Thanks for the information Eric! This is as close to a set of these most of us will ever get.

Lee Shepherd [RIP] was the first to spread the ports AND roll the intake CL upwards. Yards of welding involved. Which required a sheet metal (fabricated) intake as no "as cast" manifold was able to fit the raised&spread ports that made RM's car[s] dominant in '83-'85 Nhra prostock. And Shepherd's driving was termed "fearless" by Bob Glidden😉

Thanks for the video, all the best to you and your loved ones

Haven't built an engine in 35 yrs, but still enjoy all the info!

That's one awesome head!

Really enjoyed seeing this video. I had been curious about the other spread port heads that Brodix makes compared to the 14.5’ heads I’ve been building my big block around. Still have to come up with rocker stands, springs, locks, retainers and locators for mine but I’m gettin there. Pretty sure mine run the same valves you showed here. Bought 2.52 and 1.86 by 6.750 for my setup. Took a little while but recently got my crankshaft back from Mile High in Colorado. Still clearancing my block now that it’s back. Only running a 4.610 bore compared to the 4.625 you mentioned that the engine uses in your video. Wanted to have a little wiggle room in the future in case of a blow up but may be kidding myself entirely thinking there’s gonna be enough left to bore and save or sleeve if that ever happens. Haven’t spoken to anyone yet about a camshaft recommendation for mine but should be doing that soon. Don’t know yet how much lift I’ll have enough clearance for, the specs from CP show over 16-1 static compression. As far as the intake I really lucked out by finding a used profiler cast tunnel ram set up for a single 4 fairly cheap. Just had to change the top for dual 4500’s. Working on my oiling system as time permits lately, considering adding extra drains to the backside of the heads to allow me to add AN fittings to promote drainage away from the valve train. Not absolutely sure it’ll be necessary but know my cousin had problems with oil pooling up there with the Pontiac spread ports. I assumed the drains would help with avoiding oil drain back in the valley creating windage. Still have some more machine work I’ve got to do going along with the fitment prior to final assembly but may be contacting you in the future at Weingartner Racing Eric. Been busy working on backhoes and skid loader hydraulics lately but getting back to it soon. Again, great video and really informative.

Eric the first spread port heads were 385 casting developed by EPD and cast at Brodix for Pontiac, they were a 15 deg head and would flow 496@.800 lift.

Great video In 1995 we made DRCE heads for P/S 4.900 bore spacing 2.625 size intake valve 55 deg seats Lots of work Crazy what u can buy now

Great content thanks for sharing

On the intake valve does the extra margin on the titanium valve change the low, or is it more noticeable on the exhaust? Or, does it only matter on the what the opposed valve to what you have open has that effects the lower flow because it adds shrouding?

cool Brodix head

Nice videos and very informative. I'd love to see what think about the CID DM 500 CNC Ported Symmetrical Port Big Block Chevy heads. Any chance you could review them ?

That's an insane head

those valves are so tight in there

In theory I guess a feller would want those ones! Paired with the correct valve train events obviously.

Are those Edelbrock Big Victors in the background? The ones with the rotated valves?

The flow on the intakes is perfectly linear . All the way . Amazing . If you double lift you double flow .

Be better off with symmetrical port heads rs-x?

One thing you forgot to mention was induction, that ain’t gonna be cheap either, lol.

Great video eric, great head, it would probably be a bigger effort on the long runner, less on short, to port them to end up getting a closer/even 8 inlet ports.. I have seen some12* Profilers that flow 560cfm with a smaller valve,approx 2.425" 2.450"...i very decent serve of porting on inlets...

Nice, is this the same port configuration as the new 632 from Chevrolet that makes 1000 horsepower NA?

Eric, as always hella interesting! Brodix is advertising a "Maneater Head." Have you had a chance to test them?

Eric, without using Titanium valves and other exotica, where does Brodix get off charging so much for these? They're made of the same stuff as regular aluminum heads. The pattern making and foundry process is the same. The machining is the same. They may have more engineering time in them, but it's all done on computers now. So what makes em so expensive?

Is it possible to flow that same head with a flatter valve, to see what difference the valve profile makes?

When those zz632 heads hit the market, I’d be interested in what you had to say about those.

Hey are uncoated Titanium’s a issue on the street? I had heard they may not be a good idea.

How does this compare to a Zz632 head, I heard they flowed around 500 cfm?

Ouch $$$$$

Now if you could only get that flow out of the Cadillac aluminum head

Costs big money to go really fast! Well unless you cheat and buy an L/S and put some giant turbos on it. I'm old school, the more cubic inches is better! No replacement for displacement, well unless you buy an LS and throw a couple giant turbos on it!

45cfm difference between the ports up top 😳 what is the primary factor for that?

How would these compare to the brodix head hunter 395 Mc cnc with extra work?

I am shocked at the low lift numbers. 1-.300 lift is not much different than a conventional small block head. How do these compare to the big dukes?

I like how the thumbnail is of a set of what looks to be 23° sbc heads. Edit. Ya. Those .400 numbers arent great especially considering its a huge valve. I know the 55 degree seat really isn't helping much but it still seems kind of weak

I have actually flowed a bigger head, The bodix 9 degree head and it flowed 589 big heads.

Is that 5200 $ a piece

You can run 1 inch lift on a cadillac 500 engine.

16000 for these heads with rockers

Please do a follow up video after you massage them.

5200 each or for both. Each

4700 each jegs

475 cfm

Comments about sb cleveland heads are hilarious. Its not 1970 anymore

I find gasket matching humorous. So let’s design and cast a head and meticulously design the valve train and flow then screw the hole thing up by matching the ports to a gasket that some draftsman drew up that has absolutely nothing to do with the port layout. My gaskets are made to match the ports not the other way around.

Off in not off ten

Seems ungodly expensive...I'll put up my bbc afr 335 468ci with it's v7 ysi blower again anyone that buys that combo...lol JK but I did build entire combo for less than the heads are

Double it in Australia

Why is it so expensive? Ok maybe exotic seats? I don't see where this cost any more to produce than say an Eddy petf rpm big block head. Is it R&D? How can one company produce and sell a head for $1500 and this is over 5k? I can see the valve train going up in price valve train can vary widely but a head better design or not it's just a casting.... especially an as cast. Are they just charging what they do because they can so if you want it you gotta give em what they want or tuff titty

Start spending that kind of money, you're better off going to the MBE Big9 heads.

Won't fit a stock block bore

I’m sorry but if you buy that head with steel valves, you can’t afford that head. Hate when people try to make everything on the cheap.

Forced induction head

These heads won't work well on a n a motor

Ugh

What Brand Head Is This ?

Have you ever Flowed the newer Pro Mod hemi heads that came out back in 2014. They have been Dominating the class since and make about 5400 hp. Compared to Chevys 4500 hp. In the same class . Some of the 405 guy's are running a hemi type engine in their chevy car .