11-19-2002, 06:30 PM
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CC Member
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Join Date: Jun 2001
Location: Washington DC Metro (Virginia),
VA
Cobra Make, Engine: Classic Roadsters, Tweaked 351W, T-5Z, CRII Tech Support Team.
Posts: 1,895
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Not Ranked
Which manifold for a carb'd 351W? You have two choices, Edelbrock Performer RPM, and Wiand Stealth. I'm using the Ede, but I can't say that one would offer any advantages over the other.
Opinion. The Ede air gap would be a good 3 season intake, but miserable to live with in the winter as an daily driver.
Carb. Am using a Holley 700CFM double pumper (4778). Came with 69 primaries, and were way too rich for roller motor (CompCams retrofit hydraulic roller 224/224 - .533/.533) and roller rocker arms. Roller cam pulls 15" - 16" vacuum at idle. Running 64 primaries presently. 78 secondaries have been left untouched.
Getting idle mixture right has been an exercise in adjusting secondary idle opening, while positioning primary butterflys into proper location with primary transition slot. Have not resorted to drilling holes into primary butterflys...yet. Replaced secondary idle screw with Allen head setscrew that can be adjusted with engine running. Close, but no Cigar.
Contemplating replacing Holley with Demon 650 double pumper. Virtually all the published info I've seen lately use Demon carbs replacing the age old Holleys for better street (and track)performance.
Comments???
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