Calculating Injector Flow Rates
 

So I took the injectors out of my jspec today to get cleaned. I wanted them to be in semi-fresh shape, before I had my haltech tuned. The guy called me when he was done cleaning them. He told me he did two 2 hour cleaning cycles and had some bad news. He said the flow rates were all over the place. He wrote down what they were, but I didn't really understand. These are stock 550cc injectors...

81cc
84cc
89cc
93cc

2400 ERPM
50 PSI
6 Miliseconds
30 Seconds

Is this bad or good? I've seen mazda injectors flow sometimes more than advertised.