So im going to try to ask this question again and hopefully someone has an answer other than put a flex pump in it. I boosted my 4.8 and its running out of fuel a 5 lbs. I may as well jump to the 450 just to do it once. I know someone on here knew how to and i PMd him but he hasnt been on here in a while. Worse case scenario ill take the bucket apart and look at it as there are not that many nnbs 4.8s running around getting modified lol. BTW this is for the NNBS non flex fuel trucks. Thanks.

 

As long as the pump is pulse modulated it will be as simple as replacing the factory pump. I think there are only a couple pumps out there that are pulse modulated. The aeromotive 340lph is one of em

 

My 450 dropped right in my non flex fuel bucket

 

Awesome good to know. Does everything still work like it supposed to?

 

I'm in the same situation,still trying to figure out what fuel pump to run. Can't find much info about them, I'm shooting for 700hp but no idea what would support that power range.any ideas? Any info will help a lot.

 

Plenty of treads on the 450 lph fuel pump if your truck has the flex fuel pump but not much on the non flex trucks.

 

If I conver to the flex fuel pump I will be able to run the 450 lph pump? I'm order a conversion I just have to know if Ima be able to reach my 700ho goal with a returnless system