Fuel pressure dropping while driving and under acceleration to zero at idle runs 4 lb electric Blue

TT5.9mag said

Yes, but what you are interested in though, is the flow rate of whatever pump you are using AT the pressure you will be using it at, including whatever restriction is in the system. So I’d set up a flow test through all of your lines and regulator, without the carbs at the end, into a bucket with the reg set at your desired pressure.

Click to expand...

Ok thanks... I'm still getting ready to put that Mallory 250 in place of the holly blue fuel pumps. Unless there is a restriction somewhere that I don't know about by blocking off the return line from the regulator and putting a gauge on the inlet side of the regulator from the pump that should have showed me the full pressure of what pump I am using. I'm assuming it should be at least 14 PSI is what Holly said and by me putting the other spring in should have made it 19 PSI. It only went to 11 and took a while to get there. But I've already covered this. So I guess I'm kicking a dead horse and will try the Mallory 250