What size pvc? - pipe length and ID

[mulemotors]

I was wondering what effect the ID size of the pvc has on the flow bench. I understand it changes cubic feet measurement, but what else? Also what advantage is there to having long strait runs of pipe, and is there an ideal length.

Thanks

[RRBD]

If you go and read through the old posts, you'll get most of your questions answered.Dont' sweat it, I need to be reminded to look back through the old stuff sometimes as well.......Its all dependant on what ranges(cfm/depression) you want to test at, as to what diameter your flow element needs to be. Briggs=smaller, Big Block Chev=larger

Scott