Piers’ 240Z: From First Principles

Piers Hugh Smith recently took to mechanics through cafe racers — a consequence of lockdown boredom while living in London. Underneath his apartment complex, he began spending his spare hours rebuilding a classic motorcycle with the assistance of battery-powered lights and powertools as there were no outlets in the parking lot available to him.

“It was a 1970s Honda CB550 and it was a total wreck. I found it in a commercial waste site. I took the opportunity as a way to learn about rebuilding engines. It was just so simple and light — I could pick it up easily and install just about everything on my own.”

It also set the stage for his later projects by having a motor quite similar to a modern car’s. “Through some forum trawling and badgering a few friends over the phone, I learned my way around its carbureted inline-four and got it into a reasonable state. In fact, I commuted to work in London for about a year on it — a great bike for traffic that’s much smaller than modern bikes with similar displacement.”

Piers educated himself on the essentials of internal combustion and learn his way around an air-cooled four-stroke motor fairly quickly — thanks largely to his obsessive commitment to understanding the fundamentals, and the simple nature of a classic engine.

The smooth, swooping lines of a fastback had always spoken to him and his aesthetic tastes, which, after deciding to try his hand at restoring four-wheeled vehicles, made choosing the titular vehicle easy.

“I remember seeing a 240Z with the Pandem kit years ago while I was in school — it just blended the original curves of the car with something aggressive, but sympathetic to its basic shape. Plus, the fastback has great aftermarket support, so the combination of visual and practical appeal drove me towards modifying one myself.

This one came up for sale as an unfinished project. I was still in the UK at the time, where the car was, and the bodykit had been installed. The owner, a bodywork specialist, was asking a reasonable price since, mechanically speaking, it was a complete mess. The wiring was horrid, the interior was mostly MDF from the DIY store, and the mechanics were in poor state.

I got the car ambitiously; thinking it’d be a quick and easy finish, but it took a year and a half to get it sorted,” he admitted.

Over those eighteen months, he took to this car with the same fervor he had with his cafe racers. There was a plan, however — this was no flight of fancy.

Sympathetic Modernizing at a Reasonable Cost

“The whole idea was to learn how the chassis works and modernize it while preserving the original design intent and spending pragmatically on maximizing the driving experience. I thought about engine swapping the L24 with a BMW B58, but in the interest of preserving the soul of the car, I decided to keep the original engine and keep it carbureted, albeit with some modern updates to make it more usable.

It involved a full rebuild of the engine with partnership of Four Ways Engineering. It’s a basic performance setup with triple Weber DCOE40 carburetors, a bigger aluminum radiator, electric fans, a stainless straight-through exhaust, and a stainless intake. I haven’t yet dynoed it, but people with similar setups make around 180-190 to the wheels. I also converted it to electronic ignition and labored over the wiring by introducing common grounds and independent relays to ensure reliability, then I installed a newer and slightly taller diff from a later automatic 240SX to improve cruising manners and replace the tired original unit.”

The powerplant functional, Piers moved onto the chassis and its lengthy list of to-dos. “I wanted to modernize the handling, first by stiffening the body with some bracing, and then by welding BC BR coilovers to the original spindles and rear hubs.

“You buy a standard weld-in coilover that is the right size for the car, then you weld it to the original front spindle. It’s a generic fit,” he added.

Along with the new shocks, he turned to Silver Project, a Polish company specializing in 240Z suspension components builds, for their adjustable control arms and tension rods given the cost of securing US imported parts in the UK.

In keeping with the classic looks, he decided to updated the interior with some modest street buckets and an aluminum center console from Skillard, an Oregon-based aftermarket specialist, as well as a couple new powdercoated items to maintain a vintage period look inspired by aviation panels of the era.

The car has a weak point in its chassis stiffness; there is a lot to be gained by taking some load out of the original thin steel. Piers made up for this by introducing Apex Engineered triangulated strut braces in the front and rear.

Piers made the move across the Atlantic to San Francisco this January and brought his beloved Z with him, though it lagged behind by six months. Once he’d shipped and registered the car stateside, he made the next bolt move — to track the car. Last weekend’s event at Sonoma was a first for both him and the car he’d spent so long restoring.

A Day of Firsts

“While I didn’t build it for the track, I wanted it to be fun and capable. I drive it to work, to social events, and on backroads, too. I wanted versatility, mainly. That said, it was easy to see how testing the car on track could improve the product, ultimately.

The first day, it was flooding the cylinders with fuel at high revs on the main circuit, so I did a carb sync, changed the fuel ratio and jetting, and then went back out for the third session, where the car had much better power delivery and more predictable behavior. However, with the additional speed, I blew out the brake booster. In every other sense, the car performed really well considering its age as well as my experience as a builder.

Getting to run with my friends in modern cars demonstrated how these older cars are so much more analog; needing a thoughtful approach from the driver. I spent most of my time trying to preserve my momentum because there’s not much power, and it’s only available across a narrow powerband. I can’t just floor it; nothing happens. I need to listen to the car and plan ahead to make sure the car is ready for the next segment as it does not respond well to sudden changes in demand.

Now, through driving the car aggressively, I know that there’s an iterative list of improvements to make, particularly in the suspension and braking realm. It’s got too much dive, and it still has OEM brakes. There are cheap OEM disc-brake setups that bolt in fairly easily with some adapters. I might also add a five-speed box from the 240SX, another bolt-in item, then leave this car alone. It would sound good, stop well, and produce a reasonable amount of power. I think I would be very close to hitting my build objective of a stand out resto-mod which delivers a huge smile to the driver and passenger at a reasonable level of expense.

I’ve not yet spent much time on aero. Given the speed of the car, my goals for the build, and the marginal return of aero modifications, I do not think it offers the best bang for buck at this stage, but is undeniably important and something to consider later on.

The car’s sitting on much wider tires than standard: 9.5 in the front and 10.5 in the rear, and those might be slightly too wide for the power and stiffness. There need to be other changes in the package to support a footprint that size. This was a case of form getting in the way of function rather than sticking true to my original goal: for beauty in their harmony.

I can only say that I was really happy with the event. It was my first-ever track event. Having my friends there was great — to drive alongside them and to have their emotional support when I was spending time under the hood wondering why I didn’t just bring something fuel injected!”

This car, as beautiful and as expensive-looking as it is, was built primarily to teach Piers some of the intricacies of the chassis without costing him a fortune. “With this one, the obvious thing to do is to keep spending time on the setup; I made sure everything’s adjustable as there’s a lot to be learned through making the most of the car as it is before endless upgrades. As long as they worked well enough, I picked mid-tier parts to keep costs reasonable, too.

His second Z car, which he’s just started building, will be built to further his understanding of balancing performance, aesthetics, cost, and usability. “The chassis has already been seam welded and acid dipped with full length frame rails to make the thin monocoque frame a little bit stiffer. They’re not safe cars to begin with, and rather than engineer crumple zones, I will install a six-point cage with removable door braces. I believe that installing a cage is also the best way to stiffen the chassis. The next engine is still an original block, and the intention is to keep it naturally aspirated, but bored and stroked to get more modern levels of power.

There’s a company called Apex Engineering that does a very interesting double wishbone setup for the S30 Z cars in the front and rear. This would be an easy way to achieve more predictable suspension dynamics and a stiffer sub-frame style set up.

In the second car the goal is simple: to take a blank shell from first principles and combine it with what I learned in the first and use it to create a beautiful, analog, and enjoyable high performance sports car whilst staying true to the original design intent of the 240Z.

Now when I’m driving the car, I feel more confident given I understand the basics of how it works, and I think the education the car has given me has made me a more sympathetic driver. There remains a very long way to go, but understanding why the car behaves the way it does has really come from putting it together myself.

I spend most of my day behind a desk, so this is a great distraction from my normal day and focus on creating something immediately tangible — it has this incredibly different feeling to the rest of my time that it makes it easy to become hyper-meticulous. I keep lots of notes, so when I go down a rabbit hole on one dimension of the build, I don’t lose that learning when I actually come to implementation later on.

I remember my design teacher in high school giving me advice to sleep with a notebook on my bedside table for those wee-hour solutions — I’m glad I listened. I try to be pragmatic about what I do and don’t do, which is why I picked a readily available, well-developed car, and I try and focus on tackling areas of the build where I can be additive, rather than re-creating a solution just so I can say I did it from scratch. All of this I think maximizes learning rather than just bolting bits together.”

Michael’s 350Z: Take A Chance, Prove a Point

Twelve years with an unloved chassis has given Michael “Stubz” Hillo a unique perspective on taking the underdog route. There are other established, well-paved paths with minimal maintenance and certain outcomes, but they don’t offer a maverick a chance to prove a point.

Stubz took it upon himself to take the unloved 350Z and make it into a NASA ST4 race-winner because, well, he hated the idea of conforming. However, before he started his mission, he was after an affordable way to begin drifting. Nowadays, the 350Z is one of the few Japanese sports coupes that offers the sort of value the budget drifters offered back in drifting’s heyday. Even then, it was pretty cheap.

It was more than just an option for the cost-conscious drifter, as Stubz realized. Beyond low overhead, a torquey motor, and a rear-drive layout, the Z has a lot going for it. It’s reasonably stiff, the aerodynamics aren’t terrible, and the aftermarket is decently sized. It might not be as well supported as the E46 M3, but it offers similar power-to-weight figures and the potential to run respectable lap times at a fraction of the price.

The zeal and the commitment to proving the platform came later — at first, it was cheap fun. Beating up on pricier cars was only part of the pleasure; the steering was full of feel and responsive, the motor responded well to modifications, and the rear end put the power down decently.

Some of that luster began to fade when he tried to turn the Z into something more than a midfield car. The budget modifications no longer seemed to be enough, and so he tried experimenting with the high-end brands which only offered limited support for the Z.

After testing Penske and Godspeed coilovers, he settled on MCS two-ways with 18K springs up front and 9K in the rear. The car still lacks some of the compliance he’d like in slower corners, but it works well enough in the fast sections, thanks in part to Epsilon+ aero, that the compromise is acceptable.

The most irritation has stemmed from the car’s flawed braking system. Persistent knockback issues and lousy OEM ABS pushed Stubz into spending hundreds of hours diagnosing and attempting to find a package that would work.

Plenty of thrown wrenches and a thousand curse words later, he found a set of Stoptech Trophy big brakes that did a reasonable job. Because they moved the brake calipers closer to three o’clock, they mitigated some of the knockback resulting from the steering knuckle flexing. The remaining bugbear was the ABS system, which needed to be retrofitted with the Bosch Mk60 kit from Race Harness Technologies.

Though the braking system works decently these days, Stubz isn’t completely satisfied. Trailbraking has improved, but the outright braking performance hasn’t gotten much better. However, some of that has to do with the weight of the vehicle, which has been hard to lose with conventional stripping methods. “You’ve gotta get pretty creative when it comes to putting the car on a diet. I didn’t want to, but I had to buy carbon. Hatch, hood, front bumper, and headlight blanks from Spinnaker Composites have helped, but the car is still heavy.” he explains.

It’s transformed into a reasonably swift car in recent years, even with the diminishing returns from spending big bucks on primo parts. The 3,200-pound Z has an average of 257 horsepower which is pretty well administered thanks to 275-section Toyo RRs and the aforementioned aero. A broad powerband helps make the car less track-sensitive than some, and, anyways, Stubz no longer agonizes over finding the perfect setup. After several years of head scratching, he sees the Z as a dependable, safe, and sturdy car which is easy to run and satisfying to drive. Going for the gold isn’t his aim any longer — he’s happy with what the 350Z’s speed. Any car that can lap Buttonwillow W13CW in 1:54 is more than just fun — it’s seriously fast.

Striving to perfect the car sapped some of his ambition, but it’s also given him a few notable wins, wisdom, and a pragmatic approach that provides him with peace of mind. His lack of zeal might not motivate newcomers to try and beat the odds, but if they read between the lines, they should realize that there’s nothing with the Z as an entry/mid-level car. It might not carry an ambitious driver to the top of the podium, but its golden era-pricing lowers the barrier to entry. It’ll help them get involved faster — and in Stubz’s view, that’s better than sitting on the sidelines and dreaming of victory.

Walter’s Sentra: Lifetime Obsession

A lifelong Nissan fan and a crew member for an old NASA team running an SE-R, Walter seemed destined to pick up this particular Sentra. His family had brought him up on Zs and Maximas, so when Walter turned 16, he bought his first car, a 1991 Sentra.

That sowed the seed for the next several years. Inspired by Need for Speed, he started tuning his Sentra and soon became a knowledgeable voice in the community as well as an in-demand mechanic. His reputation opened the door to crewing positions for several big teams running in NASA’s SE-R Cup series back in the early 2000s — some of which even ran in the 25 Hours of Thunderhill.

In 2003, Walter stepped away from cars to focus on family. That break lasted for fifteen years. After that long interim, he picked up an E46 M3 and started driving himself. As good as the BMW was on the track, the love for the old Sentra, now mixed with his recent racing experiences, led him to consider building a special Sentra for racing. However, he couldn’t spare the time he once could, and so he hoped something half or wholly-built would pop up in the classifieds.

When an old friend reached out to Walter with news of a special car for sale, he felt like his stars had aligned. Not only was this particular Sentra built by MotoIQ’s Mike Kojima, but it had been the brother of a car Walter was familiar with — one which had been raced in SE-R Cup back in the day.

That particular car from his crewing days was named “Dog I.” This was “Dog II,” the sister car. The two had been given their monikers from their Petco sponsorship; they had pawprints plastered all over them during their racing days. The latter wasn’t used much in Spec SE-R, but it had seen some action in the Pacific Tuner Championship ten years ago. Since then, it’d been stored and taken out for the annual track outing. The price was right, the build quality was obvious, and the decision was easy. Walter drove his truck and trailer down to LA that weekend and began a new relationship that joined his past with his future.

Like its sibling, Dog II is built upon a body-in-white build with all the right parts. The motor, a 2.1-liter SR20VE with 11:1 compression, produces 200 horsepower and 170 lb-ft of torque on a 50-50 blend of 91 and 100 octane fuel. It’s a peaky motor, but with only 2,600 pounds to push along, it makes do.

An oversized Koyo rad is part of the beefy cooling system that helped Kojima run the car comfortably in desert heat.

Handling comes courtesy of a square set of 235/40R17 NT01s wrapping Volk TE37 wheels and an intricate cage connecting all four shock towers. Ground Control coilovers, plenty of front camber, and a bump steer kit help the car follow every minor steering input. The final touch, a little bit of rear axle bending to toe the rears out slightly, contributes to the Sentra’s immediate turn-in — the kind that is vital in a front-drive sedan. “Super oversteery” were the words Walter chose to describe its balance.

The car was just about perfect. Aside from updating the safety equipment, Walter felt it needed nothing. That was until he drove it on track for the first time and struggled with the peakiness of the motor. Despite the SR20VE’s variable valve lift, it isn’t quite as tractable as he wanted. So when picking out a new Nismo LSD, he specified a 4.75 final drive to keep the engine in its sweet spot more of the time. And like that, he was done with modifying it.

The problem with a car like this, even a relatively simple car that’s nearly completed, is that it requires a trained race shop to maintain it. He leaves it to Tarek at All Automotive in Mountain View. “They have the suspension geometry expertise and motorsports experience needed to direct the continuing development of the vehicle as well as continue the maintenance needed after every season,” Walter adds.

Now that the Sentra’s up to date and running reliably, he hopes to put in as many track days as he can. It hardly uses its brakes; the Wilwood four-pistons and 11.75” rotors are understressed. For how fast it is, it’s remarkably easy on consumables. It’s still on the same set of tires the car came with, too.

He played a supporting role for many years, but once the ball was rolling and he was able to sit himself in the seat, things have gotten steadily better. His racing education helped him make the right decision when it came to buying a purpose-built car — one which has given him the opportunity to put in his 10,000 laps without having to regularly wrench on the car. The fact that he’s finally getting to hone his driving skills on track in such relaxed fashion is sweet, but it’s not quite as sweet as being able to simultaneously revisit his tuning heyday and witness his racing future expand.

Ken's 240SX: Twenty Years in the Making

A student of motorcycles, Ken Yu spent his formative years tracking two-wheeled vehicles at Thunderhill, Laguna, and Sonoma. Eventually, he grew tired of taking spills and started looking for a four-wheeled way to get his fix. Specifically, he wanted something easily modified and cost-effective. Back in 2001, 240SXs could be found for nearly nothing — especially ones with blown motors.

A Zilvia.net posting led him to this 1989 hatch, which had been sitting for some time and needed a little love. Well, a lot of love. Aside from the blown motor, there were some serious issues contributing to the low cost of the car. “Someone left a burger in the back. There were maggots everywhere!” Still, $1,500 was a steal.

He started with a basic set of suspension upgrades. Whiteline sway bars, Megan Racing track coilovers, SPL lower arms and tension rods.

Out came the interior and in went the vinegar solutions. Then came a stock SR20, Z32 brakes, Tokico shocks, 5Zigen wheels, and Federal tires for plenty of fun in those halcyon post-college years. And this first round of modifications didn’t break the bank; many youngsters could swing these back then — no pun intended. When a full S13 front clip only cost $2,500, it was not too hard to put a quick 240SX together.

Rather than take the typical drifting route, he decided to make his 240SX corner. At 2,600 pounds with ~200 to the tires, the 240SX could graze 100 at the end of Thunderhill East’s front straight. It was nimble enough to get around many autocross courses, too.

By transplanting the motor without replacing the coolant hoses, Ken blew a pinhole leak in a coolant line at Thunderhill in the middle of July. Three of the ringlands broke, sending shrapnel into the head. He managed to limp the car all the way home to Hayward with regular coolant top-ups, but the SR was toast. He rolled it into the back of his garage with hopes to quickly replace the motor, but he didn’t bet on the next chapter of life taking him down a very different path than he’d pictured.

Ken got married, had two kids, a dog, and bought a house, so the track toy no longer took precedence. However, he kept the dream alive over the next five years by amassing a small stockpile of go-fast parts and tools.

Starting seven years ago, from ten to midnight — after the kids had gone to sleep, Ken would sift through his parts pile and make small steps towards rebuilding the car. Megan Racing coilovers with Swift springs, a pair of Sparco seats, an extensive cooling package, and a bolt-in cage set the tone: it was going to become a full-on track car built on years of forum trawling.

With his new CD009 on the floor, Ken spent a couple nights fitting Jun Flares and GarageMak overfenders.

Lots of research was needed to find out all the desired suspension settings for the 240SX — no darling of the track day community. With relatively scant information available for track-oriented S-chassis, he had to consult some of the video library he’d amassed over the years. “I’ve been watching Video Option since Volume 12.”

As this would be a fat-tired track car with a need to put power down better than what a stock S13 ever could, he had to identify the flaws of the suspension setup.

Up front, he added a set of Geomaster knuckles to lower the roll center for improved camber and toe curves. Along with that, he threw on most of the S13 parts in the SPL catalog, Techno Toy Tuning’s lower front arms, and even an S14 rear subframe for slightly better geometry and a wider track. Thankfully, retrofitting the older car with this S14 part only required a set of conversion bushings.

It would have to stop well, too. There were the two-piston rear Brembos sourced from a 2004 Subaru STI and mated to two-piece Girodisc rotors with Carbotech XP12s. Installing them was a cinch, too — almost a bolt-on affair.

At the front, the Core4 Motorsports Wilwood six-piston with Carbotech XP16s fulfilled the same need for easy modification, while offering far more reassurance than any hodgepodge of other car’s parts. Any track rat loves knowing that the kit on their car has been used by Core4 on their Silvia build for AER endurance races.

“Collecting all those parts was what kept the dream alive.”

When the ball was officially running, he called on two respected old school shops to help him rebuild the one piece he didn’t replace himself. Lonnie Jenson Co increased the SR’s bore to 86.5 mm and assembled the bottom end with Eagle rods and CP pistons. Performance Options rebuilt the head, while Ken added HKS Step 3 camshafts and dual shim rocker guides to keep the head from vibrating itself to bits at higher revs.

With a whole new fuel system and a Link G4X standalone ECU to decide on the right blend, Ken knew that he’d be stretching the stock gearbox to its limit. A Mazworx conversion kit, a CD009, and an ORC twin-clutch disk made up the the beefy new drivetrain — more than strong enough to handle 360 horsepower at 310 lb-ft at 5,500 rpm. That was sent back to an S15 helical differential with a 4.3 final drive. The combination of this gearbox and rear end resulted in explosive acceleration.

Getting tuned at Blacktrax.

After bolting in and tuning the new powertrain, the car would hook when pointed directly ahead, but the lack of compliance over surface variations caused Ken a few spins. At first, Ken struggled to find much grip coming through Turn 3 and 3A at Sonoma. “The inside wheels kept losing contact due to the lack of droop and suspension compliance. The solution was to ensure 30% of the suspension travel was reserved for droop through the helper springs,” Ken noted.

With more toe-in at the rear and a TCS Sportline rear wing, the car’s stability improved at higher speeds and under heavy braking. Being heavier in the front than the rear, it still gets a little light over the crest of Laguna’s Turn 1, but it’s less than vicious. The wingless iteration felt like it might bite his head off.

To expect much more from the projet would be unfair. December 30th was the first time he had this car on track in over a decade. And, wisely, Ken wanted to study the ways to get a dependable car out on track first.

Clearly, Ken’s done his homework. The engine manages temperatures well for a turbo car — admittedly, only cold-weather testing has been done so far, but it’s likely cooling won’t be a problem except perhaps on the warmest days.

The geometry is improved, the drivetrain handles the horsepower well, and the maintenance it requires is relatively low for an old Nissan. There’s also little tweaks that show an attention to detail and an emphasis on presentation, like how the ISR exhaust extends far enough to avoid blackening the bumper. It’s pretty — and that’s not always a great descriptor for a 240SX with bolt-on over fenders.

The attention to detail and insistence on putting reliability first will make the car’s issues easier to diagnose. However, half the car’s ancillaries are OEM SR20, so time will tell how well they’ve weathered the elements.

It’s clear Ken’s laid the right sort of foundation. Coilover testing, adding a front splitter, and increasing body rigidity are the main items on the agenda. Seam welding around the hatch and the doors — two massive apertures for such a small body — should make another massive step forward in making this middleweight handle well. Buttoning it up will take time, but Ken’s already sunk two decades into this car and his enthusiasm for tuning the 240SX hasn’t diminished one iota since the start. In the grand scheme of things, what’s another year?

Lief Storer's GT-R: Big Dreams, Bigger Numbers

Lief’s love for casual canyon carving, like so many track rats, set the stage for a serious foray into track days. Running the sinuous mountain roads near Oakland and sliding Tahoe powder in his 2009 WRX was enough to whet his whistle for a few years, but when the prices on his dream car entered the realm of attainability, he decided to take the leap and turn his cost-effective pastime into a full-time hobby. An Adobe-sponsored corporate track day at Sonoma made Lief absolutely certain he wanted to push a more powerful car in an environment where he could safely push the car’s limits.

His dream car was not a hardcore thoroughbred, nor was it super light, but Lief was convinced it was the ideal platform for an aspirational build. His 2009 GT-R had all the potential for quad-digit horsepower and a place at the top of any timesheet. He had grand dreams about turning this tech-heavy heavyweight into a standout.

Plus, much to Lief’s liking, the car was practical. “I could throw a set of race slicks in the back, drive it to the track, swap ‘em out, and then when I was done, drive home. It wasn’t just about the power or the grip—it was an everyday supercar I could live with.”

His aim of regularly competing in Speed SF Challenge and other time trials encouraged him to find that elusive happy medium: sharpening it while still retaining some streetability. For some time, Lief drove the car to and from the track without any problems other than a frightening tire bill. However, as the car kept getting faster, Lief eventually turned a corner and decided to change the car’s designation permanently.

Out of the box, the wet weight of the GT-R is over 3,900 pounds, so serious stripping was in order.

About three years into regularly tracking the car, he called on Tony Colicchio at TC Designs to weld in a full cage. “The night before sending it to TC, I got a little carried away. I stripped everything out of the car I could, and before I dropped it off the next morning, I realized that I was going to build this car solely for time attack.”

After a few more weight savers like polycarbonate windows and a titanium exhaust, he moved onto the fixes that a heavy, complicated sports car needs if it’s going to last longer runs. A Litchfield transmission cooler, a CSF radiator, and all the Trackspec venting to keep the VR38 and the braking system reasonably cool.

The next order of business was bringing the Nissan’s nose in-line. “Understeer out of the box is awful…it’s akin to a bulldozer plowing than a precision race vehicle,” Lief admits. “I wanted the car to follow my steering inputs, and so we went to town on the front end. Now, there’s a Nismo LSD up front, a set of widebody fenders, and custom Brypar knuckles that allow me to run a set of Advan GT 18x12” wheels and Yokohama A005 slicks set into perfect alignment with SPL arms. Paired with a large front splitter fabricated by Trackspec, the car can rotate in slow corners and still tuck the nose in for fast corners, too.

An Overtake rear LSD was added to reduce drivetrain temperatures, and it also improves rotation. Even after considerable weight savings measures, the heavy GT-R stopping distances aren’t the shortest, so Lief fitted 4-piston Brembo race calipers with endurance pads. The difference in pedal feel from the OEM Brembo 6-piston to the race-oriented 4-pistons is night and day. They also offer a much lower profile for improved cooling, and the 32mm pads that will run five track days without any noticeable fade

The car was pointy and precise, but the bump in front grip came at a cost. “I got a little carried away at Laguna one day and spun it through Turn 6 at about 90 miles an hour. The wall was about five feet away when I came to a stop.”

The need for a complementary rear end pushed Lief to buy the biggest chassis-mounted wing he could fit: a 78” APR GT-1000. The resulting balance put the car into a new performance window that helped him set a few of his best times. He’d found a consistent, capable car that wouldn’t bite his head off if he made a mistake. Even better: the motor wouldn’t overheat in the course of a fifteen-minute session. Its oil circulation was not as strong, however.

“In my opinion, Speed SF Challenge offers enthusiasts a unique balance of risk and fun, while ensuring competition among a range of participants of varying budgets. The feeling of the grid is racey and competitive, but you’re not overly concerned with swapping paint.”

After an auspicious Sonoma session in which Lief set a 1:42.4, the motor let go. “I hadn’t been checking the oil frequently enough, and I believe I starved it in Turn 11 and threw a rod. The motor had seen around 30,000 miles, 20,000 of which were track miles. Every dog has its day.”

The cost of consumables with this heavyweight had been hard enough to swallow, but an engine rebuild gave him a reason to panic. With the price of a VR38 long block pushing $25,000, he had to get creative with his financing and find a shop that could pencil him in without emptying his bank account.

The cost was so extravagant that cross-country shipping the entire car was a worthwhile endeavor. Check6ix offered him the most appealing deal of the notable GT-R shops he’d contacted, and that meant sticking it on a hauler en route to Georgia.

Eighteen months later, he flew out to Atlanta to pick up his rebuilt baby. Cicio Performance had fitted the head with upgraded valve springs and cams, then filled the block with forged Manley rods and pistons. The cam change had bumped torque to a respectable 630 lb-ft, and that’s with the factory turbochargers still in place. Retaining the stock snails is not something that someone who’s just fitted a MoTec C127 ECU to their motor usually does, but Lief felt they’d do the trick. “I just wanted it to run reliably and respond to my footwork. I also wanted to keep the car right at the limit for running in NASA’s TT1 class.”

Coincidentally, the completion of his new motor lined up with Global Time Attack at Road Atlanta, so he flew out East with his helmet and suit packed, and met with the Check6ix team in the pits.

The car, sitting on a set of old Yokohama A005s, was frighteningly fast out of the box. Lief clicked off a 1:29 in practice, and after a few setup changes and some familiarization with the course, he managed a 1:26.6. This was good enough for a 4th place in the Unlimited class, which was filled with builds boasting another 300 horsepower. Though he was outgunned from the get-go, Lief was forced to compete in Unlimited as the rules for the lesser classes require a dashboard of some sort, which was absent in this car.

Back on the West Coast, Lief’s been racking up the sort of lap times that make everyone purse their lips and nod. Best of all, he’s been doing it without chasing quad-digit power. Currently, with just 600 horsepower and a wet weight of 3,400 pounds, he’s been able to put a 1:27.8 in at Laguna Seca. He’s spent a pretty penny to get this far, and he’s debating whether it’s worthwhile spending more.

“I’m at a fork in the road where all I see are diminishing returns, and at some point I want to start another project. I keep saying that it’s done, but part of me thinks I’ll need to work a little harder to perfect it,” he says. “I still want to get some weight out of the car—I can try tubed subframes and some more carbon panels; weight reduction has made the car so lively. It’s been an amazing journey—both building the car and investing countless hours on the simulator. We’ve both come a long way.”

After going sub-30 at Laguna, Lief has his crosshairs on getting under the 1:40 mark at Sonoma and under 1:50 at Thunderhill East, “There’s something about those ten-second incremental milestones that makes every one of us track junkies completely elated. I hope there’ll be a few more on the horizon.”

He might not’ve gone for bigger turbos, but it’s clear Lief is a guy who likes big numbers—and he went about getting them in the smartest way possible.

Adam's S13 Coupe: Silvias Do More Than Slide

Some might think that S13 coupes aren’t really suited to turning quick laps, but some know better. Adam Swan’s owned thirty-five different S-chassis cars, so he knows better than most. This particular car, bought before some of the JDM favorites were considered investments, only set him back a few grand. That would be a steal for a stock car nowadays, but this one had the running gear from an S15 Spec R.

That means an SR20DET, a six-speed transmission, and the viscous limited-slip differential in a body weighing around 2,750 pounds. It was immediately at home on canyon roads and shorter drift tracks, where Adam beat it mercilessly for the his first few years of ownership.

It even got the S15’s gauge cluster.

At the time, he was crewing for Valkryie Autosport/GOTO Racing, then running a Nissan R35 GT-R in various time attack series. Inspired by the challenge he was partaking in, he decided to take his recently acquired S13 and try the road course for himself.

Being light, moderately powerful, and rear wheel-drive, the S13 had the bones to become a track car. He called upon his experience and added some budget basics to free up a few horsepower and find some support.

For the power adders, he grabbed a trio of no-name budget bits: a 4” turboback, a front-mount intercooler, and a manual boost controller. Good enough for a healthy 220 horsepower at the driven wheels, which, after stripping the interior and stuffing a Joshua Sher half-cage in there, made for a pretty punchy machine. Great torque and a much wider powerband—one perk of the S15’s variant of the engine—propel this 2,600-pound car at a surprising rate. It’s not just about peak power, but mass, gear ratios, and available traction.

Forget Fancy Stuff

That last trait benefited from the first major handling improvement: 5Zigen FN01RC wheels wrapped in a staggered set of Toyo R888Rs—235s up front and 255 in the rear. To make the most of the wider footprint and improve support, he added Fortune Auto 500 coilovers, SPL tie rods, and a no-name front swaybar bought off eBay. Remember when an S13 was a budget sports car?

Even without primo parts, the package was enough for fast laps without any drama. However, it was nearly stock in other areas, and that became a problem when the factory S14 one-piston brakes would vary wildly from corner to corner, even with upgraded pads. Additionally, the VLSD’s tendency to peg-leg limited a lot of his corner-exit potential. Not perfect, but not too bad for what was essentially a stock car.

Life was stress-free a long time; going to track days without breaking the bank, running full laps without worrying, and putting in respectable times. As his confidence grew, Adam started to wonder if a few aero pieces might not make a massive difference. Adding an Alumalite splitter and an NRG rear wing spruced up the basic shape of the Silvia, but the aero change worsened his confidence.

Some inspection from the sidelines showed that the trunk was flexing under the pressure of the wing. This was due to a lack of trunk reinforcements, which, when added, made a huge difference. The balance went from being skittish at higher speeds to neutral with a hint of understeer in the fast stuff; something easier to lean on when learning the basics. It also helped cut about five seconds off his previous bests.

Adam recognized that what the car required was a little fine-tuning at this stage. Switching from Toyos to a set of Advan A052s proved to not only give him longer stints before the tires’ performance would dwindle, but after playing with pressures for a few lapping days, he found that he was getting much closer to that reassuring sort of balance he’d been after for some time.

By getting the preloads, ride height, and cambers correct, he was able to feel at ease while pushing. When the rear stepped out, his drifting experience came in handy. Even though the of the suspension wasn’t widely adjustable, he could get it to do what he wanted it to.

He took it to Global Time Attack twice, both times competing in the Limited Class—a best of 11th in 2020.

Resurrecting the Silvia

His business SwanSpeed has picked up in the last couple years, so the trusty Silvia has taken a spot in the back of his garage. Though the engine’s been plucked from the bay, it’s not a cause for dismay. The reason it’s gone is because he’s finally found the sponsorship needed to make the car a front-runner in Limited.

The body’s been widened with Origin overfenders to run wider tires; 275s at the rear—hopefully enough to harness the power the new motor will make. The heart of the new build, currently in progress, is a TEM Machine IndustriesM-built SR20 with forged internals, a quick-spooling turbo, E85 capability, and with any luck, a little over 500 horsepower.

The Silvia might not have the traction of some of its rivals, but it’s an underrated chassis in a grip setting. It doesn’t have much mass to push around, nor does it have many vices. Provided the brakes and differential are replaced for something a little stronger, Adam might be able to give his inconspicuous Silvia a fighting chance against the S2000s and GT-Rs. Not terrible for a car with less than ten grand invested.

A big thanks to Horsepower Industries for their endless support.