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I just finished a turbo build. I wrapped my hot side and downpipe with DEI titanium wrap and the turbo has a blanket on it. Like most turbo builds, stuff is crammed together closely. I am wondering how hot is too hot for certain areas.
I currently don't have any blanket under my hood, just the painted metal. After just casual driving, no real boost, I pulled into my garage, popped the hood and measured temps with an IR gun. I measured the hood at 175*F. My rubber hose running to my catch can was about 200F, and my silicone couplings that attach my SS radiator pipes were about 300F. My aluminum intake pipe was about 150F. I also measured my manifolds and they were 600F even with the wrap and once again, no real boost. Does that seem right?
How hot is too hot for these components? Does my wrap job look OK?
For an underhood blanket, I'm looking at DEI heat screen: https://www.designengineering.com/heat-screen-36-x-40/ . I'm thinking this is necessary since I imagine that under hard boost the hood could easily get up to 220F+ and that might bubble or yellow the paint over time.
For the rubber hoses, I was looking at some DEI sleeves. But I'm not sure it even needs any protection.
For the post-intercooler intake pipe, I was thinking I could wrap with the same DEI titanium wrap, but once again, maybe it's not needed.
Has anyone ceramic coated their hotside pipes and then also wrapped them? What about that dimpled stainless cover material that I've seen?
I'm also fabbing a heat shield for my master cylinder.
Just wondering what everyone else is doing and wondering if I am getting worried over nothing.
First off, kudos on the incredibly clean build my friend.
Regarding heat mitigation, I don't personally believe you can go too far with it. @Project GatTagO used that dimpled heat shielding on his hotside but I believe he had to send it out, but man does it look great.
You could always ceramic coat and double wrap the hotside as well.
I'd also explore means of getting the heat out of the engine bay too.
My 4th gen Camaro hood would completely seal the engine bay, which meant all the heat stayed in there too, I ditched the hood mostly because I wanted to but it did make a massive difference in running temps.
Not saying you should ditch your hood but perhaps add some vents to give the heat a way out.
Visually inspect your rubber components regularly, if they start getting hard then they're getting too hot.
I don't see anything glaring but any fuel or wiring running near the hotside would get heat shielding if it were me especially if the car sees extended driving time.
As @91 Z28 mentioned, getting the tune right will also help running temps.
I wouldn't worry about the intake pipe, the air is moving so fast through it, I seriously doubt its making a difference.
If the car is running cool in the 180-190 range, then you're fine.
Mine runs in the 175-185 range but mostly around 175-180 which might be a bit cool but oh well.
Cut some LOUVERS into the hood.
I used a cut-off wheel on a ide grinders, slashed a dozen paralle slits in my ice racer hood, then gave them each a 30 degree twist with duckbill pliers. Had my transmission cooler mounted immediately under the louvers, worked okay.
You'll want to get the idle timing dialed in since it'll spend a bunch of time in that area in traffic. I had mine way too low at 14* and the exhaust was super hot. I bumped things up a couple degrees at a time until I settled on 22* and now it's just fine and not nearly as blistering hot
Thanks everyone and thanks ****** for the compliment. The car is tuned initially and runs fairly well so far. The hood does have 2 large-ish vents already. I'll take a look at the timing. Does the 600F reading seem high?
Thanks everyone and thanks ****** for the compliment. The car is tuned initially and runs fairly well so far. The hood does have 2 large-ish vents already. I'll take a look at the timing. Does the 600F reading seem high?
First off, kudos on the incredibly clean build my friend.
Regarding heat mitigation, I don't personally believe you can go too far with it. @Project GatTagO used that dimpled heat shielding on his hotside but I believe he had to send it out, but man does it look great.
You could always ceramic coat and double wrap the hotside as well.
I'd also explore means of getting the heat out of the engine bay too.
My 4th gen Camaro hood would completely seal the engine bay, which meant all the heat stayed in there too, I ditched the hood mostly because I wanted to but it did make a massive difference in running temps.
Not saying you should ditch your hood but perhaps add some vents to give the heat a way out.
Visually inspect your rubber components regularly, if they start getting hard then they're getting too hot.
I don't see anything glaring but any fuel or wiring running near the hotside would get heat shielding if it were me especially if the car sees extended driving time.
As @91 Z28 mentioned, getting the tune right will also help running temps.
I wouldn't worry about the intake pipe, the air is moving so fast through it, I seriously doubt its making a difference.
If the car is running cool in the 180-190 range, then you're fine.
Mine runs in the 175-185 range but mostly around 175-180 which might be a bit cool but oh well.
I have yet to test how well the inconel cladding works. It was done by a company called Header Shield.
I would personally be concerned with having no insulation under my hood with regards to paint longevity even without a turbo. Of course the turbo just adds a large heat sink to bake everything around it once the vehicle is shut off. The turbos are why I added hood vents on my street car even though my driving around temps were fine. I was concerned with the long term effects on plastic and rubber components when I shut it down and no more airflow exists to evacuate heat.
You'll want to get the idle timing dialed in since it'll spend a bunch of time in that area in traffic. I had mine way too low at 14* and the exhaust was super hot. I bumped things up a couple degrees at a time until I settled on 22* and now it's just fine and not nearly as blistering hot
Just for comparison I believe my current car idles around 30-32 degrees at 850rpm.
It'll idle there all day in 85–90-degree heat in heavy traffic and never get hot.
Does it though?
Typical exhaust gas temp is what, 1,200ish degrees plus or minus a few hundred degrees.
The wrap cuts it down by 50%, 600F seems on the high side but it is a turbo setup, so I'd assume more heat, I don't think I'd worry.
If the OP is really bothered by it, then ceramic coat everything and double wrap it.
Still think the heat needs a way out of the bay though.
#2 and 4 ignition COILS very close to Turbine, I applied some adhesive backed ( Peal N Stick) Foil face insulation.
Seems like about a 2.25" x 3.5" piece wrapped each of the coils.
They are VERY much cooler to the touch.
Not currently using Turbine Blanket, fiberglass dust/threads/fibers all over the right side of engine bay were bothering me.
"Playing NAKED in the street"
Just for comparison I believe my current car idles around 30-32 degrees at 850rpm.
It'll idle there all day in 85–90-degree heat in heavy traffic and never get hot.
Yes mine sits perfectly at 850 rpm @22*. I've tried upwards of 26-30 but it just caused it to high idle around 1600 rpm.
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Protecting underhood components from heat 
