Ecumaster forum

Hi,

what is the best way to control 2-4 additional injector on a throttle body sandwich plate ?
if you convert a NA engine to a boosted engine, and the ecu is old-school or complicated or impossible to adjust.
and you have automatic and ESP TCS adaptive cruise control etc etc

So what we do, is install DET 3 and hook up 2 x 1000CC injectors with throttle body sandwich plate.

use DET 3 to pull extra timing on boost.
use DET 3 as boost control 0.6-1.2bar
use DET 3 for MAF / map conversion

NOW we use PWM2 to control injectors on 100HZ and controll with boost and RPM from 0 to 80 percent Duty cyle.
(100HZ does inject 2x every 720 degree crank @ 6000rpm and 4x every 720degree on 3000RPM so the lower the RPM, the sensitiever the PWM becomes)

we have EGT sensor hooked up to analog input and adjust injector dutycycle with this from 100percent till 900degree up to130 percent to 980degree.
we also made a circuit with a BOV and a 3way boost control valve so if the valve doesn't get 12V from DET3 the BOV will be connected with a 1way valve on mainfold and will be suckt open on idle.
so there is no possibility to make boost. (incase DET3 doesn't work or stop working.)


BUT is it possible to use DET 3 in FIT mode and use it on the same way ? i can't get my head around it.

in FIT we can pull timing
control boost
control fuel with the right frequentie.
maf/map ??? is this possible ??

FIT mode is possible, test it today

but problem is that i am not be able to use MAF/MAP conversion in FIT mode at the same time.
Problem is we don't have extra analog in to use EGT solution(do to limited inputs or we should connect EGT to CLT imput and recalibrate should be a good option)

positive is that we can use wideband lambda controller and input to DET3

The FIT manual mentions the possibility to use MAF to MAP conversion.
I'm probably going to FIT mode soon, i would like to still get rid of the MAF