Here is a formula 80 CID *
RPM/1728. Example for 6000 rpm, 80*6000
rpm/1728 = 277.77 Cubic Feet of air per minute.
A cubic foot of air (at sea
level standard day) is approx 0.076 lbm/cubic
foot so 277.77*0.076 = 21.11
lbm/min air mass at 6000 rpm . Just change the
rpm to what ever value you
want. Also note the weight of air of course
decreases with altitude so
277.77 CFM provides 21.11 lbm/minute at sea level but
less at altitude.
Note this assumes 100 % Volumetric
efficiency.
Ed Anderson
Oh; boy, now
you’ve done it. My beautiful intake scoop is already installed, and I
apparently designed it based on the wrong number.
You’re numbers
look right to me. I’ll have see if I can figure out what I
did.
Thanks.
Al
Your Welcome,
Al
Perhaps you used the correct number for the design and just had a brain fade
when you quoted the number for CFM - Hopefully?
Ed
Anderson