'm confused, is this based on jag service manuals or something? After the axle on the XJS is basically straight through glass packs. Typical of a straight through design that cuts down certain tones, these are resonators.
The center sections force a change in flow and cut down significantly more sound, they are mufflers.
Am I incorrect in thinking the rear components are resonators and that somehow, specific to Jaguar, the roles are reverse?
The center sections force a change in flow and cut down significantly more sound, they are mufflers.
Am I incorrect in thinking the rear components are resonators and that somehow, specific to Jaguar, the roles are reverse?
The only car I have heard with these pre-axle main silencers removed, leaving just the tunnel straight through ones, was deafeningly noisy.
#14
The following 2 users liked this post by Steve M:
Greg in France (05-31-2018),
kjopen (05-31-2018)
#15
So now there's conflicting reports... removing the center preaxle "resonators".... too loud or just a bit more noise? The video above sounded nice. Is there a difference between euro and USA? There must be as the euro makes more power? I thought they were missing a cat or 2? I'm confused now
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I am talking about a V12, and yours sound very loud to me Steve compared with an OEM car.
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So now there's conflicting reports... removing the center preaxle "resonators".... too loud or just a bit more noise? The video above sounded nice. Is there a difference between euro and USA? There must be as the euro makes more power? I thought they were missing a cat or 2? I'm confused now
#20
Most British cats until around 1990/1991 had no cats on their V12. Mine doesn't. But the cats won't change the tone, as I have yet to hear a car where with a proper cat removal, the sound changes positively. Mostly just a drone or nasty resonance at the front. No matter if 3, 4, 5, 6, 8 or what not cylinder car.