To allow the intake filter / piping to fit down by the front right air duct, what other stuff do you have to move around?

In my car, a touring model 93 RX7 I have a few things that block me from putting an intake down by the corner of the duct.

there is a Coolant overflow tank in the way and also a relay of some sort and some wires etc...

Are these relays just extra emmisions junk or do they server a purpose of keeping the car running ? =)

Basically in short,
just want to know what the parts are that are blocking me from doing this ...

 

there's no need for cold air intake to be in your bumper and its pretty impossible to do so. That duct is for 2ndary Oil cooler. the efficiency of your intercooler is what define the intake air temp. all air from turbo is hot anyways before entering the IC. better to make nice duct for IC well directed for fresh air w/out leaks.

those relays control your fans. so.... you NEED them to keep your car running or else u overheat and ruins ur engine

 

I would have to agree that a better IC will give you a lower intake temp than CAI.

Even if you had colder air, by the time it gets to the turbos....which are bloody hot already...I doubt it will a huge difference.

Having said that I do agree that on a cold night, the response of the car is alot better than on a very hot day. Thats courtesy of the colder air in the intake or the IC?

 

If you look, he relocated and changed his coolant overflow tank. You have to relocate that to make it work. IMO, a lot of work for not much benefit.

 

Time would be better served relocating the battery and putting in a bigger/better IC with nice ducting.

 

You'd be better off with a 2nd oil cooler, and a v-mount IC/intake. The way a v-mount works, you'll get just as much cool air to the intake with it.

 

I'm still learning what everything is under the hood myself. Even so, I'm really surprised that you don't yet know what the function of those fan relays are. You can download the Factory Service Manual (FSM) as well as the Body/Electric Manual in .pdf format. Download those and study them and you will be able to start identifying the various components in the engine bay and what their function is. If you are like me, there will still be things you don't understand and then go ahead and ask.

It just seems prudent to first figure out what you have before you start to plan what you would like to modify. FWIW, I'm starting to think that an upgraded standard mount intercooler may be a nice upgrade for me down the road, but I still have too much to learn about my current setup and how everything interrelates before I do it.

 

The Intercooler has much more effect on cooling the intake charge than a CAI, but that's not to say a CAI is useless. Having both would be best, but intercooler is obviously more important than CAI.

Remember, the turbo heating up the charge is based off a temperature multiplier and adder. It's either (intake air temp + (turbine exhaust side temp)*(factor that indicates how much heat soaks into intake side of turbine, i.e. less than 1)) * all multiplied by compression-temperature ratio as defined by Gay-Lussac's law. (i.e. Pressure1/Temperature1 = Pressure2/Temperature2, effectively stating that if you compress something, even without another heat source, it will naturally get hotter, and vice versa, within a fixed volume (compressor housing)) or the very similar intake air temp * compression-temperature ratio + turbine exhaust side temp*heatsoak factor. Whichever formula is accurate gives you intake charge temp post compression.

The intercooler is a temperature difference multiplier as well (by a factor less than 1, i.e. decreasing the temperature, basically an intercooler will lower the temp of the intake charge by (intake charge temp post compression - ambient)*efficiency ratio. This will give you charge temp entering engine.

So what does this all mean? You'll note that if you go through the formulas, starting with a lower intake charge temperature, you'll get a lower charge temp entering engine. Everything is an adder or multiplier of the original, so it makes sense. Colder air in means colder air out.

The other thing you have to take into account for is flow of an intake setup. Make sure your CAI isn't more restrictive than what you have now, so that the flow penalty wipes out any gains you make in air density due to lower temperature.

 

I don't know if this helps but I have a 3" neoprene duct going from the empty second oil cooler area to the bottom of my stock airbox. I also have ducts going right above the radiator. The primary purpose was to separate the intake air from the intercooler air so that the turbos wouldn't pull hot air backwards through the intercooler and get fresh outside air at the same time (vice aftermarket hot air intakes). I didn't remove anything, but I did cut a small opening in the undertray to fit the hose through. Also, the hose had to squeezed quite a bit to get by the side of the radiator. All in all a very cheap intake mod (~$20). I did have to block off the hole in the intercooler duct with used to go to the intake.

 

is it just me or is the IC in the OP a xspower IC mounted front-to-back?

( https://www.rx7club.com/attachment.p...9&d=1210898023 )

 

i think anytime u can get your air filter mounted in front of your rad, your intake temps will benifit. i have mine in the stock headlight location. it draws air from the right side oil cooler opening in my cwest bumper (huge opening/ no rh oil cooler) and my intakes temps are excellent. (running SMIC coolcharge III). on a hot day. 25-30C i can keep them @ 40-45C city driving the car with moderate throttle and some 15psi pulls.
of course u need to run a flush mount headlight kit in order to do this

 

just send a pm to f150rx7 since its his car and he did the modification.

--> from what i can remember from the thread he has posted about it; his radiator is moved downwards slightly (ie sitting lower) with the fans still there. the battery is relocated and the coolent tank is reposistioned. I think the intercooler is still using the stock mounts but hes got something attached to it so the intercooler can be posistioned horizontally. I'm not sure if any welding was done, he didnt mention that in his thread.

... id go v-mount personally... his setup eliminates the airpump which would make it difficult or nearly impossible to pass emissions (apparently).

then your next step would be to manage the airflow inside the engine bay and make sure it has somewhere productive to go, like out the top of the car or to the sides somewhere somehow..... just not underneath or letting it sit in there. your intake system will become much more efficent when you have that taken care of.