Looking to pick some of your guys Brain s .  Want to dial in my dual tunnel ram with 600 Holley vac secondary's . I know they aren't the best choice but that's what I have right now... Every input would help . I have dialed in single s so I'm not to green behind the ears lol


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If you don't have the balance tube between the secondary pods, that'll help.  I'd say start with the lightest (yellow) secondary springs and a 4.5 power valve.  If you don't know where to start with jetting, I always recommend starting with the original jets and adjust from there as needed.

Ok cool so both will open the same time
And when I rebuilt the carbs I put 6.5 PV gonna work??
Idle circuit tunning ?


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I run the same set of carbs on my 460. Make sure you get your idle mixture screws set correctly before any other tuning, it will make things a lot easier. definitely recommend using a vacuum gauge also for best results.


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How far are you trying to turn the idle down? My bbc with a tunnel ram and 2 600's will not idle below 1200 rpm unless its under a load. any lower it dies..

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