Soi and duration, limits and problems!

[project]

Hi guys, I open this discussion to talk constructively about a speech that many avoid, but since I want to learn and I don't stop insistero with this topic!
So what I was wondering mainly are limits to the increase that relate to the soi and duration, and what you are going to encounter exaggerating with these maps!
For example, I doing different studies and various research I came to the conclusion maybe wrong I don't know that for moddare a map in advance you may give the increases the damage on the injection time, for example:
We put that to 1000 bar for an IQ of 70 mg I have an opening in the map of 800us that we correspond to 30 degrees of motor rotation, and on the map soi have an advance payment for that particular Bp of 20 degrees
(They are all random numbers)
Now my injection so begins at 20 degrees before TDC To finish off 10 degrees after TDC
Well now I would like to increase the IQ and bring it to 80mg and by doing so, I allunghera the time of the injection coming in at 40 degrees of opening in the same SOI I finish the injection at 20 degrees after TDC!
now I thought I'd moddare l advance, giving the same number of degrees, i.e. 10 and start the injection at 30 degrees before TDC and terminandolo to 10 degrees after as it was originally.
Here I is the doubt! But as far as I can go with the advances? The example would be right?
And of course, as far as I can go with the increase in IQ

[Andrea1]

Very interesting topic, and your reasoning is right but I think that with 10 degrees more inietterai something more than 80mg. However, if the engine is original I believe you are unable to arrive at the limit of the advances but, if supponessimo to have oxygen in abundance once you get to 50% and then decide to change the nozzles to the parity of diesel fuel injected you will notice an improvement

[project]

Hello andrea, it would be nice if someone who knows there spronasse with some help! however, those are the numbers given at random just for example! what I would like to know more or less where can I spimgermi with the advances,which obviously should be data informed, and for this reason also that I do these questions.
with inietori with more flow I would have times more short, I know pero let's say talking about with the injectors, ori what are the limitations I have in regards to both advance that opening!

[Andrea1]

On the limit, I can't help you because I think that also varies from motor to motor..
what car are we talking about? jtd?

[project]

no anyways I wanted to make a speech more generalized I do not believe that the various so much, I would try on my car pero here I would also like to a moment to know what I'm doing before doing any serious damage!

[Andrea1]

I believe that a little change if we consider that not all types of motor have the same injection angle and not have the same bore (though perhaps a diesel is not so relevant as in a petrol) and then there is to see the amount of diesel fuel.. before avvinarti to the limit where it is advantageous to change the injector with the mechanical original and thou shalt make a smoke black to close the trade for 3 years.
I was talking some time ago with some guys who were studying a tdi and noticed the difference of the injection timing data in degrees on the map thing they had an advantage a little bit in the accounts but said they could not go beyond a certain number of diesel and did not want to exceed 4500 otherwise it would have lasted a little, something that according to them, if they had a jtm would have been able to go a little further.

I do not think that there is a percentage increase that is suitable for all the engines but not only of the value of advance of injection, mind you!

Damages in advance suitable to the number of fuel you want to inject I do not think you can make it, because as the first limit usually meets the turbo, it forces those nasty clouds of black smoke, that will increase your exhaust temperatures... this would be to keep an eye on if you are going to push a little on injection.
You'll see that if moddate with policy, you will not have problems, maybe a little effect to the wall, but just do not overdo it.

[il matto]

A very interesting debate, for example, I have found personally that on the 1.9 TDI 130 - 150cv a duration of 38 is the ideal, but without, however, to understand why concrete.

[project]

You obviously, increasing diesel you must increase the air of course, otherwise it smokes! Ignoring this, I said as much as you can get to increase the advance payments on the basis of the times and where I will be forced to change injectors!
Following the logic of the engineer who made the map ori, giving the same degree of the advance that we give to the duration should not be a change then so wrong given that you keep the end of injection, as designed by ori let's say for motor type so as not to go in the post combustion! My doubt is ok, I've added 20 degrees duration can I give it safely to the SOI, or can I get to a certain advance after which I will have to change the injectors to reduce the duration?

[munro]

in the discourse that do not take into consideration the pressures inside a cylinder,...
remember that for each degree of anicipi injection in the diesel you speak of 10 bar increase in the pme...
the engineers when they adjust the advance payments on the diesel carefully monitor the pressures in the combustion chamber with special equipment and test...
then those who said that giving advance into the diesel does not do damage, but it only has the effect of "the wall" perhaps he has never built/mapped it truly is a diesel, high-performance...

[munro]

I wanted to add that I on the tdi 8 valve I arrived at 45 degrees of duration at 5500 rpm of course not, with the motor configuration stock...