tedsmart Posted July 18, 2010 Share Posted July 18, 2010 Hello, I've been thinking about removing the mid section silencer on my exhaust, off a 300Tdi Defender and wondered if anyone had done this and what the out come was? I have the replacment pipe all I need is an hour to do the job! Q, do I need new studs for the flanges or will the old ones come out? Thanks fort your input. ted Quote Link to comment Share on other sites More sharing options...
western Posted July 18, 2010 Share Posted July 18, 2010 I did similar on my 200Tdi 110, get new bolts/nuts, much nicer to fit than scabby old rusty bolts. Quote Link to comment Share on other sites More sharing options...
errol209 Posted July 18, 2010 Share Posted July 18, 2010 I did similar on my 200Tdi 110, get new bolts/nuts, much nicer to fit than scabby old rusty bolts. And a big pot of Copperease, makes them much easier to undo next time. Quote Link to comment Share on other sites More sharing options...
Se7enUp Posted July 18, 2010 Share Posted July 18, 2010 I swapped out the rusted centre silencer to a "straight thru" pipe (bought from someone on here). It actually turned out to be a 20 minute job. Three of the bolts holding the old rusted silencer sheared as I undid them so it only took a few mins to get the old silencer off The new pipe went on with new bolts (and copaslip!) I got in and turned the key and ....... it sounded just like it did before Driving it and it still feels just like how it did before the new pipe From this, all I can summise is that the centre silencer really doesn't do too much on a 300 tdi! Quote Link to comment Share on other sites More sharing options...
nicks90 Posted July 19, 2010 Share Posted July 19, 2010 removing the CAT from the 300tdi will have much more effect than the centre pipe mod. The cat is easily the most restrictive part of the system and removing it will make a big difference. Quote Link to comment Share on other sites More sharing options...
rusty_wingnut Posted July 19, 2010 Share Posted July 19, 2010 On a 300tdi you need to remove the ridiculous silencer at the rear, I fitted a 90 deg bend and straight pipe, it was worth a couple of miles an hour more up a steep local hill... Quote Link to comment Share on other sites More sharing options...
errol209 Posted July 19, 2010 Share Posted July 19, 2010 Hell, have you lot left anything on? Quote Link to comment Share on other sites More sharing options...
rusty_wingnut Posted July 19, 2010 Share Posted July 19, 2010 I have a 110 rear silencer, and that's it, just straight pipe with one elbow Quote Link to comment Share on other sites More sharing options...
Aragorn Posted July 19, 2010 Share Posted July 19, 2010 Turbos are pretty good silencers anyway! Quote Link to comment Share on other sites More sharing options...
nicks90 Posted July 20, 2010 Share Posted July 20, 2010 Hell, have you lot left anything on? Nope! no cat, no mid box, no back box. pipe is standard bore and as straight as physically possible (except for a bend over the back axle) and exits out the back. minimum restriction possible to increase the pressure differential on either side of the turbo - means it spins up much much quicker and at lower revs. Difference is quite marked. Bit noisier, bit its a 90 with mud tyres and alot of rattles... so who cares? Quote Link to comment Share on other sites More sharing options...
redb999 Posted July 21, 2010 Share Posted July 21, 2010 Hi, on my 300 90, i removed all the 300 system bar the non cat downpipe and bought a second hand Td5 tailpipe and made my own straight through pipe to join them... I get the same miles out of a tank, driven hard everywhere now than i did taking it real easy before, if driven gently i get about 20 to 30 miles extra. Torque has noticebaly increased i can get the higher gears much sooner and it goes quicker. Sound wise, it is much louder... sounds awesome when i floor it, turns heads as you drive down the street and cannot help to drop down a gear in tunnels now. when taking it easy it soudns fairly standard however drones ever so slightly more on a motorway. BTW i am 19 so may have differing views on exhaust loudness best modification ive done though! cheers Will Quote Link to comment Share on other sites More sharing options...
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