F-Type ( X152 ) 2014 - Onwards

Symposer Defeat

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Old Mar 1, 2024 | 10:22 AM
  #121  
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Originally Posted by clubairth1
Hey your the first one I have heard that installed one.

What do you think? I like the metal construction and the added nipple for measuring boost.
I just have a plastic cap with a clamp on it blocking my Symposer off. Not very pretty for sure!
I think I might have been the third to report in on this thread:

https://www.jaguarforums.com/forum/f...erence-277313/

Just installing the new piece was easy, and it's nice and clean. Actually removing the symposer is a chore, especially if you forgo the pleasure of destroying it on the way out. I got it out in one piece, with the only damage being to cut the hose to the firewall. I wanted to get that off in one piece, just as a point of pride, but abandoned that idea in favor of wrapping up the job without bloody knuckles.
 
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Old Mar 1, 2024 | 02:35 PM
  #122  
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Originally Posted by clubairth1
Hey your the first one I have heard that installed one.

What do you think? I like the metal construction and the added nipple for measuring boost.
I just have a plastic cap with a clamp on it blocking my Symposer off. Not very pretty for sure!
.
.
.
Take a look at this thread..

https://www.jaguarforums.com/forum/f...erence-277313/
 
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Old Feb 15, 2025 | 01:12 PM
  #123  
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Today I have defeated my symposer on V6S. On a scale of 1-10 I would say you can hear engine +1, supercharger +2, and drone reduced -2. The cabin feels a bit cleaner, the symposer makes quite weird filling unpleasant sound. However, I have to say, that I find open exhaust under throttle after 4000 rpm is still boomy/drony inside the cabin. I am quite surprised nobody mentions this.
 
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Old Jul 10, 2025 | 04:51 PM
  #124  
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After the engine replacement job last month I noticed more of a droning sound in the cabin combined with a rushing sound (more on this later) that were not there before. It turns out that when I bought the car 18 months ago, the previous owner must have defeated the symposer somehow and that fix was lost when the engine got replaced. I've used a cork this time and the car is back to sounding much much clearer, as it's always been. I daily mine so I was not happy with the mix of engine and exhaust sound with some undefined noise. So, thank you loads to the OP for starting this thread all those years ago.

Back to the "rushing" sound, it's still there. Not as noticeable now but still bothering me.

It happens if I have the throttle about 30% open between 2 and 2.4K RPM in 4th gear then it disappears. If I just feather the throttle in 4th gear and wait for speed to pick up, I can't hear it. Hope this makes sense. I found the video below that shows a very similar noise. Again, in my case it only lasts a few seconds then the engine is back to sounding as normal. If anyone's seen this before and could advise, that'd be great. I'm having the first oil change done next Friday as the engine has now done 1K miles at my regular specialist who did an amazing job putting the new engine in and they said they can have a look but I'd much prefer to come in and tell them what to look for.

 

Last edited by WSHudds; Jul 10, 2025 at 04:55 PM.
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Old Jul 10, 2025 | 08:20 PM
  #125  
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Originally Posted by WSHudds
After the engine replacement job last month I noticed more of a droning sound in the cabin combined with a rushing sound (more on this later) that were not there before. It turns out that when I bought the car 18 months ago, the previous owner must have defeated the symposer somehow and that fix was lost when the engine got replaced. I've used a cork this time and the car is back to sounding much much clearer, as it's always been. I daily mine so I was not happy with the mix of engine and exhaust sound with some undefined noise. So, thank you loads to the OP for starting this thread all those years ago.
You're welcome. It lends credence to the idea I have had that the sudden off/on behavior is more noticeable with the 6MT.
 
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Old Jul 10, 2025 | 08:24 PM
  #126  
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Originally Posted by WSHudds
Back to the "rushing" sound, it's still there. Not as noticeable now but still bothering me.

It happens if I have the throttle about 30% open between 2 and 2.4K RPM in 4th gear then it disappears. If I just feather the throttle in 4th gear and wait for speed to pick up, I can't hear it. Hope this makes sense. I found the video below that shows a very similar noise. Again, in my case it only lasts a few seconds then the engine is back to sounding as normal. If anyone's seen this before and could advise, that'd be great. I'm having the first oil change done next Friday as the engine has now done 1K miles at my regular specialist who did an amazing job putting the new engine in and they said they can have a look but I'd much prefer to come in and tell them what to look for.

https://youtube.com/shorts/BfvT4aDyc...SEe1qXTSSPFVxC
I can't hear anything unusual in that clip. Maybe it's the video clip, maybe it's my workstation, or maybe it's my hearing. <shrug>
 
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Old Jul 11, 2025 | 02:24 AM
  #127  
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Originally Posted by lizzardo
I can't hear anything unusual in that clip. Maybe it's the video clip, maybe it's my workstation, or maybe it's my hearing. <shrug>
It's not the best clip but you should be able to hear a type of hissing sound coming on at about 5 seconds if you play it in a quiet environment or through headphones.
 
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Old Jul 11, 2025 | 01:13 PM
  #128  
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Originally Posted by lizzardo
You're welcome. It lends credence to the idea I have had that the sudden off/on behavior is more noticeable with the 6MT.
There's definitely a noticeable difference. I knew about this thread shortly after I bought the car but I thought it sounded to clean that I was inclined to believe that it had been stuffed with something. I think people driving an MT car should most definitely try it and see the difference for themselves. It's the best mod next to fuse 15 😊
 
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Old Jul 12, 2025 | 09:47 AM
  #129  
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Originally Posted by lizzardo
If you're like me (don't feel bad if you're not: not many are) you don't like the sudden change when sound suddenly gets pumped into the cabin by the "symposer" system. I like to hear the engine sounds coming from the front and the exhaust sounds coming from the rear. The directionless noise that appears when I hit the right RPM and load is annoying to me.

Here's how to defeat it, and it takes only a few minutes and pennies worth of material.

Remove the engine top cover by pulling it straight upwards. There are four grommets that secure it.

Here's the fitting that connects the top of the symposer to the tube that pumps sound into the cabin. Remove the indicated bolt.



Wiggle that elbow as you pull upwards on it. It should come loose like this:



At this point, I rolled up some ensolite insulation left over from a sound-deadening project a couple of cars back and blocked the passage. If you don't have that, perhaps a cork could be carved to fit: Maybe from some Tattinger or a nice claret.



Reassemble and drive.

I'm probably going to try putting a ball valve into the hose, not because I think I'll ever want to re-enable it but so that I can from time to time as a reminder of why I don't like it.

This is what happens when a manufacturer makes a super car available to the masses.🤦‍♀️ Just waiting for the person to find a way for the v8 to temporarily run on 4 cylinders to save gas.🤡
 
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Old Jul 12, 2025 | 10:36 AM
  #130  
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Originally Posted by F-type-r-2022
This is what happens when a manufacturer makes a super car available to the masses.🤦‍♀️ Just waiting for the person to find a way for the v8 to temporarily run on 4 cylinders to save gas.🤡
I'm puzzled. Which this is that? The existence of the symposer or the desire that it not exist?
 
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Old Jul 12, 2025 | 10:40 AM
  #131  
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Originally Posted by lizzardo
I'm puzzled. Which this is that? The existence of the symposer or the desire that it not exist?

“desire that it not exist?”
 
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Old Jul 12, 2025 | 10:48 AM
  #132  
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Originally Posted by F-type-r-2022
“desire that it not exist?”
Ah, that this. I contend that this is what happens when the factory puts in something that cheapens the experience of a GT car (it's not a supercar).
 
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Old Jul 12, 2025 | 11:11 AM
  #133  
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Originally Posted by lizzardo
Ah, that this. I contend that this is what happens when the factory puts in something that cheapens the experience of a GT car (it's not a supercar).

And that’s why Jaguar as we knew it doesn’t exist anymore— MARKETING.

The F-Type is sports car; a 2 seater roadster to be specific with top speed of 199mph or the current 186MPH (300kph)—its à super car. The XK was Jaguar’s GT car.

If the car was more expensive and was ONLY ever offered as a V8 with top trim; people would not treat it like a Mustang Cobra where there are never ending modifications to be made because the car is too accessible.

The Lamborghini Urus, ACTUALLY has sound pumped in through the speakers, BUT you won’t hear many non-YouTube influencers trying to fiddle with that vehicle because it is NOT mass marketed and is NOT affordable.☮️




 
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Old Jul 12, 2025 | 12:02 PM
  #134  
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We’ve had this debate many times over the years, GT vs sports car vs supercar. Not enough storage for GT, too heavy for a sports car, and the V6 at least isn’t a supercar. And some think the V6 (and I-4) cheapen the V8. Happily, I’d rather drive than get into semantic arguments. In fact, I drove mine 930 miles yesterday, at near full storage capacity. Today, I’m only running out to the store.

I’ve done that 930-mile drive more than 20 times. And I’ve had great fun with it on the track a few times. Call it whatever makes you happy.
 
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Old Jul 12, 2025 | 12:18 PM
  #135  
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Originally Posted by DJS
We’ve had this debate many times over the years, GT vs sports car vs supercar. Not enough storage for GT, too heavy for a sports car, and the V6 at least isn’t a supercar. And some think the V6 (and I-4) cheapen the V8. Happily, I’d rather drive than get into semantic arguments. In fact, I drove mine 930 miles yesterday, at near full storage capacity. Today, I’m only running out to the store.

I’ve done that 930-mile drive more than 20 times. And I’ve had great fun with it on the track a few times. Call it whatever makes you happy.

A Porsche Turbo S has more storage, is heavy, exceeds 200mph, but Porsche says it’s a Sports Car and they are correct making the F-Type even more of a Sports Car.

For me, it’s not a debate; it’s what the manufacturer says the vehicle is and is backed up by their design. You can say you don’t like it or they failed, but the F-Type is Jaguar’s version of a Sports Car according to the design team and who are we to say different. People forget that they used to make and sell the F-Type and the XK at the same time. The XK with its wood and THICK leather was clearly competing with Aston Martin and Bentley, but the F-Type was targeting Porsche.
 
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Old Jul 12, 2025 | 12:19 PM
  #136  
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Originally Posted by F-type-r-2022
The Lamborghini Urus, ACTUALLY has sound pumped in through the speakers
So does the 2022 F-Type. It's called NGPTSQ (Next Generation Power Train Sound Quality).
 
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Old Jul 12, 2025 | 02:02 PM
  #137  
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Originally Posted by DJS
We’ve had this debate many times over the years, GT vs sports car vs supercar. Not enough storage for GT, too heavy for a sports car, and the V6 at least isn’t a supercar. And some think the V6 (and I-4) cheapen the V8. Happily, I’d rather drive than get into semantic arguments. In fact, I drove mine 930 miles yesterday, at near full storage capacity. Today, I’m only running out to the store.

I’ve done that 930-mile drive more than 20 times. And I’ve had great fun with it on the track a few times. Call it whatever makes you happy.
We use ours for road trips as well. I'd say it's somewhere in the middle of sports car and luxury GT. Obviously leaning towards luxury. Imagine a venn diagram. Excellent cars, keeps some of the engagement and fun while being complaint and quiet.
 
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Old Jul 12, 2025 | 02:08 PM
  #138  
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Originally Posted by CarlB
We use ours for road trips as well. I'd say it's somewhere in the middle of sports car and luxury GT. Obviously leaning towards luxury. Imagine a venn diagram. Excellent cars, keeps some of the engagement and fun while being complaint and quiet.
There are YouTube channels dedicated to watching Ferrari's, Lamborghini’s and other sports cars pull up to check into hotels, but that doesn’t make them GT cars.😂😂😂
 
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Old Jul 12, 2025 | 02:12 PM
  #139  
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Originally Posted by CarlB
We use ours for road trips as well. I'd say it's somewhere in the middle of sports car and luxury GT. Obviously leaning towards luxury. Imagine a venn diagram. Excellent cars, keeps some of the engagement and fun while being complaint and quiet.
I classify it to the sporty end of GT as well but as noted, it's not worth arguing about. The definitions are somewhat fluid. Do I enjoy the car? Most definitely yes. Do I enjoy it more with the accursed symposer defeated, and now removed. Also most definitely yes. If it did a better job (less intrusive) I might not have noticed it, so so not cared. Perhaps the NGPTSQ is more refined in operation.
 
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Old Mar 12, 2026 | 02:46 PM
  #140  
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FWIW, I tried the symposer delete suggested by OP (thank you for the clear and easy instructions), drove 200 miles and decided to go back to symposer. 2016 R.

Definitely quieter with delete, too mercedes-like.
 
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