Man being new to turbos, the heat these things put out is simply amazing. I went from s/c'ers to turbo and there is a huge difference between the two(duh). Underhood temps are outrageous with the turbo sitting in there.

We hit the 104 today and the car was still alright coolant temp wise (205 on the highway and 215-220 in stop and go) but man when I got home, I popped the hood to let her cool down.. the heat coming out from under the hood was sick!!

I've wrapped the crossover with copper heat wrap, but coated the headers and turbo itself. The turbo also has a heatshield on the exhaust housing as well....but it feels like this stuff does very lil to quell the heat under the hood.

What can I do to help get some cooler air into the engine compartment to move some of this heat out while going down the road?

Am I just freaking out about the heat since I'm new to turbos?

Should I remove the weather stripping around the back of the hood/cowl to let the heat out while driving down the road, has anyone done this?

Any other suggestions/tips from other turbo dudes to get this heat down?

ALSO turbo guys, does your inlet side of your FMIC get pretty hot under cruise conditions(hot to the touch hot) I'm talking limited amounts of boost, more cruising that boosting. My FMIC is getting hot on the inlet side, but still very nice on the outlet side. With my ATI kit with the FMIC and Bypass valve, the FMIC stayed rather cool to the touch in normal cruising conditions. Should I return to a bypass and ditch the Tial BOV?




One a side note, my restrictor mod to the oil feedline to the turbo looks like it did the job. I went with a .109 N2O jet to restrict the -4an feedline. After 3 weeks of daily driving the car no longer smokes in normal driving. When I get into boost pretty hard, it'll puff a lil but quickly dissapates. I figure that if I restricted it too much the turbo would be toast by now.


J

 

First of all what heat shield are you using for the turbo??

 

And, the intet side of the IC should not be hot, a little warm is fine. You sure your not on boost more then your telling??...lol

 

Turbonetics heatshield as it was all the budget allowed for at the time.

As for being in boost, unless this thing is boosting and the guage not reading anything than, nope. I get into boost when getting onto the freeway @7psi for a sec or two..and switching from one freeway to another....12psi for a lil longer..
Other than that its a nice 75mph cruise home....trip time is about 15-20 minutes depending on traffic. I wish I could get into boost for longer than that, but I'm still waiting on fuel lines as i'm having a fuel issue under long WOT periods and boost.

So what would cause excessive heat at the inlet of the FMIC? My IC piping from the turbo to the inlet of the FMIC is mostly silicone and is very short, a lil under two feet.
J

 

Oh yeah, would my altitude make the poor turbo work a lot harder hence warming up the FMIC like it does? We are at 5600ft, DA today would be about 10 from the sun

 

Well first, yes the turbo will work a little harder to make positive boost, but if your cruising around, then you shouldn't be making boost at low rpms. Also is the IC piping the same diameter as the compressor outlet???

 

Yeah with the procharger, the FMIC stayed cool but the bypass was always open until I got into boost, so the FMIC stayed rather cool.
With the turbo no bypass just a BOV.

Yep, 3.0 from the turbo to the FMIC to the TB

 

Yeah the turbo will be a little warmer, but it shouldn't be hot. It will get hot if its running positive boost. Your will make things a little warmer though due to the transference of heat between the turbine wheel and compressor wheel and combined with the short IC piping. Its hard for me to say their is something wrong cause it sounds like it maybe normal heat, but since your not use to it, then it may seem like something out of the ordinary.

 

Yeah mine get hot as a ****. Pop the hood is like opening the oven for the first time.

 

hellraiser has it right

Jose, I'm thinking I'm just too new to a turbo set up. The car runs great and the coolant temps stay good for the hot *** days we've been having.

The turbo is also sucking in mega hot *** air since its right in front of the radiator and fans are blowing the hot air right into it. I think i'll fab up a five inch elbow to move the AIRFILTER up towards the top of the engine bay.
Anymore ideas and thanks for the awesome help.

 

Fwiw, turbo location made a big difference on my car as far as coolant/underhood temps.

When I had the single mounted in front of the engine, coolant temps would be 190-195 highway, and 210-215 in traffic. Lots of underhood heat.

When I switched to the twins, low mounted on either side of the engine, coolant temp always stays at 180 degrees. (doesn't even go up at the track), and underhood temps don't seem any higher than when the car was stock.

Not sure why the inlet side of your IC would be hot during cruise. Any chance the piping from turbo to IC is picking up more radiant heat than with the SC'd setup? (does it pass by/near any exhaust tubing?)

-EDIT- I see you posted that the turbo is chugging down radiator air. I would change that

 

The turbo to IC piping runs between the radiator AND crossover pipe...so its between two good sources of heat, but the section that is exposed to this dantes inferno is about 10 inches at the most...most of the IC pipe runs in the passenger side fog light box.

Outlet side of the FMIC is pretty nice, especially after I put some heat shielding around that, before the heatshielding it would get hot. After the heatshielding it stays warm all the way to the TB.

Well it looks like the placement of this beastly GT42 is causing this issue. Both crossover pipes sit pretty close to the radiator as well as the turbo itself(2inches away from the radiator)

Keep tossing out the ideas...
I have my WG hooked to the compressor housing for now until I get some better lines and go for a better tune..if that means anything???
J

 

Just caught your edit, Looks like I'll be doing this PDQ...poor IC is at a disadvantage by injesting all the hot air blowing out of the radiator and into the turbo.

Now where can I find some 5inch elbows....and what type of material...plastic, SS, aluminum..
J

 

Isnt it like 120 there in the shade right now anyways?? Forget the turbo, is the paint starting to peel yet?

 

not yet...hope to find a fix for this. I'll be stopping by the big rig place to see if they have any rubber 5 inch elbows and alumized tubing for a new intake.
J

 

cool bro...... keep me posted..... i have some pics of where there going to put mine...... im at work now so ill resize them and host them and post them in the morning....
Kyle