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Unread 02-23-2012, 08:20 PM   #1
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Default Quick question regarding turbo exhaust gasses?

2.0 L engine at 2000 RPM at 5 psi of boost with atmospheric pressure at a normal 14.7 psi.

2.0 * 2000 = 4000 / 2 = 2000L

Would it dump out 2000 L of exhaust gasses per minute

OR

14.7 + 5 = 19.7 / 14.7 = 1.34 * 2 = 2.68 * 2000 = 5360 / 2 = 2680 L

or would it dump out 2680 L of exhaust gasses per minute?

Basicly I'm asking do gasses decompress in a turbo applicaton once they leave out the exhaust valve?

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Unread 02-25-2012, 01:30 PM   #2
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No one knows?

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Unread 02-25-2012, 05:16 PM   #3
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Interesting question.

Maybe try asking this on nissanroadracing.com - The majority of the active members on the forum are engineers and I know somebody will point you to an answer.
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Unread 02-25-2012, 09:59 PM   #4
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This is a very complex subject. Start reading!
Turbocharger Compressor Calculations

Turbo and Supercharger Maps

http://www.lovehorsepower.com/joomla...id=4&Itemid=88

I do know you add the boost on top of atmospheric pressure (1bar (14.7psi)).
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Unread 04-07-2012, 02:05 AM   #5
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The volume of the exhaust gas is going to be greater than the volume of air going in, but how much depends quite a bit on the EGT, exhaust backpressure, and probably some other factors.

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