What is the maximum boost pressure for a stock 3rd Gen w/ Cummins +600 series

[rjohnson916]

Hey guys I’m scheduled to pick/up my swapped out Edge-Juice Attitude for a glitch issue, this will be my 2nd Edge BTW. Anyhow I am aware that the box doesn’t mess with turbo pressure, but I swear when the box was on I could hit & maintain 30+ psi at (wot) = wide open throttle. I’ve noticed ever since I removed my Edge programmer unit, and been driving around stock. Also keep in mind I have analog pillar mounted gauges too. If I mash the throttle to the floor, the Boost gauge will shoot past 30 psi to almost 35 ish then settle at 26 psi and will not go higher unless I repeat the aforementioned throttle situation? I don’t know why I remember the truck being able to hold 35 psi, but I could be just imagining things, I guess I’m not that perceptive. Anyhow does anyone know what the computer limits boost pressure to on a stock setting? Or do I have a problem someplace, and my factory plumbing aint holding more than 26 psi. As an FYI I have a plastic “limited Edition” intercooler, but it doesn’t look like it’s busted or leaking. Thanks in advance.



-Ryan

 

[thejeepdude]

It's normal to see it spike past 'peak' for a moment then then drop a few psi and hold steady. On my '05, it used to spike to about 32psi then settle in about 28-29 psi if I was towing up a hill and had it mashed. Ever since the latest flash, it will spike to about 34psi and settle in right at 30. It seems the new flash must have added a little fueling or at least raised the wastegate threshhold. You have the slightly lower rated motor in stock form so I would say your numbers are right inline with mine.