Super detailed AFR BB Chevy 'Enforcer' head review
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- Опубликовано: 10 сен 2024
- In this , episode 34, DV gets to grips with the new AFR 'Enforcer' BB Chevy heads. Is it as good as AFR claim? Certainly the flow as much and, at some lift points more than AFR claim. however flow figs are not the not the 'be all & end all' of a power development orientated review. But with DV advanced IOP head porting program very close output predictions can be generated. We think you will find this to be about the best RUclips BBC porting video ever but we are also sure that if you disagree you will be quick to let us know.
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A great video. Thank you. What I like most about it is that the basic principles you discuss can be carried across to many other heads. Regards Greg
looking forward to being enlightened with your sbf camshaft talk
Enjoyable to watch a Master at work thanks for letting me learn .
I can't wait until the video comes out for the Ford camshafts, premo information
My father was the first or second guy… it’s a long argument lol. to manufacture a “billet” hemi cylinder head for nitro and alcohol drag racing engines. He was a very out of the box thinker. When most guys where obsessed with ports my father was obsessed with chambers 1st & ports 2nd. These videos for me validate his ideas. I can’t thank you enough for being so open with your proprietary knowledge. I grew up around some of the smartest guys in racing. I’m so thankful they where open books and believed in me. I owe it all to staying busy cleaning and sweeping floors. I pray that the younger generation cares to learn as much as I did. The massive talent possessed by the guys racing in the 60s 70s 80s was unreal when performance was built not bought like now days.
Great video, that must have taken quite a bit of work DV. Thank you!
Chad Spiere is my personal Favorite Head Porter.
Then Darin Morgan too.
David Vizzard is one of the all time Greatest Engine Builders and Teachers.
Br Re, thank you sir. Those two guys are on my good guy list as well as your!!
everytime I come back and re-watch DV, I hear and see something new. So much information.
I have the cnc ported version of these heads on my 427 60 over so if he said they can be used on a 555 or 540 then they will be good on a 496 Richard holdner was saying they were only good up to 468 cubic inch I think I'll take David's word over Richard's. I'm glad I seen this.
Well, I watched it 2x in an afternoon, and bits of it 4x, and learned something with each viewing. Thanks for taking the time and doing the work to show us what can be had for a BBC.
I learned a few new Porting tricks from You Today David.
Pontiac V8 Large Valve Factory iron heads 2.11" intake & 1.77" exhaust valves equipped 1968-1972 years are pretty well enshrouded from the Factory, always wondered why the deep radius scallop machined fly cuts were present, now know why.
Improve the flow discharge coefficient.
I will check with different guage balls on the next set of Factory iron heads I port for myself at home.
Thank You for your videos.
An hour of gold. Thanks a million
You are welcome!
Wow, an hour packed with a ton of knowledge. Thank you, David for sharing your knowledge and Secrets!
Yes, we can be thankfully with DV for to give us all if his knowledge
While I'll never buy a set of BBC heads. There was an amazing amount of useful information that can be applied generally.
Regards
Jordan
SOO ready to attend one of DV's seminars.
DV, I have to mention that you are comparing each port change to the modified port just prior to the change. If someone is not paying close attention they may not see that. This is the most comprehensive look at properly flow developing a port while most importantly maintaining or increasing velocity that I have ever seen.
guys - please note Kurt's comment as that is just what I am doing.
Thank you once again for sharing your knowledge with us, I have missed seeing you at PRI. take care my friend.
Thanks David. Great video. The cutaway views and your detailed explanation was great. I’ve always been interested in porting but don’t always understand the terminology so this was very helpful. Regards.
Thank so much you Mr Vizard. A true wealth of info.
Please consider doing a series on the VW 1.8t 20v engine and the two head options (small port and big port ) you would make so many of us very happy.
The chambers of that head on the desk are AWSOME!! It’s like a wedge version of a boss9🤩
Extremely useful information. Thanks again DV
Just got your book on BBC engines. Outstanding information. Looking forward to 2022 seminar and class schedules.
Mad Skills.
Fantastic Video!!!! Thank you very much for sharing your knowledge.
Excellent review and porting lesson , thanks David .
I am having a set of these heads being sent over to flow and port for a 632ci motor. So, I am very interested in your video. I would never use a head like this, personally, but I like a challenge.BTW, square exhaust ports! Good luck finding headers Lol! Thanks DV
Excellent video David. Thank you for doing.
That was an information packed hour, thanks DV! I’m wondering about 468/496 vs 509/540. I think your flow results were for a 4.310” bore. The effect of a 4.500” bore would seem to be significant. You mentioned needing to mill the heads for a 454/468 engine. Do you have thoughts or rules about dome shape to get adequate compression? I’ve imagined that a dome biased to fill the intake side of the chamber and put most of the cylinder charge around the spark plug and exhaust valve side would help, but I have no data to support it.
Hello David, thanks for this very nice and instructive lesson. I would love to see a similar detailed video on your valve seat job, how you manage to make the off-center throat and more, would be great. PS trying to use the 90days trial version of your IOP but it seems not working, hope to get more assistance from Marvin. Thanks again!
nice upload mate, thanks for the share. cheers.
Let me guess - your an Aussie! So was my mom!
@@marvingvx1 lol, no mate im from the UK! :)
Thank you for sharing you years of knowledge and experience....
Much respect to you.....
Thanks David! I am so glad you are sharing you knowledge. I would like to see a video on small block mopars. Especially the magnum series.
Well here's the deal Ray - so many folk have asked for such that it is on my must do list. I won't be out though till mid year 2022.
@@marvingvx1 looking forward to it. Thanks!
Good info Mr Vizard…appreciate you sharing with us. 👍🏻
This channel is dead for now, find his other channel here: www.youtube.com/@DavidVizard
Best vid yet. Bravo.
I could not ask for any more detailed information on a head then what you gave I have a set of the afr 265 oval ports on my 427 that's 60 over so it's a 439 people didn't believe that Lil big block made 661 hp and 605 torque on the dyno the cam was a Howard's 235x241@50 618 lift on a 108 lsa I think I got lucky picking that cam it's got a Victor Jr. Intake with a 950 I think I put together a nice combo I do have a solid lift cam I was going to try that has 256x260@50 with 666 lift on a 110 lsa I don't know if I will benefit from this cam as much as I want it to have good street manners thank you for the video.
This was simply the best porting video I have ever seen. I almost feel bad I only paid a like for it.
I am not familiar to these heads. Can somebody explain why do we call one intake port "good" and the other "bad", please. I know about the different angles of the ports, but which one is the good and why?
The intake ports are not all the same on BB Chevy heads. Half of them have a non-ideal angle in relationship to the valve opening angle.
The 'good' port aims the charge more toward the cylinder center while the 'bad' port shoots it more into the cylinder wall.
Thank you!
Thank you for the information
At 43 minutes - The combustion chamber is starting to look like a hemisphere! Who ever thought a BBC head could become more like a hemi.
Can’t wait to attend one of your porting classes. Great video
THANKs DV. For us street folks, it would be nice if some manufacturers would offer a small chamber BBC head in the vein of the Chevy vortec 96cc head. This would allow one to run a flat top piston for improved combustion and torque.
Flotek makes a nice looking 290CC intake runner head with 110cc chambers, I was thinking about them for my 502 motor going into my Airstream motorhome
@@xozindustries7451 I think it's about time for me to look at these heads!
What cam would you recommend for a 10.5:1 mark IV or gen 6 496, these heads, th350, 1990 454ss pickup, 3.73 gears and a 3500 stall. Truck weighs 4000 pounds with me in it. Im looking to build a fun street terror tire-smoker!
Thanks in advance Mr. Vizard!
Coating’s are the keyword.🤜🏼🤛🏼😎
Chemistry is all that matters.
What's up with the segments of Audio missing? Wealth of info on this casting. Bought the KMJ Assault, believe it is the same casting as this Enforcer. Wish they'd have cast the Exhaust port parameter's inward an eighth inch all around leaving port shape to be user defined. D Port into a round tube has more appeal to my sense of logic, they need to change the exhaust casting core sticks. About the nicest as cast Chambers... I've seen.
Goodness me... I keep having visions of how those “Top Fuel” step style ports, that had trellises. Somehow droppletes travel fast at every scale due to the valve seat seal being broken.
Instantaneous seal brake has to be, an in between force.
Because it’s fast.. with very minimal movement.
Movement being the keyword.
Sealed.....broken.
Speed... >speed of sound.
Thank you DV
Isnt there a trick where you can be flowing air through the port and you can shoot some uv die through the port at the rpm you are aiming for and then stop and spray some developer in the port and it will show you where it is eddying inside the port?
Great video - seems to be a great head except for the huge guide boss and the cheesy spring pocket boss - looks like a recipe for a tow with my boat when the spring blows through the pocket , lets loose of the keepers and valve gets intimate with a piston
If i may make a suggestion. When having the words scroll up the screen a tad slower would be great😁. Thanks for sharing your thoughts with us.🤗
Done deal!
@@marvingvx1 🤗 thank you very much. Also the music in the background helps me to focus better😁
Greit lessons! Thanks for knowledge!
I could be wrong, but my mind tells me, anyone building a 540ci ain't even going to glance at these heads!
Hello David, thanks for all your videos. Wondering what would be your opinion of the Eldelbrock E-200 heads for a 383 SBC.
I would suggest breaking a video like this down into 20 minute segments. You will get more views and thus more money for your channel. Also many people won't just fire in on a video over an hour long as that is a big chunk of time from most peoples day. I do really appreciate the tech heavy content like this that you won't find anywhere else. So curious on this package on say a 540cid at 5000rpm what hp difference do you think somebody would see from all this work? I mean if you spin it on up I can see some big gains coming from the work you have done but how close to the feeding needs for 5000rpm do these heads come right out of the box?
You are the best Brian have to say you have one of the best channels on RUclips I am not easily impressed but you have the knowledge and machines to do the job with the balls to try it and make it work
@@harrymiller3986 Thanks! I appreciate the accolades. I am not the fastest or showiest but I like to do good work. I like to build powerful and reliable engines too though. 😎
The large de-shrouding shape for the exhaust valve resembles the GM 820 Bigblock casting chamber. Did you design that GM heads chamber?
Would be interesting to know
Super content. Mr. Vizard, thank you for all you do and have done for performance. Looking forward to the Ford cams..
Once had a cam Dynamics cam for Ford big block with great midrange, whatever happened to them?
Can you do a short video on die grinder technique, ie how to minimise skipping and improve control, those kinds of things?
Todd, it's on the cards but I cannot say when.
@@marvingvx1 Thank you! I just figure there is no one better to learn the sorts of things from!! I'm sure i've been doing it wrong for years!
Great video
Very good info.
D.V.? Please scroll threw here and see the Canfield big block Chevy head's. My Uncle and I noticed the Canfield heads he has is not the Garden variety Canfield head's but the big boy one's. CNC combustion chamber, CNC intake and Exhaust bowls, CNC intake port Entrance, CNC exhaust port exists. It's on a very healthy 540 making North of 900 horsepower on 10.5:1 compression. We plan on spraying 250 to 375 Horsepower worth of nitrous by a True Double Cross plate. I'm wanting to know if you could find a set of those and run a thing like you did here? Your information is second to none.
I have ported several sets of Canfield heads but none since John, the boss there, retired and that is some years now. These heads can produce good results.
Just wondering is this the same or similar to what NHRA allows as a superstock replacement ?
What would the cost be to have you do this to a pair heads?
Thanks for the video David, I was wondering what your thoughts would be on these. I'm looking for some heads for a mild 454. I'm wondering, All things being equal as they can be would a 290cc version of these be better for something that has a .550 lift and lower duration? Or, maybe a something like the 290cc promaxx heads?
Andy, I have not dyno tested the Promax heads because it is a brand I stay away from. The AFR 290 are real power houses but note my cam recommendations.
Can you recommend an air tool oil, you mentioned it in the past but i have fore gotten it Thanks have a merry Christmas
Want more Port Velocity with these cylinder heads? Put more Cubes under em'
AFR maybe getting their foot in the door for all future AFR castings to come out of China. The Pro Maxx head is cast off shore followed by some very elegant machine work in the U.S.A. Always boils down to dollars and you're the un-knowing beta tester for awhile. I had a PRW experience that left me feeling like a beta tester when several of their shaft mount rocker bearings blew the sides out of the cages. (BBC rockers rated @ 750# yield and couldn't take a dozen passes @ 680lbs open) No matter, the average weekend racer is no longer going to be able to afford parts. You get what you pay for... and it ain't much anymore.
At 25:35 you say that taking off more than a minimal amount in that area will cut swirl and flow, because the air will enter the chamber in a direction that opposes the flow from the more cutaway area. I don't doubt that that is true, but my question is; how do you actually know that the air does or would flow in that direction, in that area, given that you can't put a camera in there and actually watch it? Are you simply inferring these facts from swirl and flow data? Also, at high lift, doesn't the air tend to flow almost directly down the bore, rather than perpendicular to it?
About another 100 to 150 cfm is needed at about 800 8nch lift.
Hopefully AFR does not cheapen the quality of their heads since they have been bought by TPE, a private equity firm.
HI DAVID ANOTHER GREAT VIDEO, IM BUILDING A 421 CI. SBC WAS THINKING ABOUT USEING THE MCFARLAND INTAKE DID YOU EVER DO ANY TESTING WITH ONE, I THINK IT SHOULD MAKE SOME STRONG TORQUE NUMBERS, WHAT DO YOU THINK?
Thank you!! This is why you’re the man! I got to see this again. Ooo one thing ? Where do you get the balls? I know you don’t go to the part store. I can’t even get them to find plug wires. Good job DV you are the best and lots of tricks to. I’m not trying to be funny sir but how many heads do you have to do to get them to kind of work like your do?
Thorpe makes the flow balls.
Great Video David, just bought your online book how to build a killer Chevy bb. I’m a novice who just purchased a dart big m sportsman block , in view to building a 540 bbc stroker , having real issues trying to get the right advice on parts, mainly cam choice, as a huge fan of yours it would mean a lot to me if you could help me select the perfect hydraulic roller cam, preferably a comp or Howard’s , it’s a 9.800 block with 4.500” bore 4.250 stroke crank , 6.385 rods mahle +13cc pistons and I was going to purchase a set of afr 335cc heads , was aiming to get around 750hp with equivalent torque, haven’t got a manifold yet either , will be running a Holley hp racing series carb. Going into a 1970 chev impala coupe with a T400, going to be a tough streeter has vacuum brakes. any advice you can offer will be greatly appreciated and cherished , plus I get to tell ppl the great Mr D.V. Choose my cam !!!
I'd love to see you port a set of iron 906 casting big block mopar head.
i am shall use these heads on a 545 bbc NA only street engine. Small XR264HR, XR276HR, or XR282HR, or XR288HR, comp cams hydraulic roller cam. Compression matched to cam and pump gas. Performer rpm intake. 2nd gen camaro. Emphasis on fuel economy.
10.200" DECK. 4.570" BORE. 4.150" STROKE. 6.900" ROD. 1.225" Piston. 545 CUBIC INCH.
Dennis, What ever you do just remember the the typical CC BB Chevy cam is on too wide a LCA by a bunch. A 10/1 540 typically will need a LCA with these heads of about 107 degrees.
I would like to find a cheap set of good BBC oval port heads, for my 94 454 engine, it's stock except for the Edelbrock performer rpm, and headers, I was going to swap in a mild cam, but the stock heads would require alot of work. Or different heads, it should be about 330-340 HP. And 490 lbtq, I'd like to get about 50-75 more HP, and keep the TQ, or add to it as well! About 400-450 HP shouldn't be too difficult,
Looking for someone who can port a set of gen 6 bbc heads or has CNC program
Did you know "ultradyne" Harrold Brookshire?
Yes I did. Good cam profile guy according to Harvey Crane and I think he should know!
@@marvingvx1 I'm a bit sad he didn't write any books on his work and his methodologies. Seems like he was one of the few to really try and push the limits and test things from what ive been reading online in the handful of forum posts ive found
Do you do any Mopar heads ?
Is there some kind of technology or procedure that's similar to ExtrudeHone, but, using high flowing dry media on a port that's been blue'd,.......so whenever the blueing is removed, thats where material should be removed?
It would be great if a system exists to flow an abrasive media for however long of a duration to automatically let it port itself to best flow using "active real time computational fluid dynamics"!
Maybe it does, & an F1 secret!!!!
@DV I have a serious question is it possible to do a rear Mount turbo with a draw Tru carb for my SBF I'm building a no prep car for back end racing as you know weight biass is everything well it helps lol I plan on winning dig or die in Rockingham I'm in Western NC have family in Mt Holly sincerely yours Brandon
Brandon, email my web site with your tel #. Do an adequate description of you email IE say I said to do so with your #.
Hey, where can I get those flow balls from?
Thorpedevelopments.com
Test the old bbc pro comp heads.
How about some insight on the parts shortages David and what the solutions are for it in 2022 ?
Been collecting parts for a Super Mouse 454ci SBC Dart M2 Raised cam Tunnel block I am building for a friend with a C4 Corvette Street Racer.
What a nightmare finding parts in 2021 so far. We have 98% parts now, camshaft and lifters and pushrods are left to buy.
Do you have any links to your 454 Super Mouse Mighty Mouse SBC engine ? I am unable to find it online any. It was about 1997-1998 years published in Stock Car Magazine I recall your article.
You also covered the benefits of Titanium valves for Racing use.
I actually went out and ordered bought Titanium Delwest and Manley Titanium valves after reading that article. Used them in my 1970 RAIV Pontiac Trans Am 4-speed it was a Super High Revving Beast 8000+ rpm instant !
8000 eh? Sound like a big bucking bronco.
@@marvingvx1 Yes David. Foot on the floor let It Rev up the Titanium valved Pontiac 455 RAIV 614 casting heads
Vertex OAC Pontiac V8 Magneto no Rev limiter.
Is Eric Weingartner a former porting student of yours DV? I watch his channel also and seems genuinely knowledgeable and good work also.Figured he learned from the Master. Also does widening the short side radius parallel to the valve seat help flow on an intake port?Always good information on this channel no matter what brand or company someone likes,Thanks
No Eric is not a former student but he does seem good at what he does. Yes the porting move you suggest can help but it is far from a slam dunk deal - that is why we have flow benches so we do not have to second guess.
@@marvingvx1 Haven't gotten around to fabricating the Vacuum cleaner basic flow bench in your porting book but always learning more every video you produce and looking forward to a day to attend the porting school possibly when I get the spare money to do so... Until then I can only like subscribe and share with my racing friends and enthusiasts. If folks knew how much youve contributed to the racing and engine building world, every racer in the world should be a subscriber and listening to your wisdom
@@ronnieb7408 I built one out of a 20 year old 5hp shop vac, and used a 4" rubber "fernco" style ABS pipe connector to set the heads on. I have had a load of fun experimenting with SBF heads. Watching and applying all the info DV puts out is like skipping decades of wasted time because you can move right into stuff that works. If it is calling you, set one up. You will be glad you did.
@@ronnieb7408 Thanks for your kind words.
Hi David, I know this is a bit off topic for this video but I have meaning to ask you what you think about the latest designs in cylinder heads using Rotary valves or more like rotary tubes really? Also I remember when I was growing up in Michigan there was a rumor that GM had developed a valve train in which the valves had been opened and closed by electric solenoids, the idea being the ultimate control and adjustability in valve lift,timing, and duration. Thus being the equivalent of having an never ending and always changing combination of what would be the ideal cam shaft profile for every condition. As the story goes GM couldn't figure out a means of generating enough power with the amount of room available to continue with further design and testing. Is there any truth to this story. Do you think the technology exists today to do such a thing? Thanks David, Big fan and cant wait for more 4 valve episodes.
Mr. Noodleman sir, there are companies who have developed workable electronic valve trains but I think this technology will get swamped by electric motors.
DV
@@marvingvx1 Thanks for the reply David, I'm sure you are correct. Thanks again for all of your insight. Big Fan
Liked 👍
Good video, I looked at these heads, but the chambers are too big for me. I’m building a 502 with the stock L29 EFI intake and a Lunati .544 hydraulic roller cam, I am looking at the FloTek 290 heads with 110cc chambers that are basically knock offs of the AFR 290’s but cast, they look good and run around $800 each. It’s going In my Motorhome with a 4L80e transmission, 14 bolt rear with 4.56 gears and 33” tires, so I’d like 600 LBFT of torque as low RPM as possible for towing an enclosed trailer with my race car. Have you seen those heads in a torque based build?
You should use a smaller head.
XOZ you are going the right way here. Small hi-velocity ports will help generate the torque you are looking for. Be sure to get the right spec cam or it will undo all your efforts.
DV
@@marvingvx1 the cam I got was a Lunati High Efficiency Camshafts
Camshaft, Hydraulic Roller Tappet, Advertised Duration 284/292, Lift .534/.544, Chevy, 502, 218, 226 duration at .050, so very mild
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👍👍👍👍
my 7 year old 565ci BBC is pretty weak I guess, 735hp and 675lbft oh well still runs good..
Maybe one day you'll accomplish as many achievements as smokey yunick...
Jarvis, I knew Smokey sort of quite well. I will need to make it to at least 120 years of age to have any chance of equaling his achievements. May god rest his soul.
I feel there’s that potential for petroleum engine.
Maybe a trick carbon nano tube crank that is symbiotic “super conductive” at 4500rpm.
😉
Crappy head. They make ones 400 to 550 cfm
Always good information and porting tips. Thanks