Small changes to reduce Heat
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Gay Lussac's law. In a container with fixed volume and fixed mass, the pressure is directly proportional to the temperature.
An exhaust stream is nowhere near a consistent field of mass, but in general this law is always true. The pressure difference between the atmosphere and the exhaust manifold drives the turbo. Cooling the exhaust causes a decrease in pressure. Therefore, if you can keep the exhaust hot you will maintain higher pressures.
In reality its not a very big difference...
It's more for underhood temps than anything.
A friend of mine had an SRT-4 with a giant Bullseye on it that literally killed three alternators from the heat alone, before he was forced to relocate it (the alternator).
A friend of mine had an SRT-4 with a giant Bullseye on it that literally killed three alternators from the heat alone, before he was forced to relocate it (the alternator).
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Keep in mind that a turbo charger has BOTH a turbine and compressor. The turbine is on the exhaust side and it is generally cast iron or stainless steel, and you want to keep the heat in if for more power, faster spooling and so on so a turbo blanket generally is a heat shield that only surrounds the turbine side of the turbo. The compressor side is on the intake side and it generally aluminum to dissipate heat quickly, and yes you want to keep the intake charge as cool as possible and that is why we use intercoolers or charge air coolers as they are also known. The cartridge is the center section of the turbo and it contains the bearings for the common shaft between the two sides. The cartridge is typically oil cooled and lubricated but is also water cooled in some cases with a water passage.
In short for best performance the compressor side should be kept as cool as possible while we want to keep the heat in the turbine side so heat wrap or turbo shields are good for the turbine side...
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Most gassers run at much lower boost and need less intercooling than a diesel with 2 or 3 times the boost. I believe EGTs are quite a bit higher in a diesel application as well. Therefore keeping the heat in the turbine will offer performance gains too on most diesels...
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I have been skimming through this thread and am wondering why heat seems to be a problem for the original poster. I live in Sydney and 90F is a nice summer day here and I have seen 117F on my outside temperature. In the heat the engine seems to run really great. I have the temperature in C on my DIC and the diesel runs 20C cooler than the petrol engine and changes very little between summer and winter. Perhaps because of the DEF, which my car doesn't have, your engines run hotter?
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Nah, its not the engine temp that was bothering me, it was the Intake temps and im sure both those mods together bring the temps down, one by lowering the intake of air away from the hood and the other containing the heat of the exhaust side of the Turbo away from everything else under the hood.
I was wondering as well why heat is an issue. My car runs great in FL, where heat ( and humidity) in the summer are a constant issue. We don't typically see over 100F , but 95-97 F with relative humidity >90% are present daily. In fact, it's not until the engine is quite toasty or at operating temp that it runs its best according to my butt dyno. I've also spoken to long haul truckers who've stated heat is typically not an issue with their rigs. It's the cold that does em in ( gelling etc.).
As as to DEF, I don't believe that has anything to do with it as that's way after the combustion process and would be more an exhaust issue. Anyone else have issues with heat and their CTD??
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Im deleted, so DEF doesnt exist for me.
Im just an aggressive driver and i did some Racing, so i notice the difference of Heat soak right away on the performance. 95% of Diesel owners wont notice that.
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I have a turbo diesel in Australia and we don't have DEF in my 2012 model. I have driven in temperature of 47C (117F) and the car loves it. Engine temperature is around 85 most of the time and the highest I have seen is 91C.
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FYI I did end up installing this on a diesel cruze sometime last year.
https://turbo-performance-products....page/products/t3-t4-non-wastegated-turbo-sock
It fitted just fine. The included wires are a bit short so you may want to include your own. It will take a lot of finagling to get the blanket on so be prepared for some tight squeezes. The heat shield does sort of fit over the top of it... But it will rub a little so be mindful of that. You'll have a lot of trouble fitting everything around the dpf, but it is possible.
The Cruze is pretty cold blooded even with aggressive tuning (at least the NA LUZ). So it's nice to keep what heat you do generate in the engine. I'm not going to say it's worth it or not worth it. It's really in between.
https://turbo-performance-products....page/products/t3-t4-non-wastegated-turbo-sock
It fitted just fine. The included wires are a bit short so you may want to include your own. It will take a lot of finagling to get the blanket on so be prepared for some tight squeezes. The heat shield does sort of fit over the top of it... But it will rub a little so be mindful of that. You'll have a lot of trouble fitting everything around the dpf, but it is possible.
The Cruze is pretty cold blooded even with aggressive tuning (at least the NA LUZ). So it's nice to keep what heat you do generate in the engine. I'm not going to say it's worth it or not worth it. It's really in between.
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