Brian's BRZ: Painful Lessons in Lubrication
He’d spent years dreaming of driving on a track. Brian Armstrong had grown up hearing racing tales from his late uncle, a former professional stock car racer; and grandfather, a racer, mechanic, and performance engine builder. Even coming from good stock, Brian hadn’t really found a door into the world of motorsport himself. The opportunity finally arose when he relocated from New York City back to his native California in 2021.
Now in a more car-friendly environment, he decided to get a more track-oriented car and explore performance driving. It didn’t take long to choose a vehicle. He wanted a front-engine, rear wheel-drive platform and relatively low cost of operation. It was either the newly released BRZ/GR86 or the latest MX-5. The stars aligned when he found a 2022 BRZ in World Rally Blue in transit to a local dealer for MSRP. He put down a reservation site unseen and picked it up about a week later, in early December 2021.
In Good Company
He started with autocross, attending 4-5 events before graduating to track days. After a couple events, he found 86 Challenge, a local time attack series dedicated to the 86 platform and sponsored by SpeedSF and GT Radial. He started participating in the Stock Class, which allows only minimal modifications to the car, with the intention of setting a level playing field with a low cost of entry to be competitive. “The stock class appealed to me because all the cars are set up the same, more or less. That means your pace is primarily dictated by driver skill.”
The few modifications allowed in street class help showcase the BRZ’s brilliance out of the box; there are no drawbacks to having such a short list of legal upgrades. His car has the following modifications:
Pedders Offset strut mounts and top camber bolts for -2.5° of front camber
17x8” 949 Racing 6UL wheels wrapped in 225/45R17 GT Radial Champiro SX2 tires
AP Racing Endurance front BBK with Ferodo DS1.11 pads and Carbotech XP10 pads in the rear
7mm Perrin front spacers
ARP extended studs
GR Performance Exhaust
And he’s added a couple ergonomic tweaks: a shift knob from Ansix and, for a little added support, he inserted a section of half-inch yoga mat into the factory seat bolsters. It’s surprisingly effective!
In addition to competition, he also found community in 86 Challenge. Having faster drivers as benchmarks is helpful, but the participants also freely share information to help each other improve as drivers.“We record our telemetry data on AiM Solo 2 or RaceChrono data loggers, then share the data on Google Drive, so we can compare. It’s all voluntary, but we all want to help each other get faster.”
They were also interested in diagnosing some of the BRZ’s from-factory flaws. “We’ve also been collaborators in trying to understand and improve the reliability of the oiling system in the 2nd generation BRZ/GR86,” Brian continued. Two 86 Challenge participants had added oil pressure sensors to their cars and started documenting oil pressure drops on right hand corners as early as November 2022. After several drivers in the broader 86 community suffered engine failures on unmodified engines, including a couple who Brian knows personally, this became a bigger focus..
Brian’s analytical strengths helped him delve into the data and contribute to this effort. He instrumented his own car, with help from 86 Challenge drivers @nostreetracing86 and Miles Kodama, and published a video on YouTube explaining the issue with evidence from his car and two others. He also volunteered to test a prototype baffle from Killer B Motorsport and later Verus Engineering in hopes of finding a simple way to mitigate oil starvation.
Ironically, his engine blew the day one in-depth article he’d contributed to was published.
That expensive afternoon at Thunderhill East went smoothly until it didn’t. Initially, when Brian saw a pressure drop to 0 PSI, he first thought a sensor had failed. When he heard that terrible telltale shuddering sound emanating from his engine bay — the one he’d heard so many times in the big-hit failure videos on YouTube — he knew it was catastrophic.
Thankfully, fellow 86 Challenge driver Kevin Schweigert offered Brian space in his garage to suss out the cause of his FA24’s failure. With the pan on Kevin’s garage floor, Brian took a peek. It took two seconds to determine what had happened.
A small piece of metal had broken off the baffle and blocked the oil pickup. “It was a one-of-one prototype build, so these types of things can happen. Verus immediately accepted responsibility and said they would help with the rebuild.” They covered the cost of a new FA24 long block and, through generous donations from the community, Brian was able to cover the cost of labor and additional parts needed for the rebuild.
Second Stab
During this rebuild, Brian took advantage of the opportunity to make some improvements to his oiling system to try and increase durability and decrease flow restrictions, which can decrease pressure to the crankshaft.
His old oil cooler lines had been rubbing on a sheetmetal seam near the driver’s side headlight and there was insufficient protection from abrasion. It could have been a serious issue if not addressed.
Following advice from other 86 Challenge members, he decided to replace the lines with custom built Goodridge 910 AN hoses—as used in the GR86 Cup Car. These kevlar-braided lines are more abrasion resistant, but also feature a larger internal diameter, for less flow restriction. He also increased the size of the oil cooler core with the hope of reducing temps and reducing flow restriction.
His shakedown of the new engine, oil cooler, and a new generation of oil pressure instrumentation hardware at a recent SpeedSF event was auspicious. Everything worked well, Brian was at ease, so he pushed a little harder than normal set a new PB.
Brian’s committed to the cause. His continuing work with Verus aims to solve this starvation issue and the pair is planning to test a new prototype in January. They now believe the primary issue may be related to the oil returning too slowly from the heads to the oil pan, which the prototype attempts to fix.
The community support and innovation from the major aftermarket players have encouraged Brian to continue chancing his baby in an attempt to solve the problem which worries most BRZ owners. Undaunted by the big bang this year, he’s planning on returning to Stock class in the 86 Challenge in 2024. Consider it a testament to a lovely atmosphere among cooperative drivers and an exhilarating platform worth taking a few risks for.
