Boost Fall Off

[240sx AutoXer]

I have a challenge for you guys. I first searched the forum for a thread regarding my issue. The short definition of my problem is boost fall off.First here is what I have installed:1990 Nissan 240SX HB (S13)Motor Modifications:SR20DET(Redtop)Factory S13 Turbo with Internal WastegateBlitz Blow Off Valve (Recirculated)Brian Crower Balanced Stroker Kit 86.5mm Bore 9:1 RatioBrian Crower Stage 3 CamsBrian Crower Springs and Titanium RetainersGreddy Rocker Arm StoppersARP Head StudsARP Main StudsARP Rod BoltsACL Race Main BearingsACL Race Rod BearingsACL Race Thrust BearingsNissan Red Top HeadExtrude Honed HeadNISMO Metal Head Gasket .5mm 87 BoreFreddy Intake Manifold (Smoothed Runners/Port Matched)Machine Shop 3 Angle Valve JobNissan Stock ValvesRC Engineering 750cc Top Feed Injectors SH4-750D Sat.SARD Fuel Rail Top Feed ConversionSARD Fuel Pressure Regulator Type-RJWalburo 255 Fuel PumpSummit Battery Relocation KitOptima Red Top BatteryAEM 30-1601 ECUGreddy PRofec B-SpecII Boost ControllerNissan Factory KA MAFKoyo SR20DET RadiatorFlex-a-Lite 220 Dual Electric Fans SAMCO Radiator LinesSAMCO Intake LinesMitsubishi EVO VIII Stock Intercooler(Custom Mounted) Megan Racing 2-1/2” Catback Exhaust (No Silencer)Nissan Factory Catalectic Convertor (Hollow)Royal Purple XRP 5W-20 Racing OilRoyal Purple “Purple Ice” Coolant AdditiveNGK Iridium Spark Plugs 23 gap My problem involves my boost coming up to whatever I set the value at in the EBC, but as soon as the value s obtained the boost drops off to 7-8psi and never rebuilds again. I have tried changing the settings in the EBC with no change other than my set max value always matches what I am asking for. I took the car to Church Automotive to have it dyne tuned and he had the same problem with the boost, so he installed a BootXS manual boost controller which obtained the max value of 15psi with the car building consistent boost pressure up to 15 psi at 7500rpm with no fall off. From this I think there is something wrong with my EBC. Any ideas I can try to troubleshoot the boost fall off? I am at a loss as to what it could be. I even removed the factory wastegate hose so it would stay closed and sure enough as the rpms came up so did the boost and I let off the throttle when the boost started to exceed 15 psi. Any help would be great. Joshua Fine

[240sx AutoXer]

Nobody wanted to touch this.I ended up figuring it out. I had my initial percentage set around 90% which was way to high. I lowered it down to 45% and now it is steady boost at 14psi with the stock T25 turbo.