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Author Subject: Peugeot Sport Decat System to fit
Day666

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Location: Bristol

Registered: 20 Apr 2013

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Post #1
It was far to good a price to turn down ...god knows who made it ...one of many ???

Running AT mo a Original Peugeot Cat & 2"stainless cat back two box system runs at 83db at Combe testing !!

Bought a full stainless steel 2nd hand Peugeot sport looks big (2.5 from 1/2 way down decat right through to the end of the tailpipe ) complete system with two silencers & has decat pipe & I got it for a great price & I'm thinking about fitting it to my stnd engine 6 ????
Problem is I'm being told I will may lose some mid range but gain at top end ?
Been told a standard NA 6 likes back pressure ?

If it's going to cause probs then I'll hold on to it until the charger comes ?

The maxi car it came off of was bodies & cammed & made 98db

Anybody tried this ??????
Posted 12th Apr 2015 at 21:17
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adam b

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Location: The Nam

Registered: 24 Jan 2006

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Post #2
Photo might help... There are a few PS exhaust systems.

I'm using a skid plated PS magnex 2.25" on mine with a proper decat pipe (can't remember the make). 87db static at 4.5k combe

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Nothing to see here
Posted 12th Apr 2015 at 21:36
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Day666

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Location: Bristol

Registered: 20 Apr 2013

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Post #3
adam b wrote:
Photo might help... There are a few PS exhaust systems.

I'm using a skid plated PS magnex 2.25" on mine with a proper decat pipe (can't remember the make). 87db static at 4.5k combe


The decat pipe looks professional ....only got tailpipe pick at mo ...take some pics tomorrow !!!
100% 2.5
Posted 12th Apr 2015 at 21:45
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

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Post #4
no engine likes "backpressure", what you need is a bore that matches the gas speeds and pulse tuning, which in effect will give much lower "backpressure" if you get it right, go too small and you get massive restriction, go too large and the gas speeds plummet too quickly and will only make power really high in the revs.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 12th Apr 2015 at 21:49
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #5
oh yeh, PICHERS!

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 12th Apr 2015 at 21:49
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Day666

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Location: Bristol

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Post #6
Get some tomorrow Adam / Mei !
Only have this one on my phone of the tailpipe NOT much help Thumbs down

Really well made though ...braced etc I've not seen a better made Stainless exhaust !

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Posted 12th Apr 2015 at 22:30
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eddy_gti6

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Location: Durham

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Post #7
I ran a 2.25" straight through middle section with decat and a scorpion back box, to be honest i would say its the best exhaust i have had on any 6 i have owned. The 2.5" magnex with the maniflow manifold, cams and VLR inlet on my nile was a good exhaust too but that was only because of the mods. I have a 2.5" magnex on my rallye now and i hate it.

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Posted 12th Apr 2015 at 22:53
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Day666

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Post #8
eddy_gti6 wrote:
I ran a 2.25" straight through middle section with decat and a scorpion back box, to be honest i would say its the best exhaust i have had on any 6 i have owned. The 2.5" magnex with the maniflow manifold, cams and VLR inlet on my nile was a good exhaust too but that was only because of the mods. I have a 2.5" magnex on my rallye now and i hate it.


You only had One silencer box on back box ?....how loud was that ?

Your Magnex now does that have two silencer boxes = one in middle section ?
Both mine do inc the new one but one on the car now has three boxes inc the cat / middle box & back box
Posted 12th Apr 2015 at 23:01
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eddy_gti6

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Post #9
Yes my astor only had a scorpion back box. Noise was 96db at croft and 86db at donnington park some how? My magnex on the rallye has both moddle and back box

This is the exhaust off my astor


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Posted 12th Apr 2015 at 23:04
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superchargedblack1997gti6

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Location: guildford

Registered: 15 Aug 2009

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Post #10
Heat wrap is a good way of lowering db levels don't ask me why but have seen this on a few exhausts of mine

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Super high boost Completed, destroyer of gearboxes and 160mph club
Posted 12th Apr 2015 at 23:13
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adam b

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Post #11
Reduces resonance? Mine is a two box system, old style one...

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Posted 12th Apr 2015 at 23:15
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burnout21

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Location: Edge of the Pass

Registered: 23 Apr 2008

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Post #12
Had a Scorpion 2.25 myself Eddy, Magnex decat. Sounded a lot better than the Miltek system got now. Just the right tone without being Too Chavey. Got it 2nd for about £50 just needed the back box re packing.
Posted 13th Apr 2015 at 10:12
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RetroPug

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Location: Leicestershire

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Post #13
Day666 wrote:
eddy_gti6 wrote:
I ran a 2.25" straight through middle section with decat and a scorpion back box, to be honest i would say its the best exhaust i have had on any 6 i have owned. The 2.5" magnex with the maniflow manifold, cams and VLR inlet on my nile was a good exhaust too but that was only because of the mods. I have a 2.5" magnex on my rallye now and i hate it.


You only had One silencer box on back box ?....how loud was that ?

Your Magnex now does that have two silencer boxes = one in middle section ?
Both mine do inc the new one but one on the car now has three boxes inc the cat / middle box & back box


I have the same exhaust but with a cat still in place. Also, my middle section is stainless.

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61k miles Ph.1 Diablo '6 Project Thread
Posted 13th Apr 2015 at 12:21
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Day666

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Post #14
Decat ! This is mild steel I believe ..taken lamba plug out & ordered new one Thumbs up

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Posted 13th Apr 2015 at 21:21
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Day666

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Post #15
Middle section make ? 2.5

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Posted 13th Apr 2015 at 21:18
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Day666

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Post #16
Back box

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Posted 13th Apr 2015 at 21:07
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Day666

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Location: Bristol

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Post #17
Birds eye view

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Posted 13th Apr 2015 at 21:12
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adam b

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Post #18
That's an old style PS magnex same as mine. Bodged decat from a standard downpipe.

They used to be worth quite a bit, gain power and decent weight loss

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Posted 13th Apr 2015 at 21:44
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Day666

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Location: Bristol

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Post #19
adam b wrote:
That's an old style PS magnex same as mine. Bodged decat from a standard downpipe.

They used to be worth quite a bit, gain power and decent weight loss


So worth fitting ?
Is the decat ok then ???
Posted 13th Apr 2015 at 22:21
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eddy_gti6

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Post #20
Yeah my middle section was stainless too retropug. Sounded awesome. Wouldnt mind another one.

What system you got on at the minute day666? Decat pipe will be fine, does the same job as any other decat, looks like its been done quite well

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Posted 13th Apr 2015 at 22:39
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Day666

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Location: Bristol

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Post #21
eddy_gti6 wrote:
Yeah my middle section was stainless too retropug. Sounded awesome. Wouldnt mind another one.

What system you got on at the minute day666? Decat pipe will be fine, does the same job as any other decat, looks like its been done quite well


Chris got a standard OE Cat plus a stainless twin box including back box 2" made up stainless system !
Posted 13th Apr 2015 at 22:50
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eddy_gti6

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Post #22
Stick the decat on take the car out for a good run, go home stick the magnex on and do the same again and just see what one feels and sounds the best for you. Decat does nake a good difference to sound and performance

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Posted 13th Apr 2015 at 22:55
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Chr1sch

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Post #23
I also have an old PS Magnex system on mine - word of warning i fitted a decat and it made it crazily loud - very aggressive top end pull though which was nice on track but made it slow at the bottom of the rev range.

I've read the decat effectively moves the torque curve - driveability wise it was worse, but lots of fun from 4-7k
Posted 17th Apr 2015 at 10:05
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Day666

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Location: Bristol

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Post #24
Chr1sch wrote:
I also have an old PS Magnex system on mine - word of warning i fitted a decat and it made it crazily loud - very aggressive top end pull though which was nice on track but made it slow at the bottom of the rev range.

I've read the decat effectively moves the torque curve - driveability wise it was worse, but lots of fun from 4-7k


2.5 twin box Magnex ?
Posted 17th Apr 2015 at 11:08
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Day666

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Location: Bristol

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Post #25
Bought off local dealer Gen Lamba for £102.00 discount price was superseded part no to this one but has data sheet saying wires far to long ...1.5 metre in length ...can put Lamba on pipe on the floor & still have enough cable Crazy
I think cable ties are going to be needed ?

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Posted 17th Jun 2015 at 20:56
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