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Direct Exhaust Injection

X

XT Utah

Guest
I've been looking for ways to get more power out of my Xterra and I thought about putting on a turbo. Fortunately, someone has come up with an even better idea! I'm glad I didn't spend any money yet. Let me know what you guys think...

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I got to thinking about how inefficient turbos are (compressor efficiencies of about 80% at best).

Since a turbo's function is to pressurize incoming air and force it into the upper motor, and turbos are driven by high pressure exhaust gas created from the combustion process, couldn't I just bypass the turbo altogether and route my headers back into the throttle bodies?

Since I have CFI, I could balance the DEI (direct exhaust injection as I just coined it) by feeding one header into each throttle body. Yes, the charge air wouldn’t be that cold, but it would be under a hell of a lot more pressure.

I attached a quick sketch below:

dei.jpg


There are still a few things I need to work out:

1) How do I get the CFI aircleaner to fit in a way that hides this plumbing?
2) Does anyone make a V-band clamp that will bolt an exhaust header to a CFI throttle body?
3) What pinion angle should I use in my rear-end? I’m sure there will be a noticeable difference in torque output.
 
gijohn40

gijohn40

too poor to wheel... :(
Location
Layton, Utah
there wouold be alot of things that would make this impossible... first you have very hot gases mixing with fuel causing a explosion as soon as they meet... hopefully it would be in the cylinder and on the right time...

Second... seeing the exhaust gas has already been fired there wouldn't be much oxygen left in it to cause the desired explosion again....

and last that I could think of is heat that would be rising higher with every cycle... soon it would be melting things...

I know I have not really written this out that smartly but just a quick reply here...
 
Crinco

Crinco

Well-Known Member
Location
Heber
Sorry, but it will not work. I think you are misunderstanding how a Turbo works. The air from your exhaust never re-enters the engine, the flow of exhaust gases coming out of the engine is used to spin a turbine, that turns a shaft connected to another turbine inside the intake that pushes the fresh air into the engine. The more air going in the faster the exhaust coming out spins the turbine and the faster it pushed more air in. It builds off itself very quickly.
Also, there is a limit to how much air can be forced into a stock engine, and an engine that wasn't designed for a turbo (lower compression ratio) will not handle as much as a turbo ready engine. If the pressure isn't CAREFULLY controlled your WILL blow the head(s) right off the engine.
Turbos are a great way to improve power and increase mileage.
CR
 
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DevinB

DevinB

I like traffic lights
Location
Down Or'm
John, you should at least provide the original link so credit goes where it's due. And yes, some retard actually thought he could do this, although it's not John.
 
X

XT Utah

Guest
DevinB said:
John, you should at least provide the original link so credit goes where it's due. And yes, some retard actually thought he could do this, although it's not John.
Click to expand...

I'm not sure if this is where it originated but here is my source...

http://www.gmmodernmuscle.com/forums/viewtopic.php?t=2779

Check out the replies. They are pretty funny.

BTW, thanks to everyone who honestly tried to help me with this 'project'. Sorry, I should have made it more clear that it was a joke :)
 
DevinB

DevinB

I like traffic lights
Location
Down Or'm
I just came across the original thread in Pirate, but thanks for clearing it up, John.

Brett said:
The link you added is where I saw it too, originally. The first reply is the best :rofl:
Click to expand...

This is what I was going to say. That thread was complete in just one post. :rofl:
 
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