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C-WEST/BC/Hankook S2000 - Tech

Super Lap Battle Championship Contender?

Scott Tsuneishi
Jan 31, 2009
Photographer: Gary Castillo
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The C-West S2000 first gained noto- riety in November 2005 when the dry- carbon Honda was freshly shipped in a container from Japan just a few days before its U.S. race debut. With minimal changes performed on the vehicle's suspension, the car was quickly whisked off to Buttonwillow Speedway as it prepared to wage war in the Super Street and eurotuner Time Attack (Super Lap Battle). The S2000 competed in the Unlimited FR Class and was driven by Eiji "Tarzan" Yamada, using of all things a stock JDM 2.0L motor. The naturally aspirated S2000 ran an amazing 1:53.147 time and was named the Unlimited FR Champion that year. The win was a bittersweet victory for C-West and its S2000 because the car was immediately taken back to the U.S. facility, never to be seen again, sitting in storage for the next two and a half years.

When the '05 champ seemed to have been forgotten, the car was surprisingly resurrected, with the help of Gary Castillo, owner of Design Craft Fabrication, in early 2008. Castillo just so happened to work in a shop adjacent to C-West, walking past the S2000 on a daily basis while the car sat around catching dust. Sympathetic of the car's status, he knew something had to be done. With a '08 season proposal to run the S2000, with C-West Japan's approval, the car was given a basic tune-up before it was officially un-retired and trailed back out onto the tracks. Using an over-the-counter GReddy turbo kit on the factory engine, the car was taken to a local track event where the now-turbocharged powerplant and lightweight chassis seemed to work well for both driver Tyler Mcquarrie and the C-West S2000.

As time progressed, the S2000 went through numerous changes and picked up sponsors like BC (Brian Crower) and Hankook tires-lending a helping hand to improve its record-setting times at numerous tracks events. Follow along as Turbo magazine and Design Craft Fabrication prepares to swap out the tired 2.0L mill with a custom 2.4L powerplant. You can bet this team, with its new engine displacement and numerous upgrades, is eyeing the coveted track record of 1:43.523 that was set by HKS and its CT230R at Buttonwillow in 2007. Only time will tell before this carbon machine has what it takes to be crowned this year's Super Lap Battle champion.

Editor's Note: This article was written by Gary Castillo three days after the new engine was installed and the shakedown at Willow Springs Raceway during a Super Lap Battle qualifying event.

C-West/BC/Hankook S2000 Shatters Records Again On July 12, 2008The Super Lap Battle was another good shakedown session for the C-West/BC/Hankook S2000. After our win in Utah we were intent on getting even more power out of the car. The new BC 2.4L stroker engine and GReddy T618Z turbo should be able to handle horsepower levels in the 600-zone, but we are only at half that power. As happy as we were about finally finding the problem that led to a loss in power, it was the challenge of solving the issue that was killing us. We were able to get the power up but we had to rely on deactivating Honda's VTEC control. This was a temporary fix because the car should jump up in power once the issue is resolved. We're looking to make over 100-plus more horsepower out of the engine once we can solve the VTEC issues. Nevertheless, the boost was not falling off like it did in Utah, and power was pulling throughout the powerband so we were forced to run the car as is. Upon our first run session we decided to run the boost controller on low and also run the C91 Hankook tires at a moderate pressure. After our first three passes, race driver Tyler Mcquarrie explained that he had to battle a slight understeer issue at the high-speed turns as well as an aerodynamic drag issue in straight-line, high-speed performance. When the timing sheet was posted, it revealed that we broke last year's track record time of 1:28.10 posted by HG Motorsports. On the S2000's first run session it blasted a time of 1:25.05, shattering the record by over three seconds. For the next pass the decision was made to lower the wing by 10 degrees and reset the tires to a much lower pressure and change the rear shock adjustments. On the Honda's second pass it was obvious the changes worked when a 1:23.50 time was announced. The next closest competitor was Tanner Foust in the Crawford Subaru with a 1:37.20. With two more runs left in the day, we were left with the one of two decisions: unload even more power in case one of the competing teams was holding back or play it safe or leave the car as is. The decision was made to try and get more power using a set of BC prototype cams for our third run. During the run it was obvious that we didn't have the proper fueling and timing, so Mcquarrie decided to scratch session three. The original BC cams were reinstalled and boost was turned up 4-more psi for the fourth and final run session. With track temperatures cooled off, the S2000 stopped the clocks at a record 1:23.14. Due to traffic, the car was not able to get a clean third pass, and results have always shown us that with the Hankook tires the third pass always runs the fastest with the rubber up to temperature. While we did ended up winning the event with a record time for the Super Lap Battle, an interesting note about the time was that it is the only production car to run that fast at Willow Springs, compared to full-tube chassis cars and open-wheel cars. The time falls in Willow Springs record list at number 26 in the Top 65 cars fastest to run at the track. Keep in mind that this weekend's win is all testing for the big race coming this weekend at California Speedway. Be sure to look out for upcoming magazine coverage in Super Street, Modified, Turbo, Import Tuner, and Sport Compact Car. Hope to see you all at Auto Club Speedway, formally known as California Speedway.Gary Castillo, Team Design Craft

Redline Time Attack, Buttonwillow, Mar. 22-23First Place Unlimited RWDFirst Place Unlimited ClassFirst Place OverallOne of five cars to run in the 1:48 timezone

Super Lap Battle, Long Beach Grand Prix, Apr. 19-20Second Place Unlimited RWD

Redline Time Attack, Utah, June 28-29First Place Unlimited RWDFirst Place Unlimited classFirst Place OverallFirst Place Super Session BattleTrack record

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By Scott Tsuneishi
247 Articles

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