FAQ EDC Pumps / W202/W210 W463 ECU’s

barrote

12-22-2016, 05:49 PM #8

(12-22-2016, 03:54 PM)seanyt From dieselmekens edc video i always thought idle was 1.95v with 11.3cc injection.
when im at my home pc i will check the voltage map to see what voltage is used a cc injection.
Ive not had anyone yet exceed the 4.5v limit on the maps ive made so far for people.

Are you thinking of setting idle quantity of 10cc at the 1.25v position?
two issues i think would be, 1.25v is too low for the idle control loop if it wants 1.95 and it would hunt or not idle at all.
another is you only have 1mm of rack travel to completely shut off all fuel through the elements is this enough?

Unless im thinking about this wrong.
I thought the limit for the rack travel sensor was 5v as this is the usual reference for sensors not 6v.
giving a 10% margin for the 4.5v limit.

Ive seen one case on the forum where the pump solenoid was machined to extend rack travel.
this being used by baldurs standalone ecu, this is the only ecu that will give you full access beyond the 4.5v sensor limit for very big HP builds.

You can trick the rack sensor by placing either resistors on the rack reference to get more travel or on the signal to get less travel,
there is also an adjustment at the back of the pump that moves the sensor,dieselmeken used this to gain 1mm travel having idle injection quantity at 5.7mm rather than 6.7 at 1.95v giving 1mm of added travel to the rack.

what do you mean by this
another question is the rack feedback... how needed is the 2000mV for a tune of course....

As said , i´m on the harware side...
And when i´m looking at "mechanically" tune a pump(hardware side) , i look to how much it phisically can put out, then is time to start solving other matters.

The voltages are in the test table sheet for that pump, and idle fuel quantity is between 8 and 10 cc /ml , 10cc for cold when hot 8cc is enough for sustainable idle. voltage is 1.75volts PWM . (i´m not so sure about the values cause the tables are in the shop, but they dont differ too much)(despite i can´t do that in my bench test , cause i have a dc modulator to turn the solenoid actuator)

Then at 3.75 we should have 60 to 65cc, with the 018 553 element, but 018 554 is almost the same, slight high output voltage.
when i install 7.5 in a pump and leave it like this , at 3,75 volt maybe i can have 100cc (12mm actuator travel), and at 4.5 volt maybe it goes to 15mm, but we still have 2mm to go thats why the 5/6 volt is needed. and if i´m not to wrong i can tune the solenoid to achieve 20mm , and this can turn the pump into a super 170cc output beast in 7.5mm and 220cc in the 8mil config or more ....then we have the injection balance and sincronization kind of stuff to deal with, and inject that max , +- 5cc at 6k between elements....

The rack feedback sensor, well as of me i can´t read the miliamps feedback , they say to leave idle between 1800 and 2000. (otherwise idle will not work as it should , hunt , catch , lack of power in recover , return to idle , sustained low return, usually same as the mech pumps .... (thats the function of the screw u mentioned , it should be shimmed to whatever we wish it to be)

Anyway the questions are how low in voltage can the idle be left?, and how much voltage can the stock ECU can put out?, and how does u (soft) tunners need the feedback reference to be (range) ?
regards

FD,
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