I worked at a aluminum head foundry many years ago. They used a resin insert for the water jacket. Now they are using a loss foam method, which removes the need for a mold and the resin inserts. If you ever want to learn about loss foam methods, search RUclips for Kelly Coffield. His methods are the easiest to follow.
They look to be cast by Dalton Foundry as there logo is between the central 2 rocker pedestals. Ive seen that logo on a lot iron heads, GM iron bowtie Vortecs, sportsman II's, mopar W2's and the list goes on. Seems like one foundry was pushing all the iron stuff out across the US.
Thank you for working on more iron stuff. I emailed you a couple years ago to have some iron work done and you declined me even though years prior you did iron stuff. I appreciate you taking the time to go over these heads & look forward to more iron stuff in the future.
I purchased a set of these heads from Summit, because the stock heads cracked, and most of the online auto parts stores wanted more money for remanufactured stock heads than what Summit wanted. I was mostly after the fact that the Summit heads are better/thicker castings than the stock junkers! But it's a nice bonus that they come with stainless valves and screw in rocker studs too!
Great value for the money, american made to boot! Id buy those before chinese alum heads. Btdt Iron weighs a lil more but Ive never felt a difference either way when driving
Don't have a problem with Summit not making their stuff, usually that means they've tested and assured the quality is good enough to put their name on. I've hjad great luck with things like House name Water Pumps and Timing sets etc , same with Jegs actually some were better than certain 'name' brands, and cheaper!
Have a summit "msd" box I bought many yrs ago when they were truly msd . Never missed a beat! Distributor was crap but rebushed it had it curved so far no complaints. GOnna see if they got an alum short water pump for my sbc.
I've got a set of Dart 165 S/S heads on the bench I'm porting now. Exact same shift in the casting but the S/S has dual intake and valve cover bolt patterns and mine have the 2.02 & 1.60 valve sizes. I bought them bare though. I bought iron heads because they are going on a van which holds a lot more heat around the engine and I thought they would hold up a little better. Cheaper than finding a set of GM 300hp heads.
Combustion chamber design of these over the old GM iron bathtub design by itself is a big plus in my book. Id run these on a fun 350-400hp st car no problem!
Great video Eric! I have these heads and the Dart part number is on the opposite end of the Summit Logo end. I plan on modifying mine following David Vizard's porting tips for Vortec heads. They won't be great, but they won't be going on a race car either. Just going on a stout 355 street engine.
Thrilled with this video. I ordered a set of these back in January, when Summits stock was dipping into the single digits and it wasn't clear if Dart would be making more (they had just announced the discontinuation of the iron eagle line). Summits info in this head is outdated, and they advertise it as having umbrella seals and a 3 angle valve job. After having hands on 2 sets of cracked vortec 906 heads, I opted for these. My local machine shop went over them and found the valve guides had just under 1 thousandth clearance, and one head had some chatter on the intake seat. Not bad for the price. I would love to see what these flow with just a backcut on the intake! Cant wait till the rest of my engine parts come in and I can assemble my 383 vortec.
That head is still available from summit. # SUM-151124. it's a fairly good head for applications where you need an iron head or a stock replacement vortec. I use them for SBC powered boats all the time. lake water is hell on aluminum heads. they are decent right out of the box, and even better if just some mild porting to remove the ridge you were talking about and gasket matching. I really don't like the hum on the top of the port, and I don't know how it effects flow since I don't have a flow bench. but i am sure it hurts the flow.
The circled DF casting mark confirms your thought that this is a Dart head. I don't remember seeing that on every Dart head, but the heads I remember seeing it on were all Dart.
For the $$ spent i absolutely loved this head and even cracked 400 at the crank with these heads/xr288hr/4 valve DISHED piston.. DART killed it with the casting on these and at $363 a piece at the time of purchase you couldnt go wrong!
I hope you do more product testing in the future. You cover all the points an average guy like me without a dyno or flow bench needs to make an informed purchase. I purchased your intake dyno testing book, #54. I didn't have any of the intakes you tested, but as a low budget DYI-er, I most likely be buying one of those for my home made engine project. My combination wont be the optimum, but I will know what I am working with either way. When my magic racing/engine money comes in, I'll go pro built stuff. This will help me bridge that gap. Keep it up, thanks. Any thoughts on Edelbrocks new carb?
Talk about core shift on the that iron head! You can really see it on the exhaust ports! Guess I should of kept watching before I commented lol you say two seconds later
I was looking at the regular ones but after looking at flow numbers again, I might as well get the Dart Iron eagle 180 intake port heads. Twice the cost. While these are about $800 a set, the 180’s are $800 each.
They had to machine the sbc valve cover holes to clear the gasket retaining lip in vortec vc. It's the very reason I switched to sbc covers and cork gaskets on my L31 w/AFR enforcers
Eric, I am going to use the Dart 165 S/S with 87-95 bolt pattern. Charles S. is going to do the porting. I personally think they are good heads to start with if you dont mind doing some work and have to have an iron head deal. Thanks for the video
So I had the 165 cc Summit heads and they are made by DART Also I found out the hard way that if they leave the bosses in for the 4-bolt Valvecovers the stock center bolt valve cover rails hit those bosses and you can’t build them on without modifying the heads or the valve covers so that’s why they machined them down
Very good video! I'm considering a Vortec conversion, from a 305 TPI/LB9, in my '89 IROC Z convertible. Too bad you did not use the "Scribe" , sitting on your table, to point to the "Step", in the exhaust port. Not clear which ridge/step your finger is pointing too. Further one in? Is the green tape covering an EGR (Exhaust Gas Recirculation) supply, on the exhaust side , of the Iron Summit head? Thanks, Michael, St. George, UTAH.
Interesting as always. Would you say its good value buying assembled heads or can one maybe get bare heads and springs, valves etc separately? Seems to me one dont have any control over what comes with the head. Depends vi n the make perhaps?
I was wondering when I was going to hear Eric bring up the fact that iron heads are barely or aren't at all a cheaper alternative to chinese alloy heads. Been cylinder head shopping for a year and ive narrowed my choices down a lot. That is all thanks to Eric Weingartner.
Unless you're like me, and simply won't touch "Chinese" junk. I can buy 781 heads all day long for $200 a set, do some work on them, and make 700hp N/A, and I keep it all American. Yeah, I'm an old boomer, and like my American made stuff. 😉
@@Levisnteeshirt1 See thats where im torn. I want vortec heads real bad, but they crack and the exhaust seat and bowl are less to be desired. Plus more work is needed for a high lift cam. Do all this and the head is still highly prone to cracking. Might as well spend the money on those cheap Brodix IK200 heads that are USA made. But like you said, iron is great for daily driver. Which is why Im thinking of porting and shaving my 993 heads i already have.
@@Anarchy-Is-Liberty Can you find me camel hump heads? That are not fukin a rip off $1500 a rusty set? 461, 462, 041, 186..etc Trying to have factory GM iron heads that flow great, but don't crack and i can run perimeter bolt valve covers instead of centerbolt. and not pay a rip off amount for
@@shootermcgavin2819 Good luck! Everybody thinks they are gold plated. Id buy a set of TFS aluminum doube humps By the time you do all the nachiing, port work seats guides etc bet theres not a lot of $ difference..plus the tfs are new
Eric, To get the Vortec valve covers to fit, the perimeter bolt boss has to be milled down. Something the Chinese heads including the AFR Enforcers do not have right. GM Fast Burn, real AFR heads and Edelbrock Etecs have them machined as a step but they are tapped for perimeter bolts.
Confirmed. Dart has scrapped the tooling for cast iron heads. So whatever is on the shelf is what is available. World products messaged me back and said they had plans to discontinue cast iron heads at this time.
Chit...writings on the wall. Buy American people! GM has been discontinuing many iron crate engines also . Miss when you could buy a new 4 bolt block from them for 500
@@gordocarboI have three one piece rear main seal 350 engines I bought cheap. Salvage yard prices are better than market place and used no prices. All of them should clean up at .030 cause Tbi doesn’t wash cylinder walls and wear things out. I would have more if I had room. Gen 1 blocks also. If I had room. I can still get made in the USA cast iron heads from World products. 220 motowns flow pretty good. Maybe I will look at ProMaxx they flow crazy numbers.
@@gordocarbogm wants how much for a stock 350 crate engine now? $3500 for a 250hp flat tappet crate engine, whatever. Gotta pay those good union workers $50 and hour to build $120k dually trucks and SUVs that are not worth half that.
I have had a set of those 007 heads for about 3 yrs now, and was wondering about the flow numbers, they dont say dart or summit, but i took them off a vortec motor, casting 007 , any hp numbers ?
They still sell these, in 165cc runner/72cc chamber (SUM-152123) and 175cc runner/67cc chamber (SUM-151124) form. Of course, I don't know why anyone would be interested in the one with the larger chamber and smaller runner, even for an OEM rebuild.
What are you guys doing about valve springs and guides with these heads if you plan to run a decent hydraulic roller? I want to run the Summit 8802 hydraulic roller cam with these heads but, lift on that cam is given as .525. So, at the very least the guides will need work. And the recommended Comp Cams 986 springs are 1.430 diameter. So, more cost than is immediately evident.
Do these heads need the same machining for high valve lift that factory vortec heads do? I’m guessing not since there are no real valve guides in there.
I just purchased these for my 98 5.7. Have a cracked exhaust port on my stock passenger side head but otherwise very clean engine with 171k miles. Wondering if I can re-use my stock push rods and rockers if they are in good shape with these heads?
These flow about what the real vortecs flow. The Canadian 906s I have flowed 234 @ 0.450 and 242 @ 0.500. The Mexican 062s flowed 215 cfm @ 0.400 and fell to 210 cfm @ 0.450+.
I thought dart discontinued their Iron Eagle 350 heads entirely. Did another foundry purchase the tooling for this casting? I doubt dart manufactured it themselves.
I was just thinking. I'd like to see what the summit heads flow. I have a set that aren't called vortec. cylinder Head, Cast Iron, Assembled, 72cc Chamber, 165cc Intake Runner, 2.02/1.60 Chevy Summit Racing™ Cast Iron Cylinder Heads for Small Chevy SUM-152123
youtube black sheep fab shows summit sbc iron head w/o fi notch is 165 intake runner and flows 1.87.9 2.150.1 3. 199.1 4. 254.2. do you find these flow numbers are accurate and how do you feel about those heads for the street on a 355?
It floors me that they can get those kind of flows for the valve diameter, that's actually smaller than a double bump camel head! Summit shows them for $369, not a great deal of money considering you get the valves in the springs etc.
Aluminium is light ,and if you have an iron block they don't get along to well they heat up and cool down at different rates of temputure I don't want to replace the head gaskets every 7 or 9 years the Toyota 22 R was a great engine iron block aluminum head I'm 60 now and I don't want to replace head gaskets every 6 to 8 years that's just me ,make it all alumnium or all iron
22 yrs and close to 200k miles, 02 Chevy truck. Alum heads iron block. Never had the valve covers off it Many blow HG due rto lack of maintenance or driving habits.
@@KingJT80when you consider what you are getting for the $ difference, well worth it. In the test 355 with 10:1 compression and a 222/230 @ 0.050 roller cam, the Etecs beat those out by over 40 hp. At the time I ran them, the Etec170s with the roller spring package were only about $300 than those Summit re-branded Darts.Those Darts were dead last in performance in a 5 way shoutout of Vortec heads. The stock casting even performed better, then again the point of those heads was for the mass engine rebuilders to have something to replace cracked stock castings with. Etec170s outperformed all other heads tested including the Bowtie 180cc Vortecs.
@@chrisreynolds6520back then they were that much. now etec 170 are about 1000 a pc from edlbrock themselves at that point you might as well buy the AFR 190 vortecs thats are 2100 and blow all of them out of the water or just buy the promaxx vortecs which are better than these and cost even less
For on the street the Iron heads are a giant waste of money! If i had known what I know now about vortec heads I would of spent my money on a set of Ebay DNA heads and spent the money at machine shop doing valve job! Everything vortecs cost more money and the weight of cast iron sucks!
Some racing classes require stock iron heads. The Vortec is still extremely popular choice because they're still the best flowing/performing stock iron heads by far.
Youll never feel 40 lbs behind the wheel. You would be lottery lucky if all those Chinese heads needed was a valve job the 5 angle and tu;ip deal is pretty slick.
Well you do not have to worry about cast iron heads. Dart is discontinued cast iron heads for the small block Chevy January 1, 2023. Great. How is that made in china crap helping made in USA. I don’t want aluminum heads not for street, not for anything.
@@WeingartnerRacingif cost is the big issue for cast iron heads, how long before aftermarket cast iron cylinder blocks go away? If that’s really the issue is cost. Probably the market has all gone LS and it’s not cost effective to make gen 1 sbc cast iron heads because the market is small. Maybe.
@@WeingartnerRacing my friend had 400k miles on a 5.3. duramax diesels even have aluminum heads. this isn't the 60s where aluminum is still kinda sci-fi.
@@DavidB7474 Cant get a replacement engine for my 02 5.3 from GM. They are discontinuing a ton of engines Even a bare 4 bolt block is over a grand now...nuts. Paid $500 around 2000.
Авто/Мото
I worked at a aluminum head foundry many years ago. They used a resin insert for the water jacket. Now they are using a loss foam method, which removes the need for a mold and the resin inserts. If you ever want to learn about loss foam methods, search RUclips for Kelly Coffield. His methods are the easiest to follow.
We did lost phone casting in high school at our school foundry.
They look to be cast by Dalton Foundry as there logo is between the central 2 rocker pedestals. Ive seen that logo on a lot iron heads, GM iron bowtie Vortecs, sportsman II's, mopar W2's and the list goes on. Seems like one foundry was pushing all the iron stuff out across the US.
Thank you for working on more iron stuff. I emailed you a couple years ago to have some iron work done and you declined me even though years prior you did iron stuff. I appreciate you taking the time to go over these heads & look forward to more iron stuff in the future.
That head is in the 2016 Dart catalog
23* 170cc late model & vortec style
I purchased a set of these heads from Summit, because the stock heads cracked, and most of the online auto parts stores wanted more money for remanufactured stock heads than what Summit wanted.
I was mostly after the fact that the Summit heads are better/thicker castings than the stock junkers! But it's a nice bonus that they come with stainless valves and screw in rocker studs too!
How are they working out for you? Looking into getting some for my L31
@@carlomendoza8588 It runs very well
Great value for the money, american made to boot! Id buy those before chinese alum heads. Btdt
Iron weighs a lil more but Ive never felt a difference either way when driving
Don't have a problem with Summit not making their stuff, usually that means they've tested and assured the quality is good enough to put their name on. I've hjad great luck with things like House name Water Pumps and Timing sets etc , same with Jegs actually some were better than certain 'name' brands, and cheaper!
Playing with fire.
Have a summit "msd" box I bought many yrs ago when they were truly msd .
Never missed a beat! Distributor was crap but rebushed it had it curved so far no complaints.
GOnna see if they got an alum short water pump for my sbc.
When it comes to port analysis Eric you are the MAN
Another great video, Eric, thank you ,GODSPEED.
Love your Channel Eric.....you do a great job!
Looks like a really good foundation to port on. Thanks Eric. Hang in there.
This is very interesting as I’m using some 906s on a lower budget 383 build. Thanks for the help Eric. Maybe this will help with the algorithm.
Well I got a lot out of that, thanks a bunch. I have been looking at these for a mild kind of small block. for what I see, and the cost, i like em.
I've got a set of Dart 165 S/S heads on the bench I'm porting now. Exact same shift in the casting but the S/S has dual intake and valve cover bolt patterns and mine have the 2.02 & 1.60 valve sizes. I bought them bare though. I bought iron heads because they are going on a van which holds a lot more heat around the engine and I thought they would hold up a little better. Cheaper than finding a set of GM 300hp heads.
Combustion chamber design of these over the old GM iron bathtub design by itself is a big plus in my book.
Id run these on a fun 350-400hp st car no problem!
Great video Eric! I have these heads and the Dart part number is on the opposite end of the Summit Logo end. I plan on modifying mine following David Vizard's porting tips for Vortec heads. They won't be great, but they won't be going on a race car either. Just going on a stout 355 street engine.
With a little "LOVE" those are 500HP heads on a 383👍
Thrilled with this video. I ordered a set of these back in January, when Summits stock was dipping into the single digits and it wasn't clear if Dart would be making more (they had just announced the discontinuation of the iron eagle line). Summits info in this head is outdated, and they advertise it as having umbrella seals and a 3 angle valve job. After having hands on 2 sets of cracked vortec 906 heads, I opted for these.
My local machine shop went over them and found the valve guides had just under 1 thousandth clearance, and one head had some chatter on the intake seat. Not bad for the price. I would love to see what these flow with just a backcut on the intake! Cant wait till the rest of my engine parts come in and I can assemble my 383 vortec.
Thanks. I'm watching. Maybe even learning something. Answered my questions.
That head is still available from summit. # SUM-151124. it's a fairly good head for applications where you need an iron head or a stock replacement vortec. I use them for SBC powered boats all the time. lake water is hell on aluminum heads. they are decent right out of the box, and even better if just some mild porting to remove the ridge you were talking about and gasket matching. I really don't like the hum on the top of the port, and I don't know how it effects flow since I don't have a flow bench. but i am sure it hurts the flow.
Youd be surprised what doesnt hurt it
I got a set of these as a stock replacement year before last. Glad to hear it was an ok choice
Great choice actually There are 200cc chinese heads that might/might not keep up on the int port
Liking the 5 angle valve job.tulip deal thats a plus
I really like the blind rocker studs in these. Plus they are thick as heck
The circled DF casting mark confirms your thought that this is a Dart head. I don't remember seeing that on every Dart head, but the heads I remember seeing it on were all Dart.
Interesting !! Thanks Eric
For the $$ spent i absolutely loved this head and even cracked 400 at the crank with these heads/xr288hr/4 valve DISHED piston.. DART killed it with the casting on these and at $363 a piece at the time of purchase you couldnt go wrong!
Gah lee, they're 640 a piece now 😅
Its insane the last i checked they were 588@@caddyv2327
@@caddyv2327 They will last forever though, intake port does pretty well.
I hope you do more product testing in the future. You cover all the points an average guy like me without a dyno or flow bench needs to make an informed purchase. I purchased your intake dyno testing book, #54. I didn't have any of the intakes you tested, but as a low budget DYI-er, I most likely be buying one of those for my home made engine project. My combination wont be the optimum, but I will know what I am working with either way. When my magic racing/engine money comes in, I'll go pro built stuff. This will help me bridge that gap. Keep it up, thanks.
Any thoughts on Edelbrocks new carb?
Talk about core shift on the that iron head! You can really see it on the exhaust ports! Guess I should of kept watching before I commented lol you say two seconds later
I was looking at the regular ones but after looking at flow numbers again, I might as well get the Dart Iron eagle 180 intake port heads. Twice the cost. While these are about $800 a set, the 180’s are $800 each.
They had to machine the sbc valve cover holes to clear the gasket retaining lip in vortec vc.
It's the very reason I switched to sbc covers and cork gaskets on my L31 w/AFR enforcers
Thanks
Eric, I am going to use the Dart 165 S/S with 87-95 bolt pattern. Charles S. is going to do the porting. I personally think they are good heads to start with if you dont mind doing some work and have to have an iron head deal. Thanks for the video
He knows his chit big time!! Youll love the results
That's pretty cool budget head
That looks pretty good I wonder how much that they're going for on the market
So I had the 165 cc Summit heads and they are made by DART
Also I found out the hard way that if they leave the bosses in for the 4-bolt Valvecovers the stock center bolt valve cover rails hit those bosses and you can’t build them on without modifying the heads or the valve covers so that’s why they machined them down
Very good video! I'm considering a Vortec conversion, from a 305 TPI/LB9, in my '89 IROC Z convertible. Too bad you did not use the "Scribe" , sitting on your table, to point to the "Step", in the exhaust port. Not clear which ridge/step your finger is pointing too. Further one in? Is the green tape covering an EGR (Exhaust Gas Recirculation) supply, on the exhaust side , of the Iron Summit head? Thanks, Michael, St. George, UTAH.
Nice review. Have you gotten your hands on a set of the Promaxx 185cc Vortec heads?
Interesting as always.
Would you say its good value buying assembled heads or can one maybe get bare heads and springs, valves etc separately?
Seems to me one dont have any control over what comes with the head.
Depends vi n the make perhaps?
I always get everything separate so I get everything I like for the build and clean up the port or a little porting
I was wondering when I was going to hear Eric bring up the fact that iron heads are barely or aren't at all a cheaper alternative to chinese alloy heads. Been cylinder head shopping for a year and ive narrowed my choices down a lot. That is all thanks to Eric Weingartner.
I would rather have an iron head on a daily ,, alum heads over time may get soft with tons of heat cycles,, iron won't do that
Unless you're like me, and simply won't touch "Chinese" junk. I can buy 781 heads all day long for $200 a set, do some work on them, and make 700hp N/A, and I keep it all American. Yeah, I'm an old boomer, and like my American made stuff. 😉
@@Levisnteeshirt1 See thats where im torn. I want vortec heads real bad, but they crack and the exhaust seat and bowl are less to be desired. Plus more work is needed for a high lift cam. Do all this and the head is still highly prone to cracking. Might as well spend the money on those cheap Brodix IK200 heads that are USA made. But like you said, iron is great for daily driver. Which is why Im thinking of porting and shaving my 993 heads i already have.
@@Anarchy-Is-Liberty Can you find me camel hump heads? That are not fukin a rip off $1500 a rusty set? 461, 462, 041, 186..etc
Trying to have factory GM iron heads that flow great, but don't crack and i can run perimeter bolt valve covers instead of centerbolt. and not pay a rip off amount for
@@shootermcgavin2819 Good luck! Everybody thinks they are gold plated. Id buy a set of TFS aluminum doube humps
By the time you do all the nachiing, port work seats guides etc bet theres not a lot of $ difference..plus the tfs are new
Eric,
To get the Vortec valve covers to fit, the perimeter bolt boss has to be milled down. Something the Chinese heads including the AFR Enforcers do not have right. GM Fast Burn, real AFR heads and Edelbrock Etecs have them machined as a step but they are tapped for perimeter bolts.
Confirmed. Dart has scrapped the tooling for cast iron heads.
So whatever is on the shelf is what is available.
World products messaged me back and said they had plans to discontinue cast iron heads at this time.
Chit...writings on the wall. Buy American people!
GM has been discontinuing many iron crate engines also .
Miss when you could buy a new 4 bolt block from them for 500
@@gordocarboI have three one piece rear main seal 350 engines I bought cheap. Salvage yard prices are better than market place and used no prices. All of them should clean up at .030 cause Tbi doesn’t wash cylinder walls and wear things out. I would have more if I had room. Gen 1 blocks also. If I had room. I can still get made in the USA cast iron heads from World products. 220 motowns flow pretty good. Maybe I will look at ProMaxx they flow crazy numbers.
@@gordocarbogm wants how much for a stock 350 crate engine now? $3500 for a 250hp flat tappet crate engine, whatever. Gotta pay those good union workers $50 and hour to build $120k dually trucks and SUVs that are not worth half that.
NIce budget head
So would a safe guess be the regular cast iron summit heads that we think are also made by dart, flow the same?
I have had a set of those 007 heads for about 3 yrs now, and was wondering about the flow numbers, they dont say dart or summit, but i took them off a vortec motor, casting 007 , any hp numbers ?
Eric when are you going to do a video on some SBC 13/15 deg manifolds and heads???
Love to see that. ALways wanted to make my sr 383 a 15 deg setup. Tough to go 18 when 15s better no?
They still sell these, in 165cc runner/72cc chamber (SUM-152123) and 175cc runner/67cc chamber (SUM-151124) form. Of course, I don't know why anyone would be interested in the one with the larger chamber and smaller runner, even for an OEM rebuild.
I wonder if the 175 is the dart 180 runner?
larger bore for 400? Lower compression who knows.
What are you guys doing about valve springs and guides with these heads if you plan to run a decent hydraulic roller?
I want to run the Summit 8802 hydraulic roller cam with these heads but, lift on that cam is given as .525. So, at the very least the guides will need work. And the recommended Comp Cams 986 springs are 1.430 diameter. So, more cost than is immediately evident.
Do these heads need the same machining for high valve lift that factory vortec heads do? I’m guessing not since there are no real valve guides in there.
Happy 4th of July 🎉..
will a higher flowing head create more psi in the chamber?
Did you see the holes for the rocker studs? Not centered
for a while summit sold a 165 "double hump" and a 170 vortec.
I just purchased these for my 98 5.7. Have a cracked exhaust port on my stock passenger side head but otherwise very clean engine with 171k miles. Wondering if I can re-use my stock push rods and rockers if they are in good shape with these heads?
If thgey arent real worn, sure. Heads in vid are pretty decent
@@gordocarbo I ended up reusing them and they worked great!
These flow about what the real vortecs flow. The Canadian 906s I have flowed 234 @ 0.450 and 242 @ 0.500. The Mexican 062s flowed 215 cfm @ 0.400 and fell to 210 cfm @ 0.450+.
Are these essentially the same heads that were used in The Danger Mouse Sbc motortrend build back in 2003?
I believe they where EQ vortec heads. That build is featured in DV's small block book
The Etec170s eat these for lunch.
@@chrisreynolds6520 Are they cast iron heads, same price range?
The Summit Vortec heads # SUM-151124 flow 175cc as in all their books.
When will we see the b1 mopar heads?????
I thought dart discontinued their Iron Eagle 350 heads entirely. Did another foundry purchase the tooling for this casting? I doubt dart manufactured it themselves.
Actually it's a good looking head. It should be more capable than the vortec
I was just thinking. I'd like to see what the summit heads flow. I have a set that aren't called vortec.
cylinder Head, Cast Iron, Assembled, 72cc Chamber, 165cc Intake Runner, 2.02/1.60 Chevy
Summit Racing™ Cast Iron Cylinder Heads for Small Chevy SUM-152123
Do these flow as good as the 906 GM heads?
youtube black sheep fab shows summit sbc iron head w/o fi notch is 165 intake runner and flows 1.87.9 2.150.1 3. 199.1 4. 254.2. do you find these flow numbers are accurate and how do you feel about those heads for the street on a 355?
ona street 355 with flat tops and a mid 230s duration camshaft and an air gap and 750...should be a 425+HP engine
@@KingJT80 Isky 280 dual plane 650 DP, perfect .
@@gordocarbo I'd like to see the lift a lil higher like a voodoo 233/241 .505/525 but a 650DP right on the money
They only make two cast iron heads The dart 165 and this vortec.
Do they still make the 165?
It floors me that they can get those kind of flows for the valve diameter, that's actually smaller than a double bump camel head! Summit shows them for $369, not a great deal of money considering you get the valves in the springs etc.
Great deal, for its size ought to make good power.
I was looking at getting these, after 5 mins of research a nearly barfed. Not even close to a good vortec head
What are you talking about? Id take these all day over GM vortecs. They are way overrated.
Aluminium is light ,and if you have an iron block they don't get along to well they heat up and cool down at different rates of temputure I don't want to replace the head gaskets every 7 or 9 years the Toyota 22 R was a great engine iron block aluminum head I'm 60 now and I don't want to replace head gaskets every 6 to 8 years that's just me ,make it all alumnium or all iron
You are wrong on that assumption. Modern cars have had aluminum heads and blocks for years with no problems.
22 yrs and close to 200k miles, 02 Chevy truck. Alum heads iron block. Never had the valve covers off it
Many blow HG due rto lack of maintenance or driving habits.
The Etec 170s eat these for lunch.
theyre also a lot more money too and aluminum. im not surprised there
@@KingJT80when you consider what you are getting for the $ difference, well worth it. In the test 355 with 10:1 compression and a 222/230 @ 0.050 roller cam, the Etecs beat those out by over 40 hp. At the time I ran them, the Etec170s with the roller spring package were only about $300 than those Summit re-branded Darts.Those Darts were dead last in performance in a 5 way shoutout of Vortec heads. The stock casting even performed better, then again the point of those heads was for the mass engine rebuilders to have something to replace cracked stock castings with. Etec170s outperformed all other heads tested including the Bowtie 180cc Vortecs.
@@chrisreynolds6520back then they were that much. now etec 170 are about 1000 a pc from edlbrock themselves
at that point you might as well buy the AFR 190 vortecs thats are 2100 and blow all of them out of the water
or just buy the promaxx vortecs which are better than these and cost even less
For on the street the Iron heads are a giant waste of money! If i had known what I know now about vortec heads I would of spent my money on a set of Ebay DNA heads and spent the money at machine shop doing valve job! Everything vortecs cost more money and the weight of cast iron sucks!
Some racing classes require stock iron heads. The Vortec is still extremely popular choice because they're still the best flowing/performing stock iron heads by far.
Youll never feel 40 lbs behind the wheel. You would be lottery lucky if all those Chinese heads needed was a valve job
the 5 angle and tu;ip deal is pretty slick.
Well you do not have to worry about cast iron heads. Dart is discontinued cast iron heads for the small block Chevy January 1, 2023. Great. How is that made in china crap helping made in USA. I don’t want aluminum heads not for street, not for anything.
The factory have been using aluminum heads on vehicles for decades and they go 100k miles.
@@WeingartnerRacingyeah yeah I know I need to be more open minded. I just prefer cast iron.
@@WeingartnerRacingif cost is the big issue for cast iron heads, how long before aftermarket cast iron cylinder blocks go away? If that’s really the issue is cost. Probably the market has all gone LS and it’s not cost effective to make gen 1 sbc cast iron heads because the market is small. Maybe.
@@WeingartnerRacing my friend had 400k miles on a 5.3. duramax diesels even have aluminum heads.
this isn't the 60s where aluminum is still kinda sci-fi.
@@DavidB7474 Cant get a replacement engine for my 02 5.3 from GM. They are discontinuing a ton of engines
Even a bare 4 bolt block is over a grand now...nuts. Paid $500 around 2000.
Look at CHI Australian heads. Brilliant. Also Racer Pro. ..makes brodix look like puppies.