to improve your current hx power band, you might look in to if your exaust header is helping, or hurting your low end power, often they over size headers for more high end power, totaly killing low end power, yes, the 4-2-1 helps, but not as much as the proper size, smaller tubing can help keep those exaust gasses moving fast.
Yeah, I know headers are typically made for high end power. For that reason I got the tork-step header that has the smallest primaries I could find when it exits the head. It did help low end power but I only felt a big difference at about 3000rpm and above. (Note: I only drive with rpms between idle and 2500rpm).
I want to put a vx intake on my hx to increase my low rpm power...It is all I really care about and if the sensor ports work right I know I can port the throttle body area out and make it work....
I wish I had a d16 throttle body gasket and a d15 intake to compare the iacv sensor ports...... can anybody check this out for me?
I read that d13s came in like 2000 honda Logos that were sold in japan and Europe. I think these had MPFI so that would help with a swap....That is pretty sweet that they are 4 valves per cylinder...I wonder if they ever had Vtec-e.
vx injectors are 240ccc
the 96-00 cx (d16y7) had the 190cc...
the japan civic EL had the d13b (97+ for sure, probably 95+)
dont know about europe
and the fit/jazz came with a 1.3 L-series motor
there was also a rare 1.2L L-series
the 1.4L L-series was just a label difference of the 1.3L
all of the i-DSI (dual spark ignition) L-series motors (including the 1.5L) achieved greater than 50mpg
thank you US Government for not allowing the i-DSI into our country (insert sarcasm here)
the honda jazz/fit was the first car to outsell the toyota corolla in japan since its inception in 1967
american piles would have stood no chance against that kind of selling power
the current american fit implements the 1.5L & 1.5L vtec motors
these are not i-DSI motors...and get 30-35mpg
however i dont see why an imported motor swap couldn't happen
PDM (phillipines) and germany both have Left Hand Drive vehicles with the i-DSI motors
Actually, VX injectors are 190cc just like CX injectors.
As for running a D13 with a VTEC-e head, the problem here is getting a proper tune on the P07 ECU. From what I have seen, he P07 DOES have a space for a chip. But it is my understanding that it is a MUCH different ECU than other Honda ECUs (like the P28, for instance). And reprogramming it is hardly something wel-established. You COULD, of course, reprogram a P28. But you would lose the precise fuel control of the wideband sensor AND the lean burn. The result would likely be an engine that is no better as far as FE than the D15Z1 (if it is even as good).