Joe pow

I now know i cannot just vent the IACV to the atmosphere.

i guess another way of asking it is - does the diameter of the rotor used by the r33 decided by where the holes are on the knuckle making the caliper sit out further or does the diameter of the rotor used by the r33 decided by how long the calipers bolt hole supports are hopefully that makes sense. in another words, are the r32 gtst and R33 ECR33 calipers basically the same?

Brake size R33 ECR33 I'm looking at buying some new calipers and wondered if the calipers off a R33 ECR33 that match a 296x30mm rotor were matching 296mm rotors because of the caliper mounting holes or the knuckles holes?

got some other things I would like to know. what is this vacuum fitting for? if i remember right it was connected to the actuator looking thing on the intake "tunnel" in the 2nd photo. what is this and what purpose does it serve? (the actuator looking thing) was connected to the intake pipe going into the turbo if i remember right. Also if i just put a mini air filter onto the IAC valve will it work like normal or does it need to be connected to the intake piping? (don't see why the air filter idea wouldn't work fine)

Need Info on 180sx/rb25det so i have a few questions regarding parts in my engine bay as well as a question about a vacuum hose. a bit of info - haven't really worked on this project for 2 years, basically dropped the engine in and couldn't do much else due to money issues so I'm hazy on some things that might be simple. what is this? was located next to & connected to what i think is the "vacuum regulator" in the corner of the engine bay near the brake booster. is this the "vacuum regulator", what purpose does it serve and do i need it in my 180sx rb25det conversion? does this pipe which reads "air intake turbo mani" just go into the intake manifold? which one of these would i attach to the other or what not to turn off abs error on the dash (I assume its the abs making the ( ! ) come on since everything else was plugged up when running the ignition.) . any help is greatly appreciated.