I would like to better understand the inside of what I have worked with for so many years from the "outside". See http://www.lolachampcar.com for more info.
Do you have a particular project engine in mind ? Yes, sub-set of V3.3 for highly targeted one to four cylinder 4-stroke fuel and ignition.
We usually call "reverse an existing ignition advance curve" as "alien" logging. Searching for alien on SiteIndex, I found OnlineCourse/AlienIgnitionLogging. Secondary_trigger can still (in recent firmwares) be configured for alien measurements (except for 5cyl), but the alien variables seem to have been ripped from comm.c. Even if they show up on LCD, only useful if they are sent to the PC (like MegaTune) for analysis. Fortunately not difficult to get comm.c send the variables related to alien measurements.
I have read a bit about the status of logging. There is discussion of building hardware to support logging. There are also those who feel PDAs are a better path. I would like to weigh in on the PDA side as there is no value add to recreating the (logger hardware) wheel. A small portion of the hardware data logger work could be devoted to PDA code to generate a log storage device. FAT, touch interface, serial, memory card slot and services are already done. Can someone advise on the current status of group thinking? Is someone working on PDA? The only link I found was a dead end.
I am working with a 12-1 wheel and wanted to clarify a few points.
primary_trigger=01 (for toothed wheel, simple enough)
tooth_wheel=0B (12 minus one is 11 dec which is 0B Hex)
tooth_wheel_twidth1=01E (per other examples, 360/12 is 30 or 01E hex This is where I get a bit concerned. For me, the width of a tooth on an evenly spaced - tooth/gap=1 - wheel would be 360/24 or 15 degrees for the tooth and 15 degrees for the gap. Does tooth_wheel_twidth1 need to be the actual tooth width or the width of the tooth plus adjacent gap?)
trigger_tooth (tooth that triggers what event?? does this describe TDC1 with respect to the location of the missing tooth? Is this similar to the crank index values used by Motec? Is there a "fiddle factor" should the tooth location not fall directly on TDC?)
Thanks