Trying to decide on easist, least finicky carburetor for the '68 383 im putting in my 66 fury. At this point, engine in stock. going with a performer intake . I found a guy that has the two carburetors city take $15 a piece for them. Looked up the numbers, and it looks like they are both 600 CFM. 1 what is the difference in these? 2 is 600 cfm enough for my 383 4 any other advice is appreciated.
Joined: Tue Oct 11 2005, 01:33AM
Location: Calgary, Alberta
Posts: 5893
The 1405 is a newer version of the 9605, but basically they are both the same carb. A standard 383 or 440 will run very well with a 600 cfm carb. My 440 started out with a 750 cfm and really didn't run run well, swapped it for a 600 cfm and it's much better now.
At $15 I'd buy them both. Depending on your intake you may need to buy a Mopar adapter kit for the linkage.
These are both manual choke carbs. I put an electric choke on my car.
Joined: Tue Oct 11 2005, 01:33AM
Location: Calgary, Alberta
Posts: 5893
Generally you need to choke these engines when starting, especially in cool air temperatures. A manual choke is usually connected to a pull cable with a knob attached to the lower edge of the dash. To start you pull on the choke which restricts air flow to the carb which results in a richer fuel mixture for starting. You need to develop a "feel" for how much choke to pull, too little and it may not start, too much and you risk flooding the engine. Once you get the engine started ou must remember to gradually reduce the amount of choke to keep the engine running without it running too rich. When I had a truck with a manual choke I would sometimes forget to remove the amount of choke and burned a lot gas as a result.
The electric choke is much better. To start, tap the gas to set the choke and drive away. As the engine warms the choke slowly opens so you never need to worry about forgetting it.
You can buy an electric choke conversion kit for the 1405 carb, about $65 or so.
Joined: Sat Mar 29 2008, 03:36PM
Location: North eastern Wis.
Posts: 1638
Sorry, no help in Identifying your carb.s I use factory carbs. Those Edelbrocks are basically copies of the old AFB or AVS carb.s I would recommend you contact Edlebroke. They can give you all the details for each.
What manifold are you using? Stock or aftermarket? Your manifold has to have the "pot" for an automatic choke. Older cars from the '60s didn't have electric chokes but did have an automatic choke that work the same as mentioned above, except the electric one pre-heated the choke spring. I think this allowed it to open sooner.
Myself I prefer the manual choke. You get used to how it functions rather quickly. Pull to close and open as needed.
Sorry, no help in Identifying your carb.s I use factory carbs. Those Edelbrokes are basically copies of the old AFB or AVS carb.s I would recommend you contact Edlebroke. They can give you all the details for each.
What manifold are you using? Stock or aftermarket? Your manifold has to have the "pot" for an automatic choke. Older cars from the '60s didn't have electric chokes but did have an automatic choke that work the same as mentioned above, except the electric one pre-heated the choke spring. I think this allowed it to open sooner.
Myself I prefer the manual choke. You get used to how it functions rather quickly. Pull to close and open as needed.
Thanks - im looking for an Edelbrock Performer. Ive found 2 one squarbore and one spreadbore. Can i use the squarebore carb w the spreadbore carb? The spreadbore intake is less $$$.
Joined: Thu May 01 2008, 11:15AM
Location: Chicago,IL
Posts: 2868
for $15 a piece, if they are complete and not broken you can make a few bucks on 1 and use the other. I've never gotten a carter to perform as well as a holley, but I have gotten better mpg and great street manners out of those 600's on 383's.
Joined: Sat Mar 29 2008, 03:36PM
Location: North eastern Wis.
Posts: 1638
Spread versus square bore depends on you manifold, although I would imagine you could get an adapter.... They must match the manifold. I have both Chrysler carb.s, the AFB is square bore, and the AVS is spread bore.
Joined: Sat Aug 19 2006, 05:03PM
Location: Ontario, Canada
Posts: 2919
bboogieart wrote ...
Spread versus square bore depends on you manifold, although I would imagine you could get an adapter.... They must match the manifold. I have both Chrysler carb.s, the AFB is square bore, and the AVS is spread bore.
AFB and AVS are both square bore. The main difference is that the AFB uses counterweights to control the opening of the secondaries, while the AVS uses a spring which is adjustable.
Joined: Sat Mar 29 2008, 03:36PM
Location: North eastern Wis.
Posts: 1638
Mike, Thanks for correcting me. I have one Carter AFB and it has mechanical secondaries. It is a '66 I was unaware of the square bore AVS. I have three sitting here. After looking at them, one is square bore with the small 1 1/2" bores. The other two are spread bore with the primaries at 1 1/2"s and the secondaries are 1 3/4"s. Must be different applications or maybe years. I wonder if any might no even be Mopar. Of course I'm looking at the Carters, so maybe it's an Edlbrock thing? Now I have to go clean 'em up and look for some numbers to figure out just what I have here. Once I get 'em clean, I'll some post pictures in a new thread.
