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Old May 5, 2006 | 04:46 PM
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Question when should a carb be rebuilt?

i have a 1975 f-250 camper special with a 460/c6 trans with a 4 bbl holly carb, when i bought the truck it came with the rebuild kit for the carb, i was told rebuilding the carb is very touchy, and i also dont know when its time to rebuild the carb. what problems will happen when a carb needs to be rebuilt?
 
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Old May 5, 2006 | 04:54 PM
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in the instruction sheet, it says the model is a 4160, what cfm is that? and is that good for a 460 motor? its a 4 bbl carb but the 2 in front are huge and the 2 in back are small
 
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Old May 5, 2006 | 05:36 PM
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i think i found it, its a douple pump street/strip carb, cool i have a pretty good carb then? right?
 
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Old May 7, 2006 | 01:17 AM
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The two in front are small and the two in back are huge...

A double pumper is not good on a heavy truck or street vehicle. Sell it and the kit and get yourself another carb.
 
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Old May 8, 2006 | 12:59 PM
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the carb was made 1975 do you think i could get anything for it? it works good, why do you say its not good for heavy trucks wont it give me alot of power with a 460?
 
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Old May 10, 2006 | 06:14 AM
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You will find with a Double pumper carb spreadbore or square bore, yours is a spread bore-two small holes & two large holes, you will go thru twice as much fuel than say a good square bore vacume secondry, as your 460ci has to work harder to pull the extra weight, go and buy a 670cfm Holley street or truck avenger carb and save yourself a heap in fuel bills , and you will still have tons of power. when Ford introduced the mighty 460ci motor they put 600cfm Holleys on them ! what does that tell you...Cheers- Jamie. P-S Big is not always best..
 
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Old May 10, 2006 | 05:49 PM
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i think that the holly carb is stock with the 460 i have in there, but im not sure, i know that the model # in the carb tune up book, matched up with a douple pumper but, i dont know the exact cfm, is there a way of finding out if i have 600 cfm? and if i do should i still buy a avenger?
 
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Old May 10, 2006 | 09:38 PM
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As far as i know Ford put 600cfm vacume secondry's squarebore carbs on the 460ci, but i could be wrong as i have seen the odd spreadbore manifold on a 460ci engine, maybe you have a 429ci manifold and carb as the 429ci and the 460ci manifolds are interchangeable, but im only guessing, with your spreadbore carb i think its a 650cfm double pumper, there should be numbers on the choke tower-look them up on the Holley wed site and they should say what CFM size it is.you only need to rebuild your carb when it plays up, a good simple clean for now is to go and buy 2 cans of carbi cleaner,remove carb from motor and spray all over , inside and out but leave carb in one peice-dont take apart, should look like new. if you are happy with your double pumper just keep it. Good luck. Jamie-AUSTRALIA
 
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Old May 10, 2006 | 11:55 PM
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when it plays up, a good simple clean for now is to go and buy 2 cans of carbi cleaner,remove carb from motor and spray all over , inside and out but leave carb in one peice-dont take apart, should look like new. Jamie-AUSTRALIA
well when i bought the truck it came with a borg warner complete tune up kit for the carb gaskets, tubes, valves,etc.... so what do you mean when it "plays up", i dont think ill be taking any parts of my carb though because i dont have a clue what im doing and the dirctions dont really show me
 
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Old May 11, 2006 | 04:49 PM
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Hello, i said only rebuild your carb when it plays up, e-g starts to leak around gaskets, a good simple clean is to remove carb from motor and spray at least 2 cans of carbi cleaner all over it- inside throats and over the carb body.... then it should look like new, Cheers. Jamie
 
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Old May 11, 2006 | 05:47 PM
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i know you said to rebulid my carb only when it plays up, but i dont understand fully what you mean by plays up, what do you mean?
 
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Old May 12, 2006 | 07:22 PM
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Hello 460way, Plays up is a Australian slang word meaning- Broken, not working properly.
Im sure you can understand that. Another Aussie slang saying is. ( its had the Dick- that means- its not worth repairing throw it away ! ) Good Luck, Cheers. Jamie, Australia.
 
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Old May 12, 2006 | 09:39 PM
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Hello 460way, my wife just pointed out to me - im sure you can understand that, i did not mean any harm in that wording, what i should of said was thats our understanting of the words- Cheers Jamie.
 
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Old May 12, 2006 | 10:59 PM
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sure, i can understand that, i just thought maybe play up meant that its still works just not correctly, and i woundnt know if it wasnt working correctly because it is a new truck for me and i dont know squit about cars
 
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Old May 12, 2006 | 11:04 PM
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ok heres a opinoin quistion, i have a 1975 f250 with a 460 c.i. with a 4bbl douple pumper carb, a c6 trans, a b&m shift kit, and 3.73 gears, it sounds awesome. but my truck is so heavy, i wont alot of speed out of my motor and i cant do it in my truck, so what vehicle could i put this set up in that is relatively cheap?
 
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