#47532, "RE: 10psi from a 14b too much?" In response to In response to 4 Apr-25-03 12:50 PM by MetalJim
>wouldnt the volume of air entering the cylinders actually matter?
It's pretty much the main reason why 5 psi is 5 psi. An engine only demands so much air. For arguments sake, let's say our engines demand 170 CFM @ 7000 rpm. Running 5 psi of boost compresses the air so it is more dense, but it doesn't change what the engine demands. The same volume of air is demanded by the engine, but it has more mass because it is compressed 5psi above atmosphere - effectively turning 170 CFM into 230 CFM. So as long as a turbo can give you 230 CFM @ 5psi - you should be able to run it at 5psi. For 10psi boost, the 170 CFM turns into 285 CFM. So as long as the turbo can give you 285 CFM @ 10psi - you should be able to run it at 10psi.
Bigger turbos can be more efficient compared to smaller turbos, putting out cooler air. Cooler air is better.
<EDIT> >In reality, youre pushing in 800cfm vs. 400cfm into the engine. This is not reality </EDIT>
