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Author
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Topic: 351C-4V & Holley 650 Dbl Pumper..Need Tunning Help Pls??
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MASTIFF
Journeyman Posts: 93
From: maumee, Ohio 43537
Registered: May 2001
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posted 05-07-2002 07:30 PM
   
I have a 351C-4V, Wieand Xcelerator Intake Manifold, Stock Heads, Stock Cam, and Stock duel exhaust and need some advice on Carb tunning. I have a 650 Dbl Pumper w/ mechinacal secondaries on it right now and would like advice on where to start with the settings. Shooters?
Jets?
Pump Cams?
Power Valve? I measured the Vaccume and it reads 14HG at idel. Anyone have a similar set up? Any help would be appreciated.
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capri man
Gearhead Posts: 3385
From: doerun, ga.
Registered: Nov 2000
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posted 05-07-2002 07:39 PM
Shooters? 35
Jets? 70/78
Pump Cams?
Power Valve? 6.5
come on guys tell me haw far off i am. i dont have a clue on the pump cam.------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
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70coupe
Gearhead Posts: 357
From: Toronto,Ontario,Canada
Registered: Aug 2000
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posted 05-07-2002 07:47 PM
I would go with the pink cam in the second position. As for squirters, I had good luck with 35 or 37 primary and 31 secondary.
Now if I could just figure out these fancy HP carbs with the air bleeds!![This message has been edited by 70coupe (edited 05-07-2002).]
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blown 351
Journeyman Posts: 64
From: Seattle, Wa. 98258
Registered: Dec 2001
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posted 05-08-2002 03:21 PM
Shooters: try 31 primary and 28 seconday first
Jets: 68 primary 72 secondary
Pump cams: green primary pink seconday
Power valve: try the 6.5 and see how the midrange acceleration is. If it hesitates from part power to WOT maybe go with a 7.0
14"Hg is a decent amount of vacuum idle.
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MASTIFF
Journeyman Posts: 93
From: maumee, Ohio 43537
Registered: May 2001
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posted 05-08-2002 04:47 PM
I guess I can start with Blown 351 Settings and work my way up to capriman and coupes settings if need be. Thanks for the input. If anyone else has imput go for it.....I'm just tying to get this thing down.
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MASTIFF
Journeyman Posts: 93
From: maumee, Ohio 43537
Registered: May 2001
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posted 05-08-2002 05:28 PM
One more question....Should I be using the 50cc accelerator pumps?
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jkilroy
Gearhead Posts: 1719
From: Vicksburg, MS
Registered: Dec 99
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posted 05-08-2002 05:39 PM
The air bleeds are fantastic. Basically an air bleed is a controlled leak of air into the fuel stream that is headed for the booster and has already been through the main jet. Air enters though the air bleed orifice and mixes with the fuel through the emulsifier tubes. It allows you to alter the high rpm mixture, in each venturi, without affecting the other. You want to richen up your high RPM mixture, put in a SMALLER bleed jet, you want to lean it out, put in a BIGGER bleed jet.
------------------
Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"
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MASTIFF
Journeyman Posts: 93
From: maumee, Ohio 43537
Registered: May 2001
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posted 05-08-2002 05:48 PM
This is an old 4150 model. It doesnt have air bleeds I believe. Your response is intresting though. 
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