This has been out for awhile but with 3 rather simple mods, an increase of upto 27 percent can be made on the already powerful little 2L.


Mod 1
Replace the existing mufflers with "Two 2˝-inch Magnaflow mufflers" and a cat back replacement between the mufflers and the cat. This allowed an increase of 14 percent. Its where most S2000 owners start modding because of the easy gains.

Mod 2
Hook up a MoTeC M4 programmable ECU to work in unison with the Honda ECU. They found the Honda running quite rich at high RPM so by leaning it out, playing with the timing and changing the VTEC changeover (slightly) gave another 8 percent.

Mod 3
Keep the factory airbox/filter and have a cold air duct guiding in fresh air to the bottom of the box.

Overall there was a gain of around 27 percent. Just changing the mufflers themselves give incredible gains!
Honda would have deliberately chosen to run rich at high RPMs to make sure the car gets through the warranty period. I wouldn't be surprised if they improve on the mufflers for the S2200.


(Article sourced from Autospeed)