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Discussion: change advances

  1. #191
    THE AVERAGE USER
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    According to me ? to try, you can't? to generalize. The advance can? be either a positive thing or negative, it depends from car to car.
    Assuming that the map is not thrust you can? also, avoid giving advance, then just try the car and see if it makes smoke from 3500 rpm onwards. In principle you do not need to give advance, but then, if you overdo it with the diesel a little ? necessary.
    If by too much you risk breakage very serious and the car tends to not climb well rpm why? the piston starts to find resistance from the date of the start of combustion due to too much advance. According to me ? better to leave that as a last possible change to the advance

  2. #192
    THE AVERAGE USER
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    Nov 2012
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    on the new multiair what do you think of the advance?

  3. #193
    BEGINNER
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    Aug 2013
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    Citazione Originally Written by emilground Visualizza Messaggio
    According to me ? to try, you can't? to generalize. The advance can? be either a positive thing or negative, it depends from car to car.
    Assuming that the map is not thrust you can? also, avoid giving advance, then just try the car and see if it makes smoke from 3500 rpm onwards. In principle you do not need to give advance, but then, if you overdo it with the diesel a little ? necessary.
    If by too much you risk breakage very serious and the car tends to not climb well rpm why? the piston starts to find resistance from the date of the start of combustion due to too much advance. According to me ? better to leave that as a last possible change to the advance
    Considering that the multiair still do not have them mapped here.

  4. #194
    BEGINNER
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    Dec 2012
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    I will quoto emilground , even if I don't ? a crime, not even on the maps pi? quiet you can? change that by increasing the amount? injected you alluga the time to inietttare of pi?. Concretely speaking to? in the absence of smoke, and no view of the complexity? the correct calculation makes me quote the first post msport on standard maps do not need to complicate your life

  5. #195
    THE AVERAGE USER (OF) L'avatar di faberecu
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    you are sorry .... but the tour what it says... + or - advances the useful result to ****llo-power ... , if we can burn them all without creating excessive temperatures and pressure spikes dangerous for the manovellismi , I say we are ok
    but we can with the engine closed to verify ... or we need to do a test to destruction to find out for sure?

    I personally maps thrusts use 45 points at full load 4000 rpm , it seems to me to work better , I can post the differences in power next week with advances ori and mod
    Last edited by msport (exil77grande); 23-09-2013 at 18:50

  6. #196
    THE AVERAGE USER
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    Apr 2013
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    I'll post my solution:

    I personally having an engine 1.9 jtdm from 120 hp and 8v we have studied above, and after various tests between smoke; hence, and tour braked I conlcuso that the advance for what regards my engine must be given so as not to exceed 8-9 degrees post pms that fall down to 7-6 for a high rpm, and, indeed, the original map advances to 4500 does finish the injection right in the pms, this is due to their alf act that 4000/4500 rpm the motion of the piston ? very fast and it takes some time to detonate the fuel.

    Having said this I what I do: increase the rail usually on maps driven by the 1600 bar the original as closely as arrival also 1720bar at high rpm is usually not more for ncercare to minimize the time of niezione to a high rpm, the increase of 150bar-to-medium speed (e.g. 2500-3000 rpm), then I make the break for the quantity fi diesel that I want to inject, then me the calculation, around you will find a sheet in exel from me posted on how to calculate perfectly time inj engines jtdm, once this is done, I have prepared a sheet exel where I calculation for each number of revolutions of the injection time used in base pressure at that rpm and tinj for that quantity of diesel fuel required-pressure, once this is done the turn in degrees using the formula ((60sec/rpm)/360?)x1000000(usecondi) and I find the time it takes the piston to a degree, (let's leave out that the piston does not go to the speed adjust but effettivamento slows to a stop in the etremita but for the calculation of our advances ? irrelevant), and knowing when to lasts a degree, we divide the onstro time inj for that degree and find how long is the degrees that injection, then subtract the injection time of the advance pretabilito and see if you need to change the advance. this ? my method

  7. #197
    ACTIVE USER (OF) L'avatar di sportknight
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    I personally do not edit almost never advances, however,' if I make a map thrust,I feel the car and I see that smoke,in the laps in which to smoke, do 1 degree of advance,if you smoke still do 2,the maximum cmq 3 degrees and I stop,usually to fix and the car is fine...

    anyway, I wanted to have advice with regard to the advances of the gasoline car,does anyone know how they work?

  8. #198
    THE AVERAGE USER L'avatar di puntospeed1.3
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    Citazione Originally Written by emilground Visualizza Messaggio
    According to me ? to try, you can't? to generalize. The advance can? be either a positive thing or negative, it depends from car to car.
    Assuming that the map is not thrust you can? also, avoid giving advance, then just try the car and see if it makes smoke from 3500 rpm onwards. In principle you do not need to give advance, but then, if you overdo it with the diesel a little ? necessary.
    If by too much you risk breakage very serious and the car tends to not climb well rpm why? the piston starts to find resistance from the date of the start of combustion due to too much advance. According to me ? better to leave that as a last possible change to the advance
    then on the low and medium engine speeds can go slower and braking if you give too much? at full load 4500 5000 rpm, 1 that can 1.5 there are; but 1 1.5: example 2500giri are considered to be excessive?

  9. #199
    THE AVERAGE USER
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    Apr 2013
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    are never excessive if you need to end the injection in the right spot, obvious, and the good does not exceed a certain threshold, if you see we have advances up to 21 degrees on a jtd, I have found the machine that murava to the 27? then what ? limit, then you have to see if and how many do you need, do not give them to the hell

  10. #200
    THE AVERAGE USER
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    I call them what you will, according to me, 0,5, 1 degree on the 3500-4000 to have a bit of aggression in the more we are

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