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Hi all, I have a 147 mjt 120 mapped and defappata with the egr closed of 2008, I ask you ? better also empty the catalyst under the turbine, or ? better to leave... C'? who says serves as a back pressure to the turbine who says, the better to empty it... Attend? your advice.... Thank you in advance
if you want a board you have to bucarlo,as I do with 3 holes with the tip diameter of 12.........never had any problems!!
everyone has their own method, I prefer to always leave the catalyst intact and remove the entire contents without break of the dpf.
I meant the catalyst where is the probe labda no dpf
according to you, freddy...the exhaust gas,after the map will be many more, and probably also a p? the hotter and therefore more "voluminous",as soon as they come out from the crowd and better if you are or not something that "stands in the way"??ragionaci you, and draw your own conclusions from that....Quote:
Originally Written by freddyecu
I can only bring an es...if a door is made to pass 2 normal people at a time, do you want to go 4 overweight all together..what do you think would happen??
ops... if you speak of the catalyst to leave it original!!
leave it original and also in my opinion and then not, and said that after a rimapatura smoke; hence must increase ecesivamente
I and may I add if you empty the pree catalyst which ? also matallico and makes you suffer to empty it, you'll have a larger diameter and a pressure drop at that point, I like to always leave the constant diameter both with regards to the dpf, I put a tube specially made with the same diameter of the exhaust is the same for both, with regard to the pree there are special drowunpipe if you write that it is not expedient to empty it, even if on a 147 we have emptied and it doesn't change anythingQuote:
Originally Written by munro
Hello I empty my only only if problems if and attapato..Quote:
Originally Written by freddyecu
Alberto, can you explain better? Thank you in anticopo
I am the catalyst for the moment I keep it intact even if I agree with what it says munro, in fact, many place it with the so-called "Downpipe" that the other does not ? that exhaust ****** all of us? allows you to reduce the pressures that the temperatures that are a burden on the group exhaust manifold/turbocharger, resulting in more performaces and less stress on the turbocharger and on the exhaust manifold.
For the dpf, I replaced with a straight tube so I kept the integrity of the dpf that I can rimomtare the day that I need andre to do the testing :)
then it may happen that emptying these containers , they may serve as a resonance chamber with a roar, not always pleasant:rolleyes:
guys get it into our heads that a catalyst,of any type,including sports,is always to structure an obstruction to the ****** the passage of the gas.....c'? to say then that many of the catalysts of "the whole grass a bundle" forgetting perhaps that there are different types of kat and that the one specifically for the diesel is referred to in technical jargon as "one way" the cio? monovalent or "reductive" as it breaks down, and only the nitrogen oxides,called Nox,so the difference on a kat trivalent ones used on the benz so to speak ? abbissale....then for like ? the fact the kat of a diesel, we can put on the drain line 50 kat one at the other, but if we make a lot of diesel fumosit? sar? always the same, even without even one single kat......
thoughtful people...meditate...
I do not take it off just to keep some back pressure
and do you think that is a good thing??Quote:
Originally Written by sportknight
with only the precatalizzatore you
glad you....I am of the "school of thought" that already? the turbine itself for its conformation from a back pressure on the discharge line....I prefer to have the maximum "smoothness" of the gas immediately after this to keep the temperatures of the gas...then, however, each one on his car f? as he sees fit....
I can only say that on some of the media are very pumped sometimes I'll take the trouble to mount a pressure gauge just to see what kind of relationship I have between press turbo and backpressure and although I prefer, as said discharge lines, the more free can on these vehicles I see pressures also of 3: 1 i.e. for each bar press turbo c'? there are 3 exhaust.....
according to me, no ? the maximum species for the exhaust valves and springs with pressures so high may not close properly...to the point of "float" with easily imaginable consequences...
I empty my everything......even cat
well, tested it on my car mapped, the engine has lost too much torque in the low and gaining a bit of extension type 2-3 km, with the cat emptied, even after the update of the controller post emptying.
I'm on a 120 hp mjet to a friend I removed the fap in place of a straight tube and I had it cali increases. ? remained unchanged in terms of performance
I hate the things emptied...you put a downpipe and turbine ringraziera.... x as regards the catalyst, however, with troubles ori I notice the ke map only loses to low a bit...then me x the prekat and replace it with a downpipe, but the cat let him ori and then a nice finish craft :D
in fact...cat original and prekat replaced with downpipe...not good eda diameter moving on to another and then back to me, not like
I.......Quote:
Originally Written by angelolsp
By eliminating both the machine empties too and stretches and then goes pumped a lot with the holes, you can have a map with more soft
I'd take advantage of the elastic bands and you have ir? grit to the bass
and as I had the exhaust broken....better to create a little back pressure to get the benefits!!!Quote:
Originally Written by Friar
According to me, the down pipe put it blank so decrease anke the temperature of the turbine, the catalyst maybe if you emptied it with makkina semi-original lose too low to be put maybe 200 cells, if, instead, perhaps, in the future, you want to make a preparation + push type turbine + great and other things after the take off of everything..
I don't know who has pulled out of this history of back pressure on the turbo diesel engines........... mica we are talking about 2 times !!
I have done many tests on a chassis dynamometer, and with a stopwatch, GPS , the result ? removing the prekat down I have NEVER LOST ANYTHING..... but I only gained the upper , and in the duration of the life of the turbine.
Over the years, I did tests on the drive aspirated and turbo-charged cars and petrol. Very rarely you go out from this rule.
regarding the removal of the catalyst the same concept ? more or less similar? them took over most of the speech, environmental pollution, and the humanities and then in each one ? ****** deciding on us? they want to believe.
I have removed the cat and I have replaced it with a downpipe and I left only the final and I found banissimo
precisely :)
to do this test, please remove the exhaust turbine only that Scaria in the environment to see what happens as the car is shit under not, you can go from a diameter ranging from 60 to 200 purging the catalyst for the other test decrease the diameter see what happens you so much backpressure on the exhaust valves.Quote:
Originally Written by Mr.Flash
I forgot it says this character http://it.wikipedia.org/wiki/Equazione_di_bernoulliQuote:
Originally Written by legendaryslave
don't exaggerate , no one here has told you to go without unloading.
the equation ? certainly valid, but ? wrong applied in this case!!!!! before I open my mouth, I do the tests, I've done, and the results are as above written. NB when I say remove prekat I do not intend to break through and leave them on an empty stomach, this is not ? the maximum. The maximum is obtained by replacing the prekat with a vacuum tube of the same diameter of the original pipe coming in to prekat. That ? it is a tube of the correct diameter , designed by the designers and also according to the bernoulli's equation.
add: clearly if we vary the diameters , lengths , and anything else (breaking the prekat or the kat, and leaving the stomach empty you go to extend the diameter (to slow down the speed? of the gas) and then again tighten it and this ? very counterproductive. Of course ,compared to a DIESEL particulate filter clogged ? always a paradise. Everything is to see what we are comparing. My tests were done on race engines where it was possible to increase the diameters. Increasing the diameter beyond a certain value (relative!) do not bring additional benefits. Increase huge diameter leads to the problem that you mentioned. But to make the idea you speak of 76mm exhaust on a 1.4 engine naturally aspirated.....