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scatt

Member Since: 24 Aug 2009
Location: nottingham
Posts: 103

2008 Defender 110 Puma 2.4 DCPU Alpine White

de-cat pipe / straight through exhaust

Has anyone tried or runs a de-cat pipe on there puma, thinking about a straight through exhaust for a tastier engine note!! dont really think it will have any major effects on performance. and i know that ive got to take the crossmember out to change it.

what are your thoughts????? should it stay or should it go??

10th Nov 2009 9:43pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8221

2011 Defender 110 Puma 2.4 USW Stornoway Grey

i was under the impression - think i read it on here, that the turbo needs some back pressure from box(es) or Cat to run at optimum.

i am also thinking of a straight through system Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

10th Nov 2009 9:57pm

AndrewS

Member Since: 10 Apr 2007
Location: Hereford
Posts: 3709

2013 Defender 130 Puma 2.2 SW Rimini Red

I removed the centre box, that gives a deeper note. I have removed the decat on the utility but found no improvement. I think that the engine/turbo requires a bit of resistance in the exhaust to get the turbo to work properly. It needs some back pressure type thing.

10th Nov 2009 9:57pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8221

Andrew - was that centre box and cat removed on the utility or cat on the utility and box on the SW? Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

10th Nov 2009 10:02pm

scatt

Member Since: 24 Aug 2009
Location: nottingham
Posts: 103

this sounds really cool, im presuming that its straight through.

10th Nov 2009 11:04pm

Verdone

Member Since: 30 Apr 2008
Location: Gent
Posts: 67

Ive got a decat and centre box removed makes a nice sound but not like the youtube vid i think thats with the last muffler removed aswell

10th Nov 2009 11:42pm

scatt

Member Since: 24 Aug 2009
Location: nottingham
Posts: 103

Verdone wrote:
Ive got a decat and centre box removed makes a nice sound but not like the youtube vid i think thats with the last muffler removed aswell

you wouldnt happen to have a vid of it, running. i would love to here the sound it makes.

10th Nov 2009 11:58pm

MrFlips

Member Since: 27 May 2009
Location: Cardiff
Posts: 682

2008 Defender 90 Puma 2.4 PU Santorini Black

scatt wrote:
this sounds really cool, im presuming that its straight through.

This one was prepared by Twisted Performance, and as far as I know uses their Tornado exhaust. Soon as my warranty runs out I'm fitting one to mine. Peter
2008 SWB Truck Cab
1952 80" Soft top

11th Nov 2009 12:11am

Defender SVX

Member Since: 29 Jan 2009
Location: Co Durham
Posts: 730

2008 Defender 90 Puma 2.4 SVX Soft Top Santorini Black

We've got the Twisted Perormance de-cat system on the 110 dcpu and that sounds great especially with the re-map

I've also recentlly fitted the Twisted system to the SVX but I've only been a couple of miles since but it seems louder and a little nippier but not really tested. Also air filter and re-map soon

Formerly mao99999
16 Focus RS Nitrous Blue.
11 FFRR TDV8 Vouge SE Black Black.
08 DEFENDER SVX SOFT TOP (SUPERB)
08 DEFENDER 110 DCPU Stornoway grey (Overland Exploration Unit)
05 Fiesta ST 150 Van
04 Jaguar XKR 4.2 Supercharged V8
02 DEFENDER 90 TD5 (next years soft top project)
95 DEFENDER 110 CSW 300 TDi Phoenix black
95 DEFENDER 90 HT Monti Carlo blue COUNTY 300 TDi
67 109" SERIES 2a TUNED 200 TDI
64 DAVID BROWN 990 rat look
55 86" SERIES 1

11th Nov 2009 6:37am

AndrewS

Member Since: 10 Apr 2007
Location: Hereford
Posts: 3709

jst wrote:
Andrew - was that centre box and cat removed on the utility or cat on the utility and box on the SW?

Utility had decat pipe and centre box removed
CSW has centre box removed.

11th Nov 2009 11:45am

scatt

Member Since: 24 Aug 2009
Location: nottingham
Posts: 103

mao99999 wrote:
We've got the Twisted Perormance de-cat system on the 110 dcpu and that sounds great especially with the re-map I've also recentlly fitted the Twisted system to the SVX but I've only been a couple of miles since but it seems louder and a little nippier but not really tested. Also air filter and re-map soon

is your system on the dcpu a standard exit or is it side exit??

11th Nov 2009 9:32pm

Bogblaster

Member Since: 04 Jun 2007
Location: Glawstershire
Posts: 119

2016 Defender 90 Puma 2.2 Adventure Corris Grey

I have the BAS de-cat and middle box removal, it is a touch loud, especially with the BAS tune. One thing Pete did say though, was "Turbo diesels don't need back pressure, only petrols"

I recently had the software updated on my 90 and when Pete re-mapped it again the noise was notably louder.

Would I de-cat it again? Yes
Would I remove the middle box? Only if Pete made a smaller one!

The noise is chuffing loud on long journeys! PM Pete, I am sure he was working on a smaller middle box, for an improved, but not really loud sound.

BB 2019 MY Disco 5 HSE Lux
Audi A4 Avant 3.0L TDI Quattro - WOW
2016 90 Adventure

11th Nov 2009 11:24pm

Defender SVX

Member Since: 29 Jan 2009
Location: Co Durham
Posts: 730

scatt wrote:
mao99999 wrote:
We've got the Twisted Perormance de-cat system on the 110 dcpu and that sounds great especially with the re-map I've also recentlly fitted the Twisted system to the SVX but I've only been a couple of miles since but it seems louder and a little nippier but not really tested. Also air filter and re-map soon

is your system on the dcpu a standard exit or is it side exit??

Both standard exit but the 90s is a slightly larger tail pipe

12th Nov 2009 6:44am

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