Im set up to run 14 pounds of boost on stock turbos. I just replaced the heads,turbos,y-pipe and gutted the cats. I just got the car back yesterday so i have not pushed her hard at all. As i was coming home from the shop and getting on the interstate i gave it some gas and as boost began to build the car just nose dived i guess you could call it. The engine stuttered and acted like it just gave up. My first thought was over boost. My gauge was reading 25 (aftermarket pro-sport) pounds(dont even think 9b's can spike 25 lbs lol). I pulled over immediately and turned the mbc almost all the way down. as i was getting back on the highway i babied her up to speed. in 6th i tried again and same result. this time i heard a loud whistle under the hood. Any ideas... my first thought was a massive boost leak.
Oh i did replace some things this morning as well. i replaced the rear o-ring on the rear turbo pipe and the vac caps that were dry rotted. This killed the whistle but not stalling during boost
And 1 thing i did notice is i can ease into boost a little bit but not full throttle.
Things i have done to car when it went down.
fairly new 9b's from a jdm engine
vac reduction
y-pipe
gutted cats
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