...what should I look for? I am thinking about using my stock heads off my 89 GT and see how good I am at this. I figure flow should continue to gain in flow. Shouldn't I be able to convert back to 28" to make sure that the numbers are still increase?

thanks
Jeremy

 

if its a SuperFlow Bench then there is another small secondary Conversion Factor to apply to get a little better conversion accuracy.

the "normal Conversion Factor" is =>

Conversion Factor = ( New_FlowPress / Old_FlowPress ) ^ .5

1.133893 = ( 36" / 28" ) ^ .5

New_Flow_CFM = Old_Flow_CFM * Conversion_Factor

340.168 CFM = 300 CFM * 1.133893

for a little more accuracy you would multiply another small
Test Pressure conversion Intake or Exhaust Flow factor found in the SuperFlow Manual.