I have a friend that tried a Moroso cool can years ago. He said when he packed it with ice, it would make his fuel pressure drop from 7 to around 3 psi. It still ran fine, but that bothered him so he removed the cool can.

I have never used a cool can, but have any of you seen this? It makes sense since the fuel is cooler and denser. Do you reset the regulator so the pressure is back up to normal or what?
They're one of those old school hot rod parts nobody uses anymore.