Looking forward to the numbers off this build.

I know this is an old video. But my dna heads are still holding up. 383 stroker. Thanks. I bought these heads because of you. 400 dollars. 600 for porting. 160 shipping. 300 for pro 5 angle and back cut tulip valves. 500 for small parts. I was using vortecs. These blew them away. I kept the 2.02 valves.

I have a set of the no name eBay 200 cc aluminum heads, same castings as the enforcers I believe, this is encouraging, pretty decent mid lift numbers. 👍🏻

Great job Pat! Just shows how important the valve job is. I’m learning how to do it myself with neway cutters. Can’t wait for the 355 Dingle ball vortec !!!!

Cant wait too see this engine all together

I have a set of these with the dual (standard and vortec) intake bolt pattern. They have a . 100" raised intake port, I'm not sure if yours are the same, but I used a 1205 and port matched them to the 1205 and knoched the intake bolt holes out to work. It made a nice port. I opened the pinch up a little, smoothed out the bowls, smoothed and softened the guide bosses, and blended the chambers. I used pbm backcut valves that lowered the chamber volume by 3-4 cc's to get 10.5-1 compression on a flat top 383 with a .038" quench. All this with a port matched victor Jr and a comp cams er294hr hydraulic roller cam. I think it should put out at least 475 hp if I can get the tune right with 1 5/8 headers and an 850 carb. It should have plenty torque as well. They need a 2.08" intake valve because of the shitty throat that is the worst thing about these heads and are still better than anything procomp has to offer.. Eric Weingartner did a set of these that flowed damn near 300cfm for his sister's 355. They're a dart platinum 200cc copy and a dart cnc program will service these heads perfectly. The spark plugs is moved about 1/8 inch is the biggest difference. I personally don't think the dart 200 heads flows that great either, but we don't race flow benches or dyno's. Lol

You mentioned gasket matching the intake after doing the heads. I would think going from smaller to larger at the intake port/cylinder head port junction would actually help, a bit of anti-reversion. Like everyone else I can hardly wait to see the dyno results, should be a very nice combo! Thanks!

Bought a set of proheder months after they came out Depends where you get these...mine had avery nice velve job on it still had it checked. After porting first pass I got 308int and 230 at 600 with only a few cc removed. #'s were consistent with a 195c comp port and carried til .750 Lots of potential with min removal in the right places. VJ on those (vid) is horrid glad you went after it. A proper one can net as much as 25 cfm. The drill lappers will never understand this and unseat the other cuts doing this lol. Your getting better man keep up the good work

I'm building a 327 small journal and, I was thinking about getting the DNA performance heads and run a hydraulic roller cam. 😀

love the channel Pat. I am getting ready to start working on my 350 Vortec thanks to your videos.

Love this channel. also can’t wait for the numbers.

Nice work sir. Thanks for flow numbers.

Hey Salami Slicer, if your bowl is even the slightest bit larger than your seat the air will go turbulent right where the step is at. You’ll start to get de atomization of your fuel.

You can open up the chamber below the deck surface to de shroud that intake valve at lower lift.

Absolutely Feckin Awesome name ! My uncle call me back in the 60s

I used the FLo-Tek 1200-505-Angle plug on my 355. I've got a Lunati 101020704 hyd. flat tappet camshaft, performer RPM airgap knock-off intake and a FST 750 manual secondary carb (Holley's work well but the primaries are about the size of dimes and then when the secondaries open they're like 3x the size! whereas these both are the same size and the price was right and they look well made and work well from all reports) and Hedman 1 5/8" headers with a 10.2 static comp. Hope to make at least 430 if I do bother taking it to the dyno

You are very knowledgeable and i really enjoy you videos!!! Can i use these heads on a vortec 880 block that doesn't have the coolant bypass hole?

Those flow numbers are in the neighborhood of the AFR 195 street eliminater nice job , they should do nicely .

Heads look great, with your massaging they should do just fine. I'm looking forward to the build coming together too! Gonna a see some dyno time?

A bigger intake Valve would be shrouded even worse than what you have now.

Just wondering how much would a machine shop charge for what you did here? Would it be better to just go with the eliminator heads

I wonder what the math is for adding the valves and other components plus the valve job ? These are 400 a set now ,then you need springs , valves, studs , plates etc . Perhaps just getting a good bolt on set might be better .

I heard you say peak was @650.but where did it stop making large gains,because when you stop making big gains you have a parasitic power loss due to compressing 16 springs or (32) if you have double springs with that much weight being taken from the engine due to the loss of compressing then without flow gains also.so your sweet spot as far as that goes im guessing the magic lift would be around 550 to 575.

It would be interesting to see these as cast/before pushrod clearance is cut. They seem like 1206 is a stretch for the pinch point because of their cut?

Great information

What valvetrain components did you use on these heads? I found out an old set of iron heads are cracked so I ordered a pair of these. I have comp cams beehive valvesprings and retainers and locks. What spring locator and screw-in rocker studs do you recommend? I already have 1.6 roller rockers for 3/8" rocker studs so I'd prefer to stay away from 7/16". Self-aligning so no guide-plates. My old 1.94/1.5 valves are no good on these heads either.. and I'm looking for valve seals as well. Cam is a Comp cams xfi252hr. 202/212@.050". .550"/.546". It's going on a 2bbl gm tbi truck motor from the early 90s. My retainers and springs and locks are pn 787-16 for the retainers, Pn 648-16 locks, And 26986-16 for valvesprings. Again, I'm looking for a pn for spring locators, 3/8" screw in rocker studs, and valve seals, and valves for these heads. Thanks, your videos are informative and inspirational. I can't wait to see how much power the turbo combo will make.

How much hp are the stock ARF enforcer heads capable of as cast and set up by them?

Just at beginning of this video but sure makes a good amount of difference using a good flowing valve and not what would come with these assembled right?

You must have 1000s of dyno pulls to develop ports like that?

Do you really need to do the valve job? Just clean up & get new valves + l00 length & new seals & new dual springs etc, will it work?

I want to see this engine on the dyno!@😊😊

Love the series Pat. I recently picked up a super clean 99 Yukon. It is going to be my first project and have been reading a bunch or different info in building a vortec 880 casting block. Regarding the cylinder heads I'd like to stick with an aftermarket vortec with bigger valves. Is there anything that you would recommend or better yet possibly sell me a pair that could bolt right on. Thanks for what you do.

Yo pat nice vids .

cool info

How do you think the DNA motoring heads would hold up to boost? Supercharger of course.

I'm interested in some of your beehive springs kits for a small block Chevy

I really can't help but wonder what these would flow with the clean up like you did here but with the 2.05/1.6 valves and cut the throats for a 2.08 and 1.65 valve.

Thank you for all the videos! Just picked up a pair of 305 vortec's. And wondered what's your part number(s) for the bee-hive springs? I'm installing on a forged .060 283/Comp 268. Gotta run better than older 416's (?) Plus the vortec's have hardened seats right? Thanks again.

ello piss cutter i like to know if you be interest in a set of corvette 128 case L98 i have new bronze glide for them i have 300 in parts include the heads i like to sell them close to what i have in the glides. the glide were 200.00 so if you know some one to buy them also a older nice shape edelbrock intake CB-3 for 125.00 and other chevy parts crank and rods .060 seal power FT pistons soif you are interest i have a pistons on Craigslist Milwaukee wi. Thanks Terry

What are you using for your valve jobs?

are you going to have to worry about dropping valve seats with the reduced material above the seat? i wonder if that little bit of extra is for when the heads heat up and expand it can still hold the seat in on that side.

Which intake gaskets did you use? I used 1205 but the port is raised . 100". I notched the intake gasket bolt holes but I'd like a better solution.

I read on forums that people use a valve train kit from competition products, do you know what part number for hydraulic roller? Also do they need +.1 valves and rods?

I can't find ant DNA heads that are 64 cc do you any part numbers for sbc heads that are 64 cc

Lighter valve train= ability to run less valve spring= less parasitic loss= less heat= more rpm potential before valve float sets in. I know you know that, but you shouldn't downplay the significance of a lighter valve train, plus the machining from afr is usually very good, the valves are high quality. When starting with the assault racing head, to bring it to the same spec afr does would be difficult to do for the diy guy and would likely cost more than the package from afr. It is huge bang for the buck. And if the diy guy does some basic bowl work they are even better than afr advertised specs.

Hey how's it going did you ever get those kits together

Is it possible to go to big on the gasket matching?

Need help vortec or DNA heads on my 327 ?

Hey Patt, I left you a email, can you get back to me about it as soon as possible please, thanks again.

Would ANYBODY be running over .600 lift with such cheap heads?? Flow numbers or increases @ .650 seem irrelevant. I think guys that buy these are gonna run a hydraulic FT or street roller up to maybe .560 lift.

Can I use these on a 1991 l98 TPI setup?