All Superflow flowbenches should flow within a few cfm of each other if they are calibrated...which mine is... regardless of altitude, temp, humidity etc....if your bench is calibrated I would suspect our results would be similar....I do this for personal satisfaction and am simply sharing my results as others have done.....I do not intend to be braggadocious or disrespectful to others.....I respect their efforts and results...obviously I wish that I would have some of the low lift flow numbers they have attained but I have not been able to quite reach them.....there is more to airflow than theory or all our ports.would be perfect and the same....I believe in letting the air tell me what it wants to do rather than vice versa.....perhaps I am wrong but that is where I have seen the greatest strides in improvement....