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CFM of aircon compressers ?

General Tech Talk

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CFM of aircon compressers ?

Post by adam.s »

I am just trying to guage how an aircon compressor rates up against an electric air pump, does anyone know how much an OEM aircon compressor flows ?
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Post by Pharb »

Sanden SD508 about 4CFM per thousand revs assuming 80% efficiency of the swept volume (I think).

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Post by adam.s »

That really isn't much is it.

Are there purpose built engine driven compressers with a clutch that you can buy to do tyre filling duties ?
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Post by ZOOK60 »

id say 4cfm is good compare that too a 12v compressor. There is a pepose built engine comp called endless air
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Post by Screwy »

engine driven compressors, or converted A/C pumps put out a sh1t load more than most electric pumps....

the good thing about them is that u can just up the revs of the motor and it will pump quicker where as electric compressors run at the same pumping speed, depending on load, all the time.

if u can fit an engine driven compressor, they are definatly the go :D

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Post by MKPatrolGuy »

foad wrote:That really isn't much is it.

Are there purpose built engine driven compressers with a clutch that you can buy to do tyre filling duties ?


Yeah, but he said 4CFM per thousand revs, so as Screwy said up it to 2000rpm and theoretically you then get 8CFM...
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Post by ISUZUROVER »

MKPatrolGuy wrote:
foad wrote:That really isn't much is it.

Are there purpose built engine driven compressers with a clutch that you can buy to do tyre filling duties ?


Yeah, but he said 4CFM per thousand revs, so as Screwy said up it to 2000rpm and theoretically you then get 8CFM...


And the York compressors are a bit higher CFM than the Sanen 508 - from memory an extra 0.5/100rpm or something.
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Post by Woop »

Belt driven Truck airbrake compressors are capable of putting out about 8CFM continuously. But they need a constant oil supply/drain and the height can make them difficult to fit. You also need to install an electric clutch in place of the pulley as well.

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Post by grazza »

Would a truck compressor hanging off a PTO (like the Landie PTO) work?
I dont know if a PTO would produce enough RPM.

This raises another question, do any of the japanese PTO's have the ability to provide some sort of standard PTO fitting to drive various things, like a hydaulic pump?
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