Any seen an AFB with an AVS top???

[xLURKxDOGx]

This obviously doesn't look right and not entirely sure that it's a problem but I bought a 1967 Commando code 4305s that is a California carburetor. My question is what makes it a California carb and would the emissions have something to do with it being this way? It's in excellent condition and was a good deal just figured poke some more brains about it.

Thanks,

Jake

 

[rumblefish360]

That's just an early style AFB carb and not a mismatch of parts. It may even have the smaller neck size. Not the normally size were used to having. Mr. Gasket makes annadapter for it to use with normal air cleaners.

An old friend of mine had a '67 Chrysler Imperial, 440 cid engine with that very carb on top.

Most people do not beileve that a 440 came with the smaller 625 AFB back in the day. They always say no way, 440's only came with a 750.
NOT TRUE!

And yes I do realize that the carb has the 3 step AVS covers.

 

[383Scampman]

You are aware that the choke thermostat is missing ? check the throttle bore diameter to see if has been altered

 

[xLURKxDOGx]

You are aware that the choke thermostat is missing ? check the throttle bore diameter to see if has been altered

The bore sizes are 1 9/16 and 1 7/16.

Jake

 

[65Val]

You are aware that the choke thermostat is missing ? check the throttle bore diameter to see if has been altered

These carbs used a divorced choke thermostat located in the intake manifold, so no choke thermo on the side of the carb.

 

[65Val]

That's just an early style AFB carb and not a mismatch of parts. It may even have the smaller neck size. Not the normally size were used to having. Mr. Gasket makes annadapter for it to use with normal air cleaners.

An old friend of mine had a '67 Chrysler Imperial, 440 cid engine with that very carb on top.

Most people do not beileve that a 440 came with the smaller 625 AFB back in the day. They always say no way, 440's only came with a 750.
NOT TRUE!

And yes I do realize that the carb has the 3 step AVS covers.

Yup...the "lo-po" 440's (Chryslers, Imperials)came with the smaller AFB....the "Hi-PO" 440's (Charger, Coronet RT, GTX) came with the 750 AFB.

 

[65Val]

This obviously doesn't look right and not entirely sure that it's a problem but I bought a 1967 Commando code 4305s that is a California carburetor. My question is what makes it a California carb and would the emissions have something to do with it being this way? It's in excellent condition and was a good deal just figured poke some more brains about it.

Thanks,

Jake

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Is it an actual 4305 base?. If it is, then someone has drilled the extra mounting holes to use it on a newer manifold (wider "Holley" pattern).

 

[RustyRatRod]

The AVS has the secondary air door on top, not underneath the boosters.

 

[rumblefish360]

And the early AFB carbs had no weighted secondary door.

 

[xLURKxDOGx]

Is it an actual 4305 base?. If it is, then someone has drilled the extra mounting holes to use it on a newer manifold (wider "Holley" pattern).

Yeah, it's the 4305 base. I didn't notice those holes either. Thanks!

 

[Spider Williams]

And the early AFB carbs had no weighted secondary door.

Actually the 273 HiPo AFB and the Max Wedge 3447S AFBs do have the weighted secondary doors or velocity valves as they were called. Also the '67 HiPo 440 used a AFB not a AVS. I believe Chrysler began using AVS carbs in '68.

 

[xLURKxDOGx]

Actually the 273 HiPo AFB and the Max Wedge 3447S AFBs do have the weighted secondary doors or velocity valves as they were called. Also the '67 HiPo 440 used a AFB not a AVS. I believe Chrysler began using AVS carbs in '68.

Thanks, it was my understanding that they starred in 68 as well. But just trying to make sense of this odd carb. Anyone have a 67 commando carb to compare? I've scoured the internet and can't find any pics.


Jake

 

[rumblefish360]

Actually the 273 HiPo AFB and the Max Wedge 3447S AFBs do have the weighted secondary doors or velocity valves as they were called. Also the '67 HiPo 440 used a AFB not a AVS. I believe Chrysler began using AVS carbs in '68.

I know, thanks, this is what I was getting at without specifically pegging the year, make, models or carb numbers.
Thanks for the exacting information.

I just remember my old buddy Bob G's '67 that had that carb. An AFB without a weighted secondary air door.

 

[Mopar Tim]

That carb looks like a 4BBl off a 273. To me nothing odd about it at all.

 

[4spdragtop]

Heres pics of my 67 273 Commando carb 4295S. Im currently rebuilding it. 2nd pic shows.weighted door you guys mentioned?

 

[Mopar Tim]

That is it. A tuning item BTW.

 

[4spdragtop]

A tuning item? I was wondering if you could grind it for less weight, easier to open?? (Not that I would)

That is it. A tuning item BTW.

 

[4spdragtop]

Here's specs Jake outta FSM

Thanks, it was my understanding that they starred in 68 as well. But just trying to make sense of this odd carb. Anyone have a 67 commando carb to compare? I've scoured the internet and can't find any pics.


Jake

 

[65Val]

A tuning item? I was wondering if you could grind it for less weight, easier to open?? (Not that I would)

Steve...yes you can, but if you grind too much, you can create a bog.

 

[xLURKxDOGx]

Heres pics of my 67 273 Commando carb 4295S. Im currently rebuilding it. 2nd pic shows.weighted door you guys mentioned?

View attachment 1715020074

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Steve, thanks for the pics. It looks like the top is the only thing that is different to me. I have plans to use this on my commando that is going into my 64 dart. Thanks to everybody for their helpful input.

Jake

 

["Dart67"]

Here's a clearer shot of the specs.

Herb

 

[4spdragtop]

Thanks Dar. Im just getting "familiar" with carbs so I don't see me grinding anytime soon but thanks!

Steve...yes you can, but if you grind too much, you can create a bog.

 

[4spdragtop]

Hey Jake are you able to post side pics of linkage and springs. I got mine messed up and yours looks like a nice complete carb.

Thanks
Steve

 

[xLURKxDOGx]

Hey Jake are you able to post side pics of linkage and springs. I got mine messed up and yours looks like a nice complete carb.

Thanks
Steve

Steve, here are a few pics.

 

[Mattax]

If you guys haven't seen the Chrysler Master Tech Pamphlets, they're worth mining for nuggets of info and reference photos.
Imperial Club has one of the more complete collections on-line.
Here's one on Carbs from '69
Finer Points of Four-Barrels (Session 262) from the Master Technician's Service Conference