Probally what happened was that the guy started flow testing the heads at 10" H2O and then about halfway through had to cut back to 7" or even 5" H2O in order to finish flow testing them.
So,,,,the conversion factor for 10" to 28" I already gave as being; X 1.67
The conversion factor for 7" to 28" is; X 2.00
The conversion factor for 5" to 28" is; X 2.37
Again my advice is check your paperwork that he gave you. If you don't understand the data that he gave you, then you have every RIGHT to CALL him and ask for an explaination. If you paid for a service and his answer/flow data is not explained to you, then he needs to clarify what he has written down on that flow sheet. In other words he needs to speak to you in "laymens terms". You do not need to be "guessing" about what your heads flow.
Hope this helps,
Charlie
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