A shussssss sound

[kozakvod]

(05-10-2020 )tree98 Wrote:  Air inlet into the compressor sucking air in from a split hose or other break in the line ?? You're not losing boost at all ??

If it were a compressor issue it wouldn't matter any about engine rpm would it? Meaning when I'm into the pedal from a stop light changing gears.

As I shift through that noise is there. I do not notice it getting "louder" as RPM increases it seems to be same level, but let off the pedal, sound goes away. Get into the pedal again, sound is back.

Boost pressure loss? Haven't noticed any. I only see the boost PSI drop as the RPM/HP/Torque increase, but it seems to be holding power and boost very well. AND my MPG is good. Well, for a car hauler it's good. Example I mean by that is let's say I'm at 55 mph in 7H at 1600 and I shift to 8L and rpm drops to 1400/1450 or so. I bring the boost up to say 30 psi. As the rpm begins to increase the boost will start to coming back ever so slightly, maybe 5 psi, maybe.