aluminium exhaust, a good idea?

**oldcorollas** · 02-03-2009, 06:00 PM

shhhh

as far as heat goes, aluminium oxide is almost a black body for radiation (as are many oxides) so what heat goes in one side, just come out the other side....

so if you had a thin oxide sheet, and it was close enough to actually be heated, then you could sort of diffusely "see through" it, but it would be more like a primitive Predator camo suit, where what goes in one side gets sent out other side...

**rolleraction** · 03-03-2009, 02:20 PM

I know what wombat means,
I had a turbo that you could swear you could see the gasses flowing along the manifold runners & trough the turbo when it was extremely hot after a high speed freeway run late at night. I used to pull off the highway quickly and open the bonnet to show people the 'glowing light show' that was my turbocharger Perhaps just radiant heat, but I do know what he means as I have seen it also. ..err whatever it was I saw...

Or was it those funny little pills I popped beforehand..........?

**amichie** · 03-03-2009, 07:56 PM

A thin layer of hot air can be reflective. Like when you drive on a country road on a hot summers day and you look ahead at the road on the horizon and it appears to either be wet or like a mirror is laid flat on the road.

This thin layer of hot air on the surface is a low density, low refractive index layer that acts like a mirror through a process known as total internal reflection.

It may be that the hot air sorrounding hot turbo housings may be acting as a reflector in a similar way.

**cambelt** · 03-03-2009, 08:38 PM

I remember many years ago pasing a truck with a holden six going up the wesgate bridge and could see thru the glowing manifold at all the exhaust gases coming out the ports . Nearly crashed in the process lol
Dave

**d.s** · 12-06-2009, 04:08 PM

it will just melt and calaps lol

**takai** · 12-06-2009, 04:34 PM

Are you on crack? This thread is 3 months old, and then all you add is a small piece of meaningless dribble.

Add that to the further dribble in LadySX's thread, and you just scored some rep my man.... and not of the positive kind.

**Billzilla** · 13-06-2009, 10:37 AM

Originally Posted by takai

Are you on crack? This thread is 3 months old, and then all you add is a small piece of meaningless dribble.

Add that to the further dribble in LadySX's thread, and you just scored some rep my man.... and not of the positive kind.

Heh that's the lowest rep I've ever seen here. lolz ....