ecuedit wrote:Hi there,
I know why,
My low pressure fuel pump inside of fuel tank can not deliver as much fuel as I would like to at those low revs
(pressure in the fuel system before the Bosch pump is not stable enough).
This could be compensated a little with rail pressure precontrol value map,
but ECU does it own calculation based on max rail pressure achieved and if you tune the map too much,
ECU will take just as it needs, nothing more (unless you burn out your rail sensor before that).
That's tricky map to tune (will talk about it later in another topic).
My largest injection quantity is till 3000rpm and than drops.
Height pressure Bosch pump in that car can not suck fuel by itself.
Fuel has to be delivered by fuel pump from the fuel tank - we were talking about.
I am looking for new Bosch fuel pump inside the fuel tank.
Stock fuel pump operates at 250kpa and it is able to deliver 150L/h of fuel.
My car needs more. Calculation says that 180 L/h will be enough. I will probably stay at 250kpa (thinking about 300kpa & 180L/h).
This could be useful for others that would like to tune their cars:
Original - Fuel pump Peugeot 406 2.2 HDI ENGINE: 4HX, POWER 98kw
0 986 580 216
Operating pressure 250kpa
Flow Rate 150 L/h
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For tuned car = 250kpa or 300kpa
Flow = 190 L/h (at least 180L/h)
Suitable pump for tuned car:
0 580 464 098 (HYUNDAI: Santa Fe) - 250kpa, 184 L/h
I am attaching the Bosch catalogue.
Ok.But the cars are the same why to upgrade the fuel pump if the two cars are the same with same pump and the one is better below 2000rpm ?
