Post #1
Got a Decat and a magnex system on the rallye and it sounds really raspy around the Decat area. Is it likely to be a blow causing the rasp or is it the Decat? Would heat wrapping it make a difference?
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displaying posts 1 to 9 of 9
| Author | Subject: Raspy! |
 Matt_rallye
Regular  Location: Bournemouth Registered: 09 Jul 2012 Posts: 468 Status: Offline |
Would heat wrapping it make a difference? |
 Posted 10th Jul 2012 at 09:05
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clen666
Seasoned Pro  Location: Co. Durham Registered: 12 Feb 2009 Posts: 2,401 Status: Offline |
Post #2
Decats do tend to increase the 'raspy' sound of the system, probably still best to check it if you think it could be blowing though.Apparently wrapping does quieten them down a bit ________________________________________ Team 'unintentional rat look' |
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Posted 10th Jul 2012 at 09:15
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,769 Status: Offline |
Post #3
clen666 wrote: Decats do tend to increase the 'raspy' sound of the system, probably still best to check it if you think it could be blowing though. Apparently wrapping does quieten them down a bit ^^ This I would get under the car and just check it whilst it's running to be sure there are no leaks but I'm guessing it's just the sound they make that you're hearing.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone  |
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Posted 12th Jul 2012 at 07:56
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armzsc6
Seasoned Pro  Location: Crowborough Registered: 22 Mar 2008 Posts: 3,445 Status: Offline |
Post #4
When I first got a decat in my power flow the actual decat itself let loads of noise through so you get a horrible rasping from Underneath the car. I heat wrapped the whole Down pipe all the way to the centre box and it's much improved. Had it off to change a few exhaust gaskets the other day before going supercharged and found I had some spare heatwrap after doing my manifold ages ago so I went over the top of the wrap on the decat again so now it has 2 layers. No noise from it at all now even at full boost and pops and bangs out the exhaust like a goodun  ________________________________________ Black power baby! SUUUUUPERCHARGED Seat Leon FR TDI 190BHP 300lbft daily gti-6 killer :p 12x 306's owned so far Cambelts, clutches, service work carried out on All makes and models, Peugeot Citroen / mitsubishi specialist. Pug planet / Citroen Lexia diagnostics / code reads available. |
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Posted 12th Jul 2012 at 12:02
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argyle
Newbie Location: nottingham Registered: 05 Apr 2012 Posts: 34 Status: Offline |
Post #5
armzs16 wrote: When I first got a decat in my power flow the actual decat itself let loads of noise through so you get a horrible rasping from Underneath the car. I heat wrapped the whole Down pipe all the way to the centre box and it's much improved. Had it off to change a few exhaust gaskets the other day before going supercharged and found I had some spare heatwrap after doing my manifold ages ago so I went over the top of the wrap on the decat again so now it has 2 layers. No noise from it at all now even at full boost and pops and bangs out the exhaust like a goodun Ive just done this, this morning. mine sounds like its blowing but cannot find out where. had all joints cleaned, sealed etc but nothing changed. hoping the wrap will help! Just gotta wait for the sealant to dry properly befor i can try it  |
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Posted 15th Jul 2012 at 17:09
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Matt_rallye
Regular Location: Bournemouth Registered: 09 Jul 2012 Posts: 468 Status: Offline |
Post #6
It's rasps with throttle not at idle, will heat wrap it. Anything recommended? |
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Posted 15th Jul 2012 at 17:51
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,769 Status: Offline |
Post #7
Matt_rallye wrote: It's rasps with throttle not at idle, will heat wrap it. Anything recommended? General exhaust wrap, available from places like Rally Design or Demon Tweeks. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 16th Jul 2012 at 19:45
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Matt_rallye
Regular Location: Bournemouth Registered: 09 Jul 2012 Posts: 468 Status: Offline |
Post #8
Okay awesome. I'll look into it once my engine is rebuilt |
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Posted 16th Jul 2012 at 22:11
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armzsc6
Seasoned Pro Location: Crowborough Registered: 22 Mar 2008 Posts: 3,445 Status: Offline |
Post #9
eBay  ________________________________________ Black power baby! SUUUUUPERCHARGED Seat Leon FR TDI 190BHP 300lbft daily gti-6 killer :p 12x 306's owned so far Cambelts, clutches, service work carried out on All makes and models, Peugeot Citroen / mitsubishi specialist. Pug planet / Citroen Lexia diagnostics / code reads available. |
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Posted 16th Jul 2012 at 22:29
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