Quote:
Originally Posted by 911st
I know most want to remove the throttle bypass valve as they think of it as a smog device.
I have noted this before but it also helps minimize turbo stall between shifts in a way similar to the compressor bypass valve dose.
This helps keep boost up between shifts and makes things easer on the turbo shaft and bearings between shifts.
It also adds a little safety as if the CBV fails you will not be as likely to snap a turbo shaft.
The AAV is just a cold start feature.
If either are removed, yes, block them off and use clamps to prevent blow off.
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+1 it helps to keep boost up between shift
It also help to burn the gas which is delivered by the CIS between shift and decceleration .