No more than 3 IQ maps in edc15 you may find up to 9 map is in some versions due to production variant coding but only ever 3 in play at one time. The fuel will always be capped by IQ V driver demand / IQ v RPM or IQ v pressure ratio which tends to cap the first two across most the the rpm range under 100% pedal request. MAX 70mg IQ and upper limiters dont come until tuning hybrids and have no effect at all on the mapping as long as one for the 3 IQs will limit it. Which gets back to my point mapped correct the Decat will cause NO more added smoke as the edc15 map strategy is to allow for clean burn at all load sites under all conditions.
I have many many customers who have had 90-100-110tdi & 100pd-115pd-130pd-150pd-140pd stage 1 remaps then complimented the map at a later date by adding a decat and felt the results straight way and seen better MPG, The on the other had I have had customers who have replaced a fault oem cat with a cheap aftermarket cat with more compact restrictive cat celll and lost power, mpg and shed loads of black smoke afterwards. If there is not gains from a decat system then why are people doing it, are the TDI club lads getting it wrong?
The main restriction with the VNT TDIs is EMP and the decat will reduce the EMP and in return lower the EGTs and less heat transfer to the block, which means less heat generated and as we know all heat build up is wasted energy from the initial combustion torque, its fact.
There are more of my customers on this forum > http://uk-mkivs.net/forums/t/270216.aspx?PageIndex=6 who have had a spec1 remap and then at a later date fitted a decat system or just cut the cat out.
Even a quick read on this forum http://www.golfgtiforum.co.uk/index.php?topic=192354.0;topicseen
Oh Nick, you seem intent on discrediting us with your superior knowledge LOL.
Hardly productive for the others reading this forum but hey ho...........
My response to the 3 IQ maps thing was based on what you posted:
Quote:
“this is why there is 3 fuel IQ mapsâ€
Now that has turned into
Quote:
“only ever 3 in play at one timeâ€
And
Quote:
“across most the the rpm range under 100% pedal requestâ€
I was referring to the complete load range not just 100% load (after all this is what efficient tuning is about) and in fact there are a lot more than 3 maps that control IQ as I originally posted. Use your simulator/emulator to trace what the processor is reading and you will see ;-)
Quote:
“edc15 map strategy is to allow for clean burn at all load sites under all conditionsâ€
Thats just BS! Anyone who has owned a pd Tdi knows they are not the cleanest running diesels on the road. In fact the sole reason for VAG dropping the PDE injection system was failure to meet emissions compliance. They tried with DPF’s on pd170’s and we all know how that turned out! The problem with PDE is the injectors are driven by the camshaft drastically limiting the available injection event window and not allowing for any fuel pressure adjustment as the cam timing is fixed. This is why they changed over to common rail as this allows many injection events per stroke and electronically adjustable fuel pressure allowing them to meet euro5 compliance easily.
Please do not try and imply we have no knowledge of emissions or how to map properly as we have not even vaguely implied anything negative about you.
Also, to quote one of your customers from the uk-mkivs.net thread (page 4 user S600B_DC):
“Now I have been to a few RR's and know how loud and nerve racking they are, but this was the first diesel one and I wasn't prepared for the smokeyness but all was good and the car made a healthy 141/227 which was a surprise as its a 130 model.
Then the exciting stuff began and 2 more power runs a lot more diesel fumes and it was finished total time around 2 hoursâ€
So, a healthy car illustrating perfectly your “EDC15 clean burn map strategy†LOL!
Also, most of the people on that thread are talking about 1.8T de-cats not TDi’s. I can’t find a single post that illustrates what this topic is about.
Your second link that strangely appeared when you quoted yourself is the only thing that illustrates what we are trying to discuss and it seems a little strange that it was posted 3 minutes before your reply last night:
May 13, 2011, 23:52 vs May 13, 2011, 23:55
“After fitting my decat pipe i put the pipercross back in to see what happened and my mpg (due to the decat pipe) is better than before! Cant recommend a milltek decat enough, more power and higher mpgâ€
And it sounds very much like he changed his air filter at the same time not really illustrating anything.
All in all this banter is not constructive in the slightest and only distracts us from answering the real questions raised on the forum. I would suggest we keep our “superior knowledge†to ourselves and concentrate an answering the genuine questions posted on here.
Feel free to give me a call to discuss any of the above or better still pop in and see us and our facility if you have any doubts about who we are.
Kind regards,
Nick - Carbon
