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Home » HD Forums » Forums » Boat Tech » how many cfm
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wake309Male Offline
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Post Icon Posted: Sep. 05 2005,8:49 pm Post # 1 see this member send this member a private message  quote this post in reply
what size carb would you run on stock vortec 350 with performer rpm manifold, hei, and headers? 600cfm?
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Post Icon Posted: Sep. 05 2005,9:08 pm Post # 2 see this member send this member a private message  quote this post in reply
That'll work.....

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Post Icon Posted: Sep. 06 2005,5:36 am Post # 3 see this member send this member a private message  quote this post in reply
That'll probably work, here'a a formula to determine carb sizes!. :good

Formulas for air capacity & volumetric efficiency
Theoretical cfm = rpm x displacement / 3456
Volumetric efficiency = acutal cfm / theoretical cfm x 100
Street carb cfm = rpm x displacement / 3456 x 0.85
Racing carb cfm = rpm x displacement / 3456 x 1.1

Edited by GoFastRacer on Sep. 06 2005,5:36 am
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Post Icon Posted: Sep. 09 2005,3:18 pm Post # 4 see this member send this member a private message  quote this post in reply
Quote (wake309 @ Sep. 05 2005,8:49 pm)
what size carb would you run on stock vortec 350 with performer rpm manifold, hei, and headers? 600cfm?

Just make sure you dial it in, you know jets, rods whatever to get the A/F ratio right for what you are doing-->that is for the best performance or economy, if you just want it to run-->throw it on and go.

It's only a small block
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