nicklockard
Torque Dorque
D_Bat,
Reread post 117 more carefully and read about heat pipes.
Reread post 117 more carefully and read about heat pipes.
They get run through their own dedicated radiator and pump, so it adds a bit of weight to the car, but depending on the application it can be well worth the trouble..You going to run that through the cooling system? If so you'll get materially more-stable intake temperatures but for many parts of the operating paradigm they will actually go up.
The stability, however, may be well worth it and allow optimization of combustion to a degree that is much better than you can achieve with a more-common air-exchange IC.
Some Detroit 2-strokes use this arrangement with what they call an "aftercooler" physically present in the airbox under the blower. It works well.
Yep.. Overly complicated system to accomplish a very simple task, and it's not designed for high load for an extended period of time either.. What's the tow rating for a new M5?Check out how the new BMW M5 engine works... it has 4 air to water coolers working with 2 pumps
Dont know.. but have here a test of one with remap driving at WOT with 49ºC outside temp... 640hp and it is always towing 2Tones at leastYep.. Overly complicated system to accomplish a very simple task, and it's not designed for high load for an extended period of time either.. What's the tow rating for a new M5?
how long can it stay WOT? no more than 15 seconds before you let off the throttle.. Try hooking a trailer to it, put another car on that trailer, and drive down the highway at 65mph for 3 hours.. That's where an air-air system shines..Dont know.. but have here a test of one with remap driving at WOT with 49ºC outside temp... 640hp and it is always towing 2Tones at least
System is really complicated but do you think it is worse in terms of intake temps then a standard air air cooler? In this case they say they make this in order not to have lag and the engine feels like a NA
That's because your fuel and boost mapping is designed for lower temperatures. Remember that the power extraction from the fuel depends on (1) the number of molecules of oxygen available to burn the fuel and (2) the difference in degrees Kelvin between the combustion temperature and exhaust temperature. (The number of molecules of oxygen [density] is also ratably related to the temperature of the charge air.)My ALH gets VERY smoky, unresponsive, and has a noticeable decrease in power when my intake temperature goes above about 130F... No way, no how I would want intake temperatures up at 180-200F... If the goal were fuel economy then yes hot air helps, but for power it does not..
Genesis is saying to regulate it with engine coolant...Who says anything about A2W IATs doing to 180-200F? They can be every bit as cool as A2A and even more so because you have fewer constraints on how big, how many and where you place the heat exchangers to the ambient air.
Yes it is mapped for cooler temperatures because it makes more power that way. Mainly because there are more oxygen molecules in cooler air for a given (edit) volume... You know how it gets mapped for higher intake temperature? You reduce fueling which reduces power... There is a finite amount of boost/airflow a turbo can move, and I'm at about the pressure limit for my current turbo at 35psi, so my options to reduce the smoke at higher intake temperatures are to fit a larger turbo or reduce fueling.. Any larger of a turbo and there won't be anything resembling throttle response OR low end torque capability which is unacceptable for the way I use my car.That's because your fuel and boost mapping is designed for lower temperatures. Remember that the power extraction from the fuel depends on (1) the number of molecules of oxygen available to burn the fuel and (2) the difference in degrees Kelvin between the combustion temperature and exhaust temperature. (The number of molecules of oxygen [density] is also ratably related to the temperature of the charge air.)
I see. Why TH would anyone do that?! I guess most of the engineers in the world are stupid for putting intercoolers instead of interheaters.Genesis is saying to regulate it with engine coolant...