Originally Posted by
JFB Tech
If you are running the standard ECU and MAP sensor then you will HAVE to have the frequency limiter. I know the frequency limiters are not available any more but I am looking into making them myself. I made a copy of the Turbo Technics 5th injector controller as mine died. Turbo Technics had the octane adjust pins grounded continuously but I found that it works a lot better if they are shorted through an adjustable vacuum switch. You set it so that it only grounds the pins when the inlet vacuum doesn't exist any more (i.e. you're coming on boost). This way you don't loose any of the off boost performance.
Sorry for the up
I am adapting a Mercedes SLK supercharger to my Sierra Dohc and I am trying to delay the ignition by taking the two octane adjustment pins to ground but I do not notice that it delays the advance, I am measuring it with a strobe lamp and I do not notice anything.
(My idea is to use an Arduino to connect those pins to ground when it goes over 0.15 bars and activate a 5th injector, more or less like turbotechniks did)
What I can be doing wrong? I am joining the two wires (brown/blue and brown/red from the 3-pin connector that are next to the coil) to each other and then to ground.
Thanks in advance! And sorry for my low level of English