Oh, I used a heat shield from a server to bend for a template. It fits perfectly.

It is electroplated steel they had laying around. Heat reduction properties should be the same as stainless. I got some heat barrier tape and that should work. Thinking about putting it on the radiator side as that is where the heat needs to be reflected. Might paint the filter side with heat resistant paint, like black?

 

I finished the first phase of the heat-shield and it is keeping IAT temps ~20F cooler, very good sign. Next I will change the bend on the intake pipe to have less of an angle on it and allow me to make an addition on the back (in between the turbo and filter) which should help with engine bay heat isolation as well. Here is a picture of it installed now.

 

excellent... yea straighten that thing out and block the back section a little bit and youll be on your way. you can help that piece you made by putting some reflective tape or some sort of barrier on it to cut back on the conductive heat. getting that front section between it and the fuse box closed up would be idea as well.

 

Yes, I did close that area off between the fuse box by adding the pipe insulation I used on top. It just has a little space under the fuse box that I need to shore up.

Thanks for the help!

 

Thanks for the progress updates. I will need to do a form of the same in the future. I currently have a V mount, but when I do my larger build will run into the same issue. Was planning for a turbo blanket, wastegate blanket, Mica shield between the turbo and LIM, then a shield and airbox for the filter to pull fresh air from the front of the car.

I also have a vented hood, so I am hopefully the air movement will further hep pull heat away as I drive.

 

Hi Iceman, Yes, I am hoping the vented hood will pull out the fresh air from the bottom and also the front. I am working on creating some ducting like the Auto EXE intake from the front bumper. Seems like the 99 has more airflow from the front so I want to grab that from the spot next to where the hood latch is..... if I can duct that air into my soon-to-be airbox, that would be ideal.... I think.... but will keep an update on the progress here.

 

that is exactly what I am doing. I would like to build a box and pull from the front end. Attached is a photo of my existing setup with the twins. I have an aluminum shroud around the center of the 99 bumper that forces air through the IC and Radiator. My idea is to cut a hole and the airbox to this area.

Will have a lot of engine bay changes this year.

 

It seems that is the best place to pull the cool air from as long as we isolate it from the engine heat! I should have the filter moved today and then need to fabricate the rest of the box at my work shop. I am also thinking of 3D printing the ducting and might try with ASA first... the heat temp is a bit low but I think it will work at the front.

 

Old orientation
Ok, finished redirecting the filter, next steps is to build the box around it and duct air from the front as well.

New Intake location

 

Looks a lot better. Get a mica shield between your LIM and turbo. Should help further.

 

Thanks! That is my next step. I will have to look at the difference in Mica and steel or aluminum. Honestly, I have never heard of Mica but will look it up.

 

@Howard Coleman posted the differences in thermal conductivity of several different materials somewhere on here. I'm just having a hard time finding the thread. I found one where he discussed the difference between mica and Inconel, but I know there was a thread where he dove into many different materials.

 

Awesome! Would love to read that one. Let me try and look as well.

 

SYSTEM DESIGN

From his website...

"Combine the 12 X 13 inch Mica sheet with a PTP Lava Turbo Blanket to reduce under hood temperatures and you are set.

A turbo blanket, PTP or otherwise, will greatly help reduce underhood temperatures but is insufficient to eliminate LIM runner heating. Only Mica will solve the problem.

Mica P/N 85165K82 @ McMaster Carr (1/4 inch)

Mica P/N 85165K81 (1/8 inch)"

https://www.mcmaster.com/catalog/131/4192/85165K82
https://www.mcmaster.com/catalog/131/4192/85165K81

 

Awesome! Thank you. Do I just need the Mica on the wall of the box that is facing the turbo? Also can i build the back side with aluminum and then put Mica on it later?

 

I would try and replicate what Howard did. Hopefully you have a turbo blanket currently. Howard had the Mica shield with welded tabs that use the upper and lower manifold bolts to hold it in place. He just used a solid 1/4" piece thats 12"x12" I believe. I wouldnt bother to build out of aluminum and try to attach the Mica. Just use the thicker Mica and weld brackets.

Since you are already separating your filter with colder air, I think this would be a great combination to keep all heat away from intake parts completely.

 

Oh, I see it is in-between the exhaust and intake turbine side.

 

Yes. To completely separate the heat source from your LIM. This should help avoid heat soak on the LIM after a few pulls without the shield.

 

Today I had a long cruise down to Cars and Coffee (Houston) at Daiken Park. The IAT temps were much much lower just from the shield and moving the filter closer to the air source. Driving there in the morning it maxed out at 109 F. Coming home in Traffic it maxed at 118. Very happy so far.

 

In order for me to get better temperature readings without heat soak is there an option for just a replacement temperature sensor? Here is something I found on the Web but not sure it would work. It seems it would be best to replace the existing IAT Sensor if I could get one that would not heat soak.

Thoughts on this one?

https://wannaspeed.com/en/home/7-88-...harness_93_rx7

 

You can.... but heat soak will be a condition so long as the sensor is in the stock location. It's really not that critical now that you have the situation under control. It's all just reference anyway. You're not at the limits of anything so whatever +/- the stock sensor is reading is perfectly fine. There would be no value in switching to an open element sensor or moving the sensor from the stock location in your application.

 

Thank you FDAuto! The temp sensor is relatively cheap, and I want to be able to compare the IATs when I change around my intake setup and possibly a V-Mount later. I also kind of want to see the real temp without the heat soak. Question though: There is a place in the back of the stock elbow where I have seen some hoses coming out (not sure if it is for Vacuum or what), but mine is just a flat round spot. I am assuming it would be ok for me to drill that out and mount the sensor there?

 

The fast reacting sensor, does what it say, it reacts faster, which is good. most people also relocate it to the intake elbow, however that flat blank spot does not get very good airflow, unless the throttle is open, and i found it actually heat soaks more than the stock location. if you relocate the sensor, it needs to be in a place where it gets flow with just the primary throttle open.

i've been really happy with the fast sensor in the stock location.

 

Oh Great! You don't get heat soak in the stock location with the fast sensor?

 

not really, temps go up with the throttle closed and the car not moving much, but if you open the throttle temps come right down.
its unclear to me if temps are high at low speed/low throttle because temps are high, or its because there is something about the sensor.
i haven't thought of a good way to test it, or i would. its also probably a little of both.

for example, my car i can cruise on the freeway on a 28c day and temps are ~32c. if i get a long stop light, temps come up to the mid 40's, i'm not sure if this is because they are in the mid 40's or its heat soaking the sensor.
any big throttle opening, and its in the low 30's again though.

i did previously have the intake temp sensor in the flat of the elbow, and that for sure isn't a goo place for it! temps just go up the longer you drive.
if you did put the sensor in the elbow, it needs to be where it gets airflow, like the Cosmo