Thread: Intake air temps before and after intercooler.

Turbo noob here. Please go easy on me..LOL
I am in FL with a boosted NX so I am trying to maximize the airflow and make as many improvements withing reason to lowr my intake temps and underhood heatsoak

What are the avg/max temps for turbo cars before and after the intercooler?
I am just looking for a range I should target on both sides to get the IAT down as much as I can.
I suppose anything around ambient is ok,just looking for input from the boost-gurus

I see all the gauges go to 250 or 300 so I have to assume its gonna be less than that on the hot side.
Thanks in advance

It really depends on the ambient temps, air inlet location (under hood versus cold air intake) compressor efficiency at the boost you are running, heat soak from other hot parts, and efficiency of the intercooler and size. Lot of variables.

One thing you can do is to have an actual cold air intake for the turbo inlet which can help lower overall air system temps. Remember higher boost levels will generate more heat.

Other tricks are to have an intercooler sprayer system, or you can do water/meth injection.

Everything said above is true and good info

You seem like you are going nuts with temp stuff lately eggman. Dont focus on it too much, you will loose your mind like i did once chasing temp related issues. Things will be hot and heatsoak super fast in FL summer.

Just toss some e85 in the car, have the nemu pull a little timing when temps above 102*F and call it quits.

Quad turbocharged powerplant/ship engines target 140*F charge air cooler temp all day everyday. Our engines can even handle more than that momentarily. Do what D-unit said, and have NEMU correct if temps get out of hand.

Intake to turbo is cold air in fender already,hot side piping is heat wrapped.
I already have a DIY sprayer system just gotta install it.
I have a NEMU aalready in the car,but E85 is scarce around me,otherwise I would use it as much as I could....this car was actually dynotuned on e85 ,but I put a 93 Octane base tune in it when I got it....so I need to get it fine tuned on 93 still.

Thanks!!
Intake to turbo is cold air in fender already,hot side piping is heat wrapped.
I am trying to avoid adding meth/water,but already have a DIY sprayer system just gotta install it.
I have a NEMU already in the car,but E85 is scarce around me,otherwise I would use it as much as I could....this car was actually dynotuned on e85 ,but I put a 93 Octane base tune in it when I got it....so I need to get it fine tuned on 93 still.


I havent really started to learn to tune with Nemo yet so I need to get with it....actually I thought of hitting you up to see if you want to help me tune it....I uually take my cars to Gio down south ,but hes so busy with school family work,its been tough to nail him down.
PM me if you are interested in helping out.

As far as this thread goes...yes ,I am obsessing about this.I figured I will never make the intake charge too cold..LOL

I was mostly looking for what the range of the temps are so I can get a proper IAT gauge before I make any changes/add the sprayer(so I can see the difference,if any)

car is on speed density/MAP already too.

hey guys, in this subject, i do have a cold air intake. directly above my HKS open pod filter, i have 4" hole drilled on my engine bonnet, I retro fitted a 4" pvc pipe coupling and finished it with a speaker mesh net. even the cops couldnt tell it was retrofitted, looks pretty STOCK.

the difference is alot, during long journey on the highways, the respond is even better, the only bad thing is you can hear the hissing sound loudly everytime you floor it, the turbine swirling sound is really loud.

about rain, nothing ever happened, so far so good. the mesh net helps to disperse the rain drops. even pouring rain have no harm. the only worry is flash flood or puddles which I would drive really slowly.

btw, im running with 215/60 R17..... my car is like 5" above ground LOL

will share pictures later

just a fact that, when our car moves more than 60kph, the vacuum effect draws the hot air away down wards. all you need is a big scoop on top of your engine hood so there are much ventilation, dont over do the cold air intake or too much wrapping, and side bumper intakes are scary during floods. you dont really wanna suck in the water on the road.

Glad someone made a thread on this, I have a top mount bluebird in my NX as well with heat issues. I ran a water meth kit on a external controller (not linked to my megasquirt) and had it operating between 2-4 lbs of boost on a 12psi system (t25 with the boost all the way up). I also made a air damn from the Subaru hood scoop to the intercooler to where any/all air that goes inside the scoop was going forcefully through the intercooler. IAT's were not recorded to the before and after of those couple modifications. If I had to assume they were through the roof; reason I say that is my laptop temp gauges (from stock water temp locations) would climb gradually but none the less continuously on the freeway up to around 215 . *** Remind you I live in Arizona where the summer heat reaches 110 practically daily*** I run a water temp fail safe at 220. I've ran the car in this heat for about 2-3 months now and I've finally decided to run a IAT sensor, flex fuel sensor, and swapping the fuel system to e85. I should be able to have some information on IAT's shortly with e85 flowing through the motor, as well as possibly seeing water temps drop as well; who knows. I should know within about 3 weeks. Also running an oil cooler & hood spacers FYI. I also thought about making a back plate under the top mount intercooler wrapped in heat wrap so perhaps absorb and reflect the heat coming from underneath the intercooler and reduce the heat soak I think I am getting. I can post pictures of the air damn I've made and hood scoop for anybody that may need an idea on how to do one. I practically used the same method as a GTIR before I even knew the GTIR's had a intercooler to hood seal (AKA hood bonnet)