The torsion isolator, also called the supercharger coupler, is a relatively common problem on the Eaton TVS R series supercharger. The internal spring wears a groove in the plastic casing, and then the spring rattles especially at idle, so the top of the engine sounds like a can of marbles rattling around. I have had mine replaced under warranty.
See here: How to replace an Eaton Supercharger Coupler : SuperchargersOnline, Worlds largest Supercharger Resource. Get Serious About Power

 

Our LR4 340 hp engine makes a type of rattling sound at idle. Is the TVS (2015) on the 6 cylinder version of Landrovers? At what mileage was yours replaced? What this on your f type?

 

I would love to go to car meets more often, but I don't know where to get info on meetups that are occurring in the area.

 

On my F-Type S, and the exact same motor and supercharger as your LR4 other than the tune.
The warranty fix involved changing the whole snout over for a new one (in which the coupler sits) and it was done at roughly 22,000 miles although the excessive rattle at idle had been evident from well before then.
The dealer initially diagnosed the rattle as a faulty SC belt tensioner and replaced the tensioner under warranty but that made no difference at all, so they then agreed with my diagnosis of a worn SC coupler.
My engine still rattles a fair bit when cold but it's much better once warmed up and this is reportedly "normal" for the SC V6, there is another thread around here somewhere about it.

 

Well Stuart is smart as always. Installed the 200-cell back on to the R with the Valvetronic V8 Exhaust and its waaayyyyyy louder than I expected. Surpassed my expectations of loud. Going to go back to stock exhaust and find another way to increase the volume without going to insane mode.

 

When you added the 200 cell cats did you also do software upgrade ?

 

Was it loud inside the cabin or outside the car or both? And was it loud at all times or just at WOT? Just so we can all get a better understanding of this setup.

 

Yes I installed the tune for the 200 cell cats.

Loud outside, inside, deep in your soul. Ear drum shattering loud on WOT. No microphone I have can capture it. If you drive civilized and keep the RPM under I say 3k no cop will arrest you.

I have a Decibal meter. I'll try to get some readings tonight. I'll try to record some sound clips inside and outside

In slow moving traffic I love it but when I need to do any major acceleration I have to brace myself.

 

Thank you for letting me know about the need for software.

 

DB measurements (max): revving
valvetronic + 200 cell

Right outside the car in rear (open + 200 cell, 5K): 114.6db
Right outside the car in rear (closed + 200 cell, 3K): 94.1db
Inside the cabin windows up vert' (open + 200 cell, 5K): 97.6db
Inside the cabin windows up vert' (closed + 200 cell, 3K): 80.6db

 

[QUOTE=zmoothg;1721493]DB measurements (max): revving
valvetronic + 200 cell

Right outside the car in rear (open + 200 cell, 5K): 114.6db



That is just about at the human hearing pain threshold.

 

Yeah I'm going to keep them on for a week and see how I feel at the end of it. Once the cats get warm it's actually pretty beautiful. I will try my best today to get some clips before I head out of town for a few days for those special people who are interested in bumping up the volume.

 

Please! Let's hear it!

 

Put this together quickly.

0:00 Lukewarm Start
0:24 Closed Valve Rev (Outside Car)
0:46 Open Valve Rev (Outside Car)
1:12 Flybys
3:06 Sounds from Inside Car Open Valves
3:29 Inside Car Driving - 80% WOT

 

Just finished up for a forum member - heading to the UK with custom black ceramic coated tips. Valvetronic for V6. So this is for you guys that want to have a LOUD option without doing downpipes/cats. Works with the stock valve control.

Some more pics here:

 

Just saw this earlier on your Instagram page. Essentially it is a muffler delete with the valves open which is LOUD (Similar to what I was running). However the nice part about this VAP system is that with the valves closed, the muffler should tone it down a bit for regular driving. Great design Stuart!

 

Stuart this looks amazing and I' rather excited to get it fitted to my car, thanks for sharing!!
ive been raving about it on insta, Facebook and the f type forums

 

Very similar to the V8 Valvetronic design, will be loud. With the 200-cell downpipes it will be insane (but it grows on you, but not my neighbors). Love the black tips considering doing the same on mine.

 

I've been thinking... I wonder if it's possible to change the behavior of the "active" exhaust.

I have an R and running the 200 cell cats from VAP amongst other things, and always drive in dynamic. Now when I say they car is stupid loud its an understatement... I've been wanting to get a valved system from vap, but thinking about it, it's still going to be the same with the valves open.

So it brings me to what I've been pondering, as I mentioned above. I wonder if it's possible for vap to change the operation of the active exhaust so that its only controlled from the button inside the car.

Right now for example, I can hit the button and the valves close, however between 3-4K they open any way and all hell breaks loose...

 

It would be cool if VAP can come up with a software solution. In order to solve the problem you mentioned. I installed a separate vacuum system for the exhaust, but connected the power on and off to the interior active exhaust button. I basically followed this guys implementation: https://www.corvetteforum.com/forums...ne-intake.html

Now closed means close all the time and open means open all the time.