Discovery TD5 Exhaust modification

[Shamo]

Just thought i'd post up a little thread about what i did to my Disco last night when i got a little bit bored inbetween some other jobs i was doing on the car.

What i did was simply just take out the rear half of the exhaust system and cut out the rear muffler and replace it with a straight through piece of pipe (from an old d1 exhaust i had lying in the shed), this is a really easy modification to your exhaust that won't cost you much or even anything and makes your disco sound a bit tougher. It makes the turbo whistle alot louder and it just sounds a bit ballsier than it does with the muffler in but doesnt sound over the top ridiculous.

First up get your old exhaust for the source of pipe or buy some that is the same width as your current pipe (you wont need it flaired at the ends)

https://www.aulro.com/afvb/images/imported/2010/02/125.jpg

I used the longest piece of straight that i could find. I measured the length of the muffler in the disco that i was taking out and added 1cm each end, this gave me a rough length to cut.

https://www.aulro.com/afvb/images/imported/2010/02/356.jpg

Next step is to remove the rear half of the exhaust out of your disco and cut the rear muffler out as close as you can to the muffler its self on each end. The exhaust actually gets thinner each side of the muffler and if you cut close enough you can use the thiness for sliding the straight pipe over before you weld.

https://www.aulro.com/afvb/images/imported/2010/02/357.jpg

When i got to this stage, i put the whole lot back under the car but didnt bolt it in and just held it in place so i could ensure that the tip was straight out the back and marked it in the straight spot and then tacked it.

https://www.aulro.com/afvb/images/imported/2010/02/358.jpg

https://www.aulro.com/afvb/images/imported/2010/02/126.jpg

Welded... (not the tidiest but it doesnt matter under the car because noone can see it :D as long as it's strong!)

https://www.aulro.com/afvb/images/imported/2010/02/359.jpg

Then give it a coat of engine enamel for rust guarding (i used engine enamel over a usual rust guard paint because its better when it gets hot)

https://www.aulro.com/afvb/images/imported/2010/02/360.jpg

Then replace the exhaust in the original position and start it up and have a listen!

This is a video of mine, it doesn't really give it a whole lot of justice on the ballsyness sound but you can really hear the turbo whistle.

YouTube- IMG 0504

Cheers,
Shamo

[HBWC]

nice one i did the same to my tdi but left the resonator it made a huge difference on long large hills

[Tombie]

So you removed the centre muffler AND the resonator?

Or just the rear resonator?

[Shamo]

nice one i did the same to my tdi but left the resonator it made a huge difference on long large hills

I did the same with my old D1, it sounds awesome doesn't it :D


So you removed the centre muffler AND the resonator?

Or just the rear resonator?

Sorry my bad, i have been calling the resonator a muffler, i just removed the resonator, didn't want it to be that over the top loud.

Shamo

[Tombie]

Thanks for answering...

May I ask why you didnt go the other way?

Muffler out and Resonator in? The mufflers are so restrictive and the resonator is just a straight through.

Gives a performance increase (spooling time etc) and still legal...

[Shamo]

Thanks for answering...

May I ask why you didnt go the other way?

Muffler out and Resonator in? The mufflers are so restrictive and the resonator is just a straight through.

Gives a performance increase (spooling time etc) and still legal...

Because i have a mate who has taken his centre one out and it didn't make a huge difference (mind you it is a defender, i think they have a cat converter as well?) where as i also have a friend who has taken off the rear half (the resinator half) and it sounded quite nice so i just thought i'd do that, plus it was just an alot easier job to do since i was only just fiddling about and wasnt really planning on doing it haha

Shamo

[weeds]

i'm with tombie, i thought muffler first......well thats what i did

[Shamo]

Ah well i like it and it didnt take long and was easy to do

Shamo

[Tombie]

Ah well i like it and it didnt take long and was easy to do

Shamo

Shamo....

Thats cool mate, was just asking thats all.... :cool:

[Shamo]

Cool, well i'm hopefully heading to cruiser park in the next few weeks so no doubt i will have some video's of it up with the engine under load and what it sounds like!

Shamo

[M&S]

Thanks for sharing. I like free ideas :D

I have been thinking I'll remove the cat at some point as I've read it helps a lot with the turbo lag/spooling.

Personally I'm not sure I like the turbo whistling sound myself, but that's just me :(

[Naks]

What i did was simply just take out the rear half of the exhaust system and cut out the rear muffler and replace it with a straight through piece of pipe (from an old d1 exhaust i had lying in the shed)


:thumbsup:

bang for buck, this is the best mod for any TD vehicle. On the Td5 it make a big difference in reducing turbo lag and EGT.

[Tombie]

:thumbsup:

bang for buck, this is the best mod for any TD vehicle. On the Td5 it make a big difference in reducing turbo lag and EGT.

Naks, he's done a "Sound Mod" not the muffler mod...;)

There wont be a noticeable difference in EGT or spool time.

He's just made it sound nicer for him :cool:

[Naks]

Naks, he's done a "Sound Mod" not the muffler mod...;)

well, that's just a waste of time :D

When I removed the middle silencer from my D2, children ran away scared when I floored it at the lights :twisted:

[Dutchie10]

Naks, he's done a "Sound Mod" not the muffler mod...;)

There wont be a noticeable difference in EGT or spool time.

He's just made it sound nicer for him :cool:

Tombie,

What sort of improvment are we talking about,
i have a TD5 Defender and i have been looking at removing the muffler (Centre) but was unsure due to actual improvment that i would expect.

[Shamo]

Tombie,

What sort of improvment are we talking about,
i have a TD5 Defender and i have been looking at removing the muffler (Centre) but was unsure due to actual improvment that i would expect.

I'm not sure if it makes as much for the fender as they have a cat converter also and the disco's don't... but i could be wrong, i know that it hardly makes and difference to sound.

Also for all, since i have been driving it with the new exhaust, i think it has actually made the spool a tad better.

Shamo

[Tombie]

I'm not sure if it makes as much for the fender as they have a cat converter also and the disco's don't...

Not true...

Getting a Cat vehicle was dependant on the build day... I've even seen new 04 vehicles without Cats....

Cats muffle it like mad...

Non Cat vehicles are sweet! A nice growl....

[Dutchie10]

True Tombie2,
As i dont have a cat converter in mine:D, so the orginal question still stands what performance improvment is expected?

Cheers

Dutchie10

[Tombie]

True Tombie2,
As I don't have a cat converter in mine:D, so the original question still stands what performance improvement is expected?

Cheers

Dutchie10

Marginal improvement in spool up time and associated throttle response improvement.

Marginal fuel economy improvement is possible (depends on how u drive)

Great Aural improvement :)

[Dutchie10]

Marginal improvement in spool up time and associated throttle response improvement.

Marginal fuel economy improvement is possible (depends on how u drive)

Great Aural improvement :)

Thanks for that,

Sounds like a mod i have to do once i finish the Dual Cab conversation this weekend:D Waiting on the rain to stop as so i can do the spray job.

Cheers

Dutchie10

[stig0000]

oi shamo you sead mine dident make much diff taken the center out,(witch it dident),, look on my face book now man,,, lol,,, i made a slight change to my sys:D:D

[Shamo]

Took it all out today and had a bit of fun driving around the uni in st lucia, everyone looks when your loud!

YouTube- 001.MOV

Shamo :D