Edelbrock AVS2 650 vs Holley 600 Vac Sec (1850) - Track Shootout

[icetech]

Well pewp.... now not sure what to do... i hate that a holley is 200-400 more.. and also figuring which to go with since they have 50 models

Might watch marketplace for a good deal on a used one.

 

[Geoff 2]

For reasons known only to Edel, they supplied tiny 0.093" n/seats in their 750/800 cfm carbs. Not enough fuel for bigger engines. The original Comp Series 625 Carter AFB came with 0.101" n/seats.

 

[Orig69]

OK so here's another question and a possible explanation for the poor showing from the AVS2, but I'm not sure.
I have the 700 double pumper on now and it feels so much stronger, especially from idle. I'm running MVA and it just powers away with a touch of the throttle. It honestly feels so much stronger it's not funny.
When I got the AVS2 the PCV hose connects to the front of the carb, not the rear like the Holleys. My hose was too short so I got a longer piece of hose. I just grabbed some radiator overflow hose I had, quite weak walled, but it worked OK. When I swapped in the Holley on the weekend I used that same longer hose as I was rushing to finish the swap. As soon as I started the car the vacuum was sucking the hose flat and the idle was irratic. I swapped a shorter, more rigid walled hose in and all was fine. But the hose was never sucked flat by the AVS2. WHY? Could that port on the front of the carb be blocked or partially blocked somehow? I haven't had time to check but if that was the case would it cause poor performance?
I know the annular boosters were partially blocked when I first got the carb - maybe I got a Friday afternoon carb?
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Have you tried to plug the PCV vacuum port at the carb just to see if that makes a difference.