Dyno results - Tquad vs Holley vs Qjet - tuning issue, too rich

Recently finished a dyno session on a 482 stroker using a Holley 950 HP ultra, Ken Manley prepped 850 Tquad, and an Everyday Performance prepped 800 Qjet. The big holley gave best results, 595 hp and 622 ft-lb at peak. The Qjet was not far behind, 586/603. The Tquad made 572/597, with a significant calibration issue.

We could not get the Tquad lean enough at WOT. AFRs were below the 10:1 equipment limit, the motor would drown and stumble from the fuel, BSFCs were high, and fuel flow rate was at 286 lb/hr, up from 239 with the QJ. We are pulling over 2" of vac at 6000 rpm, so its somewhat air starved but making decent power.

The sec air door was fully open @ .940", sec butterflies open to 90 deg, leanest sec jets I had at the time of .131, primaries at .095 with 2002 rod, secondary hi speed air bleed opened to 0.041, idle fuel feed at .039, idle air bypass restriction at .043, idle air bleed left alone, primary hi speed air bleed left alone at .080", squirters enlarged. Idle and low speed are great, with a 236/244 cam on 113 LSA. Spring is clipped.

I have since acquired a set of .125 sec jets, and modified a surplus set to accept some screw in primary jets. I have a strip kit.

In addition, I plan to enlarge the primary venturi in the bowl to 1-3/8", and leave the double boosters.

This carb shows promise with decent numbers even though its pig rich. Anyone else run into this?