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Originally Posted by sp00ln
There is no way your boost would be limited by any sort of leak post-turbo. People take off their exhausts to gain better performance at the track (on a turbo car). Like I said, it either has to be a manifold problem or wastegate problem... or just a buggy-eye problem.
Check your wastegate - it could be malfunctioning and opening early. You could also check your boost controller itself - that could be off.
I've had my turbo/manifold gasket become vapor (it boke apart and nothing was left) before without having it effect my boost.
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Not totally true. If the wastegate efficiency were dramatically increased, as soon as the ECU opens the wastegate just a tiny bit, it might drop the boost dramatically, making the wastegate unable to properly regulate the boost. I'm not saying that's likely or my issue, but it is possible.
Also, taking off my exhaust would certainly *not* help my performance, unless melting wiring and setting the car on fire w/ 1000F exhaust gases blowing directly into the firewall/wiring harness is the new JDM way to go faster.
My boost controller is the stock ECU. I highly doubt the electrons in the ECU are broken... especially when my issues appeared just as my exhaust leak got louder.
The most likely culprit is that my header/up-pipe gasket has failed. I've had that happen before, and the result was the same loud exhaust and limited boost. Nothing that a quick trip to Litha and 10 minutes under the car won't fix.