PSI Blue printing

Anybody have a opinion on PSI blue printing? Is it worth the money? It for a screw blower.

 

Blueprinting?

Unless PSI does it, isn't it illegal to use in NHRA competition? The blowers are sealed upon leaving PSI, right?
-L

 

Larry,
PSI does do the "Blueprinting". It's a service option on new and used blowers. As for being worth it? Well, for what it's worth I haven't heard anybody saying it has made a HUGE difference in their program for the positive, yet.. Back to back with a "good" standard blower didn't seem to yield much difference. That being said, even if it made a world of difference, I don't think people would be too quick to shout it from the mountains. But if you could drive a truck through your current blower and had the blueprinting service done, it would probably seem like a magic bullet.