The Skinny on 4300 carbs?

[FrankBoss]

I am planning a new head for my 200 and part of the mods will be a 4v carb.
(Dont try to talk me out of the 4v Carb I have a plan)
the carb I'm looking for is a Autolite 4300 factory smallblock V8 carb with a square bore.

I dont have alot of information on the carb and I have ran one on several smaller motors like the 2.3L and the same carb on a 289. So I would like to try something differrent on my 3.3L.

My trusty carb had been dropped and very damaged while in storage. So I would like to find another Like it...

I havent the ID plate on the old carb in order to find its match so I'm looking for insite on IDing the right one... it would be a 470 cfm rating carb.
the shape of the carb and Location of the gas infeed. throttle and choke on this carb makes it Ideal for my addapter and Head. I Just am not versed in how to IDing the right one, other than the square bore. I know they made larger versions in a square bodr up too 600 cfm and I'm wanting to stay away from these due too them not suiting my needs.

I have a 500 holley one the car now and it works well, before that I have a holley webber. All the addapters and Gaskets I have built my self and had much fun doing so... and this 4v adapter is my winter project.

So any insite would be apperciated..I'm taking pics as I go and hope to post my swap in the spring....

Frank

 

[JackFish]

I had a Haynes Holley manual out from the library, it had a ton of info on carb #'s, plenty good info. You might want to check your library online.
The other place online I would ask is the Carbed Ford Forum:
http://www.carbdford.com/index.php?sid= ... 0069619555

 

[FrankBoss]

I have the Holley manual and didnt see this carb in the book at all....

I assume this is a carter built carb?

If anyone has one for sale cheap let me know.

Frank

 

[Geezer 300]

Autolite and Holley aren't the same carbs!

 

[xafalcongs]

I have the Holley manual and didnt see this carb in the book at all....

I assume this is a carter built carb?

If anyone has one for sale cheap let me know.

Frank

Frank,

Go to Pony Carbs web site. They specialize in rebuilding and restoring Autolite, Motorcraft, and Ford/Holley carbs. If they don't have a pic of the exacte carb you should be able to e-mail or call them and find out.

--J

 

[xctasy]

The 4300 Autolite is a brilliant carb that should never have been pensioned off. Its basically two 2100/2150 Autolites co-joined, or sort of an AFB Carter on the cheap carb. The 4300 is such a pretty, simple carb, part of Mustang history. The only issue will be packing it!

The reason for its demise was the arrival of the Quadrajet.

Ford used the Rochester Qjet on a bunch of FE 428's, and then Fords response was intially the 351c 4v C Autolite 4300G.

It too was a disaster, not because it didn't work well, but because it broke parts all the time.

The Carter Thermoquad was then used by Ford as a replacement on its Australian Cleveland 302's and 351's, and it too was a cold turkey. Breaking float bowels and throttle shafts.

 

[xafalcongs]

Ford used the Rochester Qjet on a bunch of FE 428's, and then Fords response was intially the 351c 4v C Autolite 4300G.

Hey xctasy,

I don't know of a single Q-jet application for the FE in North America. Ford US did use the Q-jet on the 429CJ. Also, some people mistake the Motorcraft 4350 spreadbore for a Q-jet. The 4350 was used on thousands of 460s during the 1970's.

--J

 

[JackFish]

Autolite and Holley aren't the same carbs!

Doh! Gotta learn to read better...

 

[xctasy]

Ford used the Rochester Qjet on a bunch of FE 428's, and then Fords response was intially the 351c 4v C Autolite 4300G.

Hey xctasy,

I don't know of a single Q-jet application for the FE in North America. Ford US did use the Q-jet on the 429CJ. Also, some people mistake the Motorcraft 4350 spreadbore for a Q-jet. The 4350 was used on thousands of 460s during the 1970's.

--J

Doh! Gotta learn to read better...

Thanks!

 

[FrankBoss]

looks like I will have to find another one... just down to how to find the right one...Like i said 470 cfm is max.... I wished I could find a AFB smaller than 500..like a 450 or something.

Frank

 

[Anonymous]

here's a 4300 core on ebay for $20 (with shipping)

http://images.google.com/imgres?imgurl= ... s%26sa%3DN