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Advanced timing can cause that to happen
I dirt track race and mine did it once it was because it was running to lean.
The exhaust gasses pass though there, and they're really hot.
The fuel mixtue has gone lean.
Normally a blocked catalytic converter or a blocked exhaust will cause that problem. Back pressure, means the gasses cannot escape. thus causing the manifolds to glow.
The back of the turbo, is the turbine. It has the hot exhaust gases flowing thru it. The exhaust gases are 1000+ degrees f. and cause the steel to glow red/yellow when under load.
Turbos use hot exhaust gases to spin the turbine wheel when the engine is under extreme loads(think a big truck going up a steep hill)the exhaust temperatures rise which makes the turbo work harder these raised exhaust temps (on long haul trucks max exhaust temp before the engine must be down rated is 650 to 750 degrees Celsius) it is these temperatures that cause the turbo to glow red hot
The glow stick in the cold water will not glow as bright as the glow stick in the hot water because when you cool the glow stick down, the chemical process will slow down. The glow stick in the hot water will glow brighter but for a shorter period of time.
The turbocharger turbine housing and exhaust manifold on any state of the art high horsepower (per litre of displacement) diesel engine will glow red as it approaches full load condition.
The engine runs fast, won't idle down, and many times the exhaust manifolds will glow red hot from the lean mixture.
The egr (exhaust gas reclaimer) has hot exhaust gas passing thru it, it will get hot.
It is normal for the exhaust to get hot. It is the result of an internal combustion engine. If the exhaust is red hot then there is a problem, perhaps from excess fuel or incorrect timing.