When I first purchased the 2018 F-Type R, my wife noticed the whine of the supercharger the first time she was in the car without the radio on. Up until that point, I heard it but paid little attention to it given what I knew it was doing and what the car was capable of in terms of horsepower.

Now however, it seems to dominate the sound in the car even when the radio is on. Is it my imagination or can something happen that would cause the supercharger to whine louder?

Thanks

Bob

 

Could be the frequency is more noticeable under certain conditions. I never notice mine at all; my other car is full Mad Max though - you can hear the blower 2 blocks away.

 

The ladies hear different (higher) frequencies than gentlemen.



In other words, you should have listened to her observation.

 

Are you sure it's the supercharger? The symposer also adds a kind of whining noise although it's not as high pitched as supercharger whine. A diff issue can also produce a high pitched whining.

 

The sounds is definitely coming from under the hood.

 

There is no down side to defeating the symposer. Do a search here for the thread about it. Basically, the symposer pipes audio noise from the intake into your firewall.

 

Isn't the symposer funneling low frequency sounds to make the exhaust sound more impressive? What I'm hearing is a more high pitched whining sound that increases in loudness with RPM's.

 

Not sure what you are hearing, but yes, the Symposer "accentuates" the engine noise in the cabin, from the right bank of the engine via some tubing and a diaphragm.

Supercharger Oil Change & Extra Project - Symposer Removal! - Jaguar Forums - Jaguar Enthusiasts Forum

Symposer Defeat - Page 2 - Jaguar Forums - Jaguar Enthusiasts Forum

DC

 

Have you removed the engine cover? That will increase the whine from the supercharger some. Not sure if to the degree you describe though.

 

I tend to find I can hear whine until about 4000rpm when the exhaust noise takes over. Also you hear the whine more with the windows up. But it isnt like a hellcat whine, it is more like the whistle you get from turbos.

 

I plan on taking the car into the dealer for two other annoying issues and will bring this up too. The two other issues are 1) The "SOS System Functionality is Limited" warning light is constantly on, and 2) regardless of where the key fob is on my person, the car refuses to start saying that the remote key is not in the car. This happens even after I replace the battery in the remote. i have to hold the key up under the dash on the left side to start the car.

 

Check the little tangs in the remote are making good contact with the battery, sometimes they get bent down a bit and you need to bend them back up again (but very gently!).

 

Thought it best to refresh this thread with the latest I have learned about this topic from now direct experience. Recently I had my 2014 V8S in to preemptively replace the old coolant pipes to the new ones. This of course necessitated the removal of the supercharger as part of the process. When I got the car back I noticed a distinct increase in the supercharger whine which I never really noticed much in the past. I also noted that the deceleration pops and crackles had disappeared. Of course I got concerned and took it back today to my independent shop to have them check it out. I will also note that my engine cover has been off for over 5 years.

1. The whine definitely comes from the supercharger and appears around 2500rpms and disappears on shift or about 3500rpms whichever comes first.
2. It’s distinctly louder in dynamic and sport modes but does exist in normal drive mode.
3. I worked with the tech after an initial drive to show him and we popped the hood and started routing around and the first thing noted was the removal of the sound reading material that runs on either side of the supercharger. They had removed it when doing the coolant pipe work because it retains moisture from the vents and was corroding the hold down screws of the supercharger which they replaced
4. The material holding water is a known problem with the AJ engine especially if the engine cover is not in place which helps to shed the water away from that foam.
5. That material is a noice reduction effort that quiets the whine of the SC.
6. The pops and crackles have become to come back because he reset the “learning mode” for the transmission and ecu so it is relearning my driving style which is how the car helps the overruns happen. This is unrelated to the whine but was an after effect of the service and the car sitting in storage.

Bottom line lessons:
1. If you decide to remove the engine cover keep a close eye on the sound deadening material on either side of the supercharger when you wash the car or get in a heavy rain storm that allows water into the engine bay. Check often for moisture.
2. Be prepared To remove the material when you have your SC go through routine maintenance and you may want to remove it if wet and check the hold down screws for corrosion.
3. The whine will be more noticeable when this material is removed. You can either live with it or have the material replaced and take your chances. Or put the engine cover back on as well.
4. The symposer is definitely passing both high and low frequency sounds into the cabin. We did a check while testing for the whine while running up the rpm’s while we had it in the shop. Only option there is to pull the supposed out.
5. For those of you recently purchasing a used Ftype and your hearing that whine and wonder why you may want to see if the sound material had been previously removed from the supercharger.

As for me, I’m keeping the cover off, the sound deadening material out and enjoying all the sounds my cat makes.

 

Hey man! Did you ever figure out what the whining noise was coming from? I’m having the same noise coming from my V6 Type S. Sounds like it’s coming from the engine bay for sure. Increases in sound as the RPMs increases

 

Yes, I meant to come back and report on their supercharger findings. They told me that the idler pulleys bearings were shot. They replaced the pulley and the belt….voila no more whine. And to boot my gas mileage which had declined for a few months went right back up to where it had been.

 

Interesting that you found your MPG going back up after the work. Had a new SC and belt installed & ust took the MY2017 for a small road trip, north central Wisconsin to Munster IN. Mostly interstate speeds, at times 80mph, spirited ramp entries,, some bumper to bumper and some in town stop n go. 29 miles to the gallon, never would have expected that.

 

Some years ago, a number of owners (including me) determined that the trip computer is about 2mpg high. Don’t know if it’s better now.

My fuel gauge stopped working last year, so I’m always displaying trip A (miles since last fill up) rather than mileage.

 

That is exactly about the difference I see too. I've always been kind of **** about keeping track of my mileage and never trust any cars computer to tell me, since I think they all lie on purpose. I use an app on my iPhone called Fuelly and its very accurate.

 

Hello,

What is this sound reading material on both sides of the supercharger you're talking about? If you can circle on a picture or something that would really help. I have the problem that my whine is non existent even with intake cones installed from Mina gallery. The rep told me my symposer is the reason for the supercharger whine to be non existent so I am needing to check the tubes but I came across your reply and im curious and wanting to remove these sound materials to increase whine. Removing my engine cover did nothing so anything to get more whine without engine deprivation is something I'd like to do.

 

Sorry I don’t have any pictures of the before sound deadening material. I had them remove it because it was wet and not replace it so I don’t have anything I can show you. The material sits alongside the supercharger down near the connecting bolts as I understand it.