4300 Carb Replacement Advice Needed - Page 2 - 460 Ford Forum
Engine Tech A place to discuss all 385-series engine tech and theory.

User Tag List

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
post #16 of 20 (permalink) Old 01-28-2013, 12:27 AM
Senior Member
 
Join Date: Nov 2009
Posts: 393
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
 
I see this carb engineered to be the best of the "bowl" carbs, and there were some decent ones. The "Thermoquad" for example. On a dual quad intake, you would have 1250 cfm for your max power and you would cruise around on the 4 small primarys. Easy to tune and you do not have to pull the carbs off the intake to change jeting or run the carbs sideways. No more having to drain float bowls to change jeting. I'm talking a high performance street engine. I'm willing to try them. And there are a lot of 460's running around with 600's on them. my motor home for instance. And it is going to get a 625 Demon and see if will return an increase in HP and fuel economy.
DanE is offline  
Sponsored Links
Advertisement
 
post #17 of 20 (permalink) Old 01-28-2013, 01:29 AM
Senior Member
 
Join Date: Jan 2006
Location: Von Ormy, TX.
Posts: 3,297
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Quote:
Originally Posted by 429TORQ View Post
Just looked at the carby, it looks like it will only fit the 68-73 bbf intake with a 1/2" or 1" open spacer(or the 3v spacer Randy mentioned). I had no idea that it had that "married" style secondary plate. If his '74 460 has the "big" ford spreadbore pattern(4350 style) I don't know what the deal will be.
Just looked up the carb applications. What I can see 1974 is 4300. In 1975 everything is 4350 except some of the "early" 1975 trucks having the 4300. Guess the OP best verify he has a 4300.

Steve
68xr7cat is offline  
post #18 of 20 (permalink) Old 01-28-2013, 09:14 AM Thread Starter
Junior Member
 
Join Date: Sep 2012
Posts: 24
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Quote:
Originally Posted by 68xr7cat View Post
Just looked up the carb applications. What I can see 1974 is 4300. In 1975 everything is 4350 except some of the "early" 1975 trucks having the 4300. Guess the OP best verify he has a 4300.

Steve
Yes, verified as a 4300, not the 4350.
The Big One is offline  
post #19 of 20 (permalink) Old 01-28-2013, 09:26 AM
Senior Member
 
Join Date: Jan 2006
Location: Roseville MI
Posts: 10,800
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 88 Post(s)
 
Quote:
Originally Posted by The Big One View Post
Thanks Randy. So if I were to consider the route you've suggested, would this barrel type plate be custom made or do these already exist?

Thanks everyone, this is all great information and very helpful! Please keep your opinions and advice coming.
They exist OR making one is pretty easy ... also Holley made a zinc spacer especially for doing this very thing.

I have a few, send an IM if you are interested.

I don't know of anything more production than using an 80's FORD OEM Holley carburetor.

I don't know about Motorcraft carb numbers as I went by your description of a 2" spread secondary bore carb. If it is NOT this type carb you won't need any special adapter for anther brand carb with a 1 9/16" throttle plate or smaller.

www.rmcompetition.com

R.M. Competition - The finest Custom Engine Building for any venue ... !
Selling Parts and Supplies from companies I use ... 1(586)909-1591

CUSTOM ground camshafts
Carburetor modifications for specific applications
CNC porting

Last edited by rmcomprandy; 01-28-2013 at 09:34 AM.
rmcomprandy is offline  
post #20 of 20 (permalink) Old 01-28-2013, 10:59 AM
Senior Member
 
Join Date: Jan 2006
Location: Von Ormy, TX.
Posts: 3,297
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
The 4300 is the one you can bolt a 4150 holley in its place. Don't think he would need any adapters or anything.
68xr7cat is offline  
Sponsored Links
Advertisement
 
Reply
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the 460 Ford Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome