Tuesday, December 3, 2019

Data Analysis on PC/Mac with Track Attack

Data Analysis on a computer is made easy with Track Attack!  Track Attack is an easy to use analytics experience and cloud storage service.

To transfer CMS Lap Timer run data, select the "CSV for Analysis" format when sharing a run from the Run Details screen and share it with yourself via email, AirDrop, Files, or any cloud sharing services such as DropBox, Google Drive or OneDrive.




Import the CSV file into the free Track Attack app on a PC or Mac (downloaded from Track Attack's website).


Enjoy!

Tuesday, November 26, 2019

Phone GPS vs External GPS Module

Here is a comparison between the phone's GPS (yellow) and a Dual XGPS160 external module (cyan) on the same session and lap.  

Phones commonly have a 1Hz (once a second) update rate and use a low cost GPS chipset which results in long gaps between updates and poor accuracy at high speeds; not unexpected since they are designed for navigation.  External GPS modules range from 4Hz to 20Hz update rates and are very accurate at high speeds.

Notice that the lap times are comparable so if position accuracy is not a priority, the phone's GPS is sufficient for accurate lap times.



Wednesday, November 13, 2019

Lots of seat time is all you need to improve your driving... or...

Common advice to those seeking ways to improve their driving is "get more seat time".  In other words, practice, practice, practice.  Fine advice if one has a way of knowing where there are opportunities to improve.  As they say, doing the same thing over and over and expecting different results is insanity!

To improve, one has to have measurable goals and sub-goals and a means of getting some feedback.  All too often, drivers have just one goal, to go faster.

The best way to improve is to get a coach or enroll in a driving school.

When it comes to coaches, you generally get what you pay for so keep that in mind when using a free coach; the quality varies greatly so don't stick with just one coach.  Excellent coaches are not cheap, but the results will improve driving skills and reduce lap times much more than spending it on that cold air intake or "free flow exhaust" you've got your eye on!

There are many driving schools to choose from and many have been reviewed.  Attending schools that are complementary is a great way to expand one's repertoire.  Off-road rally, drifting, and snow/ice driving schools provide new/extreme scenarios that are complementary to road racing skills, as an example.

Next best way to improve is to use tools and resources to provide useful feedback, pointers and goals.

The single best resource on the planet is almost certainly Ross Bentley's Speed Secrets which encompasses books, videos, and coaching.  I've found the Inner Speed Secrets books invaluable, however, they are aimed primarily at race car drivers.  His book on High Performance Driving is likely more suitable for the HPDE/lapping day driver just starting out.  For anyone with some experience on the track, his Ultimate Speed Secrets is likely the best choice.

I've also found these books very useful:
Tools that provide useful (actionable) feedback include lap timers, video,  data acquisition systems and analysis applications that integrate all of these into useful (understandable) visualizations and reports.

Using lap times as the main feedback is like getting a test score without knowing which answers you got right or wrong!  Yet so many drivers never go beyond just looking at their lap times and gut feel about what they can be improve in their driving.

Augmenting lap times with video can be useful for reviewing driving line, steering and throttle inputs (by listening to engine/exhaust).  The camera should be mounted so it captures steering inputs and behind the driver to also see the track ahead.  This can be achieved by using a suction cup mount on the inside or outside of the side window behind the driver; or on a roll bar.

Data acquisition systems range from phone apps to dedicated mid-priced systems (AiM, Race Technology) to complex systems (Race Logic and Motec) costing thousands of dollars.  Each of these systems includes a data analysis (visualization) application to make sense and meaning of the data.  An alternative is to use standalone analysis tool such as Track Attack which is capable of importing data from most of these systems.  Track Attack also supports virtual racing applications Assetto Corsa and iRacing which is great for comparing real world data vs virtual.

While getting the maximum out of data analysis can be a bit time-consuming, one can get a lot from quick glance at the speed graph to spot areas of inconsistencies between laps.  The time slip graph clearly shows where time is gained/lost.  Comparing data with other drivers is one of the best ways to find areas of improvement.  CMS Lap Timer makes it easy to share data at the track via AirDrop and Bluetooth Exchange.

Two excellent books for diving deeper into data analysis areA Practical Guide to Race Car Data Analysis” and “Analysis Techniques for Race Data Acquisition”; not cheap but worth the investment.

Finally, keep the ego under control and try something different :)