Does anybody have any real flow numbers on these heads. I have a set at the shop and they are nowhere close to the Brodix numbers???
i thought that flow was not the only peice of the puzzle?
my apologizes didn`t understand you owned this thread before i opened my puss whole.that doesnt mean much.a patriot head would haul ass with twins.but they must make some hp. sunset raceraft uses them on some of there 582ci 1000+ hp motors.they have a 2.350 intake valve?.ill bet with a little work by a good porter who knows what to do they can be tuned up to 450+cfm @.900.my bmf 385s are on that same brodix bb-3 casting and have the smaller 2.30 valves curtis touched them up and picked them up from stock 420cfm to 440s still with just the 2.30 valve.
What kinda power will those heads support @ 415 cfm?
how did the car do at the track after those changes?seems like it should pick up a ton!My 565 made 960 HP with 419 on the intake and the flow stalled at .800 lift. After Curtis worked on them they flowed 449 on the intake and didn't stall out at .800 lift. No other changes but porting the heads really and the motor makes 1025 now. Best part is it makes over 1000 hp from 6700 RPMs to 7500 RPMs.
My 565 made 960 HP with 419 on the intake and the flow stalled at .800 lift. After Curtis worked on them they flowed 449 on the intake and didn't stall out at .800 lift. No other changes but porting the heads really and the motor makes 1025 now. Best part is it makes over 1000 hp from 6700 RPMs to 7500 RPMs.
The motor was run for 2 yrs and dynoed at 960 HP after the first season. I pulled the heads and sent them to Curtis at the end of the second season. I checked the lifters and bearings and replaced the timing belt then. Got the heads back and put back on the motor. Ran the motor all last year then dynoed it again before I pulled it apart and made 1025 HP. While the car didn't pick up I changed stuff that would slow it down and it did not slow down so it made more usable power and it would seem to have come from the heads.Sounds like you got a good piece. Glad Curtis was able to find more power for you, but I bet that extra power didn't come from the number on the flow sheet...