Thanks for sharing this information about these heads. Lots of guys who can’t afford the big money heads buy heads like these and we have to fix them. Thanks for sharing your knowledge and experience with us.
Its like this , any head will flow with the right porting.. CNC porting is the best. but most cheap heads wont last , cheap castings poor quality non heat treated aluminum bolt hole threads strip out like junk...
Idk. I bought a used pair off ebay. The pro headers brand and put on my 357. Now I just changed the springs and put them on the person I got them from might of had them worked. I also put 1.6 roller rockers and a performer rpm intake on instead of the single plane that was on it. The bottom end is .040 over flat tops comp 280h magnum camshaft and it had some junkyard smog heads on it. Way wore out. The bottom end was built by Dale Smith which is a very reputable machinist but the top end was just thrown together with stock stuff and a single plain intake. Was like that when I got the truck. Anyway seat of the pants feel I would say 75 more horse easily. Exactly what the bottom end needed. I'm really pleased with the heads and they've been on the truck over 2 years now.
Awesome video, at least for me . just got the head for a 355 build.talk about timing.not everyone can afford the "good stuff" but we are trying? Thanks again for us little guys 😀😀
I understand that there are some decent heads coming out of India, I've seen one set for a BBC and I think they were called Liberty heads but don't hold me to that.
I have personally hand Ported a set of the aluminium CAL-Flow 200cc heads, which are also a copy of the Dart Pro-1 200cc head. Mine were a set of Angle plug heads. I left the factory 3angle valve seats alone and only checked that were good, suprisingly they were, anyway i used 2.02in and 1.6exh valves, but I did open up the throat, bowl size, and done extensive full port. Pushrod pinch was set at 1.050" I could have gone bigger. Port matched to 1206 gaskets. On a std 4" bore small block, with a 383 crank for 379ci and using a 3310 vac sec Holley, ported professional products single plane, 1-3/4 headers, Ran 11's at 118 for the 1/4 mile with, th-400 and 9" with 3.00:1 diff gears, weight of approx 3400lbs including full length dual exhaust with mufflers on D.O.T street tires driven to the track. Could only leave off the foot brake at idle, anymore and it would smoke the tires to half track.
3400 lbs , freeway gears street tires & mufflers small block chev. & A horse power robbing TH400 & 118 mph ! They must of gave you the slip for the other car .
@@martinkobert4321 sometimes you'll run across people that can do shit that you can't. I wouldn't spend too much time worrying about it. Just the way it is.
I have to wonder how many American head companies are having their castings done in China or elsewhere ? I work for a Piston Ring Foundry in Michigan , 23 years now , (formerly Federal Mogul ) , and we were having rings come in cast in India years ago . The rings were such bad quality with porosity like never seen before , we had to re-melt them and do them ourselves . Sadly , Tenneco automotive bought Federal Mogul , and about 7 months ago they announced all piston rings will be made in Germany and India as of July , and our plant is all done . I have also seen Edelbrock stuff for sale at parts stores that say made in China , right on the boxes . Hooker headers has their stuff made in Mexico , the list just goes on , sad but true .
These exact heads are being sold by both AFR as the enforcers and by blueprint as well as others.. I'd say a lot of american head companies are offering chinese casting as cost effective options mainly because its catching on that the chinese heads have been improving in quality and because they want to have a cost effective option for those budget minded customers.
It's funny, you said you building an engine for your Sister, my sister always had enough engine but never enough brakes every stop was a panic stop. The girl is 59 years old and still scares the hell out of everyone...LOL
What do you think about the ProMaxx heads? I’ve got a set of their 195 cc angle plug, 64cc for my Chevy 355. Any opinion is welcome. I did see posts by Headbites, which shows a bunch of advantages that they have. I did a porting job on the bowls, gasket matched, and polished the chamber and exhaust ports
The Maxx series are good, however the Project X215 are outstanding heads, that is what would use even on a 355 if couldn't muster AFR cost heads. Even their freedom series heads are decent and are the venerated freedom series heads by you know who. I am believe Promaxx no longer names the freedom series the same, half to check again to see what they are doing. So in order from decent to more decent are = Freedom series, then more decent the MAXX series, then most decent Project X! Yup for the price especially i choose the Project X215 heads. Just a really special head that turned out great. Ask Eric he dynoed it.
Anyone who wants to buy these super cheap and resell them can pick them up for as little as $55 each on alibaba .. likely why there so many vendors selling them.
I've used them for a few years, pretty damn good heads to be imports. Most everything is made somewhere besides the USA these days. Even shit that claims to be US made.
Stay away from the early imported heads tho, definitely wouldn't trust a old pair of Pro Comps. That's the heads everyone had issues with. Shit has changed since those days.
I bought the same heads bare. For $400 from ebay. But I did put comp springs / guides. And arp studs. With milodon valves +100 over stems. I have had 0 problems out of this head. They r a good buy man.
If you really tried you could probably get these heads to be right up there with the top american heads ! Atleast close. I really enjoyed the series on your sister's heads and I know it would be A BIG HIT IF YOU DID A MAX EFFORT VERSION ON THOSE SAME HEADS !!! I guarantee it would be a hit !
Thanks for sharing I appreciate your videos they help me decide on a set of heads for my 383 build!
eric a great explationof why thing do the way they do.you explation is down to earth easy for most to understand
Thanks for sharing this information about these heads. Lots of guys who can’t afford the big money heads buy heads like these and we have to fix them. Thanks for sharing your knowledge and experience with us.
Its like this , any head will flow with the right porting.. CNC porting is the best. but most cheap heads wont last , cheap castings poor quality non heat treated aluminum bolt hole threads strip out like junk...
Idk. I bought a used pair off ebay. The pro headers brand and put on my 357. Now I just changed the springs and put them on the person I got them from might of had them worked. I also put 1.6 roller rockers and a performer rpm intake on instead of the single plane that was on it. The bottom end is .040 over flat tops comp 280h magnum camshaft and it had some junkyard smog heads on it. Way wore out. The bottom end was built by Dale Smith which is a very reputable machinist but the top end was just thrown together with stock stuff and a single plain intake. Was like that when I got the truck. Anyway seat of the pants feel I would say 75 more horse easily. Exactly what the bottom end needed. I'm really pleased with the heads and they've been on the truck over 2 years now.
Also the Genuine Dart Pro-1 heads have 5 angle valve seats cut.
Lloyd Elliot got 299 cfm out of mine through a 2.02 valve. On the 11:1 6" rod 383 in my 97 Express van.
Like Darin Morgan said you can hear a unhappy port on the flow bench from across the room.
Enjoy the videos! Keep them coming!
Awesome video, at least for me . just got the head for a 355 build.talk about timing.not everyone can afford the "good stuff" but we are trying? Thanks again for us little guys 😀😀
Only bad thing about the american head is the lack of the vortec intake bolt pattern. Makes it hard to use under a L31 intake.
Another sweet video man!
I understand that there are some decent heads coming out of India, I've seen one set for a BBC and I think they were called Liberty heads but don't hold me to that.
i like the jegs 180cc head part #20003 its like a dart also i think, or what one is it? made all the torque.
Thank you for all your real info. Blueprint also sells those heads.
2.02 vs 2.1" valve Dia. too!
8:31 can you weld the divot and then curve it . .?
Looks like an RPC head too
I have personally hand Ported a set of the aluminium CAL-Flow 200cc heads, which are also a copy of the Dart Pro-1 200cc head. Mine were a set of Angle plug heads. I left the factory 3angle valve seats alone and only checked that were good, suprisingly they were, anyway i used 2.02in and 1.6exh valves, but I did open up the throat, bowl size, and done extensive full port. Pushrod pinch was set at 1.050" I could have gone bigger. Port matched to 1206 gaskets. On a std 4" bore small block, with a 383 crank for 379ci and using a 3310 vac sec Holley, ported professional products single plane, 1-3/4 headers, Ran 11's at 118 for the 1/4 mile with, th-400 and 9" with 3.00:1 diff gears, weight of approx 3400lbs including full length dual exhaust with mufflers on D.O.T street tires driven to the track. Could only leave off the foot brake at idle, anymore and it would smoke the tires to half track.
Wish I had flow bench
3400 lbs , freeway gears street tires & mufflers small block chev. & A horse power robbing TH400 & 118 mph ! They must of gave you the slip for the other car .
@@martinkobert4321 no mate, I've got more than one 11second time slip.
@@martinkobert4321 sometimes you'll run across people that can do shit that you can't. I wouldn't spend too much time worrying about it. Just the way it is.
I have to wonder how many American head companies are having their castings done in China or elsewhere ? I work for a Piston Ring Foundry in Michigan , 23 years now , (formerly Federal Mogul ) , and we were having rings come in cast in India years ago . The rings were such bad quality with porosity like never seen before , we had to re-melt them and do them ourselves . Sadly , Tenneco automotive bought Federal Mogul , and about 7 months ago they announced all piston rings will be made in Germany and India as of July , and our plant is all done . I have also seen Edelbrock stuff for sale at parts stores that say made in China , right on the boxes . Hooker headers has their stuff made in Mexico , the list just goes on , sad but true .
These exact heads are being sold by both AFR as the enforcers and by blueprint as well as others.. I'd say a lot of american head companies are offering chinese casting as cost effective options mainly because its catching on that the chinese heads have been improving in quality and because they want to have a cost effective option for those budget minded customers.
It's funny, you said you building an engine for your Sister, my sister always had enough engine but never enough brakes every stop was a panic stop. The girl is 59 years old and still scares the hell out of everyone...LOL
What do you think about the ProMaxx heads? I’ve got a set of their 195 cc angle plug, 64cc for my Chevy 355. Any opinion is welcome. I did see posts by Headbites, which shows a bunch of advantages that they have. I did a porting job on the bowls, gasket matched, and polished the chamber and exhaust ports
you alwas get what you pay for....
basically... we need more money for the good shit
The Maxx series are good, however the Project X215 are outstanding heads, that is what would use even on a 355 if couldn't muster AFR cost heads. Even their freedom series heads are decent and are the venerated freedom series heads by you know who. I am believe Promaxx no longer names the freedom series the same, half to check again to see what they are doing. So in order from decent to more decent are = Freedom series, then more decent the MAXX series, then most decent Project X! Yup for the price especially i choose the Project X215 heads. Just a really special head that turned out great. Ask Eric he dynoed it.
Also please give a guy an idea on springs and stuff? Thanks 😀
yo Eric so do u recomnend them or no?
Thanks!
Anyone who wants to buy these super cheap and resell them can pick them up for as little as $55 each on alibaba .. likely why there so many vendors selling them.
you got a link for that. $100 a pair hell even if they're junk id still like to mess around with em
Has anyone run these long term? Do the seats stay in them? Id consider them but if they drop seats I dont want anything to do with them.
I've used them for a few years, pretty damn good heads to be imports. Most everything is made somewhere besides the USA these days. Even shit that claims to be US made.
Stay away from the early imported heads tho, definitely wouldn't trust a old pair of Pro Comps. That's the heads everyone had issues with. Shit has changed since those days.
Are these the same as eBay heads
Most likely
I bought the same heads bare. For $400 from ebay. But I did put comp springs / guides. And arp studs. With milodon valves +100 over stems. I have had 0 problems out of this head. They r a good buy man.
@@dangerdoneright I have them to they don't have issues either
I was just curious if you dynoed them
yes.. they are also sold as AFR enforcers and NKB heads by skip white.. blueprint rebrands them as well.
@@dangerdoneright doing the same myself but using comp springs I have.
If you really tried you could probably get these heads to be right up there with the top american heads ! Atleast close. I really enjoyed the series on your sister's heads and I know it would be A BIG HIT IF YOU DID A MAX EFFORT VERSION ON THOSE SAME HEADS !!! I guarantee it would be a hit !
2000 dollars for a set of heads vs 600....ill take the assault heads and put 2.08 valves in and still be 1k less