Originally Posted by HVAC SuperTech
70-73 is PERFECT! I did mine and i was getting 40-50 stock, did the BB mod, and it shot to 125. took it back out and it sticks right around 60 now. I dunno how it did that. LOL
you should notice nice driveability, and it wont blow out your seals or anyhting.
Hey just a thought, I just discovered this with my 96 F250 after experiencing 95 PSI at Idle. I took off the FPR to clean it better and noticed that the plugger thingy behind the Spring doesn't slide in and out by itself. If I put it in and pushed it and turned the FPR upside down the Plugger never fell out on its own. And this was after cleaning with Carb Cleaner. So I took a small pick and scratched the the inside area better. Ten cleaned with cleaner and shop towel. Now the thing goes in and has much more range of motion and will slide in and out freely. I figure over time the residue caused the plugger to bind in the chamber and the spring wasn't doing much. It would take the Pump getting 95 PSI before it would move the plugger to allow the Fuel to move past it. As soon as I did that improvement I started seeing mid 40's at idle which I am very happy about now. Yes it may be a sign that I have a tired Fuel Pump (Lift Pump) but at least now I'm not always afraid of pop the Fuel lines. For cleaning on the truck I would recommend using Carb Cleaner and the eraser end of a new wood pencil and shop paper towel. Maybe even a nice pipe cleaner brush that is like 1/4" or larger.
Clean the spring also if it needs it.