Ford Carb size per Classification Guide

Robert Swartz · 11-17-2013, 01:34 PM

1978 Ford. Trying to clarify here. Looking at the Nhra blueprint guide. For the carb size it's listed as:

Carb Sizes - 1260 x 1420/1023 x 1064

My question, what number do you use? Is this two seperate numbers for different carbs? Do both these sets of numbers come into play somehow? Forgive my ignorance, just trying to interpret the information.

jmantle · 11-17-2013, 01:46 PM

Quote:

Originally Posted by Robert Swartz

1978 Ford. Trying to clarify here. Looking at the Nhra blueprint guide. For the carb size it's listed as:

Carb Sizes - 1260 x 1420/1023 x 1064

My question, what number do you use? Is this two seperate numbers for different carbs? Do both these sets of numbers come into play somehow? Forgive my ignorance, just trying to interpret the information.

My understanding is it refers to the primary and secondary venturi and throttle bore measurements.

Jim Mantle U/V/SA 6632

Joe Toller · 11-17-2013, 02:59 PM

That looks as if it's under the 2.3, the Holley/Weber carb. the 302 shows a Ford carb. You may have to refer to your tech director, but the 302 should be the 1.08 venturi Autolite? That's what came off my 78-vintage motor. I have a 79-vintage D9DE which is also, a 1.08 venturi Autolite.

11-17-2013, 01:34 PM	#1
Robert Swartz Senior Member Join Date: Aug 2008 Location: Nineveh, Indiana Posts: 512 Likes: 0 Liked 3 Times in 3 Posts	Ford Carb size per Classification Guide 1978 Ford. Trying to clarify here. Looking at the Nhra blueprint guide. For the carb size it's listed as: Carb Sizes - 1260 x 1420/1023 x 1064 My question, what number do you use? Is this two seperate numbers for different carbs? Do both these sets of numbers come into play somehow? Forgive my ignorance, just trying to interpret the information. __________________ Robert Swartz - Swartz & Lane 66 Chevy II Pro 95 Achieva EF/SA, 78 Mustang II U/SA (work in progress) #354 stock

11-17-2013, 02:59 PM	#3
Joe Toller Senior Member Join Date: Jan 2009 Location: Lewistown, Montana Posts: 550 Likes: 78 Liked 4 Times in 4 Posts	Re: Ford Carb size per Classification Guide That looks as if it's under the 2.3, the Holley/Weber carb. the 302 shows a Ford carb. You may have to refer to your tech director, but the 302 should be the 1.08 venturi Autolite? That's what came off my 78-vintage motor. I have a 79-vintage D9DE which is also, a 1.08 venturi Autolite. Last edited by Joe Toller; 11-17-2013 at 03:02 PM.