Chris’ Evora: Penny-Pinching Pays Off

After several successful years in time trials with two different E36 M3s, Chris Mayfield decided to modernize his equipment.

After that came a short spell with a supercharged E92 M3. As fast and capable as it was with stock power, once adding the supercharger, no matter what he tried, it would not put the power down effectively. He then recognized what the limitations of a front-engined, rear-drive GT sans transaxle were — particularly when the power figure creeped too high. The more power a road racing car must handle, the more value there is in moving the center of mass closer to the driven wheels.

Photo credit: JM Photography

Frustrated with the heavy GT, Chris contemplated hanging up his helmet, but fortuitously, a friend mentioned that one of his contacts happened to be selling a European sports car for a reasonable price. This Lotus Evora’s 2GR engine would make comparable power to the S54, and the chassis would be able to put it down quite easily. It also came with plenty of go-fast bits from factory, so it wouldn’t require as much fettling as the heavier front-engine GTs had. Best of all, if it wasn’t what he wanted, he could make a few quick fixes and turn it for a profit. Considering the bargain he got on the Evora, he named it Penny and began tracking it.

Fabulous From Factory

Even in stock trim, the Evora was refined enough for thousand-mile journeys and direct enough for respectable times at more technical tracks. Though its helical LSD would lock abruptly and induce a little more rotation than intended, it was soft in its breakaway, and always communicative thanks to a fast, feelsome hydraulic steering rack.

Having a torquey motor and sixty percent of the weight over the rear axle make the Evora easy to slide in stock trim. 

Before testing the Evora, he’d expected something more along the lines of a heavier Elise, but the bigger brother was far more forgiving. Even in stock trim with excessive body roll, its soft edges helped him clock a 1:58 around Buttonwillow 13CW his first time out — an impressive time for a factory car weighing 3,100 pounds with a tick over 350 horsepower

It wasn’t just the natural balance which helped him log such a lap. The AP Racing brakes, Ferodo DS2500 pads, adequate cooling, a flat underbody, a decently sized diffuser, double wishbones at both ends, and other features that came from factory contributed to a well-rounded car that could deliver lap after lap without faltering.

The bones were clearly good, but Chris had a few critiques of the car which, though extremely capable, was not quite sharpened enough to be placed precisely in every siThe abrupt lockup was quite exploitable in the slow stuff; bordering on over-rotation, but in faster corners like Bus Stop and Riverside, this characteristic wasn’t as useful. When lifting, the car would rotate as expected, but settling the rear with any throttle would induce a little bit of understeer — even without any weight transfer taking place. For this reason, he found himself overslowing the entries Laguna Seca’s T5 and T10 to ensure he wouldn’t be going for a trip through the dirt.

Beauty Under the Knife

Its suspension design requires less static camber than the E92 does, but there was need for more. With the help of custom upper control arms from Fred Zust at Black Watch Racing, Chris was able to dial in 2.7° up front and 3.5° at the rear. Not much for a full-on track car, but ample in practice, as it turned out.

Along with those custom arms, Fred Zust specced a set of custom Penske 7500 two-ways to sharpen the car and keep the aero platform level over — a must with the elements Chris had planned. With high school friend and founder of Zebulon Ryan Neff leading the charge, the two ran a series of 3D scans to devise the right aero package for the Evora’s sleek but surprisingly draggy body.

Even though the coke-bottle shaped Evora is a sports car, the weight and power produced give it some GT-esque traits which Ryan addressed in his aero design. With this car, he adhered to his typical philosophy for heavier, front-engine cars when designing the aero package: the front gets precedence. Generally speaking, the Evora needs more aero loading at the front axle to get the desired balance with a car like this. So, Neff built the six-inch splitter — which provides the ideal combination of downforce and efficiency — from the front of the bumper and extending all the way to the front axle line, where is blends seamlessly into the factory flat floor.

At the rear, Ryan devised a mounting system which would save Chris from having to hack up the beautiful rear clamshell. Only two holes in the rain gutter were needed to attach the mounts, which connect to a support that bolts directly to the chassis. Ryan’s careful touch is obvious in the design of the two elegant swan necks that pass through the panel gaps between the rear clam and the fenders.

The finishing touches on the first iteration of the aero package were: a set of skirt extensions which widen the surface area of the floor, and bolted on a set of his “ankle cutters,” which manage the inflow of air underneath the car. “The cutters function like a virtual sliding skirt,” he added.

To top off this first round of aero additions, Chris stuffed as much tire as he could fit under the factory bodywork — with 265s up front and 315s at the rear. The car wears its tires well and doesn’t necessarily need a massive footprint, but if the fender wells are wide enough to make room for more, he realized he may as well.

In its second iteration, the Lotus was swift enough to cut seven seconds off Chris’ previous best at Buttonwillow 13CW in the second session that day. A 1:51 is something to rejoice, but he couldn’t be happy too long — at the end of that exciting day, the factory powertrain showed its shortcomings. Simply put, the crankcase ventilation system was not built for 1.5 G and dumped too much oil into the intake manifold; choking the motor and breaking a ringland.

Thankfully, this didn’t mean his budget supercar would be breaking the bank. These Toyota motors have been used in a wide range of cars; making them cheap and plentiful. In went a new motor, to which Chris fitted a set of aftermarket stainless headers for a total of 360 horsepower and 300 lb-ft of torque.

There’s a planned diffuser on the way, as well as an OS Giken 1.5-way differential, which should make the car that much more accurate and predictable in the faster corners. There’s talk of turbocharging the engine for 500+ horsepower, but that’s still undecided.

If Chris does decide to venture down that route, a platform this strong, with this much aero, a friendly balance, and a great deal of mechanical grip should make great use of that bump in power on the track — unlike his old E92. It may be the best test for a versatile chassis like this. Perhaps it will cease being the friendly thing it’s been, but then it’ll be hard to complain when the times continue to drop rapidly. For the money, Penny has provided far more than most cars in this class ever could with similar levels of work invested.

Speed SF Challenge 2023 RECAP

Speed SF’s committed clan of drivers kept the Challenge season full of excitement this year. The competition was fierce throughout most of the classes, the fields were full, and the number of new course records — nearly a dozen — proved the rapid rate of evolution, both from car and driver.

In S1 and SX, Steve Melson was our standout. His more-is-better approach to track days; running his McLaren 765LT, his Audi R8, and his Mercedes GT S simultaneously, proved he knows how to make the most of his (seat) time.

Unfortunately, his busy schedule prevented him from attending the required number of events to qualify for a podium place, but his occasional appearances were filled with laps thanks to the triple-session approach he’s made his own. Still, even with relatively few appearances this year, Steven was able to set a new S1 record at Laguna as well as a new S2 record at Thunderhill West. We look forward to seeing him next year.

Steven’s McLaren is, without a doubt, the fastest stock car currently in our ranks.

In S2, George Brooks, a newcomer to our series, established himself as a front runner from the start. His potential was clear after winning the second event, and the combination of consistency and his C7 Corvette’s acceleration kept S2000-driving Champion Gary Yeung on his toes. George's early-season pace wasn’t a fluke, either – he proved himself quick at numerous circuits with front-running positions all throughout the season. In fact, George did not miss a single event this year.

His commitment paid off; culminating in a double-points victory at the season finale at Laguna. Though George’s effort could not beat Gary’s outright pace in 2023, we have no doubt George will give Gary and the rest of the S2 contenders hell this year.

A simple Corvette and good support helped Thomas find his potential quickly.

Newcomer Thomas DiGioacchino rounded out the podium. His C5 Corvette and his driving improved considerably over the course of the season, and his five podiums stand as testament to the fact that, even with relatively little experience, putting yourself in good hands can help you hone your craft quickly.

On top of the regulars, there were four reclusive geniuses making up the ranks this year — each of their one-off wins kept everyone guessing. Seigo Ma (S2000), Steve Melson (Mercedes GT S), Kai Anderson (Camaro ZL1), and Tailai Lihe (Supra) might not’ve been in attendance every weekend, but they didn’t need to be to stand at the top of the podium.

In S3, we saw the closest title battle among any of our classes. It was Spencer Kimball and his well developed E92 M3 who eventually took the crown, but Legend Brandenburg in his modestly tuned Supra kept most of us guessing. The title wasn’t decided until the season finale — where the difference between these two was a mere eight points. Legend took the win that day, but it wasn’t enough to offset Spencer’s dominant performance from February to December.

Spencer’s M3 has had all its issues addressed and now puts in remarkable times consistently.

Tailing closely behind, mainstay Joe McGuigan in his recently sorted IS-F made the last step of the podium, and, it should be said, kept Legend and Spencer honest throughout the season. Also worth a tip of the hat was Ken Cemo, who attended every event and drove his Camaro exceptionally well. His upbeat attitude and commitment slate him as a future podium finisher.

Sean’s tidy driving made him the dominant driver in S4.

The S4 field was by far the largest, with thirty-three competitors and a close battle between S2000s at the top three steps. Sean Win-Yepez followed the wise words of Aki at Blacktrax and kept his S2000 simple and the changes minimal. Additionally, Sean started running double sessions to maximize seat time. This allowed him to run most of his best laps in the Gold Open Passing group, which reduced the pressure and made it easier to set a hot lap. With seven wins and eight new lap records at the end of the season, Sean’s holistic approach had clearly paid off.

While Sean set the S4 standard this season, it was wildman Nate Hackman in his milder S2000 sliding close behind and providing the entertainment. His flamboyant driving style was not merely exhilarating to watch, it was seriously fast; his bests often just marginally behind Sean. Maybe Nate will max out his allotted points in 2024 and give Sean an even tougher time.

David Haro snuck in a solitary win — another gold for the S2000 clan. We anticipate the other S4 contenders — Scott Smith (987 Cayman) and Patrick Chio (E46 M3), winner of the S3 season finale — nipping at Sean and Nate’s heels throughout the coming season.

Patrick (M3) added a passenger seat in order to run in S4 for the final event and showed most of the class his heels.

In S5, the two heavy hitters in the lightest cars traded positions all season. In addition to setting a slew of records at Thunderhill, Tyler Packard took his RX-8 to the title, but that was not certain until the final few rounds. S5 is anyone’s game as long as they show up frequently, as Patryck Sworonski (NA Miata) proved with an equally impressive series of wins and seconds. In the end, Tyler attended one more event than Patryck, and that made all the difference.

We hope to see both new and familiar faces ready at Laguna Seca on February 18th, where this year’s Challenge will officially begin.

On a technical note, our Competition Director Scott Smith has made a few modifications to both base and modification points to further converge on competition parity.

To view our class calculator for the 2024 season, please follow this link.

Rich Bonem's BRZ-Camaro Dilemma: Speed Costs Money

Years of construction work meant his hands weren’t what they used to be, but that only meant that Rich Bonem had to find a new outlet. That and a few objections from his loved ones was why he switched from lapping crotch rockets to time trials in Subaru BRZ which, even in stock trim, was already a fantastic driver’s car. Light, agile, and encouraging, his 2017 BRZ Performance Pack served him well that first year, during which he squeezed in twenty track days—and all he did to ensure the car ran well was add a Mishimoto oil cooler.

The modifications came the following year. With a set of Enkei RPF1s wrapped in 255-section Bridgestone RE-71s, the BRZ was surprisingly capable of near-factory footwork. To make the most of that improved stance, he used SPC’s rear control arms and their toe arms to dial in a track-specific alignment. With 3 and 2.5 degrees of negative camber front and rear, respectively, the car could be leaned comfortably, generate the needed mid-corner stick, and oversteer predictably—just what the underpowered BRZ needs for fast times.

Although power wasn’t its forte, the BRZ was able to be livened up some. Rich tried what he could to squeeze a little more from the FA20 with UEL headers, a JDL high-flow cat, an Invidia N2 exhaust, as well as an OpenFlash Tune. It wasn’t groundbreaking horsepower, but 180 horsepower at the wheels in a 2,700-pound car qualifies it as quick.

With a set of Verus brake ducts topping off the short list of mods, Rich had himself a competitive car he could take to 86 Challenge. “What’s really cool about the 86 Challenge is the fact you can take a completely stock car and compete. Every event has had a great turn out, and when you’re ready to add some more upgrades, there’s a group for you, no matter how modifed your car is,” Rich says.

This car and this competition provided Rich with the realization it sometimes takes eager track rats years to learn. “When you’re competitive in motorsports, seat time is the best upgrade. In just one year, I went from being a complete noob to being one of the fastest guys at the track, and this was due to regular lapping days and the way I gained confidence so quickly. Every lap you push a little harder, brake a little deeper, focus on more advanced techniques, and study the features on the track that are so hard to notice when you’re new and uncomfortable.”

Still, that challenge could only last so long. Eventually, he felt like he hit a wall. No matter what he tried, he couldn’t improve upon his personal bests.

Looking into the cost of getting more power from the temperamental FA20 seemed silly; a little research into Kevin Schweigert’s experience with his supercharged BRZ wasn’t encouraging; things started to break things once past the 350 horsepower-mark. For that reason, Rich decided to leave the underpowered lightweight behind and move onto a new platform.

In addition to brakes the size of medium pizzas and a motor over three times the size of the Subaru’s, the Camaro SS 1LE represented a new challenge to Rich. It was bigger and harder on consumables, but unlike the Subaru, it had a robustness and, crucially, a warranty which made tracking it relatively easy on his conscience.

Not surprisingly, Rich was staggered with the car. The braking performance was stunning—seeing a measured 1.3 G in the heavier braking zones was a big surprise considering the additional half-ton of weight. “I felt my soul leaving my body,” he reflected.

The interior offered plenty of space, the gearbox was sweet, and the general reliability was impressive, too. Therefore, the ease of transition was more than just calming—it was inspiring. “The Camaro really made me feel like a superhero,” he added.

True, some things needed improvement—he added an APR GT300 rear wing and some adjustable rear toe links, then dialed in a little more camber all around. Other than that, it was left stock, because it was more than he could fully exploit at the time of purchase.

If it had any flaws in its driving dynamics, it’s that it wasn’t’ not the chuckable thing that the BRZ was. Still, it compensated for the added size with real stability and, obviously, a lot more motor. He increased the front tire width to match the rear 305s, but in its current configuration, the 3,800-pound bruiser still lacks that urgency that he loved so much in his old car.

For Rich, the dependable, reassuring balance, great high-speed manners, and stress-free lapping were the outstanding traits—outstanding enough to forget about its few flaws.

Good manners and an extremely stable platform gave Rich the encouragement needed to push his expensive track toy.

Except one. That ease of tracking and the obvious challenge kept him from ever feeling stagnant or frustrated, but he couldn’t help noticing the damage done to his bank account. Between track day insurance, gas, tires, and brakes, Rich found he was spending nearly twice as much every weekend than he had with the Subaru. Speed and power were fun, but like Kevin Schweigert realized, they’re not everything.

Brake pads lasted only four lapping days, and the tires two—the massive weight wearing out the shoulders extremely quickly. Not surprisingly, he’d only managed half the number of track days in the Camaro over eighteen months than he had with the Subaru in one year.

For Rich, the Camaro is the simple solution that so many track guys are looking for. “It’s a tried-and-true platform that will work, but I find myself already feeling like I want more. I can make it faster, but to upgrade an already expensive car is just crazy. Now, I believe I’d rather start over with a stock BRZ and upgrade slowly to appreciate the differences each upgrade makes. Maybe a K24 engine swap in the future?”

This journey has taught him of all that which is really important in a track car, as well as the cost restrictions and practical limitations that the starry-eyed builder never really understands until they’ve sunk half their savings into a creation. To win requires practice, and to have fun requires a constant challenge and regular advancement towards that goal on the horizon. How does one balance that? That’s up to the driver and their tastes, finances, and abilities.