03-07-2006, 10:51 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Let's Talk Carb Sizes
Just wondering what formula everyone is using to spec carb sizes.
The two popular ones that I've found are:
1. (CID*RPM*VE)/3456
2. (CID*RPM*VE)/2820
Using my specs, I get two sizes.....
1. (420*6800*.9)/3456 = 743cfm
2. (420*6800*.9)/2820 = 911cfm
Now, I'm staring down two carb sizes that are pretty far apart....
Is a 750 too small? Is a 950 too big?
I need to pull the trigger on a carb for my new FE that's going in my Cobra.
I ordered my Victor FE intake with a Dominator flange....that way I could use a Dominator carb or use an adapter and a regular 4150 carb.....
Let's hear the ideas.
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