dual AFBs & tuning

R

raj4851

Member
Hey Grumpy, I posted on Chevy Talk about my really rich problem with two AFBs on a tunnel ram. You made several comments and then models916 said something about carbureters specificaslly set up for a dual four application. Do I need to get a set of these or can I just buy two 1404 Edelbrocks? Thanks in advance, Rod
 
you can buy two 500cfm
http://www.jegs.com/i/Edelbrock/350/1404/10002/-1

or two 600 cfm edelbrock carbs
http://www.summitracing.com/parts/edl-1406
Ive always preferred the two 1406 carbs
keep in mind when your using DUAL carbs with 8 venturies they effectively reduce the vacuum under each carb significantly so a carb rated at 500cfm as a single carb probably flows less than 350cfm as a twin carb, if your new to dual quad set-ups your going to be thinking 2 500cfm carbs equals 1000cfm, in reality your looking at about 700cfm-750cfm , and two 600cfm carbs flow about 800-850cfm due to the reduced vacuum signal under each carb.
Ive used both sizes and got good results from both. the 500cfm might be easier to tune for most applications but either will work.

ARE YOU AWARE SUMMIT HAS PACKAGE DEALS
http://www.summitracing.com/parts/edl-20254

http://www.edelbrock.com/automotive_new ... vids.shtml

http://www.summitracing.com/parts/cmb-0 ... /chevrolet

http://www.summitracing.com/parts/edl-2 ... /chevrolet

http://www.summitracing.com/parts/cmb-0 ... /chevrolet

http://www.summitracing.com/parts/edl-2 ... /chevrolet

http://www.summitracing.com/parts/cmb-0 ... /chevrolet


READ THESE, and sub links carefully
viewtopic.php?f=55&t=444&hilit=dual+quads

viewtopic.php?f=55&t=1820&p=4706&hilit=1406#p4706

http://www.hotrod.com/techarticles/hrdp ... he_street/
 
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