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Old 07-26-2015, 07:23 PM   #1
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Default How necessary is a heat shield?

Fm voodoo II kit and I've drove 200 boosted miles without the shield provided by FM. I know there are important brake lines and heater hoses behind the manifold and downpipe, but are the pros of the heat shield (what are they?) enough to outweigh the ugly shield?
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Old 07-26-2015, 07:27 PM   #2
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Can a mod move this to the appropriate section? Sorry
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Old 07-26-2015, 07:56 PM   #3
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I wouldnt call it necessary for a street car. I also wouldnt call it ugly.

Its going to keep the heat out of the master cylinder(s) in particular. As well as protect some of those hoses. The heater core hoses usually get cooked pretty bad on these cars. Whether you run the shield or not I would recommend wrapping them in some sort of heat wrap.
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Old 07-26-2015, 08:38 PM   #4
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Is there anyway heat from the manifold and turbo could be dissipating less because of the shield? I usually like to open the hood up when I come back from a run and let the heat escape. What's more important...letting heat get away from the turbo or protecting the master cylinders?
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Old 07-26-2015, 09:01 PM   #5
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The heat has to go somewhere. Usually soaking into stuff you dont want it to soak into.

Why would you want the dissipate the heat from the turbo? Its not aircooled.
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Old 07-26-2015, 09:04 PM   #6
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I can't think of a con to having the heatshield other than miniscule weight and aesthetics (which you could argue either way). I ran one with my original BEGI kit but I don't currently have one on the car. On a street car you can definitely get away without it and you could probably get decent money selling it if you really don't like it. On a track car I'd imagine you're going to want to protect the brake master and coolant/vacuum lines in the area.
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Old 07-26-2015, 09:24 PM   #7
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<p>I don't have one on my street car, but my downpipe is 4&quot; farther forward than yours. I will have one on&nbsp;there before I track it though.&nbsp;</p><p>I have stick on heat shielding on the bottom side of&nbsp;the hood, so the shield will be vertical only, and the turbo will be seen when the hood&nbsp;is opened. I think that is a good compromise between function and aesthetics.&nbsp;</p>
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Old 07-26-2015, 09:31 PM   #8
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I like the stick on heat shield idea. Never thought of that. All this track vs street use is confusing. When I take my car out, I guess I drive it like I'm on a track but it has a lot more time to cool down say at a stop light or something. And I'm not going consecutive minutes at wot. I think I'm pretty in between street and track. I will run the car with the heat shield a few times, shoot a laser thermometer at the master cylinders and such, then do so runs without and compare the Temps. If the temps aren't drastically down, then no heat shield for me
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Old 07-26-2015, 09:44 PM   #9
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I am running thermo tec stick on heat shield under my hood as well. Holding up great to street use. I have all nearby hoses and brake lines wrapped. I will eventually build a shield around the master cylinder.
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Old 07-26-2015, 09:45 PM   #10
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Quote:
Originally Posted by stratosteve View Post
I am running thermo tec stick on heat shield under my hood as well. Holding up great to street use. I have all nearby hoses and brake lines wrapped. I will eventually build a shield around the master cylinder.
What are the hoses and brake lines wrapped in? Same stuff as on hood?
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Old 07-26-2015, 10:24 PM   #11
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Quote:
Originally Posted by LownSlow616 View Post
What are the hoses and brake lines wrapped in? Same stuff as on hood?
I used thermo tec express sleeves and also a roll of their 2000* tape.
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Old 07-27-2015, 06:03 PM   #12
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How is putting tape on the hood going to help the brake lines and heater hoses?
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Old 07-27-2015, 06:29 PM   #13
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It's not. Thermo tec also sells different diameter sleeves that u can out around houses and lines
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Old 07-27-2015, 06:36 PM   #14
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Quote:
Originally Posted by z31maniac View Post
How is putting tape on the hood going to help the brake lines and heater hoses?
I am simply trying to protect the paint from heat damage. The stuff on the hood is thick. It is a woven material with adhesive on one side and reflective material on the other. It works. I put my hand on the hood directly over the turbo/manifold after a good run. It was warm and the paint is safe.
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Old 07-27-2015, 07:51 PM   #15
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Quote:
Originally Posted by LownSlow616 View Post
Can a mod move this to the appropriate section? Sorry
We don't have a stupid question section.

It's necessary enough that all the major turbo kit makers for a miata include one.

you might not melt stuff immediately on a street car, but I guarantee you that eventually all the stuff around the hotside will disintegrate
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Old 07-27-2015, 08:49 PM   #16
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I can't find the thread but i remember savington recommending no heat shield and wrapping stuffs nearby?
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Old 07-27-2015, 08:51 PM   #17
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Coolant (glycol) is flammable and will burn even if the water doesn't. The brake master cylinder will melt and you will lose brakes. The dipstick handle can melt inside the tube and clog your oil pump. Your brake fluid can boil at 300ish degrees an you can lose brakes.

And no, don't humor yourself that driving like a shitass punk on the street for a couple of minutes at a time is anything like driving on the track. Actually driving on the track will be the only cure for this belief, though. You will probably think I am a "hater" or some other similarly juvenile term. I accept that.
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Old 07-28-2015, 01:58 AM   #18
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Quote:
Originally Posted by sixshooter View Post
Coolant (glycol) is flammable and will burn even if the water doesn't. The brake master cylinder will melt and you will lose brakes. The dipstick handle can melt inside the tube and clog your oil pump. Your brake fluid can boil at 300ish degrees an you can lose brakes.<br />
<br /><br />
<br />And no, don't humor yourself that driving like a shitass punk on the street for a couple of minutes at a time is anything like driving on the track. Actually driving on the track will be the only cure for this belief, though. You will probably think I am a "hater" or some other similarly juvenile term. I accept that.
<br />
<br />Props.
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Old 07-28-2015, 02:06 AM   #19
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Quote:
Originally Posted by sixshooter View Post
Coolant (glycol) is flammable and will burn even if the water doesn't. The brake master cylinder will melt and you will lose brakes. The dipstick handle can melt inside the tube and clog your oil pump. Your brake fluid can boil at 300ish degrees an you can lose brakes.<br />
<br /><br />
<br />And no, don't humor yourself that driving like a shitass punk on the street for a couple of minutes at a time is anything like driving on the track. Actually driving on the track will be the only cure for this belief, though. You will probably think I am a "hater" or some other similarly juvenile term. I accept that.
<br />
<br />Props.
<br />
<br />Heat sheilds can be fun.
<br />
<br />
<br />
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