Gregor
Member
Registered: 28th Nov 03
Location: Paisley, Renfrewshire
User status: Offline
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My car seems quite raspy when i boot it , maybe at around 3k revs ?
Would it be due to the 4 branch ?
I do NOT have a decat
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IvIarkgraham
Premium Member
Registered: 27th Mar 04
Location: Ellesmere Port, Cheshire
User status: Offline
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you fitted that grill yet?
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Gregor
Member
Registered: 28th Nov 03
Location: Paisley, Renfrewshire
User status: Offline
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Yes matey , got the bumper to fit though
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csweatherston
Member
Registered: 16th Jan 06
Location: Devon
User status: Offline
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my protech was a shit fit (when it still had the orriginal flange)....it kept opening when i booted it, and sounded sh!te
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Scotty C
Member
Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
User status: Offline
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Mine sounds amazing
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VegasPhil
Premium Member
Registered: 16th Jan 05
Location: Fareham, Hants Drives: Octavia VRS
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Does it work now Gregor?
Corsa 2.0 16v Vegas - Sold
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andyc1234
Member
Registered: 7th Nov 06
Location: Lancashire
User status: Offline
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mine makes a bit of a mad noise with a manifold on like a bit of a rasp but from the front. its sounds best touching 6500 rpm
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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I have one here to try. collector (bit where the 4 pipes come together at the flange) is a shite design so im chopping it off and replacing it ith a straight piece of 2.25" pipe into the exhaust system.
other than that its a decent design.
oh and greg, if you have a decat, thats more likely to cause a rasp.
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csweatherston
Member
Registered: 16th Jan 06
Location: Devon
User status: Offline
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uh?..replache the collector with a piece of 2.25" pipe?..
how do you plan on getting the 4 pipes airtight?....
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Gregor
Member
Registered: 28th Nov 03
Location: Paisley, Renfrewshire
User status: Offline
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Almost working phil !
Nah I have a cat
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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quote: Originally posted by csweatherston
uh?..replache the collector with a piece of 2.25" pipe?..
how do you plan on getting the 4 pipes airtight?....
by tig welding a proper collector and flange on
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csweatherston
Member
Registered: 16th Jan 06
Location: Devon
User status: Offline
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erm...slightly pointless dave... i had the flange cut off mine, and a 2 1/2" pipe with flexi to the cat..... the only way i could stop the rasp...
whats wrong with the standard collector?
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Steve X16XE
Member
Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
User status: Offline
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I have one, It did rasp for a bit. But that was because the flange on the old downpipe-cat broke.
When fixed, it still rasped!!! Found my de-cat wasn't fitted correctly!!!
Fixed that, Now... Sounds very nice. Next, Backbox!!!
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M303CGO
Member
Registered: 29th Dec 06
Location: Germany & Yorkshire
User status: Offline
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I Had my system fitted today. Magnex full system with de cat.
Sounds deeper at tick over but around 2-3k revs is quite raspy. Can this be sorted?
Cheers
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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quote: Originally posted by csweatherston
erm...slightly pointless dave... i had the flange cut off mine, and a 2 1/2" pipe with flexi to the cat..... the only way i could stop the rasp...
whats wrong with the standard collector?
not at all pointless. the design of the collector is poor. it should be longer. also the flange i/d is about 14mm smaller than the collector i/d this causes a big step right after the collector which is a major restriction and the cause for the raspiness.
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M303CGO
Member
Registered: 29th Dec 06
Location: Germany & Yorkshire
User status: Offline
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quote: Originally posted by M303CGO
I Had my system fitted today. Magnex full system with de cat.
Sounds deeper at tick over but around 2-3k revs is quite raspy. Can this be sorted?
Anyone?
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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it will be the decat making yours raspy mate. well its not the decat that does it, the rasp is actually a knock on effect of the inlet design.
get a decat with a silencer
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M303CGO
Member
Registered: 29th Dec 06
Location: Germany & Yorkshire
User status: Offline
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So would it be better when i sort my inlet? Thinking of Dbilas with cda filter
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M303CGO
Member
Registered: 29th Dec 06
Location: Germany & Yorkshire
User status: Offline
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quote: Originally posted by M303CGO
So would it be better when i sort my inlet? Thinking of Dbilas with cda filter
Anyone
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csweatherston
Member
Registered: 16th Jan 06
Location: Devon
User status: Offline
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i think he means the inlet into the decat....
the protech collector isnt too bad, but i totally agree with you that the flange is shoot on the protech manifolds.... it reduces from 2 1/4" to 2".
i had the flange removed and a 6" flexi welded in place....it seriously improves the design....
next i need something to guard the lower branches from the road
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Scotty C
Member
Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
User status: Offline
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Mine DID NOT change exhaust note what so ever when I fitted my inlet
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davey_jack
Member
Registered: 28th Jan 06
Location: Horley, Surrey Drives: Clio 182
User status: Offline
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my protech manifold fitted fine, I just had to grind it back a bit around the base to allow the thermostat housing to fit! Also I have a decat and a straight through centre pipe with scorpian back box and it sounds lovely, no raspyness!
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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quote: Originally posted by csweatherston
i think he means the inlet into the decat....
no, I meant the inlet manifold on the engine. different inlets affect the exhaust sound a lot. as a general rule, the shorter the inlet the louder the exhaust.
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csweatherston
Member
Registered: 16th Jan 06
Location: Devon
User status: Offline
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you are joking right?........would be un-noticable, untill you start getting valve bounce/overlap... would also depend on the air filter/ t/b,
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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no, its 100% true.
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