assuming you do not wish to mimic the injector duty cycle and want the spray to start at 6 psi and then wish to manually set the levels of injectant...

using either the 2C-D-S or the new offering what do you use? a laptop? is there an X and Y grid? if so how many cells? i searched the website and there seems to be a lot less info that a year or two ago.

TIA

hc

 

Hello Howard,

You can use our very basic PWM fuel injector driver (MF2) to pulse the HSV to map your water/methanol.

The MF2 reads a MAP sensor and RPM. LOAD x RPM =PWM. The unit is a stand-alone system, volumetric efficiency can be corrected by trimmer a series of potentiometers, at every 1000RPM (2K-9K). Boost ramp a linear multiplier to the RPM.


Here is a typical WI map created by the MF2:



This unit doesn't have all the singing and dancing capability as many modern 5th injector controllers but is a good starting point. We didn't develop this any further due to many third party EMS can control water injection as standard such as the Hydramist. more info

 

Richard, my apologies for not getting back to this thread earlier.

thanks for the response, the diagram, and link to the manual. the link has some sort of windows problem so i am unable to open it.

studying the excellent 3D map (above) i note the key for me w re to a newer AI system is the ability to trim as volumetric efficiency decreases after peak torque. the typical progressive setup cannot do this as it generally keys off boost which is constant...

upon further review i find it is not necessary (although it would work) to mimic injector duty cycles if you have a high speed valve and an ability to input delivery values on a cell by cell basis.

what is the AQ input configuration? is it an X & Y graph w cells for load and rpm?

thanks,

howard

 

The AQ inputs are MAP sensor and RPM signal.

X- MAP sensor: 0-5V (3-D mode) or Pressure switch (2D mode)
Y- RPM: RPM (2-12 cylinders)
Z- %DC = X*Y

User has to configure the following:
1) Starting point of the Boost pressure (P.Sw: 3-30psi 2D-mode or MAP sensor: 3D-mode)
2) Ramp of the boost curve (input gain)
3) Select cylinder numbers (2-12)
4) Set the volumetric efficiency curve via 8 potentiometers - 1000 RPM steps.
5) The controller is fully self-contained, no serial link and no laptop.
6) Error tracking Failsafe: flow against user defined MAP.
7) Output to relay for map switch or lower boost.
8) Possible to change settings on the fly.

Very simple to setup.