This is the formula we use at work to work out air flow needs
Air flow (CFM) = Displacement (cubic inch) X RPM X VE
1728 CF
CYCLE FACTOR (CF)
CF: 4 cycle diesel/petrol engine = 2
CF: 2 " " " " = 1
VOLUMETRIC EFFICIENCY (VE)
Naturally aspirated diesel/petrol engine = 0.85
Supercharged engine = 1.2
Turbo engine (we use this on for diesels) = 1.4
Eg Airflow = 109 x 6000 X 0.85
1728 2
= 555900
3456
= 160.85 cfm (this suits a 1800cc engine)
Litres to CI
1 LT = 60.5 CI eg 1.8 lt X 60.5 = 108.9 CI
>>>>
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of brad
Sent: Wednesday, 6 September 2000 12:57 PM
To: [EMAIL PROTECTED]
Subject: airflow calculations
does any 1 know the formula for calculating the cfm of a pipe
thanx in advance
Brad
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Kevin Harlan
WILDKAT SPARES
898 STUART HIGHWAY
BERRIMAH NT 0828
PO BOX 325
BERRIMAH NT 0828
Ph: 08 8932 5544
Fax: 08 8932 5788
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