Compound Turbo Charging Theory
#41
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no it's not.
An AC system works like the small turbo and intercooler. To extend the AC analogy to this the entire motor would need to a have it's cross sectional surface area increased. The AC unit cools the cabin air while the refrigerant is expanded (post compression and radiation). In this case you are expanding the intake charge, then recompressing it again before you put it into the motor.
An AC system works like the small turbo and intercooler. To extend the AC analogy to this the entire motor would need to a have it's cross sectional surface area increased. The AC unit cools the cabin air while the refrigerant is expanded (post compression and radiation). In this case you are expanding the intake charge, then recompressing it again before you put it into the motor.
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In this case we are going to take air and compress it to say 100PSI. That should put the air temp around 700*F give or take. Agreed? Ok, now what happens when we move 700*F air through an air to air intercooler? A shitload of heat will be dumped. The air will become denser. Now, out of the IC we have air that's at a lower temperature then it was, but still under the same pressure. Agreed?
Ok stop. Assume the engine is not getting boost. Let's just dump this air out into the engine bay instead. What's gonna happen when that air is dumped to atmosphere? It's gonna get really really cold.
In this case, we are compressing the charge, radiating a lot of heat from it, then expanding it back. Same as an A/C system except there is no phase change involved as there would be with a refrigerant.
Ok stop. Assume the engine is not getting boost. Let's just dump this air out into the engine bay instead. What's gonna happen when that air is dumped to atmosphere? It's gonna get really really cold.
In this case, we are compressing the charge, radiating a lot of heat from it, then expanding it back. Same as an A/C system except there is no phase change involved as there would be with a refrigerant.
#43
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Originally Posted by pat
They intercool it to get temps down, then the boost goes through an orifice tube to drop boost, which causes air temps to fall.
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So, what part don't you understand? Why would it have to be recompressed by going through a whatever? I never said I was doing that.
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This theory sounds as if it might actually work. I just wonder why it hasn't been done before if it could work so well. Were talking LOW intake temps, which translates into ALOT more power per lb of boost.
Not saying it cant work, you might be on to something.. subscribed to this thread, maybe corky will chime in
Not saying it cant work, you might be on to something.. subscribed to this thread, maybe corky will chime in
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#46
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Yea, it's basically just exaggerating what everyone already does with the typical turbocharger setup. Seems advantageous to me. I'm so tempted to try it. Probem is I love my power steering and A/C, and don't want to remove them to make room for the two turbos.
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I imagine it would be inside or right before the throttle body, maybe an extention of the throttle body itself? A malfunction of this device would surely result in engine failure unless it has some kind of fail safe. Overboosting 100+psi doesnt sounds good haha.
Maybe just have an orfice that the compressed air will come out of- but make it small enough that manifold pressure will only be 12 psi max or whatever boost you want to try to run. Have different sized orfices for different levels of boost?
Im not sure how linear it would be or if that would work at all really.
Maybe just have an orfice that the compressed air will come out of- but make it small enough that manifold pressure will only be 12 psi max or whatever boost you want to try to run. Have different sized orfices for different levels of boost?
Im not sure how linear it would be or if that would work at all really.
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