Ever since I put on my Driftmotion downpipe and 3" exhaust I've been having boost creep issues. In 1st-3rd it will stay at 7 psi but in 4th and 5th it will creep up to 12 psi or so and hit fuel cut. Is there anything I can do to fix it besides putting on a more restrictive exhaust?
Boost creep
- Thread starter jake8790
- Start date
That's fairly normal. You can check and see if your wastegate flapper is obstructed at all and opening all the way inside the pipe (put compressed air through the wastegate actuator and listen for it hitting the pipe). The other thing you can do is smoothing out the port, basically doing a minor port and polish job on the wastegate port itself to try and get a bit more flow through it.
radiod;1881101 said:
He was asking for a way to 'decrease' the boost, not increase. Only way to do that would be install the stock downpipe back or undo the wastegate flapper to try and avoid the creep til you go 550/lex afm.
IndigoMKII;1881183 said:
That's exactly what I was explaining. Boost creep is normally the wastegate not flowing enough. Port the wastegate, it flows more, you get less creep. This won't increase the boost, it will help minimize it creeping up under longer periods of heavy load.