CFM vs. PSI
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Rotary Enthusiast
Joined: Mar 2004
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From: springfield MO
CFM vs. PSI
ok correct me if im wrong!
If you have two turbos one thats small and one thats big and you put them on two different cars with the same motors and the small one is pushing, say 15psi and the larger one is pushing 10psi but moving more air (cfm) woulnt the power equal out to be about the same on both cars or im i just drunk?
If you have two turbos one thats small and one thats big and you put them on two different cars with the same motors and the small one is pushing, say 15psi and the larger one is pushing 10psi but moving more air (cfm) woulnt the power equal out to be about the same on both cars or im i just drunk?
WWFSMD
Joined: Jun 2001
Posts: 5,035
Likes: 4
From: SoCal
It may work out to be about the same.
The amount of air (oxygen) an engine uses (and thus the power it makes) depends on the density (pressure + temp) and the flow (CFM). A big turbo delivers more air (oxygen) because it tends to heat the air less at high boost + high RPM and it also reduces the backpressure on the exhaust side which will increase flow through the engine for a given manifold boost level.
-Max
The amount of air (oxygen) an engine uses (and thus the power it makes) depends on the density (pressure + temp) and the flow (CFM). A big turbo delivers more air (oxygen) because it tends to heat the air less at high boost + high RPM and it also reduces the backpressure on the exhaust side which will increase flow through the engine for a given manifold boost level.
-Max
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