Measuring VE

[John Dammeyer]

Hi,
To my understanding that's a good way to do it.  However,  if you are
planning on using a MAF sensor for the injection control the VE value is
somewhat redundant other than for information collection for manifild
construction and tuning.  It's really only needed for the MAP style
controllers if they aren't completely table driven.

Cheers,

John


> -----Original Message-----
> From: owner-diy_efi at diy-efi.org 
> [mailto:owner-diy_efi at diy-efi.org] On Behalf Of 
> gte861v at prism.gatech.edu
> Sent: Tuesday, July 10, 2001 12:01 PM
> To: diy_efi
> Subject: Measuring VE
> 
> 
> Would it be possible to measure the Volumetric Efficiency on 
> an engine using a 
> correctly calibrated MAF sensor?  I have been pondering this 
> idea.  I have an 
> engine dyno on which to do the measuring and a wind tunnel 
> and the appropriate 
> hardware to accurately calibrate a MAF sensor so why couldn't 
> I measue the VE 
> of the engine? All that I would have to do is at a certain 
> RPM measure the air 
> flow, calculate what it should be based on that displacement 
> at that RPM and do 
> the percentage.  Is there something I have forgotten or could 
> this be a 
> valuable way to accurately set my VE tables.  Thanks, 
> 
> 
> 
> Scott Flanagan
> GT Motorsports Powertrain Leader 
> www.me.gatech.edu/gtmotorsports/ Georgia > Institute of 
> Technology Mechanical Engineering Undergraduate
> 
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