Your truck is probably Flex-Fuel. You don't need to upgrade the pump for 10 psi.

 

if the tuner suggested getting a 2 bar map then he is obviously wanting to ditch the MAF and go with a speed density tune which IMO is the way to go and how my truck is done. I also have the Seimens Deka 60s and if youre going to run those even on 10# i would go ahead and do an in tank walbro 255 just for safety, it may not be needed but why not go ahead and upgrade, theyre only 80-100 bucks new now for a kit and the install is fairly simple. If you dont mind me asking, who is doing the tuning? if you dont wanna post it up here shoot me a PM. The reason I ask is because of a wall I ran into with tuning issues when i put on my procharger setup that id hate to see anyone else have.

 

Does anyone know what the stock nnbs pump flows lph? I know it flows quite a bit more than the previous nbs pump.

 

my truck is not a flex fuel