First, before anyone gets their panties in a bunch, if you want a blow-off valve because you like the sound, go for it. But if you look at my posts, it has gnawed at me that people are not only adding BOVs, but also talking about "less lag in operation" and "better driveability". Now let's face it, there's always a placebo effect when someone spends money on their car and the butt dyno is highly suspect. So, I did some checking into mfgs anti-lag systems and BOVs and found the following Ford patent:
https://patents.justia.com/patent/9714620
It's very, very slick.
I also found another patent from Porsche which I won't detail here dealing with their "Dynamic Boost" system, which shares some of the same basic operations. So, let me distill it down for you. It operates basically the same way as I detailed in post #51 in this thread, including the EGR operation (valve timing) but also includes operation of the lockup converter which I hadn't considered. What this means is that the BOV is basically useless (other than for some sound). Not only that, but by using a BOV you're actually stealing a bit of turbine speed during full throttle shifts by adding one, thus defeating the purpose of the anti-lag programming. Now honestly, this probably doesn't even equate to a 1/10 in the quarter (for those interested in such things), but it should illustrate that adding a BOV to make your car faster- well it's a pointless expense. Unless of course your need for a bit of "whoosh" outweighs your efforts to put down the best times.