July 25th Autocross at McCarty Ave

I had Sunday morning free, so I made the first heat at the McCarty Ave autocross. My first of my three runs was the fastest, a 37.1 followed by a 37.3 and then a 37.79.

That 37.1 was pretty respectable, the fastest street tire time as far as I can tell and earning me 2nd place in the three car SM class. Of interest this time around is that I recorded all of my runs and then reviewed the video that evening. It’s clear where I lost a lot of time pushing wide – a sweeper leading into the final WOT section. I’m hoping to actually begin uploading these videos, since I have a computer that can process the files now.

I also splurged for the $6.99 Trackmaster app for my android phone. I had some technical difficulties since it was a last moment decision, and I didn’t have a well-thought out place to stick the phone. The app requires you to tap the screen to begin logging, so it had to be accessible, but also someplace where it wouldn’t slide around the car. To make a boring story short, I ended up with data from only my last run, so most of the use of the data (comparing runs) went down the drain. Still, I definitely see potential in the program.

The developer of the app has solved one of the biggest problems with phone DAQ – low refresh rates. The phone’s 1hz GPS is not very accurate. Adding a bluetooth external GPS and another phone app will allow collected data to be 5hz. Maybe higher? I have to investigate. But I believe it holds promise.

Combining the video and data is still a long way off though.