A few years ago I called K&N and asked about the air flow requirements for my my 505 cubic inch engine at 6000 rpm. It made peak power on the dyno at that rpm. They said it required about 745 cfm of air flow. I noted my dyno sheet indicated the scfm at 6000 rpm was 839 cfm. Also with other formulas on the internet to determine the cfm requirements of a engine based on cubic inches and rpm can differ. I mentioned all this to the K&N rep and his reply was they had their own methods to determine required air flow.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
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