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Brodix catalog shows this head should be closer to 300 cfm.
good thing i didnt buy new.there is some bowl work but thats it.
we `re thinking that if we open up the intake ports up ,it will improve the flow numbers. I recommend anyone who buys cylinderheads new or used to haved them flowed , saves the disapointment at the dyno.
Dart is the biggest mis representer in flow numbers from what they "claim" to what they actually flow. Brodix has had a pretty good reputation from the few guys I've talked to, but obviously if your catalog claimed them at 300cfm and they only 260cfm...that's roughly about .4 on the track and a huge loss in potential hp.
AFR is expensive, but at least what they advertise is what you actually get.
Brodix catalog shows this head should be closer to 300 cfm.
good thing i didnt buy new.there is some bowl work but thats it.
we `re thinking that if we open up the intake ports up ,it will improve the flow numbers. I recommend anyone who buys cylinderheads new or used to haved them flowed , saves the disapointment at the dyno.
i should of went to 18 degree cylinderheads
HELLO!!! the flow chart is for a head with a specific CNC port job (you can assume safley that it has the most $$$extensive preparation package$$$, with the largest valves.
Your heads have " some bowl work" Not the same thing.
Once your heads are prepared like the ones in the test, they will flow the ###'s
Doesn;t matter if its AFR, Dart, Brodix or World Products, if you want the CNC package flow numbers the heads have to be CNC ported (with the same CNC Program and valve contour.). Ya get what you pay for.
Originally posted by F-BIRD'88 HELLO!!! the flow chart is for a head with a specific CNC port job (you can assume safley that it has the most $$$extensive preparation package$$$, with the largest valves.
Your heads have " some bowl work" Not the same thing.
Once your heads are prepared like the ones in the test, they will flow the ###'s
Doesn;t matter if its AFR, Dart, Brodix or World Products, if you want the CNC package flow numbers the heads have to be CNC ported (with the same CNC Program and valve contour.). Ya get what you pay for.
i know theres the cnc heads but these heads are the regular Raised runner heads.Which states it closer to 300 cfm.
Originally posted by daverr i still have them flowed.too many sales pitch out there.
I totally agree, and was another reason I had them flowed-alot of other reasons actually. When I told the guy at the shop what these AFR's were supposed to flow, he looked them over, snickered and guessed 260cfm max. Once they were done I went back out with my AFR catalog with the marketed flow numbers, showed him before ever seeing my sheet and he was amazed.
Nice to know once in awhile you actually get what you pay for. There are other racers I talk to that own machine shops and have had the same findings with all above mentioned brands so it's not just a few guys and a rumor mill-it's just a fact, just like Holley over rates the flow on their carbs...marketing ploy.
That should be very interesting. I took all my values form my stuff and entered it into my DDyno and it came up with 575hp. I wanted to dyno the motor, but did'nt have the time as racing started within a few weeks of drivetrain swap. I am going to chasis dyno later this year for fun and that should give a closer indication of what the motor is actually putting out....but after 2 years of racing and street miles I'm sure the power will be a tad lower due to valve springs being worn and rings wearing a little...still be fun though.
Let us know how you come out, would be nice to see computer estimate with real world. Just be sure to get the air data from the shop so you can match the air on the simulator as closely as possible to the dyno room.
Well decided to trade up the Brodix -10x for the Brodix 18.I still
need to buy the valves,springs,retainer etc.I will have these heads Flowed. Here are some pics.
The guy who does my machine work almost always uses Brodix heads. He did say, and I have read and heard this elsewhere, that they generally need to be ported to flow well as they dont flow well out of the box. That applies, I'm sure, to non-CNC'd heads.
There are lots of variables that have to be taken into account as far as a flow test go. What bore size were the heads flowed on? Were they flowed with or without a pipe on the exhaust? What size pipe? What about a radiused entry on the intake? Not to mention every bench is different and so are the operators processes.
I hope you plan on spinning that motor pretty high with that intake setup and have a valvetrain that'll support it
