Inside Look at the Detailed Tuning Process of a Boosted S2000
Repeated dyno runs with fine tuning in between allow this S2000 to make 556 rear-wheel horsepower.
The video above comes to us from the PFI Speed YouTube channel and it features the gradual process of squeezing more power out of a turbocharged Honda S2000. Over the course of the 21-minute video, tuning expert Brent Leivestad makes a half-dozen blasts on the dynamometer, with tuning adjustments and a minor mechanical fix along the way displayed on the large screen alongside the car.
Thanks to this big screen, we can watch Leivestad improve the output of this S2000 from 112 to 556 rear-wheel horsepower, with fine tuning on the later runs pulling about 50 extra horsepower out of the boosted Honda engine.
The first run in this video is a gentle one, coming after Leivestad explaining how he brings the engine up to speed before really cranking into the throttle. The majority of the discussions are hard to hear due to the background noise in the shop, but if you really turn your speakers up, you can hear what the tuner has to say during the process.
On the first run, Leivestad is just getting a look at the basic figures of this boosted S2000, laying down a meager 112 horsepower at the rear wheels in a run that clearly doesn’t showcase the potential of this Japanese roadster.
After this first run, we get a look at the big screen next to the car, showing us exactly what Leivestad is seeing on the laptop that he is using to make tuning adjustments. Making adjustments to timing, fuel flow and other engine parameters allow the tuner to optimize the output after that initial soft pull and on the second run, this S2000 makes 299 rear-wheel horsepower with the boost cutting at 12 pounds.
At that point, the crew removed the manual boost controller and cleaned it out well with the hopes of getting more boost pressure, at which point the video really gets good.
Big Power Pulls
After cleaning out the manual boost controller, Leivestad makes the first good run of the video, making 499.11 horsepower at the rear wheels and on the next run, power climbs to 537 horsepower. That number was reached with 12.5 pounds of boost and with the injectors working at 101% of their duty cycle.
At that point, everyone in the shop places a dollar bet as to the output on the next run with the boost turned up a little more. Guesses range from 545 to 562, but the engine is too hot and it “only” makes 527. However, after the engine was allowed proper time too cool down, some final tuning adjustments were made, the bets were tallied and the final run of the video was made.
On this final run, the PFI Speed-tuned Honda S2000 laid down 556.04 horsepower at the rear wheels and the video ends with a look at a short two-step fireworks show.
Crank up your speakers and enjoy!