i've been considering an s2000, and the more i read up on it, the more i'm convinced that the k20 is superior to the f20c. i mean, the f20 is a great motor, makes 120 hp per liter, and has a 9k redline....but there's one fault to it i think: its running on its peak and there's really not too much you can do to it w/out running into ITBs (NA, but quite expensive) FI or running on the nitrous oxide. When compared to the k20 motor, the k20 is a hell of a lot more responsive to mods...and i've seen many make 240 to the wheels w/ just bolt ons.

Here's the main point of my post...they're both two liter motors, both 4 cylinders, and were designed within years of each other. but what in the design of the two motors makes the k20 so much more receptive. i know the k20 has the VTC (iVTEC), but really...that shouldn't make that much of a difference. anyone got any input?

 

f20 is actually just a hybrid of the engine prelude's have. so it isn't technically that "new."

Whereas the k-series engines were designed from scratch by the engineers at honda after they discovered their mistakes with previous engines. Not to mention the k-series engines are downtuned so much to fit emissions, that's why they respond to breather mods so well. not to mention the different style of ECUs... k-series have programmable kind whereas the s2000 does not.

 

the point you made about the tuned h22...that may be right on.

but the point abotu the ecu, i want to bring something up here. s2000 ecus are pretty much...as good as they're gonna get. no chipping worthwhile here. the only thing that the f20 will really benefit from is a full standalone like the motec or aem ems.. with an emd and intake, i've seen some s2ks pull 20 whp. similar to the hondata flash and cold air results that rsx s's get.

 

ah i see, i never seen a graph of the a/f for a stock s2k motor/stock ecu. but yeah, the s2000 is not new technology.
i-vtec in the k's is. This is an interesting question, hope more people get involved with it.