...While not really TBI related I have a article somewhere where they dyno'ed the performer, RPM and torkerII all on the same engine. The RPM manifold pretty much beat or equaled the other 2 at all levels. It was kinda suprising to see that the RPM was as good as it was all around. Id had figured it would have less lowend than the perofrmer but it wasnt the case.
I remember tests like that too. I wonder if they only went down to 2500 or so on the dyno though? If that was the case, maybe they didn't quite catch any advantage that the Performer might have had.
Then again, maybe not.
I remember my Holley Z-series intake was an interesting one. The only thing Holley did to make it a "low rpm" torque builder was to add a crossover tube between the #4 and #8 cylinders on an otherwise single plane, divided plenum Street Dominator manifold.
Even though I was relatively happy with it, I never had any other aftermarket dual plane 4bbl intakes to compare it directly to.
Unfortunately too, the next engine will have more cam and cylinder head too, so I'll never really have a good back-to-back comparison.
Wish I had not sold it with my engine though. Would have been great to have it as an experiment between a Performer.
Paul