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-   DIY Turbo Discussion (https://www.miataturbo.net/diy-turbo-discussion-14/)
-   -   Boost pressure vs air flow vs power (https://www.miataturbo.net/diy-turbo-discussion-14/boost-pressure-vs-air-flow-vs-power-79441/)

Tmorgan 06-13-2014 12:42 AM

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sixshooter 06-13-2014 06:50 AM

I'm really glad Tracey Morgan was able to join this discussion from his hospital bed. All the best on your recovery, bud.

Braineack 06-13-2014 07:41 AM


Originally Posted by chiods (Post 1139598)
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.

cyotani 06-13-2014 10:58 AM

It looks like this thread got derailed but Ill give my :2cents:

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.

JasonC SBB 06-13-2014 11:38 AM


Originally Posted by cyotani (Post 1139727)
It looks like this thread got derailed but Ill give my :2cents:

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.

cyotani 06-13-2014 01:12 PM


Originally Posted by JasonC SBB (Post 1139737)
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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