Don't 'T' anything that requires a fast response, like:
-blow off valve
-boost controller signal line input
-map sensor, electronics
-wastegate
it's ok to slow the responses of:
FPR, boost gauge, hobbs switch, very few things
If the fpr is a little behind thats fine, same with gauges. but if the bypass or map is behind the engine won't be tuned right and the compressor will surge waiting
also be aware one of the vacuum ports on sr20 is a 'transient source' it does not provide vacuum when the engine throttle blade is closed.
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