Lb/min to cfm converstion
Mike M
Mike
nos-matt
compressor maps using psi instead of pressure ratio ?
Mike M wrote:
> What is the formula for changing Lb/min air to CFM air?
>
> Mike
--
visit my reef...
http://home.socal.rr.com/griffinsreef/reefpage.html
marriage is grand.............divorce is a hundred grand
- i have no f^%k%n idea...
nos-matt
oh, and at sea level, 1 bar is 14.7 psi
bar is the absolute lamest term for psi i have ever seen! btw
OF COURSE THIS IS AN OPINION, I DONT NEED ANY HELP FROM ANYONE
ABOUT SAID OPINION!
thanks!
see, what we need to know is, how much air(lbs) is in one cubic foot? @ atmospheric pressure of course...
ill look tonight and see if i can find it. i know my engine is going
to need 734 cfm to reach my goals.
GiJO
1bar = 14.5psi = 99.9kPa = 1.02kg.cm^2
hope this helps
Andy S
"nos-matt" <haha...@eatme-blowme.com> wrote in message
news:3A087F45...@eatme-blowme.com...
P.J.Berg
I have "Master Converter" but no go. And I shure as hell can't remember the
equation.
Find the volume of one-1 pound air, and take it from there.
J.
P.J.Berg
Berg...@Aircooled.net
"Mike M" <my...@NOSPAMhawaii.rr.com> wrote in message
news:ub_N5.16412$nY.7...@typhoon.hawaii.rr.com...
Mike M
Pressure ratio = (ambient pressure + boost psi) / ambient pressure
Simple enough. Ambient pressure at sea level is 14.7psi
"nos-matt" <haha...@eatme-blowme.com> wrote in message
news:3A087F45...@eatme-blowme.com...
> damned good question, i want to know as well! and whats with the
> compressor maps using psi instead of pressure ratio ?
>
> Mike M wrote:
>
RonR
Of course there are a few factors (there always is) as one is volumetric &
the other is mass (implied by volume of your cylinder). Anyhow the
conversion factor that I used was 0.0749 as a nominal conversion value.
(Lbs/min) / 0.0749 = CFM
Ron
Mike M <my...@NOSPAMhawaii.rr.com> wrote in message
news:ub_N5.16412$nY.7...@typhoon.hawaii.rr.com...
Marcel B
"nos-matt" <haha...@eatme-blowme.com> wrote in message news:3A08A84E...@eatme-blowme.com...
Mika Tamminen
deal with....
1bar =14.7 Psi at sea level= Ambient pressure.
1bar= 1 meter of water rise
How much is 14.7 psi compared to In/Hg??
14.7 inches??
Dunno but Sure can live with the much easier Metric system where everything
can be calculated also as the % table...
100% of boost for example ...or .1 bar is 10 cm...
Same can be used reversed on a flow bench and is used more accuratley too...
there too one can calculate more accurately by using Liters/min instead of
Cubic feet per minute. 1000 liters is one cubic meter...how much is 1000
gallons in Cubic feet or yards?
also a hundredth of a millimeter 0.01mm is .005 inches so you actully can
guess what difference it makes for example on measuring piston
clearances.....
I´m though used to use both as American engines here in Europe still have
their clerances given in inches we just get more scale to play with when we
convert the measurements and measure in metric units.
But still I have seen born americans scratch their heads with measurements
every now and then ..almosta impossible to do the same in a Metric system.
-just a machinists 2 cents.
"Mike M" <my...@NOSPAMhawaii.rr.com> kirjoitti viestissä
news:LV4O5.21917$DG1....@typhoon.hawaii.rr.com...
Mika Tamminen
different......as you know the area of fuel per weight then you also know
how much air is needed for the given mass of fuel in a given ratio. then add
those two together the area of fuel and air and voila.
"Mike M" <my...@NOSPAMhawaii.rr.com> kirjoitti viestissä
news:ub_N5.16412$nY.7...@typhoon.hawaii.rr.com...
Gary Derian
temperature of course. At sea level and 68ºF, air weighs 0.074 lbs/cu. ft.
--
Gary Derian <gde...@ameritech.net>
"Mike M" <my...@NOSPAMhawaii.rr.com> wrote in message
nos-matt
Mika Tamminen wrote:
> Pressure ratios and Psi´s or CFM are the most unfriendly terms one has tp
> deal with....
> 1bar =14.7 Psi at sea level= Ambient pressure.
> 1bar= 1 meter of water rise
> How much is 14.7 psi compared to In/Hg??
> 14.7 inches??
> Dunno but Sure can live with the much easier Metric system where everything
> can be calculated also as the % table...
> 100% of boost for example ...or .1 bar is 10 cm...
> Same can be used reversed on a flow bench and is used more accuratley too...
> there too one can calculate more accurately by using Liters/min instead of
> Cubic feet per minute. 1000 liters is one cubic meter...how much is 1000
> gallons in Cubic feet or yards?
> also a hundredth of a millimeter 0.01mm is .005 inches so you actully can
> guess what difference it makes for example on measuring piston
> clearances.....
>
> I´m though used to use both as American engines here in Europe still have
> their clerances given in inches we just get more scale to play with when we
> convert the measurements and measure in metric units.
> But still I have seen born americans scratch their heads with measurements
> every now and then ..almosta impossible to do the same in a Metric system.
>
> -just a machinists 2 cents.
>
> "Mike M" <my...@NOSPAMhawaii.rr.com> kirjoitti viestissä
> news:LV4O5.21917$DG1....@typhoon.hawaii.rr.com...
--
nos-matt
Gary Derian wrote:
> 1 cubic foot of air weighs about 0.068 lbs. It varies with pressure and
> temperature of course. At sea level and 68ºF, air weighs 0.074 lbs/cu. ft.
>
> --
> Gary Derian <gde...@ameritech.net>
>
> "Mike M" <my...@NOSPAMhawaii.rr.com> wrote in message
> news:ub_N5.16412$nY.7...@typhoon.hawaii.rr.com...
Ryan Jenkins
----------------------
Ryan Jenkins | jenk...@jmu.edu | AIM: Jester097
-SPOC Listmaster/Club Co-Head | www.saturnclub.com
- www.saturnclub.com/local-cgi-bin/ownersfull.cgi?Jester097
-SCCA SOLO II/DSP | www.saturnperformance.com
Ryan Jenkins
volume of air will change greatly with temperature, humidity, etc. if you
want i'll whip out the thermo book and do a basic conversion for you at
whatever temp and humidity.
-Ryan-
--
----------------------
Ryan Jenkins | jenk...@jmu.edu | AIM: Jester097
-SPOC Listmaster/Club Co-Head | www.saturnclub.com
- www.saturnclub.com/local-cgi-bin/ownersfull.cgi?Jester097
-SCCA SOLO II/DSP | www.saturnperformance.com
He who controls others may be powerful, but he who has
mastered himself is mightier still.
-Lau Tsu
----------------------
"nos-matt" <haha...@eatme-blowme.com> wrote in message
news:3A0980A1...@eatme-blowme.com...
nos-matt
equation which is temperature dependant, and elevation dependant as well.
Ryan Jenkins wrote:
> lb/min is not really going to give an accurate measure of cfm. the specific
> volume of air will change greatly with temperature, humidity, etc. if you
> want i'll whip out the thermo book and do a basic conversion for you at
> whatever temp and humidity.
>
> -Ryan-
>
> --
> ----------------------
> Ryan Jenkins | jenk...@jmu.edu | AIM: Jester097
> -SPOC Listmaster/Club Co-Head | www.saturnclub.com
> - www.saturnclub.com/local-cgi-bin/ownersfull.cgi?Jester097
> -SCCA SOLO II/DSP | www.saturnperformance.com
>
> He who controls others may be powerful, but he who has
> mastered himself is mightier still.
> -Lau Tsu
> ----------------------
> "nos-matt" <haha...@eatme-blowme.com> wrote in message
nos-matt
Ryan Jenkins wrote:
734cfm? good god... what kind of motor is it? -Ryan-
----------------------
Ryan Jenkins | jenk...@jmu.edu | AIM: Jester097
-SPOC Listmaster/Club Co-Head | www.saturnclub.com
- www.saturnclub.com/local-cgi-bin/ownersfull.cgi?Jester097
-SCCA SOLO II/DSP | www.saturnperformance.com----------------------"nos-matt" <haha...@eatme-blowme.com> wrote in message news:3A08A84E...@eatme-blowme.com...cubic feet per minute.
oh, and at sea level, 1 bar is 14.7 psibar is the absolute lamest term for psi i have ever seen! btw
OF COURSE THIS IS AN OPINION, I DONT NEED ANY HELP FROM ANYONE ABOUT SAID OPINION!
thanks!see, what we need to know is, how much air(lbs) is in one cubic foot? @ atmospheric pressure of course...
ill look tonight and see if i can find it. i know my engine is going to need 734 cfm to reach my goals.
--
Ryan Jenkins
--
Ryan Jenkins | jenk...@jmu.edu | AIM: Jester097
-SPOC Listmaster/Club Co-Head | www.saturnclub.com
- www.saturnclub.com/local-cgi-bin/ownersfull.cgi?Jester097
mastered himself is mightier still.
-Lau Tsu
----------------------
"nos-matt" <haha...@eatme-blowme.com> wrote in message news:3A09B541...@eatme-blowme.com...
its a small v8 engine, it should be easily attainable @ 1.82 pressure ratio with a .53 a/r 300zx compressor t-03. of course two :-)
Ryan Jenkins wrote:
734cfm? good god... what kind of motor is it? -Ryan-
----------------------
Ryan Jenkins | jenk...@jmu.edu | AIM: Jester097
-SPOC Listmaster/Club Co-Head | www.saturnclub.com
- www.saturnclub.com/local-cgi-bin/ownersfull.cgi?Jester097
-SCCA SOLO II/DSP | www.saturnperformance.com----------------------"nos-matt" <haha...@eatme-blowme.com> wrote in message news:3A08A84E...@eatme-blowme.com...cubic feet per minute.
oh, and at sea level, 1 bar is 14.7 psibar is the absolute lamest term for psi i have ever seen! btw
OF COURSE THIS IS AN OPINION, I DONT NEED ANY HELP FROM ANYONE ABOUT SAID OPINION!
thanks!see, what we need to know is, how much air(lbs) is in one cubic foot? @ atmospheric pressure of course...
ill look tonight and see if i can find it. i know my engine is going to need 734 cfm to reach my goals.
--
Ryan Jenkins
lb/min to cfm isnt quite so cut and dry.
--
----------------------
Ryan Jenkins | jenk...@jmu.edu | AIM: Jester097
-SPOC Listmaster/Club Co-Head | www.saturnclub.com
- www.saturnclub.com/local-cgi-bin/ownersfull.cgi?Jester097
-SCCA SOLO II/DSP | www.saturnperformance.com
He who controls others may be powerful, but he who has
mastered himself is mightier still.
-Lau Tsu
----------------------
"nos-matt" <haha...@eatme-blowme.com> wrote in message
news:3A09B4CA...@eatme-blowme.com...
> would not 1 bar be a dependant term as well? your factoring 14.7psi in the
> equation which is temperature dependant, and elevation dependant as well.
>
>
> Ryan Jenkins wrote:
>
> > lb/min is not really going to give an accurate measure of cfm. the
specific
> > volume of air will change greatly with temperature, humidity, etc. if
you
> > want i'll whip out the thermo book and do a basic conversion for you at
> > whatever temp and humidity.
> >
> > -Ryan-
> >
> > --
> > ----------------------
> > Ryan Jenkins | jenk...@jmu.edu | AIM: Jester097
> > -SPOC Listmaster/Club Co-Head | www.saturnclub.com
> > - www.saturnclub.com/local-cgi-bin/ownersfull.cgi?Jester097
> > -SCCA SOLO II/DSP | www.saturnperformance.com
> >
> > He who controls others may be powerful, but he who has
> > mastered himself is mightier still.
> > -Lau Tsu
> > ----------------------
> > "nos-matt" <haha...@eatme-blowme.com> wrote in message
Gary Derian
atmosphere is 1016 millibar or 101.6 bar. A Pascal (Pa) is 1 Newton per
square meter.
--
Gary Derian <gde...@ameritech.net>
haro...@gmail.com
> What is the formula for changing Lb/min air to CFM air?
>
> Mike
cfm = lbs/min x 13.3
or
lbs/min = cfm x 0.0751