With all the hype about small vs big inch mtr. I dialed up Self racing last thursday about their Brodix clone 18 degree heads that have an advertised flow of 420CFM (brodixs flow #'s are 383(CFM) both being fully CNC ported. Self racing sells their heads ready to race with .750 lift roller spings for $3500.00 and a matching manifold for $1000.00. The reason i called them was to get a comparison between my brodix 10rp's which flow 314CFM at .700. i was told that it would be 75 and 125 HP difference. that's a lot of improvment over 23 degree heads. I'm thinking maybe with my current setup (434") it will have close to 750HP on alcohol. If i had the money i would make the switch even having to replace the pistons and rebalance. That's a lot of gain when you consider what it cost to get the HP above 700 in in a s/blk and you wouldn't have to spin it above 7500 RPM.
Zip.