HotRod Posted December 10, 2007 Share Posted December 10, 2007 Has anyone managed to make their Tdi sounds any 'fruitier'? Not expecting a V8 burble but I've seen silencer replacement pipes and wonder whether they improve the exhaust note. It is also claimed they improve power/economy - anyone tried one? Regards Quote Link to comment Share on other sites More sharing options...
suggs Posted December 10, 2007 Share Posted December 10, 2007 yep i had a custom side exit made without a back box, sounds meaty but its pretty lowd too.. Quote Link to comment Share on other sites More sharing options...
HotRod Posted December 10, 2007 Author Share Posted December 10, 2007 yepi had a custom side exit made without a back box, sounds meaty but its pretty lowd too.. Now that's what I had in mind, thanks for the pics Suggs. Presumably not toooo loud for MOT? By the way, love your songs! Quote Link to comment Share on other sites More sharing options...
nicks90 Posted December 10, 2007 Share Posted December 10, 2007 i removed the back box on my 300tdi initially (well a big rock at weardale did) and just fab`d a pipe to exit in the original position. that made a slightly nicer noise, but not really much difference. i then punctured the center box (another rock) and put a straight bit of pipe in its place. i then removed the rear fab'd up pipe and replaced it with another straight bit which exits out back of the crossmember. so all i have now is a none CAT downpipe, straight pipe to the rear axle, slight bend overthe rear axle and then a final bit of straight pipe to the rear Xmember. no boxes, silencers or anything. sounds good for a tractor engine. Not too loud, as the turbo muffles most of the noise and the pipe bore is the same as standard so there aint too much reverberations or 'barryboy boom'. turbo seems to spin up quicker with the reduced back pressure and it sounds good on full boost. next time i rip the exhaust off, i might go to a 3" pipe and see if that makes too much noise or if its still ok. Quote Link to comment Share on other sites More sharing options...
muddy Posted December 10, 2007 Share Posted December 10, 2007 Mines a straight through 2.5" with it exiting behind the passenger door. it can be heard will Quote Link to comment Share on other sites More sharing options...
HotRod Posted December 10, 2007 Author Share Posted December 10, 2007 thanks guys, keep them coming Straight through idea with side exit looks good, are they OK for MOT's or do you need a sympathetic tester? Quote Link to comment Share on other sites More sharing options...
suggs Posted December 10, 2007 Share Posted December 10, 2007 sound similar to mine, forgot to say mines straight through. no boxes or cat etc. dont think theres an issue with mot's as its not very lowd on tickover and low rev's, im not sure about the exit point though as there could be a height issue, ill find out in Feb lol Quote Link to comment Share on other sites More sharing options...
90 Mellis Posted December 10, 2007 Share Posted December 10, 2007 I'm Running 2.5" Straight Thro from the Turbo on my 200 Tdi. Will be side exit when finished. Sounds great under load or at high revs but is still reasonable at cruising speeds. Quote Link to comment Share on other sites More sharing options...
HotRod Posted December 11, 2007 Author Share Posted December 11, 2007 Excusing my ignorance but do Tdi's come with a catalytic converters? Thought this was only for petrol motors? Anyhow, doesn't it increase emissions for MOT test if you scrap it? Making plans for side exit! Can U buy those trims rings or just cut one yourself from plate? Quote Link to comment Share on other sites More sharing options...
Milemarker Type S Posted December 11, 2007 Share Posted December 11, 2007 Can U buy those trims rings or just cut one yourself from plate? Devon 4x4 sell the one in the pictures above. Shrek Quote Link to comment Share on other sites More sharing options...
landrover598 Posted December 11, 2007 Share Posted December 11, 2007 My 200 tdi has a full length, standard exhaust, but with both boxes replaced with straight pipe, sounds very throaty under load, but not really noticable at high speeds with a full hard top. Quote Link to comment Share on other sites More sharing options...
RRX Posted December 11, 2007 Share Posted December 11, 2007 Excusing my ignorance but do Tdi's come with a catalytic converters? Thought this was only for petrol motors?Anyhow, doesn't it increase emissions for MOT test if you scrap it? Making plans for side exit! Can U buy those trims rings or just cut one yourself from plate? The discovery's had a cat on the 300tdi but they are mostly particulate filters to stop some of the soot coming out the back Quote Link to comment Share on other sites More sharing options...
GBMUD Posted December 12, 2007 Share Posted December 12, 2007 A catalytic converter is not a particulate filter, it is a device which changes the chemical composition of the exhaust gasses as they come into contact with it's surface. They do much the same job in a diesel as in a petrol, converting CO and NO2 into CO2, Oxygen and Nitrogen - I think! On the MOT they do not test the noise level, it is down to the tester to determine if the noise level is appropriate for the vehicle type. Either way, they do not make much noise when not under load and there is no under load test on the MOT, just the revving test where they are looking for smoke density. I had a 200Tdi 90 with the silencers removed and the exhaust exiting on the drivers side. It was dreadfully noisy and, while it sounded really cool at tickover and manoeuvring speeds, it was horrid at speed and under load and sounded like all the worst boy racer chavmobiles. I replaced the first two boxes in the (3 box) system. It did pass the MOT without so much as a raised eyebrow. Chris Quote Link to comment Share on other sites More sharing options...
HotRod Posted December 12, 2007 Author Share Posted December 12, 2007 Hmm, seems like maybe keping the cat/1st box and ditching the rear box is a reasonable compromise Quote Link to comment Share on other sites More sharing options...
white90 Posted December 12, 2007 Share Posted December 12, 2007 I removed the catalyst and the boxes then had an Oval center box fitted to avoid the crawler box no boxes was embarrassing with the noise No call for a catalyst on a diesel engined car for the MOT Quote Link to comment Share on other sites More sharing options...
GBMUD Posted December 12, 2007 Share Posted December 12, 2007 No call for a catalyst on a diesel engined car for the MOT Sorry I should have been clearer, the catalytic converter can be junked as it risks restricting the free flow of gasses. You can buy a non-cat downpipe if yours currently has one fitted. Chris Quote Link to comment Share on other sites More sharing options...
Happyoldgit Posted December 12, 2007 Share Posted December 12, 2007 We are talking diesel Land Rovers right? Anyone got any blue glow in the dark windscreen washer jets fitted too? Quote Link to comment Share on other sites More sharing options...
muddy Posted December 12, 2007 Share Posted December 12, 2007 I have glow in the dark stickers and furry dice:) I lost the racing gearnob tho Infact i have a 'performance' air filter on the snorkle top too, 20bhp itself and 5bhp for being on show The funy thing about it is it used to be on a 1.0micra which just went bwooap bwooap but on the tdi under boost it sort of wails you even get a sort of shruoop as you let off INNIT Quote Link to comment Share on other sites More sharing options...
Happyoldgit Posted December 12, 2007 Share Posted December 12, 2007 Extreme. Innit. Quote Link to comment Share on other sites More sharing options...
HotRod Posted December 12, 2007 Author Share Posted December 12, 2007 QUOTE "I removed the catalyst and the boxes then had an Oval center box fitted to avoid the crawler box no boxes was embarrassing with the noise. No call for a catalyst on a diesel engined car for the MOT" That sounds like a plan, time to reach for the welder Quote Link to comment Share on other sites More sharing options...
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