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Old 06-10-2010, 11:56 AM
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Carb searching

I'm looking to purchase a new carb. I'm not sure which carb will best fit my needs, I was hoping someone could help. Currently I have a 440 engine (not the original engine) with a 4 bbl Carter AFB w/ electric choke - the intake is date coded 12.12.68 casting #2806178

The motor is stock, the car is a weekend cruiser, so I'm looking for a carb with decent gas milage, but has plenty of power.

I've been looking at some 750 Holley carbs, which I like, but I just don't know.
Old 06-10-2010, 11:57 AM
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Also, The car is an automatic.
Old 06-10-2010, 02:20 PM
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fish -

The 750's are a safe bet with a stock motor, with the double pumpers getting you "off the line" a little quicker than a vac secondary. A basic 4150 model is fine, but you can look at the ProForm series if you like.

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Old 06-10-2010, 03:26 PM
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a 750 will work but the 440 will be over carbed. 600 would be better and get you off the line faster.
Old 06-10-2010, 06:16 PM
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And everyone tells me with my Holley 650 Double pumper I don't have enough carb
Old 06-10-2010, 09:37 PM
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Originally Posted by blue 68 gts
And everyone tells me with my Holley 650 Double pumper I don't have enough carb
yeah everyone like to overcarb an engine.. ive seen 500 cfm on feverfour cars!
Old 06-11-2010, 04:13 AM
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Well, I may have found a carb I'm interested in. 510-80555C Holley 650 cfm. Which costs a bit more than I'd like ($386), anyways, would it be better to rebuilt the existing Carter carb or just buy a new one? How much does it cost to rebuild a carb (parts & labor)?
Old 06-11-2010, 10:35 AM
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its een a wile since i rebuilt one but its not that expensive. i want to say $60.. and labor is free if you do it your self.. theres not many parts in the afb pretty easy job.
Old 06-11-2010, 03:54 PM
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well remember now, that from the factory, 440's originally got 800's
Old 06-11-2010, 05:29 PM
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My son and I just rebuilt our Carter AFB 9606 (605 cfm) the kit was $28 and took us about 3-4 hours. In comparison to a $350 new carb, I would say it would certainly be worth trying first.

I was not hard, I can't say we did everything right but we just followed the directions that came with it.

The best part about it was we learned a little bit about the carb and how it works. Shoot I would give it a try!

Joe.
Old 06-11-2010, 11:29 PM
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Originally Posted by 67 GTX
well remember now, that from the factory, 440's originally got 800's
800's? 625 was on my 440.. but mine was a 69 tnt crysler,, stock. drove 5 yrs then parked. 800 is somthing i didnt know even the factory over carbed!
Old 06-11-2010, 11:40 PM
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well gtx i googled it and yep 800 was the common on factory 440's 90%
Old 06-12-2010, 10:04 AM
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yep
then later on, 440's got thermoquad's, which were 850
i have an 800 on my car, and it runs great
not overcarbed
Old 06-12-2010, 10:26 AM
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Originally Posted by 67 GTX
yep
then later on, 440's got thermoquad's, which were 850
i have an 800 on my car, and it runs great
not overcarbed
vacuum secondaries
Old 06-12-2010, 06:12 PM
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Originally Posted by 1966sportfury
vacuum secondaries
ya
so?
Old 06-12-2010, 09:16 PM
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Originally Posted by 1966sportfury
vacuum secondaries
you got 800 cfm carb with vacuum secondaries it will only use what the needs. a 440 cannot use 800 cfm unless your pullin 8000 rpm
Old 06-13-2010, 01:37 PM
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Originally Posted by 1966sportfury
you got 800 cfm carb with vacuum secondaries it will only use what the needs. a 440 cannot use 800 cfm unless your pullin 8000 rpm
well, technically, i have air-valve secondaries
but, nvm
my 440 never bogs, and it doesn't have too much of a cam in it. It has been floored coming off the line, and no black smoke or bogging ever occurs
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