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This exhaust came on the car and I have no OEM exhaust to switch with.
I have a loud drone at around 1500rpm, is there anything I can do cheaply or is
it best to buy another exhaust? I love the sound of it outside but it is getting a bit to loud for me in the car too.
If you have access to that lift, it shouldn't be to hard to isolate where the drone comes from with someone holding the engine at 1500 rpm. Find what's vibrating or if it's internal to that exhaust.
Jag had its own drone issue on early models and made a set of clamps that went on the cats and bolted to the transmission housing.
Even with OEM exhaust there was a narrow RPM range drone on the XK. Jaguar design related. There is a Jaguar procedure to fix it, but it's quite involved. Whether your exhaust compounds it or not I don't know.
If you have access to that lift, it shouldn't be to hard to isolate where the drone comes from with someone holding the engine at 1500 rpm. Find what's vibrating or if it's internal to that exhaust.
Jag had its own drone issue on early models and made a set of clamps that went on the cats and bolted to the transmission housing.
It's on my scissorlift in the picture!:-D
How do I find the drone, feeling on the pipes for vibrations with engine running at 1500rpm?
Originally Posted by mosesbotbol
Even with OEM exhaust there was a narrow RPM range drone on the XK. Jaguar design related. There is a Jaguar procedure to fix it, but it's quite involved. Whether your exhaust compounds it or not I don't know.
If you have the skill and time, experiment with different mufflers. I played with mine to minimize most of the drone but I have issues around 2100 rpm. My build thread spent a good bit of time on the muffler trying to tune the sound.
Hoping to pick up a stock XKR box tomorrow for comparisons sake.
Drone is an issue with almost all aftermarket exhausts, except Corsa. Mfgs like GM and Jaguar deal with drone through an "active exhaust".
Suggest research into Helmholtz resonators. A U.S. company, Synapse Engineering, is now selling Helmholtz exhaust resonators. See: https://www.carid.com/synapse-engine...285628807.html
I have driven both the xk8 and xk models and have never heard of any drone with the stock Jaguar exhaust. My advice would be to bring it back to stock.
Don't bother with a no-name aftermarket "look-a-like oem" exhaust. It will likely drone.
Perhaps the best alternative is a used OEM exhaust. Ebay USA has this XK version for $500: 09 Jaguar XK Exhaust Muffler Silencer 6W83 5K244
If you want the XKR version expect to pay a lot more. The XK and XKR are both "active" exhaust. The XK version has a spring-loaded valve, and the XKR version has an electrically-operated valve.
Correct. The constant attempts to "improve" aspects of these cars is an attempt to second-guess engineers who know intimately the cascade effects of changes (the substitution of poly suspension bushings is a perfect example). Jaguars are engineered for refinement consistent with performance and longevity. Fiddle with things and you lose something to possibly (and the adverb is important) gain something.
That said, it should be noted that the early cars had a resonance problem in the lower rpm range - very annoying. Jaguar solved this with a bracket kit (which an earlier respondent mentioned) that stabilizes the catalytic converters (I think) to the transmission case. It works brilliantly, entirely eliminating the resonance. I had this done on my 07 years ago. Instant relief!
I have found an OEM muffler for a good price!:-)
When it arrives I will mount it and hopefully the drone is gone. Could be I need the bracket kit as my car is an early one.
When I have a quiet car with the OEM muffler I will try your suggestions and see if I can get the drone to be a little less with my loud muffler.:-)
Jag's solution included additional hangers and clamps to mitigate the drone.
Originally Posted by sov211
That said, it should be noted that the early cars had a resonance problem in the lower rpm range - very annoying. Jaguar solved this with a bracket kit (which an earlier respondent mentioned) that stabilizes the catalytic converters (I think) to the transmission case. It works brilliantly, entirely eliminating the resonance. I had this done on my 07 years ago. Instant relief!
Mine is a 2006 so I would like those brackets!
I might have them so how do they look and where are they mounted?
Is there a part number?
Mine is a 2006 so I would like those brackets!
I might have them so how do they look and where are they mounted?
Is there a part number?
I believe there's some welded supports to underneath the body. I would look underneath for supports that were added after. Most likely you did not have this TSB done as it seems Jaguar wasn't promoting the fix unless you complained.
Bad drone/resonance
