dodgercannon Posted May 19, 2009 Report Share Posted May 19, 2009 Hi all I have been looking at having a custom exhaust made by powerflow for my tdi but I was just wondering what sort of sound would come out of it I dont want to sound like a corsa with scooby exhaust on, just a sporty note.I have seen a few vids on youtube of tdi exhausts and they have a high pitched whistle, like this which I love, would the little 3 pot loop have the same noise? had any one got a vid of theirs?Also is it illegal to decat a diesel as it needs a smoke test not an emmisions test? And what sort of bore could I have?Cheers. Quote Link to comment Share on other sites More sharing options...
AwesomeAl Posted May 19, 2009 Report Share Posted May 19, 2009 Hi there,It isn't illegal to de-cat a diesel engine at the moment.A de-cat and a centre resonator bypass would be the best way to optain the sound you are after. As for the diameter of the pipe bore, this is something you would want to leave upto a custom exhaust specialist as they will know what is best for your car.Back when I had my Lupo TDI, I removed the cat and the rear silencer replacing them with straightpipes (I.e. no boxes) although I did keep the centre resonator. It did sound pretty cool but the videos I have got of it are over 50meg each in size!!! Quote Link to comment Share on other sites More sharing options...
Olly G40 Posted May 19, 2009 Report Share Posted May 19, 2009 Can you let me know how you get on with this as i was looking to go down the same road WHEN i get a tdi! I love the sound of a diesel with an exhaust... makes a change from all the boy'od petrol corsas/novas etc! Quote Link to comment Share on other sites More sharing options...
dodgercannon Posted May 19, 2009 Author Report Share Posted May 19, 2009 Cheers Al, was it not really loud when you had straight through pipes? I decated my pervious car and my god was it loud it used to scare little children playing in the street lol. I might get a quote from powerflow and see what they say about bore size.Will also keep you in the "loop" olly, lol. Quote Link to comment Share on other sites More sharing options...
Steve TDI Posted May 19, 2009 Report Share Posted May 19, 2009 The derv engine isn't that loud compaired to the petrol engine. If you start a petrol car up without the manifold on it is going to be very loud but the derv engine isn't really loud. I had a Astra 2.0 DTI and I had a cat-back exhaust fitted. Under load it did sound good (no vids of this). This is a vid of my Corsa pre centre silencer. In time I might be getting a cat-back for the Arosa. Quote Link to comment Share on other sites More sharing options...
nfbr Posted May 19, 2009 Report Share Posted May 19, 2009 Cheers Al, was it not really loud when you had straight through pipes? I decated my pervious car and my god was it loud it used to scare little children playing in the street lol. I might get a quote from powerflow and see what they say about bore size.Will also keep you in the "loop" olly, lol.Tom's dad had an arosa TDI and his backbox fell off... He didn't notice any different Quote Link to comment Share on other sites More sharing options...
MattTDI Posted May 19, 2009 Report Share Posted May 19, 2009 (edited) Iv done the same as Al with his lupo, only increased bore by about half an inch.. one small centre box, no cat, and no tailbox... sounds great and also just for you al the BMC has gone does pull better without! Edited May 19, 2009 by MattTDI Quote Link to comment Share on other sites More sharing options...
nfbr Posted May 19, 2009 Report Share Posted May 19, 2009 Iv done the same as Al with his lupo, only increased bore by about half an inch.. one small centre box, no cat, and no tailbox... sounds great and also just for you al the BMC has gone does pull better without!AceI'd love another loop TDI. I rekon I could get 125/130bhp out of one with what I know now. Maybe even 200lb/ft Quote Link to comment Share on other sites More sharing options...
dodgercannon Posted May 19, 2009 Author Report Share Posted May 19, 2009 Iv done the same as Al with his lupo, only increased bore by about half an inch.. one small centre box, no cat, and no tailbox... sounds great and also just for you al the BMC has gone does pull better without!Could you post a vid up I'm really interested in what my 6valve will sound like with a decent zorst.AceI'd love another loop TDI. I rekon I could get 125/130bhp out of one with what I know now. Maybe even 200lb/ftYou can practice on mine lol. What would your plans be if you had a Tdi? Quote Link to comment Share on other sites More sharing options...
nfbr Posted May 20, 2009 Report Share Posted May 20, 2009 hmm, Custom de-cat downpipe (2.125") with a cat-back system (no centre silencer). Removal of all turbo/pipework intercooler and inlet manifold with a full clean up, completely re-designed airbox, slightly thicker core intercooler in original position with aluminium end caps not plastic ones as per OEM intercoolers, all possible pipework replaced with Silicon/aluminium then it'd just be a case of custom mapping to suit.My previous one got to 117bhp with just a backbox removal, BMC replacement filter and a custom map. Quote Link to comment Share on other sites More sharing options...
jon_273 Posted May 21, 2009 Report Share Posted May 21, 2009 hmm, Custom de-cat downpipe (2.125") with a cat-back system (no centre silencer). Removal of all turbo/pipework intercooler and inlet manifold with a full clean up, completely re-designed airbox, slightly thicker core intercooler in original position with aluminium end caps not plastic ones as per OEM intercoolers, all possible pipework replaced with Silicon/aluminium then it'd just be a case of custom mapping to suit.Whilst keeping the standard turbo? Quote Link to comment Share on other sites More sharing options...
M Bizzle Posted May 21, 2009 Report Share Posted May 21, 2009 i want a tdi so bad!vvrrroooooooooooooommmm! Quote Link to comment Share on other sites More sharing options...
dodgercannon Posted May 21, 2009 Author Report Share Posted May 21, 2009 hmm, Custom de-cat downpipe (2.125") with a cat-back system (no centre silencer). Removal of all turbo/pipework intercooler and inlet manifold with a full clean up, completely re-designed airbox, slightly thicker core intercooler in original position with aluminium end caps not plastic ones as per OEM intercoolers, all possible pipework replaced with Silicon/aluminium then it'd just be a case of custom mapping to suit.My previous one got to 117bhp with just a backbox removal, BMC replacement filter and a custom map.Wow I bet that would set me back a couple of grand I best start saving lol cheers dude Quote Link to comment Share on other sites More sharing options...
nfbr Posted May 22, 2009 Report Share Posted May 22, 2009 Whilst keeping the standard turbo?125bhp should be attainable with the O.E. turbo.Most of the work would be down to the fueling getting it to match the modifications done to the Intake, cooling, hoses and exhaust. Quote Link to comment Share on other sites More sharing options...
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