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Old 02-08-2014, 10:11 PM   #152 (permalink)
RustyLugNut
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How did you calculate the CFM used in this situation?

Quote:
Originally Posted by GeorgeWiseman View Post
Again, this is a common misunderstanding. The fact is that the throttle plate has a lot less to do with VE that people intuitively think. See my previous post #129.

In the meantime, no one has to 'assume' any more. I've calculated the VE of this engine in these conditions.

Volumetric Efficiency calculator
Note that this calculator shows the Aveo's VE to be 79.999%
Givens: CFM=62.37, CID=97.64, RPM=2760
Your post #129 only made it clear to us that you are confused about the concepts of gas flow and compressibility. The links you give all do not support your position. And the calculator is a simplistic crutch that assumes much. Since you are a science guru, why don't you do the calculation long hand starting with the air mass before the throttle plate and the air mass after? The important point you seem to miss is your lack of complete data needed to calculate. You cannot just pull the 62.37 CFM out of the air. That HAS to be a measured quantity.
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