doubt injection amount alfa 147 JTD

[fabio]

hi guys, I wanted to ask you how many mm3 of fuel can I inject on an alfa 147 JTD 115hp with the following changes :
EGR off map and with the flange;
elimination kat ;
downpipe;
all the rest original.
up to now I have arrived to inject 90mm3 adapting the maps to this change (tested with ***********),I would like to know what I can push myself ...thanks

[munro]

that injectors mountains? intended as numbering bosch.....

[fabio]

Then I can read this 0445110.... 119 some numbers on them or not-I can read..... okay ?

[munro]

yes, the numbers are right..the mountains are the 119...
depending on the internal calibration of the injectors these to 1350 bar of rail flows between 110 and 115 mm3 of fuel....
that is, to the press rail the limit that you can inject in quatita are 110-115 mm3 of fuel....

[fabio]

Perfect... should I also increase the Rail pressure to inject more? with turbo ori? Or I focus on That amount?? Thanks for the availability

[munro]

you have to see with that quantity how much ? long your injection...
over the 10? from the pms you're in the post-combustion chamber, then you have a lot of smoke and heat so much....
then to inject the quantity to remain within this, "window of time" you have 3 ways...
1) to increase the rail...but you still have a certain limit given by the pump both low-and high-pressure...
2) you can slightly increase the advances to try to "giostrarti" the injection...but I would advise against it because if you do not have knowledge, you can do damage....
3), and this you I highly recommend you can mount the injectors bigger that has an equal number of "window of time" will allow you to inject large iq without going into the post-combustion chamber...

[fabio]

Sisi knew already? of these options.... I would like to know if 1.5 bar turbo pressure, and cn the relative quantity? air fed into the combustion chamber, I can burn more? 110 mm 3 or they take more? air, and then a turbo more? big.... Then for curiosity? : when I go into the post-combustion chamber, I get those scoppietti from the exhaust? And an effect that has always attracted me but I don't know l Work?.... Thanks again

[munro]

to find out how much air st? sucking in your engine and your turbo,and therefore how much fuel you can burn, you have to make a log and see the maf(mass air flow sensor) 1.5 as a function of how much air they are sucking in.....from them he would be in the stoichiometric ratio relative(because there are other variables in play type, temperature,humidity of the air, etc.) that can influence the final result but let's say that by doing so you have a record quite true of the situation...
the post-combustion chamber, are not the scoppietti exhaust but ? diesel pilot, not being able to burn everything in the combustion chamber via the injection is too long and continues its combustion out of the combustion chamber in the exhaust manifolds and the turbine itself, thereby causing heat and smoke to the stars...and a condition to avoid like the plague for a diesel engine because it is equivalent to distrugere a motor in a short time....
if you mounts a pressure gauge rgt, you will see that the more smoke the more the temperature of the exhaust gas, and then burning are high....to all c'? a limit...

[fabio]

[hftdelta]

Hi Fabio, sorry for the question, but it makes you scoppietti exhaust? it seems to me a pu strange for a diesel! usually this is done on the petrol turbo!!:)

[fabio]

Nono I nn make them... For? I've seen who can do it on the diesel, and I wanted to know how it was done and to what principle are outside the scoppietti

[munro]

the scoppietti are out when it acts in the map "by removing and restoring" suddenly the diesel for a particular rpm...
usually acts on the torque limiter and on its axis turns...
for? if you want you can? also lower the rev limiter and its counter turns out that ori are set very high...type 6000 rpm.....to obtain the same effect....
know? that this "choreography" serves no purpose and it's actually also pretty harmful, especially for the distribution...

[fabio]

Thanks munro for the things you say to me, but I'm a little igniorantello and I can't discern your advice.... For " acting on the torque limiter" you mean lower the b. p. Rpm to 5000 for example? Instead, with regard to the rev limiter I don't know where you find it :D

[munro]

you set the last two b.p. the engine revs close to each other es 5000>5010 rpm....
in such a way that the ecu does not have possibility to interpolate the laps between them and to cut diesel suddenly...
at the same time in the limiter out-and-out to 5000 rpm, from all the diesel fuel that you want to give 5010 from 0 diesel
usually the limiter to achieve this effect should be made to the team..

[fabio]

Thanks 1000... I limiter I keep it down? done to the team then I'm at a place.... I don't know how to thank you, you have been invaluable