Forums/Z31P/z31-performance-upgrade-forums engine-mechanical-aa/How bad would it be......
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628sx: (2011-08-23 05:30:35)
How bad would running without the heat shields be? Providing i tie everything away from
the exhaust.
springerc69: (2011-08-23 05:42:20)
I've never had a problem with it.
628sx: (2011-08-23 05:47:15)
That"s the kind of reply i"m looking for lol
Kingman: (2011-08-23 05:55:33)
Haven't ran any for years. No negatives really.
OK85ZX: (2011-08-23 06:15:38)
[archived image: nuclear_disaster.jpg]
628sx: (2011-08-23 07:11:41)
^^^ Nah, i'm only running 91
Guest: (2011-08-23 07:18:12)
Heat shields? You mean those annoying, rattling, pain in the ass, pieces of metal that randomly appear in a z31?
michaelp: (2011-08-23 13:16:59)
Ive never had any rattling, but I'll take your word for it :lol:
I don't have them on my new manifold on the 86T, or the manifolds on the 84.
NissanEgg: (2011-08-23 14:04:51)
Actually lets more heat get exposed to the plastics and wires under the hood thereby making them turn brittle quicker than with the shields installed.
On my 86T restoration, all the shields were missing, and I wound up replacing nearly every plastic/rubber part under the hood and having to replace/repair/rewire the harnesses. I have since installed mint or near mint shields where they belong.
628sx: (2011-08-23 17:18:31)
hmmmm… But if careful work is done to make sure things are far away from said heat…
Guest: (2011-08-23 18:15:42)
[quote]michaelp wrote:
Heat shields? You mean those annoying, rattling, pain in the ass, pieces of metal that randomly appear in a z31?
Ive never had any rattling, but I'll take your word for it :lol:
I don't have them on my new manifold on the 86T, or the manifolds on the 84.
Had one rattle on the slicktop and 2 rattle on the 2+2.
edicer2: (2011-08-23 18:19:12)
i have one rattle on my 86na ill be removing soon but its under the car not in the engine bay
NissanEgg: (2011-08-23 19:14:25)
You can run your car without them. You will just have more radiant heat in the engine bay, or heat leak like some people like to say.
BLOZ UP: (2011-08-23 19:44:00)
So is my alternator going to die?
NissanEgg: (2011-08-23 20:14:45)
A slow roasty toasty death :lol:
BLOZ UP: (2011-08-23 20:32:23)
I'll make a heat shield.
628sx: (2011-08-23 20:40:22)
Well, yeah maybe, but i took the weather stripping off the top of the firewall, and put a couple washers in between the hood and hinges to vent a little better
BLOZ UP: (2011-08-23 22:10:46)
Hood vent?
NissanEgg: (2011-08-23 22:53:58)
[quote]628sx wrote:
You can run your car without them. You will just have more radiant heat in the engine bay, or heat leak like some people like to say.
Well, yeah maybe, but i took the weather stripping off the top of the firewall, and put a couple washers in between the hood and hinges to vent a little better
Actually behind the hood is a very high pressure zone at speed. So the pressure zone will try to force into the backside of the engine bay with air coming in from front creating hella pressure under the hood (possible hood bulging or fluttering). If you shim up enought so that you have a slight gap on the sides it would work better at "venting".
Allout: (2011-08-24 00:24:16)
how effective would ceramic coating the manifolds and down pipe be?
628sx: (2011-08-24 00:43:52)
It'd cut the heat by a bit. Any heat coating would help, forcing the heat down the pipe to an extent.
628sx: (2011-08-25 08:47:07)
So instead of heat shields, I just wrapped the manifolds and crossover pipe in header wrap. Also i rubbed red hi temp silicone all over the wrap, because they recommend their silicone spray but it's stupid expensive . pics in the morn.