What are the differences between single stage to two stage air compressor

[KangBanger]

Like the title says, what are the differences and how i could tell by just looking at a compressor if it is single or two

Thanks in advance.

[KangBanger]

I am sorry i should have done more research out side of hondatech.

I found out that 2-stage compressor pumps twice in one cycle and single pumps once.

But how can i tell the difference? by just looking at a compressor.?

[Rustang]

http://www.hotrodders.com/forum/comp...age-81886.html