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Boost pressure vs air flow vs power

Old 06-13-2014, 12:42 AM
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Attached Thumbnails Boost pressure vs air flow vs power-a873893c380a7bc4163a6c208edfb2d1bd30ae615c587f08b8760e34d386ffd6.jpg  
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Old 06-13-2014, 06:50 AM
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I'm really glad Tracey Morgan was able to join this discussion from his hospital bed. All the best on your recovery, bud.
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Old 06-13-2014, 07:41 AM
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Originally Posted by chiods View Post
Someone explain to me why this thread isnt laughable but maximum boost is
Chapter 3 - Selecting The Turbocharger -- Selecting Compressor Size; I obviously read it.

Who said Maximum Boost is laughable?

Suggesting that two entirely different turbos, all things being equal, will always produce the same power at any given boost pressure is what's laughable.
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Old 06-13-2014, 10:58 AM
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It looks like this thread got derailed but Ill give my

When it comes to power what your really interested in is air density. Your engine always displaces the same volume per 2 revolutions (1.6 or 1.8L). So your always taking in the same volume throughout the RPM range. What changes is air density which allows for more oxygen molecules per volume of air which in turn allows more fuel and more power. Pressure and temperature are the two things that affect air density the most. Hence the turbo charges and intercoolers.
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Old 06-13-2014, 11:38 AM
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Originally Posted by cyotani View Post
It looks like this thread got derailed but Ill give my

When it comes to power what your really interested in is air density. Your engine always displaces the same volume per 2 revolutions
WRONG. You missed volumetric efficiency, which changes with exhaust backpressure. Bigger turbos tend to have lower backpressure.
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Old 06-13-2014, 01:12 PM
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Originally Posted by JasonC SBB View Post
WRONG. You missed volumetric efficiency, which changes with exhaust backpressure. Bigger turbos tend to have lower backpressure.

touché, I did miss that.
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