Sequential transmission problem
Bit of a strange statement to be honest, don't get me wrong but I would see it as a very beneficial add on. As currently people drive i.e. a single seater / k powered rally car etc etc are going for systems like, Motec, Solaris, pectel and the Euro 4 ECU etc.etc.Hondata wrote:It is possible, but difficult to justify for a single user at the moment.
They choose for those systems based upon, TPS based map and the sequential transmission that they use. As explained in previous posts all sequential gearboxes have a different shift time per gear. So a "set" cut time would be a great loss in time and give a very "harsh" shift. Cutting the engine in this way will actually be a great add on to the current features. All the tools are in the system but aren't linked up together. I'm not an ECU programmer but coupling the cut function with ignition retard and a recovery "tool" can't be a lot of work. (sorry if i am wrong)
Said the above another group springs to mind, the Drag racers using the hondata system with a straight cut gearbox. It would be a great add on if the can use a button on their gearstick to cut the engine by advancing the ignition, after that with the 40 ms period of "re-activation" the engine will commence quicker and smoother (so faster times and less gearbox failures).
I really hope that hondata can look into creating an add on to the current cut feature. I believe this would open up a whole new group of clients. And give better results for another large group.
It would be a shame if i would have to switch to an ECU of one of the competitors :(.
To give you an idea of the drag times, Keith Cowie uses the system in this video, together with a motec ecu:
http://www.youtube.com/watch?v=OAvapYS0 ... r_embedded
They don't set 8,4 sec times for nothing :)
Just to add another one to this request...Hondata wrote:It is possible, but difficult to justify for a single user at the moment.
Also using the Geartronic changer system...
as I understand it (and still playing with it at the moment) ideally we just need it to cut for the time the trigger is active.
as a nice to have would be a soft-recovery, but that's not essential.
If I am reading this thread right, then I can use the Full Throttle Shift function.
so if I set this to:Hondata wrote:Use the full throttle shift input. Wire the transmission output to one of the clutch switch inputs (power steering pressure is probably the best). Keep the fuel & ignition retard activation rpm high, set the shift rpm limiter to 3000-5000 rpm.
Fuel & Ignition retard activation RPM - 12,000 (never going to get there)
Launch RPM limiter - 1000
then this will work as required?
I guess a modification to the Sequential Shift Cut Parameters would be cleaner, something like if you could have a check-box for external control of cut-timing or the like?
Out of interest, what would happen if I set it to:
Delay from trigger - 0
Duration of engine cut - 1 (or 10 if the resolution on this is 10)
Reactivation delay - 0
also, when it says resolution is 10, does that mean cut times are in 10ms steps as in you can only cut for 10, 20, 30, etc not 25ms for example?
Thanks for your input on this.
very helpful..... NOT!Spunkster wrote:http://www.hondata.com/help/kmanager/re ... sub=launch
I can read thank you, what I was after is the actual logic and process behind this.