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bear100

Member Since: 22 Mar 2010
Location: South Wales
Posts: 1913

2010 Defender 110 Puma 2.4 USW Santorini Black

Stainless exhaust decat worth the mod?

Speaking to one of the traders at billing about stainless exhausts, and he claimed a a full 110 puma with decat would give a nice sound and would feel a lot better, I have looked on YouTube (sad I know) and have found a couple that give a type of turbo dump valve noise, what causes this?

I have a remapped 2.4 110

Is it worth the £500 for the upgrade? 2016 Range Rover Autobiography 4.4 TDV8
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)

2nd Aug 2016 8:42pm

1978

Member Since: 04 Aug 2015
Location: Lancashire
Posts: 519

I have the TD5 version of the flatdog stainless steel decat pipe and it's made a positive difference to both noise and responsiveness. Much less than £500 if a decat is all your after:

http://www.flatdoguk.com/de-cat---puma-tdci~266

Hope that helps.

2nd Aug 2016 9:45pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey

An answer I posted from an intercooler thread of yours......but at £500 I would say definitely not for that price!

K9F wrote:
A decat in my opinion was the cheapest option for the most significant engine performance gain available. Decats still sell and current legislation is a visual check only for the presence of one. A catalytic convertor strangles the breath out of your engine, removing it allows the turbo to spool up quicker. For the average user to achieve noticeable gains a decat is still in my own opinion the cheapest and best option by far. Final choice however is really up to the individual.

http://www.defender2.net/forum/topic26633.html?highlight=cat

An intercooler will not provide power gain but will compliment a remap perfectly reducing operating temperatures of your engine which is a good thing!

If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

2nd Aug 2016 10:51pm

bear100

Member Since: 22 Mar 2010
Location: South Wales
Posts: 1913

Thanks, the £500 is for a full exhaust, which is the quandary I have,
Option 1 fit decat pipe or option 2 full exhaust? 2016 Range Rover Autobiography 4.4 TDV8
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)

3rd Aug 2016 8:24am

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

Option 3..... contact James Beard the 'horse dentist' (do a search on the forum using 'horse dentist') of Griffin. There are numerous members that have one of his stainless systems fitted (myself included) and it cost nowhere near the £500 you mention and has a no quibble lifetime guarantee. I will 'pm' you his mobile phone number and you can discuss directly with him your requirements! (If the number is still good?)

http://www.griffinperformance.co.uk/ If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

3rd Aug 2016 9:05am

bear100

Member Since: 22 Mar 2010
Location: South Wales
Posts: 1913

Cheers K9

did you have the dummy cat fitted? and have you noticed the difference? 2016 Range Rover Autobiography 4.4 TDV8
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)

3rd Aug 2016 9:53am

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

I designed and got my own 'cat' made up in stainless and welded it onto the decat pipe in the same position the TD5 cats are sat. No mither since.

Click image to enlarge

Click image to enlarge If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

3rd Aug 2016 11:36am

v8steve

Member Since: 18 Apr 2011
Location: dumfries scotland
Posts: 195

2007 Defender 110 Puma 2.4 XS CSW Rimini Red

got a full griffin system for my 110 delivered today. with a dummy cat and straight through middle box. can't wait to get it fitted on saturday.

110 xs s/wagon
s3 swb soft top

3rd Aug 2016 5:55pm

bear100

Member Since: 22 Mar 2010
Location: South Wales
Posts: 1913

let me know how you get on steve! have you got a 2.4? will it make that whoosh sound when you change gear? 2016 Range Rover Autobiography 4.4 TDV8
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)

3rd Aug 2016 6:38pm

Dieselhead

Member Since: 21 Oct 2012
Location: Pulborough. West Sussex
Posts: 552

I have that woosh when you change gear

Just got a decat brit part (yes I know but what can go wrong with that)

No centre box

Sounds like Darth Vada up the pipe. Want to find a tunnel

Yes it does help the MPG

Chris

2008 XS 110 2.4 Utility. Tonga Green
1953 Series 1 for restoration
1983 Mini Mayfair
2004 VW T5 Camper
2008 Diahatsu Sirion. Thats hers
Classic Bolens Garden Tractors

3rd Aug 2016 6:49pm

v8steve

Member Since: 18 Apr 2011
Location: dumfries scotland
Posts: 195

will do + yes 2.4

110 xs s/wagon
s3 swb soft top

3rd Aug 2016 7:49pm

Cold_n_Wet

Member Since: 15 Oct 2012
Location: Bergen
Posts: 244

I had a decat on the 2,4, with no middle box either, I didnt like the sound of the turbo over run so im building back to standard.

The Decat may go on again with the middle and rear boxes at a later stage "Rafiki" 2007 110 STW - Rolling rebuild.

3rd Aug 2016 7:51pm

Pickles

Member Since: 26 May 2013
Location: Melbourne
Posts: 3782

2013 Defender 90 Puma 2.2 CSW Keswick Green

Not saying a "De-cat" exhaust won't look & sound nice,...will probably make you feel good too, but I would suggest that any actual performance gains will be minimal, if any,...the "bum dyno" sometimes does not tell the true story.
Not familiar with your "laws", but don't you guys have a yearly "M.O.T." or something like that to pass yearly?
Pickles.

3rd Aug 2016 10:10pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

Yes we do have MOTs Pickles and there is loads of information readily available about decat and MOT if you are that interested and care to look. It is a well proven and documented fact that the turbo spools up quicker once the cat has been removed. As a result there are the associated increased gains to be had at an earlier stage.

Pickles wrote:
...... but I would suggest that any actual performance gains will be minimal, if any,...the "bum dyno" sometimes does not tell the true story.....

May I ask what are you basing your 'suggestion' on please? Pete or Gary could undoubtedly expand further?

bell-auto-services wrote:
If you are keeping the car in standard tune the Decat front section is the best bet for the first exhaust mods. This will help with turbo spool and free up the breathing of the engine. Regards Pete.

If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

4th Aug 2016 2:31am

Pickles

Member Since: 26 May 2013
Location: Melbourne
Posts: 3782

Explain?...Not a problem, I don't need to, I'm simply giving my opinion, on this "exhaust only" mod.
HOWEVER, if the guy proposing to do this mod, is agreeable to a "before & after" run on the rollers, providing power & torque readings, WITH NO OTHER MODS, he may find that I'm not too far off the mark.
That is the only true way to establish the FACTS. Dyno reading graphs showing power & torque throughout the rpm range,..and like I said, for the car to be in IDENTICAL tune/condition, before & after.
That is the only true way to establish any power gains.
What happens with the M.O.T., if the decat was found to be removed?
Pickles.

4th Aug 2016 3:20am

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