installed my exhaust
Originally Posted by heffergm
Ah, no, not really. Not unless you're running a manual boost controller, which is a bad idea. The ECU controls wastegate actuation and boost. If the ECU isn't tuned to deal with a free flowing exhaust, you're going to get boost creep and/or spike.
Most vehicles turbocharged today do not use the ECU to control the wastegate. CERTAINLY no aftermarket ones (like singled supras).
Boost creep and Boost spikes come from an inadequately-sized wastegate 95% of the time (usually because its a larger turbo running on a small internal wastegate). Using a free-flowing exhaust just heightens the effect: there's even more air flowing, so the wastegate size/airflow ratio is even more out of whack.
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