276 stroker from 35 years of parts

[GB SISSON]

Originally Posted by flatjack9

On my pump test stand, I have a valve to shut off flow and test relief valve pressure. I restrict the flow to 40 psi back pressure and check flow rate. Typically 1.5 gpm.

Thanks for these details. Sounds perfect to me! Both pressure and volume. Tempted to use the worst one in the sump of my sioux valve surfacer as it's stock pump and a submersible electric pump that came with it are both inoperable.