now this type of testing is often negected. it demonstrates the quality of work that you do. thank you for this video. people would normally have to pay a lot extra or a pro-stock porter for this kind of data. great work.
about 20 years ago my engine builder, did a very mild bowl blend, unshrouded the valves (minimally), cleaned up rough casting, and gasket matched the ports on both the intake manifold and head. I often wonder if he helped or hurt my brrand new at the time AFR 210 CC RR heads... i was shocked to hear he did this to new set of heads but he said they had a lot of rough casting material. he didnt charge me because much (like 200). what do you think?
I like and all comment on most all your videos that I've watched so far, and try to share them hopefully it helps. I feel it's the least we can do for the invaluable info/data you share. I'm a Data nerd so I love this stuff and absorb every bit of it I can. As always, Thanks for sharing Eric. I did give your channel/content a shout-out in 1 of the SBC groups, there's some knowledgeable ppl in these groups and there's many that can benefit from channels like yours.
A lot of this is going over my head (all the numbers etc, but the small differences that change the outcome, like the lips inside the chamber, and the differences in flow, very interesting, all the best to you and your loved ones
I wish you put out more videos as you are my favorite RUclipsr at the moment. I don’t know what it is about you that I enjoy so much. Maybe your honesty? Your rants? I don’t know I haven’t figured it out yet.
Put the head on a block with the 4.155 bore(of course with nothing in in the block!) and turn it upside down and look at how the chamber lines up with the bores. I know this can be done with a gasket but you don’t get the same picture. Just a thought. Thanks for the great videos.
Wow that's alot of information. Don't know where ya find the time. Was waiting on this video. Ya did a great job, thanks. Also I found the head bolt hole sleeves. Years ago we had to pretty much make our own but easy to get now. Good luck with your procedure!
Great job ERIC with providing all those figures. Once you do get this on the mule. Pay close attention to the performance gain with the 90% throat and 95% bowl. I'll bet you that intake flow numbers and those swirl stall is directly related to those % percentages. While the reverse will be true with the exhaust flow. That swirl stumble is the transition for low lift build up in the bowl area and the switch to inline flow as lift increases. Having a bigger throat will lower the swirl a tiny bit but will increase the flow sooner in the lift range while maintaining swirl. As you will notice as soon as you add a valve job and seat clean up.
Thanks Eric for all the great info-looking forward to seeing the dyno results. I’m actually impressed that an as-cast 195-ish head flows as well as this one does. I’m thinking you should see around 550 hp before doing anything except assembly. I guess your goal is to prove/disprove various assumptions about what works and what doesn’t. It would be interesting to just see the progression of the power and torque as you make the mods to heads and intake. Waiting impatiently…
Looks like a okay head. We just picked up a set of these for my friends small block 350 with a wieand 142 blower on it.looks like they will work just fine.. i cant wait to see how good you make these heads and how much power you can get out of them
That's a pretty good head for the money. With A good valve job and minimal port work they would probably approach 300 cfm mark . The flow tech sbc heads are very similar casting.
I noticed on the flow graph that one intake runner flowed much like the others, then at around .600", it seemed to just level out, while the others continued to gain. Looking at your flow sheet, it looks like that may have been cyl 2. I'm curious as to why that runner may have done that. At the end, the program you use to get the estimated hp/tq is really cool.
Dud! What the hell! You going to start handing out free heads to? You are really going over this stuff big time. I look over the stuff you were talking about. Ok the crazy thing. Can you get them all to pull the same and push the same? If you can will it change the spin in the end? When you run this on your mull can you see the change in all rpm range or just at the top end? The other thing is how much power is all this going to improve the motor? Good luck with this and I really want to see how this all works out. The funny thing is just one part can change everything.
I am not going to spend countless hours trying to get everything to flow and do the exact same. As a matter of fact at some point I'm going to only port some cylinders.
I want to see how they come out when you do your magic on them and port them because if they come out like I'm hoping they will and can flow as good as a set of afr 220s out the box I'm going to get a set and have you port them I'm going to start collecting part to build a 406 or 421 nit sure yet I do know I'm going to buy a dart block and more then likely a scat rotating assembly from skip white. I can't Waite so see what you do to these heads and the numbers. Thanks for the video. Your friend from Louisiana Rick 427 will flow as good as the afr 220s
Never thought AFR would make deals with China. I wonder what kind of inspection AFR gives them before they ship to customers? They look so nice I forget they are made in China.
You would be blown away with the number of companies using chinese castings. In fairness AFR uses an American foundry and Chinese foundry. I can sadly tell you the Chinese foundry heads are superior to the American heads in every aspect and don't have near the failures as the American.
@@WeingartnerRacing On a side note, I just watched a video about stock repro wheels that are made in the US, and the vendor now imports aluminum wheels cast in a similar style because the QC is so poor on the US made wheels. This is just sad, but obviously the buyer is not going to put up with an inferior product, even if it s made at home. Weird times.
Do you ever have customers tell you about exhaust valve to piston clearance issues with the AFR exhaust valves. Because the exhaust valves in my AFR heads are incredibly thick and was causing piston valve clearance issues on the exhaust only.
When reverse flowing did you put a radius on the entry? Just for reference. Also most of the machining variances were within 2%, most would consider that good.
@@WeingartnerRacing I thought it might be intentional. Leaving the chambers big is safer when people don't check things. There are probably more people that don't check things at this price point. That's not an insult or criticism. I do think it's reality. I suspect the designer of this head chose to go a little big on the chambers because of it.
This is a little off the path but I think a good question. Are any of the race ready cast or fast as cast heads any good? I cant see a cast head ever being as good as a good cnc head with the same volume.
do you know when swirl gets too high or fast? I would think at some point it would act as a centrifuge as pull fuel vapor out of suspension washing cylinder walls
I recently did flowed a Nascar head . One of strongest in field 2019 or so , so pretty recent. The swirl is ASTONISHING HIGH. For me that ended the everlasting discussion about a few percentage more or less swirl or flow bla bla.. As I consider a 5.8 litres capacity engine generating 920 hp with 850 holley carb pretty darn good. The man who built my flowbench said , regarding Nascar engines : if the choice is 3 percent more flow and 10 percent less swirl or 3 percent less flow and 10 percent more swirl you know the answer now ...
the sportsmanII's were an okay head out of the box back 30 years ago, and for a cast iron head they are pretty danged good after you do some work on them. unless you just have to go with an iron head, a modern aluminum head is going to be a better choice. make no mistake, a worked over sportsman II head is no joke, but there are better choices for the dollar.
A company like AFR is likely not going to offer a chinese casted part unless the chinese foundry can meet their quality standards. Also, AFR likely has a pre-machining inspection process on the castings so they dont wastes hours of machiniing time on a bad casting.
Sounds good. I wish it were true. I don't know that it isn't, because AFR only tells me they are assembled in house. I take that to mean they are not machined in house. I also take the lack of response to my QC questions to mean they take the heads as they come, QC or no QC. That doesn't mean these are bad, they are good for the money. But, don't kid yourself about what you are getting here.
AFR does a really good quality check on the heads but they are not sizing the guides or doing the valve job on the enforcer heads. PS I did check them and they were good.
@@WeingartnerRacing I checked a pair also. The clearances were good. The chambers were 68ish cc. I did mill them. They run fine, maybe not as strong as hoped on a 383.
@@WeingartnerRacing they definitely look like a really good deal to be honest and with a little bit of work you might be able to match the CNC head for a lot less money
Eric if that 406 engine makes 570 lbft..... Thats greater than 1.40 lbft per CI OMG Most youtube "engine builders" are Fat & Happy with 1.25 lbft per CI.
now this type of testing is often negected. it demonstrates the quality of work that you do. thank you for this video. people would normally have to pay a lot extra or a pro-stock porter for this kind of data. great work.
about 20 years ago my engine builder, did a very mild bowl blend, unshrouded the valves (minimally), cleaned up rough casting, and gasket matched the ports on both the intake manifold and head. I often wonder if he helped or hurt my brrand new at the time AFR 210 CC RR heads... i was shocked to hear he did this to new set of heads but he said they had a lot of rough casting material. he didnt charge me because much (like 200). what do you think?
It is a lot of work but when its all done we should see some trends with the data I hope.
I like and all comment on most all your videos that I've watched so far, and try to share them hopefully it helps. I feel it's the least we can do for the invaluable info/data you share.
I'm a Data nerd so I love this stuff and absorb every bit of it I can. As always, Thanks for sharing Eric. I did give your channel/content a shout-out in 1 of the SBC groups, there's some knowledgeable ppl in these groups and there's many that can benefit from channels like yours.
These are some of my favorite videos! Thanks for breaking it down and sharing with us!
Thanks
OMG Eric..... You have been Blessed with the Spirit of David Vizard. You Sir are the Messiah of Cylinder Heads.....Woo Hoo !!!!
Thats some dedication. Alot of work!
Very interesting as always
A lot of this is going over my head (all the numbers etc, but the small differences that change the outcome, like the lips inside the chamber, and the differences in flow, very interesting, all the best to you and your loved ones
I wish you put out more videos as you are my favorite RUclipsr at the moment. I don’t know what it is about you that I enjoy so much. Maybe your honesty? Your rants? I don’t know I haven’t figured it out yet.
I bet its the rants because people love those. Thats sarcasm they actually hate them.
@@WeingartnerRacing maybe I enjoy them because I agree with what you are saying? I have no idea. Stay out of the pool!
It would be cool to see if blending the bowls makes the ports flow more consistent to each other.
From my experince it will for sure.
It will be one of the tests I do to see how much flow and power it makes on the dyno.
Put the head on a block with the 4.155 bore(of course with nothing in in the block!) and turn it upside down and look at how the chamber lines up with the bores. I know this can be done with a gasket but you don’t get the same picture. Just a thought. Thanks for the great videos.
Thanks for your time and knowledge. Always appreciated
Air flow speeds just testing one cylinder would be interesting . Thanks for the videos
I may do it on this head because it is still on the bench.
Wow that's alot of information. Don't know where ya find the time. Was waiting on this video. Ya did a great job, thanks. Also I found the head bolt hole sleeves. Years ago we had to pretty much make our own but easy to get now. Good luck with your procedure!
Thanks
Great job ERIC with providing all those figures. Once you do get this on the mule. Pay close attention to the performance gain with the 90% throat and 95% bowl. I'll bet you that intake flow numbers and those swirl stall is directly related to those % percentages. While the reverse will be true with the exhaust flow. That swirl stumble is the transition for low lift build up in the bowl area and the switch to inline flow as lift increases. Having a bigger throat will lower the swirl a tiny bit but will increase the flow sooner in the lift range while maintaining swirl. As you will notice as soon as you add a valve job and seat clean up.
I'd say the csa and the area directly below the valve and how even the surfaces are make the biggest difference
Thanks Eric for all the great info-looking forward to seeing the dyno results. I’m actually impressed that an as-cast 195-ish head flows as well as this one does. I’m thinking you should see around 550 hp before doing anything except assembly. I guess your goal is to prove/disprove various assumptions about what works and what doesn’t. It would be interesting to just see the progression of the power and torque as you make the mods to heads and intake. Waiting impatiently…
Looks like a okay head. We just picked up a set of these for my friends small block 350 with a wieand 142 blower on it.looks like they will work just fine.. i cant wait to see how good you make these heads and how much power you can get out of them
They should do good.
That's a pretty good head for the money. With A good valve job and minimal port work they would probably approach 300 cfm mark . The flow tech sbc heads are very similar casting.
The flowtech heads I have seen are not the same head.
Those look like the Assault racing castings on my 383. Mine are very close to 300 cfm through a 2.02 valve ported to a Felpro 1255.
Eric I always thought Brownfield heads from way back and Sperling combined. Brownfield having the foundry and Sperling making the air move.
I noticed on the flow graph that one intake runner flowed much like the others, then at around .600", it seemed to just level out, while the others continued to gain. Looking at your flow sheet, it looks like that may have been cyl 2. I'm curious as to why that runner may have done that. At the end, the program you use to get the estimated hp/tq is really cool.
Dud! What the hell! You going to start handing out free heads to? You are really going over this stuff big time. I look over the stuff you were talking about. Ok the crazy thing. Can you get them all to pull the same and push the same? If you can will it change the spin in the end? When you run this on your mull can you see the change in all rpm range or just at the top end? The other thing is how much power is all this going to improve the motor? Good luck with this and I really want to see how this all works out. The funny thing is just one part can change everything.
I am not going to spend countless hours trying to get everything to flow and do the exact same. As a matter of fact at some point I'm going to only port some cylinders.
Eric would you recommend buying these heads assembled or bare?
I want to see how they come out when you do your magic on them and port them because if they come out like I'm hoping they will and can flow as good as a set of afr 220s out the box I'm going to get a set and have you port them I'm going to start collecting part to build a 406 or 421 nit sure yet I do know I'm going to buy a dart block and more then likely a scat rotating assembly from skip white. I can't Waite so see what you do to these heads and the numbers. Thanks for the video. Your friend from Louisiana Rick 427
will flow as good as the afr 220s
Most likely they will flow more when done.
Great info
Thanks
Never thought AFR would make deals with China. I wonder what kind of inspection AFR gives them before they ship to customers? They look so nice I forget they are made in China.
You would be blown away with the number of companies using chinese castings. In fairness AFR uses an American foundry and Chinese foundry. I can sadly tell you the Chinese foundry heads are superior to the American heads in every aspect and don't have near the failures as the American.
@@WeingartnerRacing On a side note, I just watched a video about stock repro wheels that are made in the US, and the vendor now imports aluminum wheels cast in a similar style because the QC is so poor on the US made wheels. This is just sad, but obviously the buyer is not going to put up with an inferior product, even if it s made at home. Weird times.
Cool stuff
What do you recommend to do on the heads?
Do you ever have customers tell you about exhaust valve to piston clearance issues with the AFR exhaust valves. Because the exhaust valves in my AFR heads are incredibly thick and was causing piston valve clearance issues on the exhaust only.
I would consider 2CC or less variance as being good.
me too.
You say only profiler and brodix cast their own heads what about edelbrock?Thanks
When reverse flowing did you put a radius on the entry? Just for reference.
Also most of the machining variances were within 2%, most would consider that good.
No radius when flowing in reverse.
swirl might be influenced by port bias, or lack there of. also vain and /or turbulence blocking high velocity outside path of port?
It might be or the chamber design.
Just caught a glimpse but, when going over the flow sheets, is that an aluminum caddillac head to the left on the floor?
Yes
This is why you get them bare, and the guy who does cc on the heads gets way better numbers an much closer on port matching.
Eric Weingartner, how will u know if a particular cylinder has valve float other than monitoring egt?
I will be taking the heads apart after almost every test session so I will see signs. Also it shows up in power.
Your program estimates 112% volumetric efficiency?
Thanks for the video
I think the program is shooting way high on that somehow.
@@WeingartnerRacing I thought it might be intentional. Leaving the chambers big is safer when people don't check things. There are probably more people that don't check things at this price point.
That's not an insult or criticism. I do think it's reality. I suspect the designer of this head chose to go a little big on the chambers because of it.
This is a little off the path but I think a good question.
Are any of the race ready cast or fast as cast heads any good? I cant see a cast head ever being as good as a good cnc head with the same volume.
The promaxx project x 215 flows more than several cnc ported heads, some at about the same size.
do you know when swirl gets too high or fast? I would think at some point it would act as a centrifuge as pull fuel vapor out of suspension washing cylinder walls
I recently did flowed a Nascar head . One of strongest in field 2019 or so , so pretty recent. The swirl is ASTONISHING HIGH. For me that ended the everlasting discussion about a few percentage more or less swirl or flow bla bla.. As I consider a 5.8 litres capacity engine generating 920 hp with 850 holley carb pretty darn good.
The man who built my flowbench said , regarding Nascar engines : if the choice is 3 percent more flow and 10 percent less swirl or 3 percent less flow and 10 percent more swirl you know the answer now ...
I have heard of that.
What do you think about the afr 335cc bbc enforcer heads?
I’m not aware of a 335 enforcer but I have done a video of the 325cc enforcer
Hey Eric,
in your opinion, what's the best street head? 406 SBC and how do the old sportsman 2 heads compare to what's available today.
Thanks
AFR 195 Competition ported out of the box or one of my ported AFR heads if you want custom. Sportsman II are not in the same league.
the sportsmanII's were an okay head out of the box back 30 years ago, and for a cast iron head they are pretty danged good after you do some work on them. unless you just have to go with an iron head, a modern aluminum head is going to be a better choice. make no mistake, a worked over sportsman II head is no joke, but there are better choices for the dollar.
How much horsepower do you think you could make with a set of those out of the box?
It made 565hp on the dyno mule.
How's that Chinese valve job look
It sealed but not the greatest
A company like AFR is likely not going to offer a chinese casted part unless the chinese foundry can meet their quality standards. Also, AFR likely has a pre-machining inspection process on the castings so they dont wastes hours of machiniing time on a bad casting.
Sounds good. I wish it were true. I don't know that it isn't, because AFR only tells me they are assembled in house. I take that to mean they are not machined in house. I also take the lack of response to my QC questions to mean they take the heads as they come, QC or no QC. That doesn't mean these are bad, they are good for the money. But, don't kid yourself about what you are getting here.
AFR does a really good quality check on the heads but they are not sizing the guides or doing the valve job on the enforcer heads. PS I did check them and they were good.
@@WeingartnerRacing I checked a pair also. The clearances were good. The chambers were 68ish cc. I did mill them. They run fine, maybe not as strong as hoped on a 383.
Cylinder 8 flows 277 after some work they actually look like a nice head
Pretty good for what it is. I thought about asking AFR to send an AFR 195 street cnc ported head to compare against.
@@WeingartnerRacing they definitely look like a really good deal to be honest and with a little bit of work you might be able to match the CNC head for a lot less money
is this the 600$ head?
yes
Eric if that 406 engine makes 570 lbft..... Thats greater than 1.40 lbft per CI OMG Most youtube "engine builders" are Fat & Happy with 1.25 lbft per CI.