Originally Posted by Ziggyrama
You got it reversed. SD logging is significantly faster than normal logging. The sampling rate is still tied to the number of parameters but it is MUCH faster. To give you an idea, I am collecting 15 counters and I get about 35 samples per second, where 1 of the counters requires extensive calculations (those slow it down). So, I am running slower than normal 15 counters would. Normal logging can't touch that kind of rate.
Sweet. I'm so glad I found out about this haha. I have mine set up to start logging during throttle opening angle above 60% and if there is any knock above 2000 rpm. It stops logging when rpms drop below 2k. Such a neat tool!