AAN Volumetric Efficiency

**prj** · 23 June 2010, 10:14

Originally posted by 20vQC

the peak is 86.7 but which is the value we must use to do the calcs?? the maximum? minimum? or the average? the average is about 71%

Since the RPM is in the formula, you can extrapolate all RPM points based on the data you have and use always the "correct" value for the RPM.

At least that is how I understand it.

**EspenW** · 23 June 2010, 11:47

Originally posted by Bram

I also noticed the highest peak power between 6000-6500 RPM on my standard cyl head with re-clocked ADU cams. I guess cams can help a bit but the flow of the head it self is the bottle neck right?

Remember that peak power will be measured at a higher rpm on an engine dyno than on a rolling road.

**Bram** · 24 June 2010, 09:08

Originally posted by EspenW

Remember that peak power will be measured at a higher rpm on an engine dyno than on a rolling road.

OK, I have only used my butt dyno to get this impression

**prj** · 24 June 2010, 15:23

Based on VE data from RWD and boost logs from 034 motorsport graphs:

Plotted on K24-7000 map:

Does that look correct?

AAN Volumetric Efficiency

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