Headers glowing bright red!!!
Oct 22, 2007, 11:36 AM
#46
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listen, all i can tell u is what i have personally expierenced. i have never seen my manifold glowing even slightly red. what does this have to do with me being a mech engineer? im only going by what my car does.
Oct 22, 2007, 11:55 AM
#47
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Some generally accepted specs - stainless, cast iron, it doesnt really matter what the emitter...
C F Color
400 752 Red heat, visible in the dark
474 885 Red heat, visible in the twilight
525 975 Red heat, visible in the daylight
581 1077 Red heat, visible in the sunlight
700 1292 Dark red
800 1472 Dull cherry-red
900 1652 Cherry-red
1000 1832 Bright cherry-red
1100 2012 Orange-red
C= Centigrade
F= Farenheit
And remember the outermost surface of material must be at these temps to get the emitted light...and so we can assume the EGT is higher due to convection in the engine bay. So, yes its possible and with retarded timing, probably likely.
C F Color
400 752 Red heat, visible in the dark
474 885 Red heat, visible in the twilight
525 975 Red heat, visible in the daylight
581 1077 Red heat, visible in the sunlight
700 1292 Dark red
800 1472 Dull cherry-red
900 1652 Cherry-red
1000 1832 Bright cherry-red
1100 2012 Orange-red
C= Centigrade
F= Farenheit
And remember the outermost surface of material must be at these temps to get the emitted light...and so we can assume the EGT is higher due to convection in the engine bay. So, yes its possible and with retarded timing, probably likely.
Oct 22, 2007, 12:06 PM
#48
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One Hundred Percent Completely Stock, regularly maintained 2003 EVO Daily driven, never broken down.
And I never tire from popping the hood at night while its idling to cool down and watch the turbo glow bright red. I do it all the time. (last time was sometime last week)
50-60 cruising aint gonna cut it, 3rd or 4th gear 60-70 you might see a little if you know what your looking for and where to look and check quick and its really dark out, repeated full throttle 100+ hard redline acceleration after any of the above, and the turbo will be glowing quite nicely.
I think fast lapping of a race track would get it glowing quite well, but if its sunny out, you might not see it, and if you take a cool down lap, or don't get to the pit and pop the hood immediatly it cools off pretty quick, 30 seconds maybe.
And truthfully, does anyone other than me specifically pop their hood just to see the turbo glow?
And I never tire from popping the hood at night while its idling to cool down and watch the turbo glow bright red. I do it all the time. (last time was sometime last week)
50-60 cruising aint gonna cut it, 3rd or 4th gear 60-70 you might see a little if you know what your looking for and where to look and check quick and its really dark out, repeated full throttle 100+ hard redline acceleration after any of the above, and the turbo will be glowing quite nicely.
I think fast lapping of a race track would get it glowing quite well, but if its sunny out, you might not see it, and if you take a cool down lap, or don't get to the pit and pop the hood immediatly it cools off pretty quick, 30 seconds maybe.
And truthfully, does anyone other than me specifically pop their hood just to see the turbo glow?
Oct 22, 2007, 12:07 PM
#49
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Some generally accepted specs - stainless, cast iron, it doesnt really matter what the emitter...
C F Color
400 752 Red heat, visible in the dark
474 885 Red heat, visible in the twilight
525 975 Red heat, visible in the daylight
581 1077 Red heat, visible in the sunlight
700 1292 Dark red
800 1472 Dull cherry-red
900 1652 Cherry-red
1000 1832 Bright cherry-red
1100 2012 Orange-red
C= Centigrade
F= Farenheit
And remember the outermost surface of material must be at these temps to get the emitted light...and so we can assume the EGT is higher due to convection in the engine bay. So, yes its possible and with retarded timing, probably likely.
C F Color
400 752 Red heat, visible in the dark
474 885 Red heat, visible in the twilight
525 975 Red heat, visible in the daylight
581 1077 Red heat, visible in the sunlight
700 1292 Dark red
800 1472 Dull cherry-red
900 1652 Cherry-red
1000 1832 Bright cherry-red
1100 2012 Orange-red
C= Centigrade
F= Farenheit
And remember the outermost surface of material must be at these temps to get the emitted light...and so we can assume the EGT is higher due to convection in the engine bay. So, yes its possible and with retarded timing, probably likely.
ok so we can say that with those ballpark #'s, the exhaust mani runs about 700-800 degrees F daily driving. so like i said, u souldnt be able to see it glowing red after some daily driving. also my definition of glowing red looks something likes this....
so like i said, if u are seeing this daily driving, something is wrong
Oct 22, 2007, 12:14 PM
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just making sure so others will stop looking at me like im a know it all jackass.
Oct 22, 2007, 12:15 PM
#52
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And deadbeat, while it wasn't as bright as that pic, (looks like the pic was taken at twilight)
I think what i have seen from my stock turbo & manifold would meet your definition (for sure at night)
And I agree definitly not after regular daily driving, you need to work it pretty hard.
I think what i have seen from my stock turbo & manifold would meet your definition (for sure at night)
And I agree definitly not after regular daily driving, you need to work it pretty hard.
Oct 22, 2007, 12:17 PM
#53
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No no no, you can see 700-800 Celcius not Farenheit, and thats just DD. You will be much higher when pushing it or on decel if your injectors dont cut fuel immediatly.
You getting the units mixed up like nasa man.
You getting the units mixed up like nasa man.
Last edited by DougoeFre5h; Oct 22, 2007 at 12:20 PM.
Oct 22, 2007, 12:22 PM
#54
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Some generally accepted specs - stainless, cast iron, it doesnt really matter what the emitter...
C F Color
400 752 Red heat, visible in the dark
474 885 Red heat, visible in the twilight
525 975 Red heat, visible in the daylight
581 1077 Red heat, visible in the sunlight
700 1292 Dark red
800 1472 Dull cherry-red
900 1652 Cherry-red
1000 1832 Bright cherry-red
1100 2012 Orange-red
C= Centigrade
F= Farenheit
And remember the outermost surface of material must be at these temps to get the emitted light...and so we can assume the EGT is higher due to convection in the engine bay. So, yes its possible and with retarded timing, probably likely.
C F Color
400 752 Red heat, visible in the dark
474 885 Red heat, visible in the twilight
525 975 Red heat, visible in the daylight
581 1077 Red heat, visible in the sunlight
700 1292 Dark red
800 1472 Dull cherry-red
900 1652 Cherry-red
1000 1832 Bright cherry-red
1100 2012 Orange-red
C= Centigrade
F= Farenheit
And remember the outermost surface of material must be at these temps to get the emitted light...and so we can assume the EGT is higher due to convection in the engine bay. So, yes its possible and with retarded timing, probably likely.
Based on the chart you posted looks like you can see 400C at night 752F
Last edited by mis4tun81; Oct 22, 2007 at 12:29 PM.
Oct 22, 2007, 12:38 PM
#56
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another good point to y u shouldnt see a "glowing mani" durning daily driving is because we have a huge vent in our hood that allows a significant amount of energy out. also think of highway driving, cruising at 70mph, air getting to the mani and turbo is close to 70mph as well, so there is a lot of cooling there. the "DSM GUYS" dont get that these may be the same engines but different beasts all together.
Oct 22, 2007, 01:19 PM
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Also watch your definition of daily driving.
I drive my evo hard and put it away wet on a fairly regular basis, i bet i'm not the only one.
an evo daily driven is quite a bit different than a Dodge Caravan daily driven.
I drive my evo hard and put it away wet on a fairly regular basis, i bet i'm not the only one.
an evo daily driven is quite a bit different than a Dodge Caravan daily driven.
Oct 22, 2007, 01:28 PM
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Oct 22, 2007, 04:08 PM
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I re read the original post, and he was asking about the headers.
I took this pic after a spirited drive home, It was still light out and the turbo was shaded under the shroud, but the results are no glowing headers (and I was so sure... sorry)
I might go out this evening and run the same test. I was so sure I've seen the stock headers glowing, but not nearly as much as the turbo.
I also ran 55-60 in 4th gear and 55 to 60 in 5th gear and the turbo was just barely glowing after each run, more so after the 4th gear run.
So I think daily driving will get the turbo glowing but probably not the manifold.
Its getting dark out I might have to go for a drive.
I took this pic after a spirited drive home, It was still light out and the turbo was shaded under the shroud, but the results are no glowing headers (and I was so sure... sorry)
I might go out this evening and run the same test. I was so sure I've seen the stock headers glowing, but not nearly as much as the turbo.
I also ran 55-60 in 4th gear and 55 to 60 in 5th gear and the turbo was just barely glowing after each run, more so after the 4th gear run.
So I think daily driving will get the turbo glowing but probably not the manifold.
Its getting dark out I might have to go for a drive.
Last edited by mis4tun81; Oct 22, 2007 at 04:14 PM.
Oct 22, 2007, 10:45 PM
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another good point to y u shouldnt see a "glowing mani" durning daily driving is because we have a huge vent in our hood that allows a significant amount of energy out. also think of highway driving, cruising at 70mph, air getting to the mani and turbo is close to 70mph as well, so there is a lot of cooling there. the "DSM GUYS" dont get that these may be the same engines but different beasts all together.
