F1_eng wrote:speedsense, I have calibrated many many control units thank you,moved away from that sector quite a long time ago as it get fairly dull, untill requests such as the one being discussed here comes along.
I'm afraid I can't say who I work for but I can tell you it's not Red Bull, it is F1.
And engine mapping is not an engine builder's job, it's a calibration engineers job. I sort of see what you mean, with low level forms of motorsport, the engine builder has a dyno where he can knock up full power runs and get a decent map. That's not proper calibration though. If he is an engine builder, he should be building engines.
What systems are you most familiar with?
"low level forms of motorsport" - never knew there was a Ghetto in racing..
Those of us who work in the "ghettos" of racing that don't have the luxury of work amongst "fleets" of engineers, but rather one or two in a team environment, have to cover every aspect of DA, and every aspect of the controller units with one person and a tech from the company of the electronics, a tech from the engine builder.
Especially engine builders, in "ghetto racing", have to not only build engines, but map them, help the team keep it to the optimum (it's in their interest to do so when racing against another engine builder).
However in spec racing, the lowest form of "ghetto racing", if you know an ECU and the rules, some advantages can be had as the engine builds/maps start at the same place. That's 90% of the racing series in America.
Same can be said for DA units, where analysis experience makes a major difference. There are many techniques in both fields, and that, but a small group of people have an upper hand on.
The units that are common, Bosch, EFI, Pectel, Motec, Magna Marelli, yet to see a Mclaren ECU, except in one case on a Mclaren Mercedes.
So as you and I have hijacked this thread, let's move on to the question we're trying to answer, and that is the presumed Retarded timing and how is it possible to be done.
As has been pointed out by a couple of posters, a retarted timing map would need the throttle plates to be open at least slightly so...
And as the FIA prescribed "filtered" throttle delay map in the SECU, is presumed to be there for gear changes, as a throttle ratio effect, which I presume is for drive ability, I can see the delay working on throttle on but don't know if it exists on throttle off motions.
what say you F1_Eng?
If yes, then it would follow that the possibility of altering the delay by gear number, and altering a high gear with a slower delay, in 7,6,5,4th can be done, so that an off throttle can have a longer delay, thereby keeping the throttle plate open for a longer time, with the ECU installing a dwell/timing map that is "retarded in timing" as an argument or condition of something like- speed vs throttle opening vs gear and vs lap distance to install the map.. (It is not known if the delay of the throttle exists in both direction, on as well as off, the spec sheet only states a throttle rate adjustment through filtering). This is my assumption as to how they would do it.
What do you think F1_Eng?
"Driving a car as fast as possible (in a race) is all about maintaining the highest possible acceleration level in the appropriate direction." Peter Wright,Techical Director, Team Lotus
