Daryl,

I did this from the start so I can't tell you how much impact it would have. However, I have plenty of pressure no need for any more.

My setup is a 1hp pump down ~650 feet and then ~250 feet lateraly to the pressure tank. All of this is 1" except at the filter housings. Which is 3/4" and then 3/4" to the pressure tank. The 3/4" line is only a couple of feet so I don't think it adds much to the drop.

Fred