Modification times of an overboost: yes - no

[tidus1985]

I found myself having to work on the timing of an overboost on my car a 147 1.9 jtdm 120cv, because after fitting downpipe and airbox with ramair, the pressure was raised to 0.3 bar 1.8 bar peak, and then put down to study the operation of the dutycile valve pierburg and its control in pwm related to map an overboost, as with the original map, the problem was not an issue, this is because having the downpipe there were fewer pressures, the same is true for the filter is more permeable allowing the suction of the best in the air, then back again to the subject of an overboost for me ? been necessary to go to modify this map in a devrescente and targeted because I had rpoblemi peak of 1.7 bar, even gas zoned type 50%, problems that arose with active cruise control on the climbs. all solved by rebuilding the map with an overboost from the ori that, watching it now is painful, the valve in the rest position by depression of the actuator, the actuator in the depression means profile low rpm of the turbine, and thus the maximum pressure by lowering the values in the map will increase the openings for the pwm valve opening several times on a single step lowers the depression is useful for maintaining the geometry and configuration,low speed and then we lower the pressure of the turbo compressor of an equal number of turns so values lower lower the speed of rise of pressure and the same pressure, and higher values increase it, everything in the complex inverse of management pwm valve pierburg.

[Cristiano75]

well I see that the turbo is f? to hear more? and otherwise on the map thrust you feel that it's much better in performance! of course, if you only change the boost on the map ori, you hear almost nothing!

I do I change from 1100-1200 rpm's and gi? from the 10% of the load .

The map in question "map an overboost" like all the other maps except that the pedal does not have as a reference % load..... The nomenclature of the ecm, whatever the version ? painful.....
The 2 axes X and Y are diesel fuel(x) and rpm(y).. if you touch the values inside the map updated the reference axis >> X..

I edit only a couple of columns... the rest, sometimes the agreement with those moddate.... depends on how pike over the map objective....

[enzopezzano]

The problem is, he is not me and never happened. I've done several jtd 16 v, with a downpipe and no abnormality occurs in the pressure. usually do not hack.

[Cristiano75]

If you take to limit the prex of the turbo with a significant increase of diesel oil you have to x the force of things, put his hand to the "map an overboost" not to damage the ecu.. try to do a pull with the sixth as well as the 3500gg uphill for example you will see "that if c'? a lot of diesel fuel" as you alzer? the prex from that objective..

[enzopezzano]

Surely it is absolutely right what you say, but just give the right increments to the maps and diesel.

[SandroMarciano]

Surely it is absolutely right what you say, but just give the right increments to the maps and diesel.

no, this speech does not make sense, the Christian has reason, in the moment in which increases in the diesel fuel, at least the peak boost pressure go up?, and if by too much fuel without touching the maps the ecu does not succeed? even keeping the pressure constant.

[enzopezzano]

If you say it. With a diagnosis at hand, I assure you that you do not have pressure spikes!

[mikyrace82]

perhaps you did not grasp what they said Cristian and Sandro...with substantial increases in diesel, you have strong peaks, so much so that if you do not moddano times over, the ecu would not be able to handle the pressure. In the cases pi? obvious leads to a pressure balllerina..

[enzopezzano]

And I had said that it was enough not to increase the maps diesel in an exaggerated way in order to avoid these problems.
I think I have grasped very well seen this ? my work.

[asdone]

To avoid the peaks and not having to sacrifice the reattivit? not c'? a way to cause the intervention of the variable geometry is pi? quick? After the peak, however, the pressure generally reaches the goal then ? only a matter of speed? intervention right?