"You can't just build a car and expect it to be fast. It takes work. You have to practice, practice, practice, take data and more practice. Only then will you, maybe, make a fast car. You can't just build a fast car by adding parts." - Michael Chang, Owner of Evasive Motorsports.
When it comes to car setup there are a number of things to consider. Based on their extensive track time and excellent results we knew the experts from Evasive Motorsports in La Puente, CA would be more than qualified to break down a good time attack setup. If you want to setup your car to attack the clock, get ready to take some notes. Let's take a closer look at Evasive's revised street class S2000 to see what makes this record breaker tick.
Last but certainly not least, brakes contribute a lot to fast lap times. In time attack it's not just how quickly you can accelerate that counts but also how quickly you can stop, and for how long. Brake fade is a driver's worst nightmare and making sure you have the right fluid and correct rotor size for the job is paramount. Brake pad compound is another area that takes a lot of thought and should be matched to the tire compound for optimal performance.
"We upgraded the brakes to an AP Racing brake system. It takes heat a lot better than an OEM sized rotor. We also switched to Project Mu 999 pads all around." - MC
At first glance the Voltex kit on this AP2 (the first and only one anywhere in the world at the time of writing) makes the car look like something you'd see in the unlimited class. Looks can be deceiving as this is actually a street class car, but despite the lower speeds seen by the car the aero kit still plays a huge role in the car's overall performance. Why? A good aero kit does a number of things for a car. Aero can increase downforce allowing faster cornering speeds while reducing drag for better acceleration. Added stability and cooling capabilities are other benefits. With the use of this kit, Evasive recorded an average increase of 6mph in turns, enough to shave 2 seconds off the previous configuration's lap time!
"We worked directly with Voltex to develop a kit for the S2000 since we felt it was something needed in the US. For a car that's so underpowered aerodynamics are often overlooked. Our results this week demonstrated that a well-balanced car can be as fast as a 500hp Evo" - MC
Wheels And Tires
Tires are the only portions of the car in direct contact with the road surface, so saying they are important is an understatement. You need to match your compound to your suspension or else your results will be less than pleasant. Tire sizing is also crucial, as you want to optimize your contact patch. The wheels that the tires are mounted on are also very important. The lighter and stiffer the wheel the better response the driver will feel. Sizing and offset are key, although a super low offset might look nice it's not always the smartest choice.
" We hooked up with Yokohama to run their Neova tire, which is awesome to run these kinds of events. The tire handles heat very well. Every time we go out we always have to take tire temperatures and pressures." - KC
Inside the engine compartment we see internal work done on the engine, just some essential bolt-ons like an intake and header upgrade as well as some additional cooling. A key ingredient to having fun at the track is ensuring the car sees minimal downtime. If you're on a budget it's a better idea to build the engine for longevity rather than overall performance.
"It's a stock motor with a J's Racing intake, Toda header and custom straight-through exhaust. We covered the intake in thermal tape to cut down intake temperature and added a duct through the headlight to cool the intake manifold. We've never had any problems with the engine at all. Most of the time this car is a daily driver; it's a very reliable engine and car." - Ken Chitwood (car owner), Evasive Motorsports
Suspension is arguably the most important aspect of a track car. No matter how much power you have if the car won't turn efficiently you're going to have slow lap times. Proper spring rates and valving is crucial and settings will vary depending on what type of tires you plan on running. Proper alignment, suspension corner balancing and fine-tuning at the track also go a long way in helping to create a fast and solid handling car.
"The Evasive Motorsports Spec TEIN Super Racing Dampers are another item where we teamed up with the manufacturer. It's the valving that worked very well for us so TEIN produced ten sets for us." - MC
"We went with a much stiffer polyurethane bushing because we were getting a lot of deflections with the suspension in certain areas of the track. We saw a huge improvement with the Evasive SRC shocks but it magnified the deflection problem so we also decided to change out the bushings. We really worked a long time to try and perfectly dial in the alignment on the car based on information we were recording from tire data." - KC