This is a good thread.
I think the question(s) were actually answered early on. If you go back and re-read it, you will see it. (norbs and GNSCOTTS first posts)
But is the question "is the GTQ better then the BB", or "should I upgrade to the GTQ"?
It all depends on the combo and application, right?
What was the original question(s)?
1. "Who DID Actually Pick Up WIth a GTQ?"
2. is "the GTQ ' the better choice over a 72BB"?
3. is "the GTQ 'a' better choice over a 72BB for my application"
4. is "the GTQ ' really worth the alleged 100-200hp over a standard Q-trim turbo"? ((Is this a typo? Should it be 10-20?))
5. "spooling manners on the street is basically a non-issue".
Just something to think about:
What if I was to order four identical turbos, turbo "X". Two from Limit and two from PTE. Same exhuast hosing, wheel, fin design, etc, etc, whatever.
Would it not be possible / probable that when I tested these four turbos, the difference in ET and MPH could be off by ??? 5%? or 10%? 25%???
Would I, could I, should I not "tune" before and after each 1/4 mile run?
What if I tested the four turbos on two or three identical cars? What if the temp was the same, but the humidity was different? What if I changed the oil or spark plugs or cleaned my air filter?
What if I gave my car with a BB turbo to Ken Dutweiler and Laz for one week and they run a 9.88?
And what if I took the BB turbo off, put on a GTQ turbo, and I gave my car to Red Armstrong and Cal Hartline for one week and they run a 10.10?
It seems that most / all people that switch to a GTQ are very happy with it. I would think that if someone switches to a GTQ, and they see a big gain, they are not going to go back to the BB turbo and tune like hell to see if they can get the same or better results.