Well, if I`m at a stop and floor it the boost goes up tp 35psi and rpms are around 3k. If I`m on the highway going 70mph and floor it the boost pressure goes to 20, and slowly rises, 21, 22, 23 and thats it. I almost always have the edge set at stock, but the boost fooling is always on. I turned the edge on just to see if the boost would increase and it did not. Power feels ok, its just the boost is low unless I`m at 3k rpms. I could disconnect the edge from the mapp sensor to see what I get. I was thinking ithasa small leak, and when the rpms are high the turbo can overcome the leak, but when the rpms are lower with it floored the pressure can`t build past 22-23psi. Maybe I should disconnect the edge next. I`ve had it on so long,I don`t remember the factory boost pressure. Thanks again. Kevin
That's not too unusual, really. You have to look at what you're doing....
From a stop, the TC is unloacked and the motor spins up fast and the wastegate can't react as fast as the RPM's are coming up. So even on stock, you can see those numbers jump up into the 30-35 range and then settle back down.
On the highway, when the TC is locked and you're already making a bit of boost pressure, the waste gate has a little time to react and it's limited to around 26-27 psi in stock form.
Once the Edge is turned on, assuming you've manipulated the boost numbers, that is still not too unusual.
In order for the boost numbers to come up quick, the engine RPM has to come up quick from relatively low numbers on each.
From a stand still and up to about 45 or so, if I stand on it I'll bounce off the boost limiter pretty quick. I have mine set for 40 psi to defuel and the alarm goes off at 38 psi.
Now on the highway, unless I get deep into the throttle w/ the T/H mode OFF and the TC unlocks, my boost number don't climb much past the 30 mark.
You're probably just fine. I wouldn't say you have a leak. You'll notice a boost leak REAL FAST. They do not come on subtly. Where ever it happens, you get a VERY loud, POP......HISS!!!
Just ask a 6.0 Powerstroke owner, they are very familiar with that noise.