Denzil,
Each throat of a 45 with 37mm choke fitted will flow 255 cfm.
Cheers
Feral Errol
----------
From: Denzil Palmer <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Re: Airflow calculations
Date: Friday, September 08, 2000 2:38
Errol,
SU's, what then would be the cfm of the 38's? Do you mean below that one 45
weber flows 510cfm from both chokes together?
----------
>From: "Errol Smith" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Subject: Re: Airflow calculations
>Date: Fri, 8 Sep 2000 9:29 AM
>
> Terry,
> For single carb:-
> 45mm weber with 37mm chokes = 510 cfm. Twins = 1020cfm
> 45mm weber with 40mm chokes = 560 cfm Twins = 1120cfm
> 48mm webers with 45 mm chokes are 600cfm Twins = 1200cfm
> Cheers
> Feral Errol
>
> ----------
> From: Terry & Heather <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: RE: Airflow calculations
> Date: Friday, September 08, 2000 2:25
>
> Kevin,
>
> very interesting post.
>
> I have just one question - carbies are rated at a certain cfm eg Holley
780
> cfm (from my Ford 351 days)
>
> How do you calculate the cfm rating of a carbie, sort of like a pipe I
> guess
> which is along the lines of the original question.
>
> What's the cfm rating of a DCOE45?
>
> Terry
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Kevin
> Sent: Thursday, 7 September 2000 10:33 AM
> To: [EMAIL PROTECTED]
> Subject: Airflow calculations
>
>
>
> 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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> WILDKAT SPARES
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