New/Old Compressor question

[Alex Blair (RIP)]

Originally Posted by cletrac

Alex, 11.5 cfm @ 90 psi won't run a sandblaster. I have trouble imagining that small an electric motor putting out 7 hp too. One of those heavy 5 hp electrics will run a 20 cfm compressor with no problem but you need a fairly small nozzle in the blaster for it to keep up. I have a 7.5 hp electric on a 35 cfm V4 unit that keeps up with no problem, but one of this size is $3000 at Princess Auto.
An 8 or 10 hp gas engine will replace a 5 hp electric motor and should run almost any normal two cylinder compressor.

You are right..I was looking at the horse power requirements rather than the CFM requirements..if he is using the old compressor..an intercooler between compressor stages,I assume the old compressor is two stage(One big piston,1st stage,..one little piston,2nd stage)
And an intercooler between tanks should keep the final air quite dry..Don't forget to pipe your product air(Intake)to a clean source of supply..away from the contaminated area..