I could see gains of 23.5 hp @ 8800 RPM. Probably not on a stock engine, but on one with I/H/E/cams. When I added a VAFC & intake to my cams setup, I gained about 20hp at 8800 RPM. The VAFC was responsible for 12-15 of those horsies.

The stock ECU runs really rich above 8300 RPM which causes a huge power loss. By leaning the mixture out, there is a lot of power to be gained. I'm sure that you can even get a little more power by tweaking the timing.

 

The way I understand the Ebay ad, this AEM EMS has already been dyno tuned on an S 2000 with just an intake. So, you are not only buying a stand alone tunable ecu, you are buying one that someone has already gone to the trouble of programming. I'm sure leaning out the feul mixture up top will yield pretty significant gains. 23 hp is certainly not out of the question.

 

Oh yeah, I'm gonna try to snatch this up at the last minute for cheap. Retail on thes is over a grand plus dyno time. I've been watching it for a couple of days.

 

The "plus dyno time" is what you have to watch out for. Just because someone has dyno tuned it on their own car doesn't mean that you can just drop it into your car and run with it. Each car is a little bit different (whether it be due to mods, or just manufacturing differences). I'd recommend that you still invest in some dyno time before you try running that ECU.

 

www.p1auto.com is right down the street and jack is a genious. They have a mustang dyno. Of course I wouldn't take an unknown ecu and plug it in and wait for stuff to come through the hood. Thanks though.