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Discussion Starter · #1 ·
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???
 

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I have the early first version of those heads with 351 runners and when new they too did not match the factory advertised numbers. When I posted that a Brodix rep actually contacted me about that. After several phone calls he determined mine must have missed the final clean up and polishing when made. I workd on them and with some sand rolls smoothing out the machine marks did get them to flow advertished numbers. Contact Brodix and talk to them. They really seem interested in what people say and think about their product.
 

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I've heard that a number of times about Brodix heads. ALWAYS inflated #'s. I know of a set of 1803 that were 30 off the advertised #'s???
 

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i thought that flow was not the only peice of the puzzle?

I would agree with that but if a company says something flows so and so, it should do that. Mine were advertised to flow 418 on the intakes. They actually flowed 385. And if you question our flow bench, when Boggs ported these heads 2 yrs later his numbers were checked on our bench and they were exactly the same. Many people beleive you have to move so much air to get so much HP so flow numbers can be important to them.
 

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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.
 

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i think 415cfm COULD make close to 1000hp at least 950hp?.
 

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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.
my apologizes didn`t understand you owned this thread before i opened my puss whole.
 

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What kinda power will those heads support @ 415 cfm?

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.
 

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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.
how did the car do at the track after those changes?seems like it should pick up a ton!
 

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I changed the rear gear, reset the 4 link/shocks and added about 100 lbs to the car and it didn't run any better due to those things. My goals/objectives for the car changed. And my fat finger hit the wrong key on the prior post. My heads only flow 440 not 449 as I posted earlier.
 

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Discussion Starter · #15 ·
It took a lot of work to get the heads where there at. the heads started out with a peck flow of 421 cfm @ .800 lift and after that they started backing up. ...We put our NOS chamber on the heads,did a valve job and some port work


Flow Numbers @ 28 inches

2.350 intake valve 91.5% throat 50* seat

.200 165 cfm
.300 240 cfm
.400 290 cfm
.500 351 cfm
.600 408 cfm
.700 439 cfm
.800 458 cfm
.900 473 cfm
1.00 485 cfm
1.100 496 cfm
1.200 508 cfm




 

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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.

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...
 

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i think you've hit that head bolt hole pretty hard.

What happens when you put a bolt/stud in there?

Do you do your development with something in there to simulate a stud?
 

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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...
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.
 

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hey tomato head. it sounds more like you have something up your ass not your pussy.all i said is with twins it should fly excuse me for replying with common sense.
 
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