[turbothrush]

Originally Posted by 2000neon

I am wondering what the fuel economy difference is between the taller 5th gear VX transmission compared to the 5 speed from a DX? I found a Civic with a D15z1 in it, but I'm pretty sure it is still the DX transmission, and wondering how much it is leaving on the table, fuel economy wise.

Is there anything else to consider about a swapped Z1, I'm guessing the ecu has to be from the z1, anything else?

Thanks in advance.

I would say your going to loose 4 to 5 mpg in 5th gear at 55mph.
Also the D15z1 had egr with a control box but I would not bother with it unless you need it for emissions.