The_Josh_Bear
Full Access Member
I didn't go back and read everything but these numbers are great. Like @Booyah45828 said the IP's are calibrated to 5psi on a bench, so real-world 6psi cruising is really good. 3psi as shown in the video example is not "normal" but it is common for the current aftermarket mechanical pumps. I got a Ford pump and it's much better at around 5psi average with a similar curve as yours. 7psi idle, 5-6psi cruising and 4psi WOT.Mine is about 7 at idle, about 6 when cruising at 60-70, and about 5 even when floored at 70mph, but getting no more speed out of it. So I'm at least 3psi higher than normal.
The idle/driving/WOT psi will also be lower if you have an open bleeder-style return tee'd into the fuel system than if not. I ran my not-stock fuel setup without a bleeder for a long while and then later added the OE style bleeder back into the return system and lost about 1psi at all times. 1psi isn't a big deal, 3-4 can be.
I reinstalled the return bleeder because if I forgot to swap tanks(when low on fuel) on my hill it would kill the engine on a very steep, twisty hill, often rainy and dark. But with the return bleeder if I forgot to switch tanks the engine will run long enough to slap the button and get fresh fuel without dying, since it's purging a ton of air instead of sending it through the IP.