DEI - Direct Exhaust Injection (best internet post ever)
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DEI - Direct Exhaust Injection (best internet post ever)
DEI - Direct Exhaust Injection
I was laughing for a good while. This dude is getting majorly famous all over the net for his unorthodox idea. LOL
http://www.gmmodernmuscle.com/forums...sc&start=0
I was laughing for a good while. This dude is getting majorly famous all over the net for his unorthodox idea. LOL
http://www.gmmodernmuscle.com/forums...sc&start=0
Joined: Aug 2007
Posts: 1,362
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From: Oklahoma City
RE: DEI - Direct Exhaust Injection (best internet post ever)
Cause there's not enough oxygen in the SPENT exhaust to give you adequate air for combustion. It's the reason why, in a normal turbo setup, the exhaust pushes the fins to spool up and pressurize FRESH air into the intake. Robbing your intake of oxygen and just injecting pressure (and an unsteady rate, mind you) doesn't do anything for you. If you split it, and have part of the exhaust pushing in, and the other side bringing in fresh air, the pressure itself will extenguish the combustion and start forcing the otherwise weak pressue that is autmospheric pressure, and push exhaust "intake" gasses back out of the fresh air intake, which also results in aloss of pressure, which is what your whole goal was. Also, to go even further, you'd have problems (if we ignore science and reason and just run with the idea that it WOULD work) controlling the motor. What would slow it down? How would you regulate the exhaust gases to stop feeding the intake and making the engine rev more and more? Putting any kind of block in the system (the way it was drawn) would mean you didn't have a blow-off valve, which would blow seals and gaskets all over the place. (again, ignoring the fact that it wouldn't actually run in the first place.) Not to mention the SERIOUS heat that it would produce... and cold air can be pressurized more (in a normal turbo setup, this means you get more power-rich oxygen molecules in a cylinder... again... OXYGEN, which you're missing in this setup).
Simply put, you need pressure, oxygen, and fuel. Rob it of any one of these, in this case oxygen (which is used up during the ignition process), and you don't get combustion. There is no explosion. In actuality, it kills itself.
Other than that... it's funny to read. At least he was thinking of SOMETHING.
Simply put, you need pressure, oxygen, and fuel. Rob it of any one of these, in this case oxygen (which is used up during the ignition process), and you don't get combustion. There is no explosion. In actuality, it kills itself.
Other than that... it's funny to read. At least he was thinking of SOMETHING.
Senior Member
Joined: Sep 2007
Posts: 304
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From: North Dakota
RE: DEI - Direct Exhaust Injection (best internet post ever)
Why not just get rid of your intake and exhaust valves? - Then the air would just stay in the cylinder and you'd have a perpetually charged cylinder?
Not to mention no CCT noise =-)
Not to mention no CCT noise =-)
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Joined: Aug 2007
Posts: 634
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From: Lexington KY
RE: DEI - Direct Exhaust Injection (best internet post ever)
come on, guys.. we all need to stop laughing and think about important things... like how do we get the CFI aircleaner to fit in a way that hides the plumbing
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Joined: Aug 2007
Posts: 697
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From: Gainesville, FL
RE: DEI - Direct Exhaust Injection (best internet post ever)
ORIGINAL: Lrn2Go
Cause there's not enough oxygen in the SPENT exhaust to give you adequate air for combustion. It's the reason why, in a normal turbo setup, the exhaust pushes the fins to spool up and pressurize FRESH air into the intake. Robbing your intake of oxygen and just injecting pressure (and an unsteady rate, mind you) doesn't do anything for you. If you split it, and have part of the exhaust pushing in, and the other side bringing in fresh air, the pressure itself will extenguish the combustion and start forcing the otherwise weak pressue that is autmospheric pressure, and push exhaust "intake" gasses back out of the fresh air intake, which also results in aloss of pressure, which is what your whole goal was. Also, to go even further, you'd have problems (if we ignore science and reason and just run with the idea that it WOULD work) controlling the motor. What would slow it down? How would you regulate the exhaust gases to stop feeding the intake and making the engine rev more and more? Putting any kind of block in the system (the way it was drawn) would mean you didn't have a blow-off valve, which would blow seals and gaskets all over the place. (again, ignoring the fact that it wouldn't actually run in the first place.) Not to mention the SERIOUS heat that it would produce... and cold air can be pressurized more (in a normal turbo setup, this means you get more power-rich oxygen molecules in a cylinder... again... OXYGEN, which you're missing in this setup).
Simply put, you need pressure, oxygen, and fuel. Rob it of any one of these, in this case oxygen (which is used up during the ignition process), and you don't get combustion. There is no explosion. In actuality, it kills itself.
Other than that... it's funny to read. At least he was thinking of SOMETHING.
Cause there's not enough oxygen in the SPENT exhaust to give you adequate air for combustion. It's the reason why, in a normal turbo setup, the exhaust pushes the fins to spool up and pressurize FRESH air into the intake. Robbing your intake of oxygen and just injecting pressure (and an unsteady rate, mind you) doesn't do anything for you. If you split it, and have part of the exhaust pushing in, and the other side bringing in fresh air, the pressure itself will extenguish the combustion and start forcing the otherwise weak pressue that is autmospheric pressure, and push exhaust "intake" gasses back out of the fresh air intake, which also results in aloss of pressure, which is what your whole goal was. Also, to go even further, you'd have problems (if we ignore science and reason and just run with the idea that it WOULD work) controlling the motor. What would slow it down? How would you regulate the exhaust gases to stop feeding the intake and making the engine rev more and more? Putting any kind of block in the system (the way it was drawn) would mean you didn't have a blow-off valve, which would blow seals and gaskets all over the place. (again, ignoring the fact that it wouldn't actually run in the first place.) Not to mention the SERIOUS heat that it would produce... and cold air can be pressurized more (in a normal turbo setup, this means you get more power-rich oxygen molecules in a cylinder... again... OXYGEN, which you're missing in this setup).
Simply put, you need pressure, oxygen, and fuel. Rob it of any one of these, in this case oxygen (which is used up during the ignition process), and you don't get combustion. There is no explosion. In actuality, it kills itself.
Other than that... it's funny to read. At least he was thinking of SOMETHING.