750 carb.
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Joined: Apr 2002
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From: Bowling Green Ky
I live in bowling green, home of Holley. Over the last 21 years, I have run several different Holley's on my 79 351. A 750(3310), 600(4776) and a 600 part#(1850). All of them ran ok with a light tan reading on the plugs. But the (1850) is the overall best carb. It starts and idles the best and performs great all around.
Posting Legend
Joined: Sep 2001
Posts: 30,255
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A carb that is too big for the engine will be harder to tune, give poorer gas mileage, and cause other driveablity problems.
A good rule of thumb for a street engine is 1.5 x Cubic" = Max carb size CFM.
1.5 x 400 = 600 CFM.
A 600 CFM would be OK for a street engine or mildly built engine. Go slightly smaller for best economy on a street engine daily driver. A 750 would work on a well built motor used for drag racing or mud bogging etc.
A good rule of thumb for a street engine is 1.5 x Cubic" = Max carb size CFM.
1.5 x 400 = 600 CFM.
A 600 CFM would be OK for a street engine or mildly built engine. Go slightly smaller for best economy on a street engine daily driver. A 750 would work on a well built motor used for drag racing or mud bogging etc.
Senior User
Joined: Apr 2002
Posts: 133
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From: Bowling Green Ky
Most 750's will not run very well on a mild 351/400, but the #3310 will. The first carb I put on mine was a factory replacement for a clevland 4v 600 cfm. It ran fine , but did not make the enging perform like it should. The #3310 made it wake up. I still have it for a backup.
New User
Joined: Oct 2004
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As much as i hate to give away some of my secrets, here goes nuttin'. Ford 400 .030 over, a.k.a. 408. Comp 268dur @.494 lift dual plane intake (pick one) headers, dual 2 1/2" pipes, holley 80508-s 750cfm 4bbl, #64 main jets, red pump cam, (set correctly) vac secondary spring begins opening @1925rpm, full MSD ignition, 12 degrees of advance @800rpm idle (18inches of mercury@manifold port) with vacumm hooked up. Pulls like a turbine, gets awesome mileage! (for what it is) Again, I cannot stress enough the use of rich/lean guages in conjunction with a in-cab vacumm guage. Don't forget patience!!
Elder User
Joined: Oct 2004
Posts: 916
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From: Hazelton,BC Canada
im getting a 2brl 500cfm for 100 bucks....just for my stock 351..will it work ok on it
Last edited by crack; Dec 24, 2004 at 08:59 PM.
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