Beats me, man. I've never seen one myself.

 

My misunderstanding. When you said "semi active valve" I thought you had an XKR. I didn't realize that the XK exhaust was semi-active, and though it was a standard-type fixed exhaust.

Disregard my posts about Fuse 19 because the XK doesn't have it.

 

There seems to be confusion between the rear section SAM (Semi Active Muffler Valve) on the N/A and the Active Exhaust valves on the S/C:

NATURALLY ASPIRATED




SUPERCHARGED


The SAM is simply a spring loaded valve that opens under pressure. The active exhaust has:
1. vacuum pump
2. solenoid valve
3. reservoir
4. pipes incorporating a restrictor and a check valve.

The active exhaust can, as several members already know, be set permanently open by removal of the associated fuse. There is no external control, physical or electrical for the SAM.

Graham

 

Removing the valves could adversely affect the proper functioning of the engine Lack of torque at low speeds noted on the xkr remove the fuse 19Removing the valves could adversely affect the proper functioning of the engine Lack of torque at low speeds see on the xkr remove fuse 19 according to a forumer I will not take this risk

 

Literally dozens of Members have removed fuse 19 and every case I have read, they have been delighted with the results (me included). I am sure if it caused engine issues, some of the more knowledgeable Members would have reported these. I didn't notice any differences, other than increased exhaust noise, when I removed fuse 19, although my mpg did drop. But this was probably down to me accelerating hard whenever I got the chance just so I could hear the louder exhaust note!

I have since replaced the whole back box with an aftermarket exhaust system which is lighter, has bigger tail pipes and makes a noise more like an Aston Martin, but does not drone at cruising speeds. Fuse 19 is still out, but it would serve no purpose now anyway, as the new exhaust has no valves and is 'noisy' all the time.

 

I have a remote control for fuse 19 and cannot feel any loss of torque between valve open and valve closed.
The only noticeable difference is the added growl from the rear when accelerating, particularly around town at lower speeds and on down shifts.

 

[QUOTE = paulgorringe; 2307865] J'ai une télécommande pour le fusible 19 et je ne ressens aucune perte de couple entre la vanne ouverte et la vanne fermée.
La seule différence notable est le grognement supplémentaire de l'arrière lors de l'accélération, en particulier en ville à basse vitesse et lors des rétrogradations. [/ QUOTE]
Maybe a low revs xkr seen that there is a turbo that recently? I will ask jaguar and I will give you a feedback, this is an info that was reported to me and some people forum we changed the lines and we felt a loss

 

It would be far more productive to the OP if those with R’s stop talking out of their R’se about fuse 19. The OP has a N/A XK and therefore fuse 19 plays no part in what he is trying to achieve.

 

Then maybe the OP shouldn't have brought up the topic of fuse 19 himself, as you can see above.

 

Perhaps you should try reading from the beginning.

 

Thank you for your valuable insights, which I do appreciate.

 

You’re welcome.

 

I think I'm about to blow a fuse.

Graham

 

Is it #19?

 

Stop this silly arguing. My post #22, above, already pointed out this misunderstanding.

 

Hi it is possible as I have done it although not fitted back yet as I need to put the lid back, I also covered the holes inside the exhaust with foil and exhaust heat tape

Valve stem visible secured with tie wraps to not fall back in.

Inside back box valve in fully open position.

Looks nothing like diagram of XKR box, note left pipe feeds right exhaust tip and right feeds the left tip

Holes covered

Valve stem visible

 

Is that “covering over the holes” actually going to hold?
As you have the back box open anyways, why not just replace the piping?
Or better yet, just put the box on the shelf and put some pipes on??

 

Hi I have more pics to follow, I have wrapped the pipes wth an additional heat resistant exhaust wrap secured with metal tie wraps, the reason I have done this is because I have replaced my exhaust with another identical one as the one pictured failed me as the valve was rattling around at low rpm so I picked up a back box an XKR centre section and valance for £25 on eBay so rather than throw it away I thought I'd try the M3 mod just see how it sounds, total cost with mates rates on the welding £30, it's really experimental and £350 cheaper than having one made, I will upload pics and video when fitted, PS I don't know where you would use heavy gauge wire to keep valves open as you have to destroy the unit, it will not come out so I'll just weld mine in and if it's too loud just swap it back 👍

 

Richardnero1, let's have an update. How did the exhaust valve mod affect the sound, drone?

 

He's not been active for over two years, don't expect an answer.