What size carb
Postmaster
Joined: Apr 2000
Posts: 2,838
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From: SD
What size carb
[font color=red size=3]I agree, I wouldn't go over 600. I have a stock 390 with an Edelbrock 600cfm, and it does great. I would also suggest that you get an Edelbrock, they are easier to tune and are more 'street friendly' than a Holley. (in my opinion - of course)
Just a thought.
Marty
"Cleverly Disguised as a Resposible Adult"[/font]
Just a thought.
Marty
"Cleverly Disguised as a Resposible Adult"[/font]
Elder User
Joined: Aug 1999
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What size carb
I put an Edelbrock 600cfm on an Edelbrock 4v Performer 289 manifold, on my old 302. It was fine, but the motor got pulled. I put that same carb on my 390 where it's going to stay. Now I have another 302. For now I'm leaving the 2V on it because it is working well. If I pull that motor and clean it up, I may put the Edelbrock manifold on it, but I'm going to go w/ a smaller carb like a 500cfm next for the smallblock. BTW if you are shopping for Edelbrock type carbs, the Carter AFB is the same thing and they have a 625cfm size. I found a more dramatic improvement in my smallblock by haveing the distributor rebuilt/recurved than by putting 4V on it.
BBT
BBT
Post Fiend
Joined: Sep 2000
Posts: 8,238
Likes: 3
From: Oregon
What size carb
Boy, this type of question gets asked allot. When in doubt, put on a 850 Dominator double pumper (yes, that answer was for you John 
)
If your knuckles ain't bleeding you did something wrong.
'72 F-250 "Hi-Boy" 4x4, Dana 60/HD44, FE390 @ 400hp(purt near!), 4-speed, custom suspension w 4" lift, mud on black.
)If your knuckles ain't bleeding you did something wrong.
'72 F-250 "Hi-Boy" 4x4, Dana 60/HD44, FE390 @ 400hp(purt near!), 4-speed, custom suspension w 4" lift, mud on black.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
What size carb
Gotya Seth. :-)
John
jowilker
[link:www.ford-trucks.net/users/jowilker|Club FTE since 01 01]
[link:www.ford-trucks.net/users/jowilker/NCFTE.html|NC Truck Owners]
66F100s Rule
In the cool still quite of night you can hear chevies rusting away.
John
jowilker
[link:www.ford-trucks.net/users/jowilker|Club FTE since 01 01]
[link:www.ford-trucks.net/users/jowilker/NCFTE.html|NC Truck Owners]
66F100s Rule
In the cool still quite of night you can hear chevies rusting away.
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Senior User
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What size carb
According to the Holley book, your motor won't pull more then about 450 cfm so a 600cfm 4bbl is plenty big and a 500cfm 2bbl is to big (it will bog). Unless you plan on a HiPo rebuild, a Holley 390 cfm 4bbl would work great, good gas mileage and decent performance.
Been there. Done/tried that.
Been there. Done/tried that.
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Brett Foote
Freshman User
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What size carb
Or you can use my handy dandy free program I wrote.
http://www.radarscastle.com/cid2cfm.zip
Unzip it and run the setup :-)
I wrote it for myself while I'm studying VB.
Tim Smith
1969 F250 FE390 600CFM carb.
http://www.radarscastle.com/images/ford-tough.gif
http://www.radarscastle.com/cid2cfm.zip
Unzip it and run the setup :-)
I wrote it for myself while I'm studying VB.
Tim Smith
1969 F250 FE390 600CFM carb.
http://www.radarscastle.com/images/ford-tough.gif