Hi, Does anyone know what the JECS 550CC injector latency value is? I'm looking at my program in nistune and wondering if it needs adjusting to improve my idle. It's currently 900. Cheers, Simon
sorry, I don't know (I think it needs to go up) but if you don't get an answer here you can always post on the Nistune forum.. http://forum.nistune.com/index.php
I did a search and found this thread directly related to your question? (so maybe use the search function)... http://www.aus300zx.com/forum/showthread.php?t=321254&highlight=injector+latency AndyMac posted? JECS 550's are re-bored injectors, and generally use the same solonoids as our stock ones, so I can't imagine latency being any different at all. However, a calculated K-Value for 550cc is only good for injectors that are all flowing at 550cc/min. If your injectors are flowing at say, 560, then your going to be slightly rich. This is not uncommon with rebuilt/re-bored injectors, or any injector really, and I'd believe that when they say they bench test, they will have a +/- error margin of say 5%, which is why setting your K-value is purely a baseline then you get it tuned. It's also why no-body can possibly answer your question of "how rich will I be running" because no-one knows how much your injectors are flowing...let alone your k-value or your latency value. ------------ but it looks like 900 is around right.. so with any luck you want be too far off.. then again your issue may not be down to that.
Hi Thanks for the response. I had seen that thread. I was in a hurry last night so my post was pretty light on. I found a flow chart this morning stating that my injectors are flowing 560CC at 3bar. It also has dead time of 0.555ms @ 14V / 3bar. So does that mean I should change the latency to 555 from 900? Cheers Simon
I don't think so... that doesn't sound right to me... but then again, I don't know.. i would have tried something a little closer and maybe larger.. but hopefully one of the guys from the other post will comment. but id does seem that you really need the flow rate sheet from your injectors to get it right.
