243 heads: most cfm through stock 2" valve?
03-10-2012, 08:47 PM
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243 heads: most cfm through stock 2" valve? whats the most cfm someone can prove through the stock 2" valve on a 243 head? I had one of my ports on the bench today and it went 322 cfm @ .600 and held it till about .625 then backed up about 7 cfm. stock 2" valve, and based on previous experience the ports probably aren't any bigger than 225cc's. mind you this is still a 45 deg valve job, no trick 50 or 55 deg stuff. all other info is classified 
