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**Captainfab** · 08-09-2011, 11:34 PM

You have your power valves backwards. The higher hg power valve should be on the primary side. The stock setup for a 3310-1 is primary jets #72's, secondary jets #76's. Primary PV is a 10.5 and the secondary PV is a 8.5

At the very least, I would switch your power valves around and see if that helps. I have the same carb on a 454 that pulls 11-12 hg at idle. I have a 9.5 PV on the primary side, but I don't remember what is in the secondary side.

08-09-2011, 11:34 PM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,254	Re: Holley question You have your power valves backwards. The higher hg power valve should be on the primary side. The stock setup for a 3310-1 is primary jets #72's, secondary jets #76's. Primary PV is a 10.5 and the secondary PV is a 8.5 At the very least, I would switch your power valves around and see if that helps. I have the same carb on a 454 that pulls 11-12 hg at idle. I have a 9.5 PV on the primary side, but I don't remember what is in the secondary side. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE