For my first try at Spa I was using the OBDlink MX as OBDII scan tool, S8 with GPS enabled, Gopro Hero3+ as camera.
Logging as fast channels:
A/F ratio, MAF, RPM, Fuel trim long b1, fuel trim short B1, Oxy B1, Speed, Throttle, Timing advance.
Slow channel : intake air temp.
Ignore pid capabilities disabled, ignore no data disabled.
I imagine speed comes from the GPS.
Overlaying Speed, RPM, throttle position, intake temp and g's I remarked that:
Throttle raw data ranges from 0 to 78: is it usual? After scaling 1-99 : bizarre but I've seen some video with the same scaling: it's a rounding reason?
G's seams to be in late respect the video especially in braking zones.
Speed very often, in transients (acc, decel), is in late too.
Throttle position in late, in advance, sometime misses the gear changes remaining at 99% , sometimes is biased to 3-4-5% instead of 1.
Are these related to the number of channels logged and to the poor quality of the internal GPS?
Why g's are so in late? Anyone is experiencing the same?
A/F ratio is always 1: quite strange... (It should variate...) someone is also experiencing that?
Thank you in advance
P.S. It would be really helpful to implement triggers to start the whole bunch of things for instance when exiting the pit-lane and stopping when entering the pit-lane, there are so many things to do that sometimes I forgot to start the camera, for instance.
P.S.II I have recorded multiple sessions. I see it is possible to add reference laps (one by one) but not to merge sessions (to have the opt lap calculated ). I solved as described here http://www.racechrono.com/forum/discussion/736/comparing-between-different-sessions
: I think it will be a good idea to put it in the faq (by adding that the app need to be closed and reopened to display the modifications) or to implement a button to merge multiple sessions (already filtered with the same circuit of the main session and maybe already ordered by date-time, having a select all func., or advanced date filtering, stuff like this.. I think someone is starting to hate me.