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      05-04-2013, 06:38 AM   #43
CanAutM3
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Quote:
Originally Posted by Inge_F View Post
You have to excuse my language skills, Volumetric efficiency was what I ment when I said "filling grade". Best VE are measured at torque peak, not power peak. S54B32 has a best VE of 106% in the standard E46 M3, and even higher in the CSL,(dont know the excact number here). Normaly VE will be a bit lower in V8s but as low as 80-85%?
You are correct, peak volumetric efficiency is reached at torque peak. I should have quoted 90-95% VE at torque peak instead of the 80-85% at power peak. It was a bit late at night when I posted...

Can you quote the source of the 106% VE for the S54B32? I am very surprised by this high number. Street cars with their intake and exhaust plumming, filters and catalytic converters have quite a lot of restrictions that hamper VE. There was another thread on the topic of VE, there were a lot of assumptions but not many hard facts.

Last edited by CanAutM3; 05-04-2013 at 07:13 AM..
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