Lets all agree to disagree. Or, to each there own.
There is a lot of good points here for someone that wants to take the time to actually ready through it and make there own decision.
There are valid reasons for keeping or discard and it is not that hard to try one's car both ways.
I found a lot more opportunity to keep my compressor wheel spinning between shifts in the Compressor Bypass Valve but I believe keeping the Throttle Bypass Valve did contribute to my boost recovery between shifts. Further, my car had no issue with lazy rpm between shifts like my old 914 with a de-accel valve. Lastly when I had my set up I had no/nada drop in boost between sport shifts without having to do a speed shift (keeping foot on the gas with the shift).
To be or not to be. It is just a choice.
