FYI FORD MustangSteve's Ford Mustang Forum / Edelbrock Carburetor Tuning

**Posted by John Ha** 5/27/2020 8:38 AM

I love my Edelbrock carb but I had issues when I was trying to follow the Edelbrock manual to select a rod and jet combination to make a small change. It seemed to me that the steps in the manual were too large to really fine tune the carb.

So I did what any good engineer would do - I created a spreadsheet that calculated the areas of different rod and jet combinations. This allowed me to choose a rod and jet combination that was slightly richer or leaner either in "cruise" or "power" while minimally affecting the other setting ("power" or "cruise").

I sorted the information and added some "how to use" instructions to the bottom of the second sheet. The information covers the 1403, 1405 and 1406 Edelbrock carburetors specifically and can also be used for other models.

Last edited by John Ha (8/21/2020 8:49 AM)

**Posted by Alessandro** 5/28/2020 2:10 AM

Hello , i had same issue with edelbrock 1403 . After long speek with mom edel , comes out that was impossible to lean more than chart . At the end gave me an excel page to use .( rod flow charts )
I think can be a nugget in right hands ... .
Once yellow spot are filled with rod and jet size , pattern move leaner and richer showing with %
Fill with edel basic settings and see where % are positive or negative .
unlucky i see excel file cannot be uploaded .
will send a message to MS if can help

**Posted by John Ha** 8/21/2020 9:00 AM

Alessandro wrote:
Hello , i had same issue with edelbrock 1403 . After long speek with mom edel , comes out that was impossible to lean more than chart . At the end gave me an excel page to use .( rod flow charts )
I think can be a nugget in right hands ... .
Once yellow spot are filled with rod and jet size , pattern move leaner and richer showing with %
Fill with edel basic settings and see where % are positive or negative .
unlucky i see excel file cannot be uploaded .
will send a message to MS if can help

This does the same basic thing but you have to use your brain a little more. :-) I originally did these in Excel and, as you say, they can't be uploaded in that format. So I converted them to jpg formats and uploaded them that way. They're as easy to use but don't show all the math. :-)

**Posted by John Ha** 8/21/2020 9:02 AM

Adding some information for the 1900 series AVS carbs

**Posted by John Ha** 9/11/2023 6:28 AM

I uploaded these in their "native" Excel formats to my Google drive. There are several sheets within the workbook, which are accessible using the tabs at the bottom, and instructions for use pasted on each of the sheets. The sheet that comes up first has all of the different combinations for all of the carb variations. There are two large tables on the first sheet. The left one is sorted by "cruise" and the right one is sorted by "power".

Last edited by John Ha (9/11/2023 6:36 AM)