I'm in Australia and most of us only use American or Australian heads for our builds as we want quality and power, plus it costs so much to build an engine here that you want to build it right the first time. I appreciate your work mate.
It's safe to say that we're being b*******t on basically anything we buy. 99% of people aren't gonna be able to check up on it like this dude.It makes such a difference you got somebody like this that knows what they're looking at.
Eric, Thanks for this test. Man, you are right, there just isn't enough of a price delta between these and the AFR's to justify the cost savings. I just got a set of 65cc 195 comp's for my 383 crawler motor. I fully disassembled them, measured, CC'd, etc. Their quality (at least at the time of this typing) is pretty damn good. Like you said, as of right now, the AFR's actually seem like a bargain (PAC springs, good valves, seals, seats, and guide clearances that are actually correct). I don't have any buyers remorse, -and as an added bonus, they have been more than helpful when I called them. My heads were cast at the Edelbrock facility (thanks to me watching one of your other videos), but I have seen firsthand their latest castings from cheener, -and you are right, -they look better than the Edelbrock castings. Cheener has castings down, but their machine work, -quality of the rest of the components, and the lackluster QC at this price point further solidifies my purchase from AFR (machined, assembled with quality components, and QC'd in the USA -and someone who answers a damn phone!). Thanks for all you do, I appreciate it!
I looked at those heads for awhile for my 406 sbc.I ended up going much smaller to AFR 195.Very happy for just $200 more.Great video thanks again.Been waiting for this one.
I watched a video once where they built a 406 sbc and they topped it off with AFR 195 heads and a Performer RPM intake. The engine had a very mild hydraulic roller cam with 230/234 duration. The engine made 540HP and 550TQ. Such an impressive combo for a street-driven deal. You made the right choice my friend.
@@toomanymodz bolting the heads on as we speak.Looking forward to this.Running A Hydraulic cam 240-248 dur on A 580 lift. Compression is 11.44-1 with A Victor jr.Been debating again on passing on this victory and going with the AFR dual plane.Manual transmission.It is A weekend street car.Hmmm I love torque but sacrificing HP when I am shifting at 6300 ish.Would love the send one of the young kids home scratching there heads in there new mustang/Camaro thinking how they lost to an old 68 Camaro.I have no idea what the horse power and torque will be but I would be happy with 450/450.Back in the late 80’s when I bought this car it had A 327 with turbo 350 and 4’11 gears and it was Awsome.I want to see what this sucker will do now.
@@joshuagarvey9362 Yeah I prefer a dual plane on the street. I'm running 240-243 duration with a Performer RPM intake. My car has only a 2800 stall and runs mid 11's. It pulls the driver's tire off the ground, so plenty of torque!
@@joshuagarvey9362 I'm not a betting man, but if I was (I have built plenty of these), if this in fact a 383 or a 406, it should EASILY be North of 550. Have fun man! PS, run good gas, NOTHING less than 92. What is the LSA on that cam? Dual plane on the street FTW.
All bolted on.Some rockers are slightly offset.I am guessing why they gave me 2 peace Gide plates.Definitely takes time to get these set correctly and center.I might just order some that are offset and not have to deal with the 2 peace.I just got done hogging out the Victor jr.It lined up pretty good I am very happy with the porting.I am going to order the AFR dual plane and A set of the 1.6 offset.I have 1.5 now at A 562 lift.Cam says 560 but it’s came out to 562.If I put the 1.6 it will it come out to 601 lift with clearance still good.Going to post A videos of the change over so I can experience what happens.
Great video! Got to appreciate someone who is a straight shooter. I can't believe people actually have the nerve to compare the Promax and AFR heads. I am just a brodix casting guy. I been running them since the 90's and I've always been happy. I tried 2 off brand companies on real budget builds and was real disappointed and never again. I rather buy a cheap brodix or profiler and support American made and have better quality.. I my head guy was backed up and I emailed you 8 months back about a set of 235 head hunter heads and never heads back..
Well, I've been on the fence about buying these exact same heads for a while and was going to get them this week. I won't be putting that order in now,lol. I'm thinking Brodix IK . Thanks for the info 👍
Hey Eric I went over by my engine guys shop yesterday for him to check out this 400 sbc I got I wanted to make sure the block was OK and I was talking about one of your videos and he been building race engines for 56 years and he AL Pitre said you were sharp when it comes to heads he said you were a smart guy I freaked out I've never heard him make complaints like that before so for a guy that been building race engines for 56 years and knows how to make horse power that tells me you are as good as I thought. He built a Lil dz 302 with a set of camel hump heads and a flat tappet cam with only 480 lift make 575 hp. And run a 10 flat in a 3100 lb camaro it broke a NHRA record so he knows some tricks and I know alot of people are going to say no way that motor made that hp. But people also said that about my 427 making 662hp and 605 torque with a 235x241 duration hydraulic roller. Anyway I just wanted to let you know about that complaint AL Pitre gave you. Stay safe and have a great week your friend from Louisiana Rick 427
Eric thanks for all your videos. The numbers you provided are spot on. I flowed a set of 64 cc 225 on my 1020 superflow with same results. The spark plug threads exposed on the heads I have where worse than the ones you showed in your video. I was not happy with the numbers after buying these heads. I also flowed my recently purchased profiler cc ported heads with better results. Thanks for all the great content.
What did you do with the heads? If you kept them what did you do for a work around for the spark plug being longer than the threaded area? Use a shorter threaded spark plug?
The Promaxx 200cc head you flowed a while back are pretty much identical up to .500 lift both intake and exhaust side. From .600 up these 225's are roughly 10-15 cfm better intake side only. Seems like the 200's would make close power with better throttle response all for a few hundred $$ less.
Sir, what's the turnaround time on a head shipped to you to be flowed? Thanks for all the great information you share with us. You're great at communicating useful information, always to the point. It's appreciated. Edit: my apologies. You answered below in another comment. Thanks
You had a set of Pro Maxx heads that flowed some suprising numbers. I could not remember if they were ported or stock. I always learn from your straightforward information
I saw one of the Chinese speedmaster heads where the straight plug version only had about 1.5mm of meat between the spark plug hole and the mating surface of the head, so it was basically single use only.
My first thought was maybe if this head did 325 I might change my AFR 210cc rr heads out. Then again maybe not. Thanks Eric for saving me some time, money, and aggravation.
A question every customer needs to ask himself, when the engine is up and running, was it worth saving a grand on heads to make 25, 50, 100 less horsepower?
Very true, but Like Eric pointed out, it isn't just about the flow numbers or net power potential. There isn't even a grand to be saved on these versus a set of AFR's. It is also about the quality of the rest of the components. An engine is always a big investment (at least if it's done right), and dropping a valve or a seat will certainly cost you more than a set of heads. The parts AFR uses (at least as of right now) are some of the best in the industry and proven. I would hate to grenade a nice block and reciprocating assembly because I saved $550 on a set of heads, -including the power you would be leaving on the table. One word, -NOPE! Thank you Eric!
Had a set come into the shop last year, customer didn't have very many runs on them. The valves were leaking so bad they couldn't get the carb tuned. They thought the engine ran good. After checking the runout on the seats .003 intakes .002 exh wasn't a mystery to me why they couldn't tune the carb well. I was surprised at Pro Max as I have seen their BBC heads and couldn't find any problems other than hardware on cheap side. My SBC runs AFR 210 Eliminator heads, my choice would've been Brodix but little too pricey for the numbers I was going to run.
I had a set of these heads on my kart for a customer bulld when you posted this video. I ran them over to another machine shop and had them flowed and he came up with damn near the same numbers you did, at no point did they break 295 cfm, they were just about 10% below every lift point that was advertised except .400 where it was 20%. I called Promaxx and asked what was going on and the guy pleasantly told me that I flowed them on a 4 inch bore which I hadn`t, he didn`t say send them back or anything of the sort, I dynoed the motor and sure enough it made 600HP on pump gas at 6500 rpm and 577 ft/lbs. with a small hyd roller. My customer was happy which made me relieved. You`re right it aint a bad head but its not a great one. either. I have a question, can they be fixed? or would you have to port them over from scratch?
My biggest worry with chinese anything is the quality. I have seen way to many seats fall out or valves break on them. You truly get what you pay for.....
I worked for what I assume is a now flopped business named procomp based out of Australia. All Chinese parts. their head castings were TERRIBLE, seats fell out, valves broke.....you name it. their electronics were okayish. Their distributors were copies of msd and you could put msd guts in a procomp distributor. For a hot minute all I did for them was rebuild and fix all their returned distributors which was about 2/3 of what they sent out. pos rebuilds were boxed back up and sold to people as new. They hired me to build their crate motors which never happened.
@@picklefart Yeah I remember when the pro comp shit came out, the heads were garbage, saw multiple sets of their rocker arms fail, and I had a PC HEI in an old work truck, it lasted maybe a month and literally exploded, the advance weights went through the side of the cap, that was something else. 😄
@@picklefart I tried one of them distributors, bastard never worked from day one. I didn't waste the effort to send it back, just chalked it up as a loss. I'll never buy anything from Pro Comp again.
There is a head that is a copy of the AFR, appears to be similar or the same as the older 210cc CNC flow numbers. Externally I doubt you'd pick the difference besides the obvious engraving being changed to No-flow, I mean Aeroflow. it is the. Aeroflow 213 cnc head that I'm talking about. put that on your bench, they're about a quarter to a third of the price of AFR here in Australia.
The seal is a preference. The ones you don't like typically have more contact area than the sbi/manley metal clad we all mostly use. I have found that I lose some clearance retainer to seal with those... but they probably do a better job on a street engine of keeping the oil siphoning to a minimum. Jmo. Thanks for sharing.
You do bring up a good point. I have had good and lousy results with both. That seems to be the achille's heel on every SBC, -oil control in the top end. No matter which seal you pick, don't EVER run the seals with the PTFE inserts, -they will wear through valve stems faster than you or I change our socks and underwear 😂
Back cut valves is hidden horsepower, with basic pocket porting and matching porting to at least a 1205 felpro intake gasket for sbc is a decent street build...✌🏻😎💯,P.S. only close chamber heads stay away from factory smog heads....
Brother you need to charge more for that testing. Can you unbox that head, do all the measurements and testing, and box it back up in less than 15-20 minutes? I appreciate all your knowledge and your teacher’s heart, but I also want you to make money!
I appreciate your videos . I been to Tulsa a few times as I use to work for a utility company that has a class there .. I give the cat fish a try if I in the area .. thanks
what about promaxx project X heads 185cc does it match listed flow numbers with the 3/4" intake plate , 4.06" bore and 1&3/4" pipe? it is showing. And how do they compare to their 183cc MaXX series ? didn't know if you have already done these or not. Hey eric thanks soo much for your great works and compilations, it is really helping the people's economy and the world of racing, hot rodding, and cool cars inginuity. You help the world go round and it blesses god. Thanks a ton from all of us, i am sure i speak for them, all of us, also when i say that.
i dont have a huge budget so after seeing some good information I went with Promaxx Project X 185. Now Im worried the flow numbers might not be as theyre showing. have you flowed any Project X heads? sounded like you thought they looked pretty good. what do you think of thsse?
I would like to see a comparison on the casting material strength as to not strip and not warp, etc.... not to mention batch to batch consistency.(even just weight of bare heads). More times than not, product from China will change (for the worse) at time goes on. cutting corners and using tooling far past it's cycle is always a issue to consider. I notice most China products get worse over time, almost never better....
Those blue seals suck for boost applications. The boost comes up the valve stem and push’s them off and those littles around the top of them come off and go thru the motor.
When you flow the heads, do you know if temperature and humidity make much difference and do you have to correct for this? just playing around with my own home made bench and wondered if this is something i need to correct for
@@WeingartnerRacing just kidding. You mentioned the best catfish you ever had. I made a bad joke I guess. Texas Roadhouse had a great catfish meal but they dropped it due to lack of demand. Very disappointed.
Hey Eric , I am building a pro street S10 blazer for a customer with a 383sbc. He bought the 64cc chamber version of those heads. Do you think the 64cc chamber version would flow alittle better then the 72cc? Also this engine will be supercharged with a 10psi torque storm . Your thoughts appreciated. And thank you for sharing your knowledge,with us.,if helps to make the right choices. Wished you lived closer to Maryland..Stay Frosty..
It seems that most people of the world make the mistake of thinking that cylinder head flow is what you look for in a cylinder head. Of course all of the manufacturers know this and therefore want to elevate the values which you clearly illustrated here. You, of course, brought up the big issue with the plug being over exposed, risking preignition but there's another big consideration for me. The way say it is that cylinder head flow does not equate to cylinder filling. Put another way, if you have high flow from a really large valve, compared to a little bit less flow from a much smaller valve, the lower flowing cylinder head with the smaller valve will murder the higher flowing head with a larger valve under many circumstances. I realize there is a point which the lower velocity might help but it will require enough RPM to justify the lower velocity, caused by the using the larger valve. There are a number of equations that I've seen but being a linear equation, the easiest method I use for comparing is simply flow/ valve diameter. Some like to calculate the area of the valve but using the only the diameter will illustrate the differences more easily and quickly. For those that aren't familiar with this method of looking at cylinder heads, it's referred to as the "coefficient of discharge". I've often gone with smaller valves because I wasn't moving enough air to justify the larger ones. This falls along the same lines as people running camshafts that are too big. That's an age-old problem too.
Promaxx 200cc 2.02 64cc 4.030 Bore 240 @ 0.400 270 @ 0.600 On your bench. If you are going to buy Promaxx I don't see the Shockers as being cost effecrive. For the typical under 0.600 flat tappet bracket cam I think the 200 would be a better value for a 355 or 383. But since the Brodix IK 200 (admittedly needs a little more minor cleanup) is no more expensive why buy Chinese?
Many things keep the catfish from becoming popular nationwide. First it is a fish with no scales. So in turn many religions speak against eating it. Secondly the catfish is like a carp. It feeds and mainly resides on the bottom of its waterscape. So there brings with it a muddy taste in the meat. Though I am like you, I like it now that I'm older. My second cousin that was much older than I taught me that if you take carp or catfish and soak the meat in a bowl of salt water for 24 hours it will draw the muddy taste out of the fish. If it were only that easy for things like pond raised lobster.
Hey Eric , Do you think it would have flowed alittle,better numbers if it,was a 64CC chamber vs a 72cc. Just asking your thoughts on it. A customer of mine bought the 64cc version for a 383 supercharged 12psi max motor for street that I am building for a S10 blazer project. Thanks for sharing your knowledge videos.,wish you lived closer to Maryland.,
Pass on the catfish.I have Chrons disease and it just about killed me.My brother took one last ditch effort and put me on A salmon/greens/alkaline water every day diet. Literally every single day. Six months later I put weight back on and got my color back and the doctor said to me you figured it out and he walked out of the room. I am still in shock to this day so grateful for everything.
@@kramnull8962 i would way rather eat a catfish over a carp. I have eaten a few sucker but didnt really like them. A couple that were under 20" werent too bad. You run into issues with bigger ones being full of mercury and they taste like they died a week before you cooked them
Unless managed directly by a non Chinese company (e.g., Honda, Dell, etc.), they cannot deliver consistent quality and/or believable performance specifications.
I'm in Australia and most of us only use American or Australian heads for our builds as we want quality and power, plus it costs so much to build an engine here that you want to build it right the first time.
I appreciate your work mate.
It's safe to say that we're being b*******t on basically anything we buy. 99% of people aren't gonna be able to check up on it like this dude.It makes such a difference you got somebody like this that knows what they're looking at.
This was a great review Eric. One of your best as far as detail. Thanks
Eric, Thanks for this test. Man, you are right, there just isn't enough of a price delta between these and the AFR's to justify the cost savings. I just got a set of 65cc 195 comp's for my 383 crawler motor. I fully disassembled them, measured, CC'd, etc. Their quality (at least at the time of this typing) is pretty damn good. Like you said, as of right now, the AFR's actually seem like a bargain (PAC springs, good valves, seals, seats, and guide clearances that are actually correct). I don't have any buyers remorse, -and as an added bonus, they have been more than helpful when I called them. My heads were cast at the Edelbrock facility (thanks to me watching one of your other videos), but I have seen firsthand their latest castings from cheener, -and you are right, -they look better than the Edelbrock castings. Cheener has castings down, but their machine work, -quality of the rest of the components, and the lackluster QC at this price point further solidifies my purchase from AFR (machined, assembled with quality components, and QC'd in the USA -and someone who answers a damn phone!). Thanks for all you do, I appreciate it!
I looked at those heads for awhile for my 406 sbc.I ended up going much smaller to AFR 195.Very happy for just $200 more.Great video thanks again.Been waiting for this one.
I watched a video once where they built a 406 sbc and they topped it off with AFR 195 heads and a Performer RPM intake. The engine had a very mild hydraulic roller cam with 230/234 duration. The engine made 540HP and 550TQ. Such an impressive combo for a street-driven deal. You made the right choice my friend.
@@toomanymodz bolting the heads on as we speak.Looking forward to this.Running A Hydraulic cam 240-248 dur on A 580 lift. Compression is 11.44-1 with A Victor jr.Been debating again on passing on this victory and going with the AFR dual plane.Manual transmission.It is A weekend street car.Hmmm I love torque but sacrificing HP when I am shifting at 6300 ish.Would love the send one of the young kids home scratching there heads in there new mustang/Camaro thinking how they lost to an old 68 Camaro.I have no idea what the horse power and torque will be but I would be happy with 450/450.Back in the late 80’s when I bought this car it had A 327 with turbo 350 and 4’11 gears and it was Awsome.I want to see what this sucker will do now.
@@joshuagarvey9362 Yeah I prefer a dual plane on the street. I'm running 240-243 duration with a Performer RPM intake. My car has only a 2800 stall and runs mid 11's. It pulls the driver's tire off the ground, so plenty of torque!
@@joshuagarvey9362 I'm not a betting man, but if I was (I have built plenty of these), if this in fact a 383 or a 406, it should EASILY be North of 550. Have fun man! PS, run good gas, NOTHING less than 92. What is the LSA on that cam? Dual plane on the street FTW.
All bolted on.Some rockers are slightly offset.I am guessing why they gave me 2 peace Gide plates.Definitely takes time to get these set correctly and center.I might just order some that are offset and not have to deal with the 2 peace.I just got done hogging out the Victor jr.It lined up pretty good I am very happy with the porting.I am going to order the AFR dual plane and A set of the 1.6 offset.I have 1.5 now at A 562 lift.Cam says 560 but it’s came out to 562.If I put the 1.6 it will it come out to 601 lift with clearance still good.Going to post A videos of the change over so I can experience what happens.
I love how you said that a AFR head will stomp the shit out of the Promax head thanks for being honest your friend from Louisiana Rick 427
Great video! Got to appreciate someone who is a straight shooter. I can't believe people actually have the nerve to compare the Promax and AFR heads. I am just a brodix casting guy. I been running them since the 90's and I've always been happy. I tried 2 off brand companies on real budget builds and was real disappointed and never again. I rather buy a cheap brodix or profiler and support American made and have better quality.. I my head guy was backed up and I emailed you 8 months back about a set of 235 head hunter heads and never heads back..
Sometimes I miss emails.
@@WeingartnerRacing I understand!
Well, I've been on the fence about buying these exact same heads for a while and was going to get them this week. I won't be putting that order in now,lol. I'm thinking Brodix IK . Thanks for the info 👍
Thank you so much for posting- I will buy and send some heads soon
Hey Eric I went over by my engine guys shop yesterday for him to check out this 400 sbc I got I wanted to make sure the block was OK and I was talking about one of your videos and he been building race engines for 56 years and he AL Pitre said you were sharp when it comes to heads he said you were a smart guy I freaked out I've never heard him make complaints like that before so for a guy that been building race engines for 56 years and knows how to make horse power that tells me you are as good as I thought. He built a Lil dz 302 with a set of camel hump heads and a flat tappet cam with only 480 lift make 575 hp. And run a 10 flat in a 3100 lb camaro it broke a NHRA record so he knows some tricks and I know alot of people are going to say no way that motor made that hp. But people also said that about my 427 making 662hp and 605 torque with a 235x241 duration hydraulic roller. Anyway I just wanted to let you know about that complaint AL Pitre gave you. Stay safe and have a great week your friend from Louisiana Rick 427
Regardless what anybody else says I super appreciate your honest opinion and honest numbers thank you
Seeing big numbers advertised on the Promaxx Project X 215cc units. Be curious to see how they stack up.
Nice tidbit about the exposed spark plug edge. Small details like that are typically glossed over and unnoticed by the average hot rodder.
Eric thanks for all your videos. The numbers you provided are spot on. I flowed a set of 64 cc 225 on my 1020 superflow with same results. The spark plug threads exposed on the heads I have where worse than the ones you showed in your video. I was not happy with the numbers after buying these heads. I also flowed my recently purchased profiler cc ported heads with better results. Thanks for all the great content.
What did you do with the heads? If you kept them what did you do for a work around for the spark plug being longer than the threaded area? Use a shorter threaded spark plug?
@@kramnull8962 they make .625 reach plugs or plug washers, what ever works best for you
The Promaxx 200cc head you flowed a while back are pretty much identical up to .500 lift both intake and exhaust side. From .600 up these 225's are roughly 10-15 cfm better intake side only.
Seems like the 200's would make close power with better throttle response all for a few hundred $$ less.
Exactly! The same cfm flow with smaller runners will always be more fun on the street.
Sir, what's the turnaround time on a head shipped to you to be flowed? Thanks for all the great information you share with us. You're great at communicating useful information, always to the point. It's appreciated.
Edit: my apologies. You answered below in another comment. Thanks
As always, great video. And thanks for sharing this detailed information with us.
You had a set of Pro Maxx heads that flowed some suprising numbers. I could not remember if they were ported or stock. I always learn from your straightforward information
I saw one of the Chinese speedmaster heads where the straight plug version only had about 1.5mm of meat between the spark plug hole and the mating surface of the head, so it was basically single use only.
My first thought was maybe if this head did 325 I might change my AFR 210cc rr heads out. Then again maybe not. Thanks Eric for saving me some time, money, and aggravation.
Been waiting to see you do these
Thanks for sharing! I was hoping you'd be able to test Promaxxes CNCed heads
A question every customer needs to ask himself, when the engine is up and running, was it worth saving a grand on heads to make 25, 50, 100 less horsepower?
Very true, but Like Eric pointed out, it isn't just about the flow numbers or net power potential. There isn't even a grand to be saved on these versus a set of AFR's. It is also about the quality of the rest of the components. An engine is always a big investment (at least if it's done right), and dropping a valve or a seat will certainly cost you more than a set of heads. The parts AFR uses (at least as of right now) are some of the best in the industry and proven. I would hate to grenade a nice block and reciprocating assembly because I saved $550 on a set of heads, -including the power you would be leaving on the table. One word, -NOPE! Thank you Eric!
Hope you're having a great day, Sir! Thanks for sharing your knowledge with us. o7
Had a set come into the shop last year, customer didn't have very many runs on them. The valves were leaking so bad they couldn't get the carb tuned. They thought the engine ran good. After checking the runout on the seats .003 intakes .002 exh wasn't a mystery to me why they couldn't tune the carb well. I was surprised at Pro Max as I have seen their BBC heads and couldn't find any problems other than hardware on cheap side. My SBC runs AFR 210 Eliminator heads, my choice would've been Brodix but little too pricey for the numbers I was going to run.
Great video Eric, thanks for sharing.
I had a set of these heads on my kart for a customer bulld when you posted this video. I ran them over to another machine shop and had them flowed and he came up with damn near the same numbers you did, at no point did they break 295 cfm, they were just about 10% below every lift point that was advertised except .400 where it was 20%. I called Promaxx and asked what was going on and the guy pleasantly told me that I flowed them on a 4 inch bore which I hadn`t, he didn`t say send them back or anything of the sort, I dynoed the motor and sure enough it made 600HP on pump gas at 6500 rpm and 577 ft/lbs. with a small hyd roller. My customer was happy which made me relieved. You`re right it aint a bad head but its not a great one. either. I have a question, can they be fixed? or would you have to port them over from scratch?
Can’t be ported more. It would better to do the project x heads.
My biggest worry with chinese anything is the quality. I have seen way to many seats fall out or valves break on them. You truly get what you pay for.....
Really? Anything like the Chrysler 4.7, 3.7, 5.7?
I worked for what I assume is a now flopped business named procomp based out of Australia. All Chinese parts. their head castings were TERRIBLE, seats fell out, valves broke.....you name it. their electronics were okayish. Their distributors were copies of msd and you could put msd guts in a procomp distributor. For a hot minute all I did for them was rebuild and fix all their returned distributors which was about 2/3 of what they sent out. pos rebuilds were boxed back up and sold to people as new. They hired me to build their crate motors which never happened.
@@picklefart
Yeah I remember when the pro comp shit came out, the heads were garbage, saw multiple sets of their rocker arms fail, and I had a PC HEI in an old work truck, it lasted maybe a month and literally exploded, the advance weights went through the side of the cap, that was something else. 😄
Everything is made in China
@@picklefart I tried one of them distributors, bastard never worked from day one. I didn't waste the effort to send it back, just chalked it up as a loss. I'll never buy anything from Pro Comp again.
Now the question is, Why is the as Cast 200cc so good and the CNC 225 so bad????
There is a head that is a copy of the AFR, appears to be similar or the same as the older 210cc CNC flow numbers. Externally I doubt you'd pick the difference besides the obvious engraving being changed to No-flow, I mean Aeroflow. it is the. Aeroflow 213 cnc head that I'm talking about. put that on your bench, they're about a quarter to a third of the price of AFR here in Australia.
The seal is a preference. The ones you don't like typically have more contact area than the sbi/manley metal clad we all mostly use. I have found that I lose some clearance retainer to seal with those... but they probably do a better job on a street engine of keeping the oil siphoning to a minimum. Jmo. Thanks for sharing.
You do bring up a good point. I have had good and lousy results with both. That seems to be the achille's heel on every SBC, -oil control in the top end. No matter which seal you pick, don't EVER run the seals with the PTFE inserts, -they will wear through valve stems faster than you or I change our socks and underwear 😂
Great video! Thanks again Eric!
Hey Eric,
So with those flow numbers how much more duration would you run on the exhaust to compensate? Thanks Dennis ✌️
Back cut valves is hidden horsepower, with basic pocket porting and matching porting to at least a 1205 felpro intake gasket for sbc is a decent street build...✌🏻😎💯,P.S. only close chamber heads stay away from factory smog heads....
They call for the big ass 1206 felpro gaskets
Good to know. Thanks Eric.
What's the best afr head for a blown street strip 350 sbc ?
Love your videos
Brother you need to charge more for that testing. Can you unbox that head, do all the measurements and testing, and box it back up in less than 15-20 minutes? I appreciate all your knowledge and your teacher’s heart, but I also want you to make money!
I appreciate your videos . I been to Tulsa a few times as I use to work for a utility company that has a class there .. I give the cat fish a try if I in the area .. thanks
what about promaxx project X heads 185cc does it match listed flow numbers with the 3/4" intake plate , 4.06" bore and 1&3/4" pipe? it is showing. And how do they compare to their 183cc MaXX series ? didn't know if you have already done these or not. Hey eric thanks soo much for your great works and compilations, it is really helping the people's economy and the world of racing, hot rodding, and cool cars inginuity. You help the world go round and it blesses god. Thanks a ton from all of us, i am sure i speak for them, all of us, also when i say that.
I’m still waiting to get a set to test. When I do I will make a video.
Superflow is the industry standard, and the numbers I'd be using.
Do you think these heads would do ok with some boost? Maybe 15lbs with a turbo setup?
Great video!
Thanks for info I payed $1200 for new set back in 2020
Looks like pretty good heads but they need some r&d on the cnc program
I was thinking those flow numbers they advertised seemed alittle optimistic. What's the price on them CNCd 225s?
i dont have a huge budget so after seeing some good information I went with Promaxx Project X 185. Now Im worried the flow numbers might not be as theyre showing. have you flowed any Project X heads? sounded like you thought they looked pretty good. what do you think of thsse?
I would like to see a comparison on the casting material strength as to not strip and not warp, etc.... not to mention batch to batch consistency.(even just weight of bare heads). More times than not, product from China will change (for the worse) at time goes on. cutting corners and using tooling far past it's cycle is always a issue to consider. I notice most China products get worse over time, almost never better....
Hello Eric, Could you please explain how you would fit a set of headers to the the exhaust ports (10.13+ vid time) on these heads. Thank you.
Those blue seals suck for boost applications. The boost comes up the valve stem and push’s them off and those littles around the top of them come off and go thru the motor.
Wonder if anyone goes back and looks at comments.
Go look at the new 215 promaxx project C heads he tests. They flow more than these.
Did you flow the edelbrock 210?
Do you ever do port designs and or work on sbc superstock heads?
You ever flow a CNC 220 Flotek head? 320 @ .700 supposedly
All Ferrera Valves have the part number on the valve stem. If they don't, send them back to where they came from.
Valves in the last 2 years or so do not always have them. In fact I'd say it's only old stock ones that do.
Those ports are so big, you could fit 3 fingers in there! Wait ..."shocker" heads?🤔🤣🤣🤣
Great info on that head!
I know you don't port iron heads, would you flow one?
Yes
Hi Eric
What would you suggest would be the best head to use on a LS 434 with a supercharger or NA
good use of those free flash lights lol
When you flow the heads, do you know if temperature and humidity make much difference and do you have to correct for this? just playing around with my own home made bench and wondered if this is something i need to correct for
On an orfice bench you don’t have to. However my shop is climate controlled.
Great information
How do they compare to the Brodix they copy?
Hi Eric I have PRC 225 Heads do you have a Video of them ,,,,,,I thought I was buying some of thee BesT
I have only seen them at the trade shows. They look good. Someday I will get a set through the shop.
Eric How do you measure and calculate the area above the short side?
It’s usually rectangular in shape so length times width at apex then remove corner radius. For ease I didn’t remove corner radius for video.
@@WeingartnerRacing Thanks!
Have you checked the Brodix IK-200 64cc heads ?
Yes they are in a different video.
Can you A flow test on the AFR enforcer cylinder heads 195
I did a video on it. You just have to search.
Does this head have raised exhaust port?
Whats the best size primary for a 421? 13.5 ps. Thank you!
What were the flow numbers for the catfish?
What
@@WeingartnerRacing just kidding. You mentioned the best catfish you ever had. I made a bad joke I guess. Texas Roadhouse had a great catfish meal but they dropped it due to lack of demand. Very disappointed.
Before seeing the numbers i am thinking that 325cfm is lots from a 225cc port.
Is this part number 2121 ?
Hey Eric I am building a pro street S10 blazer for a customer . he bought the same,225cc shocker head but in a 64cc chamber. Do you think the 64cc
Hey Eric , I am building a pro street S10 blazer for a customer with a 383sbc. He bought the 64cc chamber version of those heads. Do you think the 64cc chamber version would flow alittle better then the 72cc? Also this engine will be supercharged with a 10psi torque storm . Your thoughts appreciated. And thank you for sharing your knowledge,with us.,if helps to make the right choices. Wished you lived closer to Maryland..Stay Frosty..
The Chinese heads have seats in them that remind me of the Yamaha ATVs. Very similar 🤔
Marys Grill?
Yes, have you eaten there?
It seems that most people of the world make the mistake of thinking that cylinder head flow is what you look for in a cylinder head. Of course all of the manufacturers know this and therefore want to elevate the values which you clearly illustrated here. You, of course, brought up the big issue with the plug being over exposed, risking preignition but there's another big consideration for me. The way say it is that cylinder head flow does not equate to cylinder filling. Put another way, if you have high flow from a really large valve, compared to a little bit less flow from a much smaller valve, the lower flowing cylinder head with the smaller valve will murder the higher flowing head with a larger valve under many circumstances. I realize there is a point which the lower velocity might help but it will require enough RPM to justify the lower velocity, caused by the using the larger valve. There are a number of equations that I've seen but being a linear equation, the easiest method I use for comparing is simply flow/ valve diameter. Some like to calculate the area of the valve but using the only the diameter will illustrate the differences more easily and quickly. For those that aren't familiar with this method of looking at cylinder heads, it's referred to as the "coefficient of discharge".
I've often gone with smaller valves because I wasn't moving enough air to justify the larger ones. This falls along the same lines as people running camshafts that are too big. That's an age-old problem too.
How long is the turn around for flow testing?
Maybe a week.
Promaxx 200cc 2.02 64cc
4.030 Bore
240 @ 0.400
270 @ 0.600
On your bench.
If you are going to buy Promaxx I don't see the Shockers as being cost effecrive. For the typical under 0.600 flat tappet bracket cam I think the 200 would be a better value for a 355 or 383.
But since the Brodix IK 200 (admittedly needs a little more minor cleanup) is no more expensive why buy Chinese?
Good stuff.......
What's your favorite sbc head?
American
Will sleep better at night with AFR
I just got mine in the mail and I put them in the bed next to me.Your right I had the best sleep of my lift.Content.
you only charge $30 for a test and evaluation? Seems really cheap to me even without the video.
$30 to Flowbench a cylinder head, U should advertise this every time you talk imho.? Food for thought...
Yep don't like the spark plug area also
Fun
So buy AFR heads
Understand not using a pipe on the exhaust. Who knows the size and the angles
Moral of the story... if they copied a Brodix, just buy the Brodix.
add Nitrous or blower
I cannot believe you will flow a head for 30 bucks. My local engine builder wants $700
I would be rich if I charged that but $30 is for one cylinder.
They are comparing apples & oranges.
👍🏽🇺🇸👍🏽
Trick Flow would spank it
Disappointed with the exhaust flow. I've seen better out of a modified stock cast iron SBC
😲
Everyone always bashed be for eating catfish. Its a tasty chunk of meat, why wouldnt you eat it?
Many things keep the catfish from becoming popular nationwide. First it is a fish with no scales. So in turn many religions speak against eating it.
Secondly the catfish is like a carp. It feeds and mainly resides on the bottom of its waterscape. So there brings with it a muddy taste in the meat.
Though I am like you, I like it now that I'm older. My second cousin that was much older than I taught me that if you take carp or catfish and soak the meat in a bowl of salt water for 24 hours it will draw the muddy taste out of the fish.
If it were only that easy for things like pond raised lobster.
Hey Eric , Do you think it would have flowed alittle,better numbers if it,was a 64CC chamber vs a 72cc. Just asking your thoughts on it. A customer of mine bought the 64cc version for a 383 supercharged 12psi max motor for street that I am building for a S10 blazer project. Thanks for sharing your knowledge videos.,wish you lived closer to Maryland.,
Pass on the catfish.I have Chrons disease and it just about killed me.My brother took one last ditch effort and put me on A salmon/greens/alkaline water every day diet. Literally every single day. Six months later I put weight back on and got my color back and the doctor said to me you figured it out and he walked out of the room. I am still in shock to this day so grateful for everything.
@@kramnull8962 i would way rather eat a catfish over a carp. I have eaten a few sucker but didnt really like them. A couple that were under 20" werent too bad. You run into issues with bigger ones being full of mercury and they taste like they died a week before you cooked them
Unless managed directly by a non Chinese company (e.g., Honda, Dell, etc.), they cannot deliver consistent quality and/or believable performance specifications.
725 uh nahhh
If you love your engine you'll pass on Chinese heads
So, flat-out false advertising!!
Don't buy Chinese