Start of Injection Delay

[GTS]

Quote:
Originally Posted by 907dave
Way off topic but what would be the point of increasing the MFD map to over 100 at WOT? To me, it appears to be an easy way to indirectly increase the injector pulse width above and beyond what is commanded in the multiplier map. For instance, if your max MFD is 100 and it gets you a certain PW at a certain RPM/ICP, then increasing the MFD to 110 or higher will allow the PCM to calculate (using RPM/ICP) what the new, higher pulse width should be. It's a way to get the popping and stuttering that you hear in a lot of sled pulling videos too.

What do these numbers actually represent? The MFD map represents mg/stroke per injection event. It's a direct quantity.




OK so this brings up a question or two. So you say the MFD map represents actual MG/Stroke. We all know that that can vary hugely depending on the injector and nozzle. I always assumed being it seems like this is a 0-100 scale that it was more of a percentage scale 100 being max MFD. So what is the max MFD that is recognized? I noticed when running AE on my current tunes I was only hitting a max of about 80 MFD. I was going to start by modifying the MFD to come in to 100 at the max TPP voltage that I’m seeing. But if the scale goes above 100 how far could or should a guy go with it? Or does it really continue to ask for more fuel past 100?