Let me clarify my test results:
Low deck 452 w-original stage 6 heads with mild porting, std port window(300cfm).
UD
[email protected] roller, 12.5cr.
Tested from 4700-7300.
Weiand TG4500 with non-HP 1150 carb-
556tq@4700
560tq@5000(peak)
650hp@6500(peak)
623hp@7300
Install port matched Weiand TR with 2 x 650DP Demon carbs-
585tq@4700
590tq@4800(peak)
676hp@6200(peak)
563hp@7300
Both combos were 639hp@6800.
After 6800 the TR combo just nosed over.
The single carb combo lost 45ft/lb from 6800-7300
The TR combo lost 88ft/lb from 6800-7300
Single carb combo continues to show increases in air flow all the way to 7300.
TR combo has air flow increasing to 6700, then shows slight drop in air flow from 6700 to 7300.
These are the results from consecutive pulls on the same day, about an hour and a half apart.