Bad drone/resonance
#21
#24
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peterv8 (08-26-2017)
#26
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Yeah. I think they chose the cats because they are right next to the bell housing bolts. Not a terrible job but you need to drop the exhaust to drop the down pipes and access the bell housing bolts. I would just mimic the factory stuff. I sold mine but almost wish I'd kept them to make patterns off of.
#27
Join Date: Jan 2015
Location: Naperville, Illinois USA
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There is a thread here somewhere, where a member bought the brackets and posted a great drawing of one of them, so that others could make their own (think the other side was a mirror image, so only need to post up one).
EDIT: Found it:
https://www.jaguarforums.com/forum/x...-165469/page4/
May not have been a mirror image, but he didn't supply the other side.
EDIT: Found it:
https://www.jaguarforums.com/forum/x...-165469/page4/
May not have been a mirror image, but he didn't supply the other side.
Last edited by kj07xk; 08-28-2017 at 03:48 PM.
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Queen and Country (08-28-2017)
#28
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I checked the listing again and they state it's for the 4.2, have sent them a message so we'll see how they solve it.
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Last edited by peterv8; 08-30-2017 at 08:59 AM.
#29
#31
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Yes that is a 5.0L rear box
Providing you also purchased the 5.0 mid pipe as well from the wrecker it will bolt up to your downpipes.
If your using your existing mid pipe (4.2L) it will have to be modified or the rear box will have to be modified up to your exhaust guy
Providing you also purchased the 5.0 mid pipe as well from the wrecker it will bolt up to your downpipes.
If your using your existing mid pipe (4.2L) it will have to be modified or the rear box will have to be modified up to your exhaust guy
Will try and find a 4 tip instead. Soon the car will be going into winter hibination and hopefully I'll find a 4 tip til spring. :-)
#33
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Yeah, 2 tip is Xk, different sounding box.
Might be worth spending some time sorting out a Helmholz resonator for your other mufflers. I'm working that way myself. Fascinating stuff and i hope it works. Google is your friend.
A calculator for figuring the volume chamber and neck sizing to eliminate the drone. You need to know what frequency ranges based off of the RPM when it drones. 2100 rpm x 4 pulses per rev / 60 seconds give the pulse per second, 140 hz.
http://hyperphysics.phy-astr.gsu.edu...cavity.html#c4
Back ground
https://preserve.lehigh.edu/cgi/view...15&context=etd
Might be worth spending some time sorting out a Helmholz resonator for your other mufflers. I'm working that way myself. Fascinating stuff and i hope it works. Google is your friend.
A calculator for figuring the volume chamber and neck sizing to eliminate the drone. You need to know what frequency ranges based off of the RPM when it drones. 2100 rpm x 4 pulses per rev / 60 seconds give the pulse per second, 140 hz.
http://hyperphysics.phy-astr.gsu.edu...cavity.html#c4
Back ground
https://preserve.lehigh.edu/cgi/view...15&context=etd
Last edited by Ranchero50; 08-31-2017 at 04:12 AM.
#35
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Yeah, 2 tip is Xk, different sounding box.
Might be worth spending some time sorting out a Helmholz resonator for your other mufflers. I'm working that way myself. Fascinating stuff and i hope it works. Google is your friend.
A calculator for figuring the volume chamber and neck sizing to eliminate the drone. You need to know what frequency ranges based off of the RPM when it drones. 2100 rpm x 4 pulses per rev / 60 seconds give the pulse per second, 140 hz.
Cavity Resonance
Back ground
https://preserve.lehigh.edu/cgi/view...15&context=etd
Might be worth spending some time sorting out a Helmholz resonator for your other mufflers. I'm working that way myself. Fascinating stuff and i hope it works. Google is your friend.
A calculator for figuring the volume chamber and neck sizing to eliminate the drone. You need to know what frequency ranges based off of the RPM when it drones. 2100 rpm x 4 pulses per rev / 60 seconds give the pulse per second, 140 hz.
Cavity Resonance
Back ground
https://preserve.lehigh.edu/cgi/view...15&context=etd
On my loud exhaust the mini silencers have a nut welded on and a bolt is in place, anybody know what it's for?
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#36
#37
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Ranchero50 (08-31-2017)
#38
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Found an XKR exhaust and it's on the car, It's so quiet in the car now!:-)
As mine is an XK I don't have the vacuum pump to operate the valves so I have set them on allways open and the sound is nice. I do hear a weak drone at 1200-1300rpm which I believe Jaguar made the extra mounts for but the drone is so low to me that I hardly hear it.
We'll see if I try to do something with the other exhaust as the sound outside the car is assume but need to fix that drone!:-)
As mine is an XK I don't have the vacuum pump to operate the valves so I have set them on allways open and the sound is nice. I do hear a weak drone at 1200-1300rpm which I believe Jaguar made the extra mounts for but the drone is so low to me that I hardly hear it.
We'll see if I try to do something with the other exhaust as the sound outside the car is assume but need to fix that drone!:-)
#39
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Queen and Country (09-24-2017)