Hmm. I guess it makes sense that the sedan is more aerodynamic than the hatch- it has a tail to help break the wake a little bit. I'm thinking that taking 10-11 inches out of the overall height of the car will help too.
I'd like to go with the D15Z1, but I already have a SOHC ZC. If I could get 50mpg with just taller gearing an an optimized tune on the ZC, I'd like to just do that since it saves me the trouble of wiring in VTEC and the 5 wire O2 sensor. I can turbocharge the SOHC ZC almost without spending any cash with a small snail that would spool almost off idle and be perfect for a bit of vacuum reduction starting at 1500rpm- installing the Z1 and then doing that would be a bit harder. The wideband VX ECUs are a little more difficult to hack, so tuning a turbo properly on one would be a bit more difficult.
OK, I'm rambling. Sorry. More feedback from the Honda junkies please?
