It would. As to knowledge, reading is one of the joys of retirement!
As to listening to experts, nobody is entirely immune from snake oil, and if you want to have a different exhaust, I say do it and tell us all about it.
Confession time: I always used to put some stuff in my oil called "Oil Extreme". Now I am intellectually convinced that these additives do nothing; but I bought some at the racing car show one year, drove halfway home so the car was really warmed up, had her ticking over in the service station and poured it in. The valve train chatter (what little there is on a V12 at tickover) just disappeared. The Management was with me and she was amazed at the difference. At really high revs the valve train was far quieter as well. So I believe in the stuff and always added it, and would now but I cannot get it anymore. So what does that tell you?
Good luck with the mod.
Greg

 

i had a problem with my wifes transmission shifting bad and sticking in some gears!

so i tried a bottle of some transmission MAGIC, to my amazement after a day or so, it cleared up and has been perfect for over year!

go figure?

 

You cannot compare V8 to V12, X pipe or H pipe used in V8 applications for improved scavenging due to uneven bank firing but that does not apply to V12.
A V12 will never sound like a V8 and vica versa.
As l mentioned, l have no centre mufflers on my 6 litre and run 2.25 pipes straight through to the stock resonators at the back, still quiet in my opinion at anything less than a planted right foot. Windows up cannot hear it inside and no drone at highway speed.

 

Cheers Baxter.

Yes I have learn't since you are quite right so I actually might just go for straight through instead of X pipe....save the money.

Thanks again for all the input. Got some re planning to do.

 

It's not the best recording and it sounds a lot better in real life; the clattering at the end is the washing line pole that I was pressing the accelerator with, falling out.

 

when I had my mid mufflers removed and my cats emptied the drone at highway speeds was unbearable in the cabin. Putting in a "H" pipe just aft of the trans resolved that.

 

No cats on mine and downpipes never had provision for them. I mention that because l have an HSE range rover on which l did gut the cats and l believe the empty chamber left behind after gutting makes a big difference verses just a pipe.

 

I don't actually have any pictures of these installed on the car, it was late by the time we got it done and I had to get off of the lift. But I put electric cutouts on my car, and they work great. I put them in the center between the two pipes, after the cats but before the mufflers. I love the sound, but that's just me. I think it gives it the best of both worlds; somewhat obnoxious or as quiet as stock with the 2 second push of a rocker switch.



I cut out a length of pipe, these Y pipes fit right over the ends, and then I used clamps to tighten everything back up. The plan is to weld it eventually but I wanted to make sure it would ride around decently how it is (without sacrificing too much ground clearance) before I glued it all together. No problems so far, and I absolutely love the sound. I'll try to get some pictures/sound clip for you soon.

 

Looking forward to the pics and video

 

Check this out:


From the website:

Starting on Monday, the Targa Tasmania will run for 6 days. The only Jaguar entered in the full competition category is an XJS that belongs to Mark Hammond from Orange NSW. Just in case you have never heard this weapon before, check this out


NOTE: Heavily modified. Not for the purist at heart

 

I LOVE IT

 

I've seen that video many times. I should have thought to post it. I absolutely LOVE the sound of that car!

 

Well...I feel a little silly...

I just got home from being out in the middle of the ocean for 1 month (where I devised my exhaust plans) only to come home a few days ago and see that my mufflers have already been deleted and straight pipe put through!

So at least that is done however they look like stock resonators and the pipe appears to be standard:

approximately 40mm inside diameter is about 1 1/2 inches. Is that how you work out what your pipe size currently is?

 

From the other sunny state at the other end... and just out of curiosity, can you actually do all that in Florida, aaah...legally? Heck, fat chance to do that here in Cal. With no muffler and down pipes it will never pass; then if you add no cats I don't know if the'd confiscate the car or you go straight to jail, not sure...

Jokes aside, and just as a reference because mine's not a V12 ('94 AJ6) I got installed new Magnaflow what they call straight through "free flow" mid silencers and rear mufflers, which have no baffling inside at all and this did mildly increase the exhaust sound; not quite as beautiful as my V8 Jag, but very pleasant in a different fashion. Then, when I installed the 3" Borla tips, the short pipes after the rear mufflers were replaced with 3" pipes as to match the 3" tips, but I've never changed any of the other pipes.

Cheers,

 

Bro

From what I can tell from those Photos, you still have the rear Silencers in place (as I was expecting)

But are there any other Silencers, in place of where it says 'Lukey' on your diagram, or are those rear Silencers the only ones on your System.

 

Yeah thats right OB. They are the only ones.

I climbed underneath and had a look. All i have is the rear silencers. Nothing in the middle at all. Looks like they took the mid mufflers out ages ago. Pipe is still small though really 1 1/2" so I guess it was only a minor upgrade to the exhaust back who knows when.

 

here is my pipe , one single 5" diameter outlet, all 12 cylinders exit out one pipe!

very unusual smooth sound, and screams to a whine as RPM rises!

 

I can just hear it now.
I have a '76 coupe future project in the shed with just the engine pipes fitted. Move it around on property occasionally, sounds great and no close neighbours to worry about, but on the street would be like waving a red flag at a bull around here.

 

That is awesome! I don't own a V12, but this is, albeit modified as it is, really striking. It makes me think (and this may be material for a new thread) about how a modified XJS deserves to have a place in this car enthusiasts world, meaning there's no right to rate them with disdain as if what they do is wrong because a machine is not stock. One thing that I can clearly see is the apparent superior enthusiasm for performance of XJS/Jaguar owners Down Under than those from our good ol' US of A.

Once again, awesome machine...an aggressive racing XJS...what a concept.

Cheers,

 

amen to that idea , a site for modified jaguars!