Alright, in my S14 (I know its not a z, but figured this might be of use to someone with one) I have a large FMIC that covers the entire opening in my bumper.
I have a radiator that is mounted in the factory location with pusher fans (no room for pullers). I am going to make a shroud to cover the front of the radiator leaving two 12" holes for the fans to increase the effectiveness and not have them mounted flat to the radiator. Is this going to hurt highway cooling? Reading the ducting articles on here, and the ducting info in Maximum Boost I think it will be fine. I do have the radiator totally sealed to the core support.
Next question, there is about 5" between my radiator front and intercooler. Should I build ducting to go between the intercooler and the radiator? My concern is that it may actually restrict air movement too much. the intercooler is 3" thick chinese core with a fairly open fin design.
I had envisioned this;
Intercooler sealed to opening in front bumper. I/C sits about 3" back, so I can block off the edges and make it fit tight so the air will either bounce off or be forced through.
Shroud from rear of intercooler to the front of the radiator.
Thoughts? I have read the aerodynamic threads etc.. and will likely do a splitter/belly pan on the very front edge between the core support and the front lip as well.
Thanks - Evan