biggaz Posted November 1, 2008 Report Share Posted November 1, 2008 Just looking to see if anyone has de-cat there 1.4 tdi and wanna know if it was any better?I very much doubt theres any off the shelf so presume its a custom job?Anyone? Quote Link to comment Share on other sites More sharing options...
AwesomeAl Posted November 1, 2008 Report Share Posted November 1, 2008 Eyup Gaz Do it mate! Nothing off the shelf but its easy enough for any custom exhaust place to do. My recommendation would be to get a FLANGE to fit the turbo and have a 2" downpipe made up for it ! This way your turbo will spool up a little bit quicker and you'll get your peak torque faster!I've got a Milltek Largebore downpipe on my Bora with No-Cat and it made a fair bit of difference ! TBH It improved the economy a little more as well Quote Link to comment Share on other sites More sharing options...
biggaz Posted November 3, 2008 Author Report Share Posted November 3, 2008 Eyup Gaz Do it mate! Nothing off the shelf but its easy enough for any custom exhaust place to do. My recommendation would be to get a FLANGE to fit the turbo and have a 2" downpipe made up for it ! This way your turbo will spool up a little bit quicker and you'll get your peak torque faster!I've got a Milltek Largebore downpipe on my Bora with No-Cat and it made a fair bit of difference ! TBH It improved the economy a little more as well Ello mateIm thinking of just asking powerflow to do me a de-cat, just a standard changeover piece so i can swap it back when i need to Got one made from them for me mams motorhome (cat pinched!) and they charged £70 which was fair enough.Mines just seemed a bit flat recently, wanna bit more but im tight cheers gaz. Quote Link to comment Share on other sites More sharing options...
AwesomeAl Posted November 4, 2008 Report Share Posted November 4, 2008 Ello mateIm thinking of just asking powerflow to do me a de-cat, just a standard changeover piece so i can swap it back when i need to Got one made from them for me mams motorhome (cat pinched!) and they charged £70 which was fair enough.Mines just seemed a bit flat recently, wanna bit more but im tight cheers gaz.To be fair, Your never going to need to change it back anyway as the laws don't currently require a cat on Diesels Quote Link to comment Share on other sites More sharing options...
biggaz Posted November 4, 2008 Author Report Share Posted November 4, 2008 To be fair, Your never going to need to change it back anyway as the laws don't currently require a cat on Diesels Really! Thats amazing Never knew that. Quote Link to comment Share on other sites More sharing options...
AwesomeAl Posted November 5, 2008 Report Share Posted November 5, 2008 Ideal really Don't even need any backpressure on a diesel really !Get a Mufflerectomy done ! Quote Link to comment Share on other sites More sharing options...
richardn Posted November 9, 2008 Report Share Posted November 9, 2008 how much more power can be gained from this? Quote Link to comment Share on other sites More sharing options...
AwesomeAl Posted November 13, 2008 Report Share Posted November 13, 2008 how much more power can be gained from this?In conjunction with a remap it will help give better power gains, but if you are doing it on its own, or have already had a remap, It isn't going to gain you any peak power.The best way I can put it is with this graph...OK so Its not the best graph as a lupo TDI is never going to see this level of power. but here goes:The Blue line is a Completely Standard ASZ (130bhp) TDI engine with an Upgrade panel filter.The Black line is the same ASZ engine with the Pannel filter and a Generic Remap.The Red line is an ASZ engine with a Large bore downpipe and high flow exhaust system and a custom map.If you look at the Torque line between 1,000 and 2,000 RPM, You will see that the red line rises much faster than the Black or Blue line does. This is simply because now that the Catalyst has been removed, The turbo is much more free to breathe and as their are less restrictions it is allowed to spool up that little bit faster meaning that it hits peak torque sooner. The other benefit of a de-cat on the TDI's is that you can hold the torque for longer allowing the car to be mapped past its original redline.As you can see on the graph above, the custom remap takes power all the way to 5,000rpm! Quote Link to comment Share on other sites More sharing options...
MattTDI Posted November 13, 2008 Report Share Posted November 13, 2008 i was told that my map would adjust after the decat, is this wrong or should i get it redone? Quote Link to comment Share on other sites More sharing options...
AwesomeAl Posted November 13, 2008 Report Share Posted November 13, 2008 i was told that my map would adjust after the decat, is this wrong or should i get it redone?It will adjust a tiny amount but only to the extra boost at low levels.A map can't really take into consideration less resistance from the exhaust side of things without being amended.Was your map a custom map (3 - 5 hour job) or was it a Generic map (30 mins - 1 hour job) ? Quote Link to comment Share on other sites More sharing options...
pro3mark Posted November 18, 2008 Report Share Posted November 18, 2008 Get a de-cat, because Al todl you too, and he's right (Y) Quote Link to comment Share on other sites More sharing options...
Niche Posted November 18, 2008 Report Share Posted November 18, 2008 I want a TDI! Quote Link to comment Share on other sites More sharing options...
MattTDI Posted November 19, 2008 Report Share Posted November 19, 2008 It will adjust a tiny amount but only to the extra boost at low levels.A map can't really take into consideration less resistance from the exhaust side of things without being amended.Was your map a custom map (3 - 5 hour job) or was it a Generic map (30 mins - 1 hour job) ?the map was taken off my ECU and sent to Darren @ G-Werks.. then sent back about an hour later and put back on... bit of both, all my figures were changed, and it cannot be used on another car. not a live map tho Quote Link to comment Share on other sites More sharing options...
AwesomeAl Posted November 23, 2008 Report Share Posted November 23, 2008 the map was taken off my ECU and sent to Darren @ G-Werks.. then sent back about an hour later and put back on... bit of both, all my figures were changed, and it cannot be used on another car. not a live map thoSo it is a generic map then...Unless the car was either mapped on the rolling road or live on the road, it is not a custom map.The ECU on your car is self learning so it will learn to a de-cat in some ways, but it won't have anywhere near the level of benefit that having a full custom map done once the de-cat is done. Quote Link to comment Share on other sites More sharing options...
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