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Two Wheelin posted by matt5 on Jan 9, 2022 at 7:15PM

Matt5 is back on (motorized) two wheels! After a few of my buddies have recently purchased new bikes, I started thinking perhaps I too could (re)-join the motorcycling community. When we first moved back from Australia in 2013 I wanted a bike here to replace the once I sold in Melbourne, however witnessing the quality of drivers on Atlanta roads and not having a garage, I deferred the decision. Now, nine years later with a bit more confidence on the roads and having rented a bike on Twisted Road in October, I was smitten.

After heavily considering getting another Kawasaki Ninja (although this time a 650R), I made a somewhat impulsive decision to go with something different. So without further adieu, please welcome my new Yamaha XSR700:

More posts are to follow!
Whine, pop, vroom posted by matt5 on Sep 16, 2021 at 10:35AM

Man, it's been a minute... The time/space continuum wormhole that is COVID has resulted in a dereliction of my duties to my loyal Matt5lot10 followers. In large part because 2020 was most uneventful - few track days, AutoX, no traveling, etc. Also laziness.

But it's 2021 now and although we're still in the COVID times, thing are happening. I'm not going to make this a massive post following up on what I've failed to post in the past year, but rather focus on one thing in particular... the BRZ. She has gotten a kick in the pants, now featuring a Cosworth supercharger. She's making 338whp / 265 wtq when on E85 which is pretty great in a ~2700lb car. And with the added power, she now has added aero to keep her firmly planted on Earf. Here is a video of a hot lap at VIR from the Friday, September 10. It was an absolute hoot!

2020 posted by matt5 on Aug 15, 2020 at 4:30PM


Well this is a shit year

Latest Run at AMP posted by matt5 on Oct 29, 2019 at 6:48AM
Here's a video of one of my "fast laps" at AMP the other weekend as part of Jzilla's ExoFest - it was a perfect day for the track - sunny and cool at 72F. The only downside was I didn't swap in more aggressive pads before the day, which left me with sponges at turn 1 and turn 6 and likely kept me from getting below the 1:40s:

Cross of the Auto posted by matt5 on Aug 27, 2018 at 10:59AM

This past Sunday marked my first AutoX event with a couple of buddies at Atlanta Motor Speedway. While the day was hot, sweaty, and hungover (thanks to Jay's He-Man Juice the night before), it was an absolute blast.

The experience was very different than HPDE events I've done in the past, arguably AutoX is a different animal all-together. Honestly the most challenging aspect is actually finding the course on the first couple of runs. Unlike HPDE events which are on road courses (which have little to no variability in the route), Auto Cross (or AutoX for the initiated) uses large parking lots and "gates" defined by marker cones, where the driver has to learn the course while trying to set their best time on that course. Each vehicle is "spaced" safely from the vehicle running the course ahead and behind them, so there's no pressure of other drivers or risk of collision. Additionally, unlike HPDE, the drivers are also required to "work the course" when their run group is not running, by noting cone hits or DNFs, and ensuring the cones are in their correct position. BMW CCAs AutoX allowed 8 runs, with a time penalty of 1 second for any cone hit and a DNF for any "missed" gates. Comparing HPDE to AutoX, I'd highlight the pros and cons of AutoX as follows:

  • Less risk of colliding or damaging your or others' vehicles
  • More ability to "push the limits" of traction and control
  • No pressure from other vehicles on the course, having to provide "point-bys" or anticipate other driver's behavior or course
  • Less risk of a "money shift" since you can pretty much stay in the same one to two gears throughout the course
  • Greater "appreciation" for the event since you are both a participant and a course worker
  • Exercise (e.g. running to pickup cones, monitoring your assigned sector, and "on your feet")
  • Less expensive
  • Challenge of finding the route/course crowds out/distracts from the ability to identify braking zones, apexes, etc
  • Lower speed and less distance does not lend itself to better understanding your vehicle's handling characteristics in dynamic environment
  • No "persistence," so once you learn a course, it's only good for that day - the next time you return, it will be a different course
  • Less seat time
  • Less technical in driving requirements (e.g. no shifting or heal-toe required, limited benefit or opportunity for trail braking, little to no elevation change)
  • HOT!
I will absolutely attend another AutoX event, although I may wait for sub-90F weather and I will likely better limit my alcohol intake the night before.
Home Automation Breakdown posted by matt5 on Feb 26, 2018 at 7:07PM

Since purchasing our house (or rather 20% of it) in September, I've dived head first into home automation. It's turned into a hobby, as it combines a lot of my interests - computing and virtualization, lighting and electrics, and working with my hands. A lot of friends and colleagues have expressed an interest in home automation, so I decided to put together a short guide around what I've done and what's worked for me. Before I lay claim that I have derived this information all on my own, I must admit it's an amalgamation of information from forums, Amazon.com, friends, and neighbors (hat tip to Brian, if you're reading).

Choosing a system

This is very much a developing industry and technology, and in many ways is still immature. There are many offerings from many manufacturers leveraging different protocols and technologies. It definitely follows the adage, "Fast, cheap, or good. Pick two." Definitely do your research as depending on which platform you choose, you can get locked in, as not all "Smart" devices play nice with each other. The key things to consider are:


Some platforms are more expensive than others. Not only are you looking at upfront costs, you also have to consider subscription fees for things like cloud storage, application or plugins, etc. Ikea has a new offering that is supposed to be cheap and easy, but it's not extensible. Apple has HomeKit which is on the more expensive end, but requires less "fiddling," at the expense of extensibility and customizability. Google Home or Amazon Alexa support some native "Smart" capabilities, but they're not true smart platforms (see protocols and efficiency below)


Some platforms have more community support than others, which include both troubleshooting, device support, custom logic and device handlers.


It kind of goes hand-in-hand with support, but open platforms allow developers to contribute to and expand the functionality of different devices, which tends to happen faster than the vendors themselves integrate their solutions. A good example is thermostats- EcoBee (which is what I use) has Samsung Smartthings (which is what I use) support, but there its functionality pales in comparison to a custom device handler that a community member wrote. Smartthings also includes the ability to install community-develops SmartApps, allowing for advanced orchestration and automation

Protocols and efficiency

Many devices mark themselves as "Smart," but it's more a marketing term than anything else. Just because something has Wifi connectivity doesn't inherently make it "Smart," and WIFI is definitely not an ideal protocol for smart device networks due to its power requirements and design. Below is a quick rundown of the different "Smart" protocols:
  1. WIFI - many appliances, thermostats, doorbells, and cameras leverage WIFI for connectivity into a the "smart" platform. While WIFI is appropriate for some of those devices (e.g. a doorbell), it is pretty inefficient for most devices. You have to take into account what WIFI was designed to do - handle a large volume of network traffic, with emphasis on throughput and speed at the expense of power and simplicity. While a WIFI plug, bulb, switch, or camera may work for your needs, they also add significant overhead in terms of number of devices, chatter, and traffic to your home wireless network. WIFI cameras in particular can bog down a home wireless network due to the low latency, high bandwidth requirements of modern 1080p or 4k cameras. Additionally, range can be limited with WIFI and you have to take into consideration distance of devices from your wireless router/access point. Generally speaking, "Alexa-enabled" or "Google-Home" enabled devices are simply just WIFI devices, which means no smarthub is required
  2. Bluetooth - Apple Homekit uses bluetooth for some devices, where you can use an iPad or AppleTV as a "smarthub" which acts a bridge between a TCP/IP network and bluetooth devices. Many "smartlocks" use bluetooth to interface directly with a phone or Homekit. While requiring less power than WIFI, bluetooth has even more range limitation, often requiring line-of-sight distance from a phone or an AppleTV to work. Additionally, Bluetooth is a relatively insecure platform. The newest implementation of it supports encryption, but few vendors are currently implementing it effectively. Needless to say, I wouldn't want my home's physical security subject to the vulnerabilities to Bluetooth (ie a door lock)
  3. Zigbee - a purpose-built home automation technology, it is a low-cost, low-power protocol. It is gaining popularity but is inferior to Z-Wave (see next point) due to lack of interoperability, fewer device and manufacturer support, and lack of forward- and backwards-compatibility. You'd need a smarthub (e.g. Samsung Smartthings, Wink, Wemo, Homekit, etc) to bridge between your wireless network and zigbee devices.
  4. Z-Wave - a purpose-built home automation technology, it is low-cost, low-power, and has the widest manufacturer and device support. It operates at 900MHz so it doesn't interfere with WIFI networks (2.4GHz or 5GHz), although it could interfere with a cordless phone (although who uses those anymore?). Being lower powered, z-wave is good for wireless devices (e.g. motion sensors, door sensors, etc) All Z-wave devices can talk to all other z-wave devices within a network. Additionally, Z-wave devices act as a mesh network, so the more devices you have in your house, the stronger your network. Z-wave will allow a maximum of 3-hops among devices to transmit to the hub, which is nice. So you could hit a smartswitch at one end of the house, and the signal will "hop" to another switch, to a smart outlet, to your home hub. You'd need a smarthub (e.g. Samsung Smartthings, Wink, Wemo, Homekit, etc) to bridge between your wireless network and zigbee devices. I've standardized my home on z-wave devices.
  5. Thread - a relatively new wireless, low-power home automation protocol founded by manufacturers such as Google (and Google-owned Nest), Samsung, etc. I don't know much about it, but a quick search shows it's based on Zigbee technology and should mirror Z-wave in terms of functionality

General Tips


There are lots of "smartbulbs" such as Philips Hue or LifX which change color, dim, and turn on and off with a smartapp. I initially started looking at Philips Hue as an option for lighting, but quickly found that it did not meet my needs. It's expensive, requires its own hub device, I didn't need the color changing features, and I had read it can be unreliable. I did a bit more research and stumbled on Z-Wave smart dimmers and switches (I use GE Z-Wave smartswitches, but there are other options such as lutron). I like using smart switches rather than smart bulbs since I can continue to use traditional light fixtures and bulbs and can control the lights via apps or via the switch itself. Also, it fully supports three-way and four-way switches (e.g. when you have two or more switches in your house that control the same light(s)). The downside is you have to be comfortable with home wiring and replacing traditional switches


I did a ton of research into cameras and ended up choosing Ubiquiti Unifi as it suited all of my requirements. Most notably:
  • Wired - I didn't want to use wireless cameras for both security reasons and because I didn't want to saturate my wireless network with camera traffic
  • Power-over-ethernet (PoE) - Power-over-ethernet is as exactly as it sounds - you can both power and receive camera data via one ethernet cable (e.g. Cat5E or Cat6). This eliminates the need for finding a power source or plug nearby, or worse, having to use and recharge batteries
  • No cloud storage required - I really did not want to pay a subscription service for cloud storage of my video footage since I have a perfectly good (albeit old and slow) NAS at home. Cameras such as Nest or Ring require a monthly or yearly cloud subscription. With Ubiquiti I can specify how many or for how long to store video footage Linux support for the NVR - probably not a big consideration for you, but I really wanted full control of my NVR and the ability to install it on Linux since thats primarily what I use for my home lab and setup. Ubiquiti Video NVR also supports Windows and Mac, so you'd be okay there.
  • Advanced Motion zones and detection - I can define motion zones to monitor (and not monitor) to trigger recording as well as specify the duration to record Camera NVR - if you don't want to go with Ubiquiti cameras (they are relatively expensive) take a look at Foscam PoE cameras and BlueIris NVR software

My Setup

To give you an overview of my setup, I'm using the following:
  • Samsung Smartthings Hub
  • Using WebCore for advanced logic and orchestration
  • Ubiquiti Unifi Video Cameras (for external cameras and security)
  • GE Z-wave smart switches
  • GE Z-wave smart outlet
  • Ecobee v3 thermostats (I deliberately chose v3 since I didn't want or need the built-in Alexa functionality in v4)
  • Ring Pro Doorbell
  • Foscam wireless camera (for internal monitoring and recording)
  • Ecolink motion sensors (for internal and external motion
  • detection for security and light automation)
  • Ecolink rare earth magnet door sensors (for door monitoring for security and light automation)
  • Google Home
  • Google Chromecast

Mazda Miata on AMP posted by matt5 on Apr 3, 2017 at 7:50PM
After about 9 months of having the Miata, with which Lydia learned how to drive a manual and she tracked for the first time three weeks ago, I decided to take it out to Atlanta Motorsports Park to test it's grit, and it ended up testing mine.

The best word to describe the first few sessions: frustrating. Having tracked the BRZ nearly a dozen times at AMP I had gotten comfortable with the lines, brake zones, and corner speeds in that car, which I quickly found did not translate directly to the Miata. Not that the BRZ is a power monster, but compared to the Miata, I could miss an apex or deviate from the perfect line and still run 1:43s consistently. Not so with the Miata. One bad corner, a little too much application of the brake, or deviating from the race line at all, and I was hanging in the 1:51s (not great).

But by the second half of the day, once I had gotten a better feel for the car, learned the near limits of the tires and suspension, it became much more fun. Once I accepted the fact that I'd be giving point-bys most of the session, when I found myself some open track, the car was amazing fun. I could carry a lot more speed through certain corners, I could brake later in others, and I could hold tighter lines than in the BRZ (and certainly than in the understeering STI). Perhaps it was having the top down, not having any electronic nannies, or the direct feedback from the steering, but I certainly see the appeal of the NA Miata on a track like AMP.

At the risk of coming off as condescending, there is a certain pride of hanging with more powerful cars. The occasional time I earned a point by from a late-model mustang or E36 BMW was all the more rewarding. The thing about the Miata is if you don't get your braking just right, or hit your apexes perfectly, you're in for a frustrating lap. But get it right, and every second off your previous time is all the more rewarding.

One item of note is by the end of the day, I was pretty beat up (physically). Having the stock leather seats and original 95' suspension led to a lot of leg and knee banging against the door and transmission tunnel. Some Sparcos, a race harness, and some new coilovers with a bit of life left in them would serve this car well.

Would I take the Miata on a faster track like Road Atlanta or Roebling? Absolutely not, unless I had a penchants for masochism. AMP or Barber? If the weather is alright, and of course, with permission from Lydia.

An Oldie but a Goodie posted by matt5 on Jul 12, 2016 at 1:54PM
Back in 2009 for my undergrad Economics degree, I authored a Senior Thesis entitled "The Efficiency of Software Development Models: Proprietary vs. Free/Open Source."

I've since dug up the paper and gave it a re-read and reminiscing in my days of Econ and IT wonk, so in the spirit of Open Source, I've uploaded the paper to matt5lot10.

Here's the abstract from the Thesis

The market for software is in many ways distinct from that of any other good due to software's strong network effects, imperfect public-good nature, and complexity. As a result, the free market has two primary means of delivering software to consumers: the proprietary method, and the free/open source method. These two contrasting methods of software production may appear to be mutually exclusive, and many believe their coexistence to be unsustainable. This study investigates the theoretical and empirical literature regarding the rationale and motivation for, and welfare impacts and overall efficiency of, each software development model and how they interrelate. We can conclude from this study that these two models are in fact not mutually exclusive and in some cases complementary, provided certain market conditions are met. We can also conclude that the open source software development model is in fact consistent with economic theory and is thus a sustainable method of software production.

HPDE at Road Atlanta posted by matt5 on Jun 24, 2016 at 10:43AM
I had my first HPDE event at Road Atlanta couple of weekends ago - hands down probably one of my favorite tracks - it's a toss up between Barber and RA. Overall the day went well, however one driver had to be medevaced:
2013 Subaru BRZ NA Build posted by matt5 on Jan 25, 2016 at 1:12PM

So after owning the BRZ for 2.5 years with no power upgrades, I finally bit the bullet and installed some goodies to give it a bit more power and help reduce the all-too-familiar torque dip on the FT86. The upgrades performed this past weekend include:

  • Moto-East Flex Fuel Kit
  • JDL UEL Header
  • ISR Overpipe
  • EcuTek Tune

All told, the modifications should add about 30whp, bumping it up from 175 to 205.

For your viewing pleasure, here's a timelapse video of the installation. Lots of standing and talking, but that's part of the process

STI, Bro posted by matt5 on May 13, 2015 at 2:18PM
Rather on a whim, I've picked up a new toy:

In a serendipitous procession of events, the TooheyMobile is no longer in the stable, as it had to be surrendered to make room for the new toy above.

Nothing was inherently wrong with the Subaru Legacy - in fact I parted with it rather regrettably, but I just couldn't turn down the deal on the STI. I happened to run a search on AutoTrader one Friday for "wanted cars" (as I'm apt to do), when a new listing popped up from the same dealer from which I purchased Zed. Having no photos and a limited description, the ad was austere, but two very important data points were present; mileage and price. Recognizing the potential deal, we hopped in the Legacy and headed over to the dealership to scope out the car in person (mostly just to confirm that the listing was in fact not a mistake). Before I knew it, I was signing paperwork and organizing finances, all before actually having the opportunity to actually sit in the vehicle, let alone test drive it. So for all of those curious, here are the stats (and essentially why I took the plunge):
  • 2004 Subaru Impreza WRX STI
  • 36,000 miles
  • One owner
  • Relatively unmolested
  • 20% below KBB value
Did I need an STI? No. Did I spend too much money? Probably. Am I glad I got this one? Absolutely. Check out more details on the 5Drive page
Welcome to Matt5lot10.com posted by matt5 on Oct 9, 2012 at 1:57AM
Welcome to Matt5lot10.com. I can't make any promises about how interesting this site will be or how often it will be updated, or even if it will really host anything of any consequence. I can, however, promise that no matter what it is, it will be entirely Matt5. In the coming weeks, I'll be hopefully populating additional content, including pictures, media, text, and even a little bit of video. For the time being, feel free to bask in the glory of Matt5lot10.com and let your imagination run rampant with what its future may behold. Either way, prepare yourself for a surprise. I am.