416 head flow. 550 Not outrageous but they were don...

  • 416 head flow. 550 Not outrageous but they were done for a 340 build. 416's and 601's (early/mid 80's 305 heads) are about as close to a performance head as you'll get on a production car from that era (the other heads used on 350's were pretty much junk, even the vette aluminum heads aren't significantly better), and can also be used well in a high efficiency, low end/mpg setup with good effect. For a supercharged, or nitrous you will need a higher intake exhaust ratio (percentage). Fun for quick blasts. I am looking for an inexpenisve iron head to replace them with. Good used Also, don't forget to do the bowls, and the valve guide area. 23:1 Actual Cpmpression Milodon 7 Qt pan M72 HV Oil Pump Engle 271/271 . 94”/1. 112 degs lobe seperation. 50 valves, 56cc chambers, amateur hour light bowl blend and general port cleanup, single angle 45* valve job. Cathedral port cylinder heads have been mistakenly dismissed by many in LS-series circles for being “old-tech. The car will be a street car running Cylinder Head Flow Data @ 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software I have a friend working over a set of chevy 416's for me and i was just curious to see if any of you had some flow numbers from them so see what i can expect. Sometimes called "center bolt HO" heads, referring to the valve cover attachment used on 1987-up SBC engines. While they do resemble the "real" HO heads (c/n's 601 and 416), the vehicles they were used on (1987 LG4, TPI 305 from 1987-'92, and the 1987-'88 L69 and LG4 used in the Monte Carlo) never had an HO designation. O Heads (416 casting) Stock Flow, Mild porting and larger valves VS Stock 305 Vortec head (520 casting) ***I lost all my video footage for these heads, and now they are installed on an engine. I did run some 1978 305 2 barrel heads on a 357" and kept the stock 1. 1) Scoggin Dickey Ported LS3 Heads: $1,699 with no core required!!! I chose to go with Scoggin Dickey heads for multiple reasons. $200. We seal the top end with Trick Flow Specialties' heads and intake. 520/. May just sell the X heads to help pay for aluminum heads. 416 heads Engine & Drivetrain All times are GMT -4. 5 valves as 601 casting but larger chamber, actually same chamber they used on all early 305 heads. 612"/. Apr 28, 2005 · Is your motor a 350 or a 305? You will gain a TON of power between those two heads. Dyno tests have proven that comparable aftermarket cathedral port heads […] Has anyone actually just swapped to these heads without changing the rest of the setup (cams, intakes, etc,etc) and posted their findings, on any forum or shared amongst engine builders/ racers? Swapping from any oem head including those modified up to a certain point (porting and $$ spent) would obviously see varying degrees of impressive results one would think, only to diminish to the point Head Casting vs Flow Chart SBC Engine & Drivetrain I'm running -416's with Z28 springs on my 283 stroker motor and am pretty happy, but they were free and my expectations weren't that high . Jul 19, 2008 · On my latest version of these heads I went a little more conservative on the intake port for durability and came up with 234cfm@28" on the flow bench. Mike (MRL) built a 9. I was originally going to use my X heads on my 416, but eventually just decided to go aluminum and be done with it. Iron vs. 550 130# seat pressure, gasket matched and bowl work. TBI - TBI and TPI heads: headflow data - The following is my post from the garage ported 193 head casting thread from 4/05. So I would argue that the AFR heads are much cheaper than trying to rework an old set of heads. xls #416 chevy heads by dirtguy » Fri Oct 24, 2014 2:01 am Will there be enough clearance for a 1. Flow about 274 cfm intake. 74" intake valve and kept the 1. 85/123 mph - factory J-heads, thru the mufflers, street-legal W8Dart371 My old 416 was: 4. e. When the port walls diviate from a straight path due to pushrod, head bolt etc location, this effects the flow and fuel atomization in a negative way. . Rebuilt resurfaced 14101081 (416) mildly ported and polished with unshrouded 1. The 601 is a truck head it has really small chambers maybe too small because theyre tight around the valves it shrouds them pretty bad. 94" will help you out in those Vortec heads or hurt you. I had the Comp. The heads are x heads ported by Dwayne Porter of Porter Racing Heads. I did a couple builds that some people would like for the money. In the case of the LS3 and (especially) LS7, the factory heads offer exceptional air­flow. If power is the goal in your build, you will be far better off with a set of L30 305 Vortec heads. Recently I was offered a used set of 305 416 heads, condition unknown for not a lot of money. I have never flowed the 305 head either, but lets guess it's under 200 cfm, which is pretty safe I think. . Other than the need for more chamber relieving for larger valves on the 601 head the job is pretty much the same. 94" valve and this is on a 4" bore deal. For the flow remember bigger is not always best. 5:1 and those small ports and valves make it responsive in the lows. Of course there are limits, the velocity gets so high turbulence or fuel separation occurs. 551 lift with 261 degs at . 02 and 1. Even ported to the max, the 416's can't compare with L30 heads in stock form. But great-flowing heads only work when they are used with the other components designed to work together (i. Quick walk-around of the 305 sbc heads (casting # -416) that i'll be using on the budget "pro street" 350 This is a set of 601 casting 305 heads I've been dragging around with me forever. Your going to see anywhere from 50-80 HP, or more, increase as a wild guess bolting on those heads. Those heads bump the compression up to over 9. The main reasons were the price of the heads, not needing a core to send in to get such a good price, and the fact that these heads are nearly comparable to much more expensive aftermarket LS3 heads. I do in Fact already own some Fresh X heads that with some port work that flow 250/172 @ . I have been looking at my 416 short block for some time now and life keeps throwing BS @ me so I an unable to buy the heads I want at this time. Intake is stock 68-69 340 manifold with the divider cut down and smoothed out a bit. Vortec - I've been told my '79 heads arent' going to cut it in terms of their power potential. Are they worth the effort compared to the stock powerpack heads on my 283 Hey all! Building a stroker 340/416 for my 70 Duster 4spd. 50 exhaust valves. The largest CNC version uses huge valves to achieve more than 416 cfm at . Of course to do these, the valves need to be out of the head. They sound like a good deal if they are the real LS7 HEADS FLOW OVER 400CFM HRD LS 6-BOLT Starting at $3500 BARE Flowing over 360CFM, Australian manufactured Higgins Holden cast alloy CNC ported heads. ” However, their thin cross-section allows for a high-velocity and smaller-volume runner design with excellent flow. The threads on how to port your own 305 heads. They are a much better flowing & performing head than the #416 head, or, the #601 4 bbl heads. --- Stock 416 casting on a stock dished piston 350 makes for a lowend monster. They will, however, require a Vortec . How are heads that have a good and a bad port handled? -- The flow numbers for the 2 ports are averaged and this number is used in the calculations. 700-inch lift. I asked the guy a question and he said they are mid to late 90`s heads. 94 / 1. I do not rely on flow numbers as much as i do on ET and mph In fact flow numbers are good in my book to compare a head before and after porting not to actually compare the power potential of 2 completely different design heads The later Vortec heads do flow better but the 416 with the 1. Thanks for the info Working with the intake and camshaft, the cylinder heads are part of the trio of performance components that dictate the power output of the engine. Cylinder heads are one of the keys to great performance on any stroker engine. My Queston is does anyone have the intake runner size, combustion chamber size, and stock valve size for the 416 casting heads he is building me? I checked mortec. 5 cc pistons. I believe in attribution so I have documented where all this data came from, and who the original author was, to my best ability. The large-displacement stroker engine demands very good cylinder head airflow to make big power. You can too. Use these numbers only as a rough guide. I will make corrections if you PM me. , camshaft, intake manifold, and headers). you are aware theres reasonably priced aluminum heads designed for a small bore sbc that out flow standard vortec heads, so don,t think those are automatically your best option. The chambers & ports are much better. I realize that dished pistons will be required with these heads on a 350. Aluminum The … As for power, depends on your head flow #s. Some people block the twinned exhaust riser/egr passages in the center exhaust ports to improve flow and stop exhaust port cross talk. The Eagles flow what 260 cfm. All depends on the app and how the combo is set up, either could out-perform the other if setup wrong. Trying to figure out heads/cam and looking for what others have done or had experience with. com not enough info. I asked if there were any ID markings and he said there is cL 1634 and cL 1645 and URU and VDE. This is a picture of a finished 416 head. For a street car, this design means excellent throttle response, torque and average power. Some of the heads with large flows and big runners are not going to be good street heads, since they will have slow flow through the runners at street rpm. TFS Heads specs BBF 429-460. 8:1 iron headed 416 a while back that made 500HP and TQ was rite around the same. Any input on which dished pistons to use would be great. 50 with a 4 angle job. 461 vs. I have a good source who tells me TFS heads never flow close to what they advertise, at least on his bench. Furtherore, I am leaning towards on older pair of used 882 heads, w/ no work done to them. I thought that track flow only make aluminum heads. about 400 euro's each (+/-500$) + the cost of buying them. 60, and basic pocket porting. On these heads this is the area to work the hardest, again as with the intake you want to streamline the guide from where it meets the back wall to it's trailing edge. Today i called a local rebuild shop for a price to rebuild these. 612" Flat tappet on a 108 LSA, installed at 104 Summit Double The X heads flow 250 @ . A small half effort only gets you a small gain. Stock 1. Re: pocket porting 416 sbc heads by JoePorting » Mon Nov 02, 2015 9:22 pm You can spend 100 hours porting those heads, and it still won't be as good as a set of AFR 195 heads. I found these on ebay. The Bd are like a Neal Ford head but with extra head bolts. I do not even know if the 1. Unless the 416s are already reworked with the 1. Oct 3, 2023 · You almost can’t have “too much” head flow in a LA motor and “excess” head flow can overcome a “not great” intake. They look like they would flow the same amount of air and I'm pretty sure both are 160cc intake runners. It is time to build my first sbc for car with good street manners, did not choose the easy way, and going to start with 305ho virgin heads. 461X fuelie heads 1. Testing power curves of 8 small block cylinder heads - Chevy High Performance Magazine - SBC Cylinder Head Info - I've compiled the following information on SBC Cylinder heads to help compare them. 416 is the so called HO head has the same 1. 557 lift 245 degs at . HRD HOLDEN Starting from $3750 Flowing over 415 CFM, Australian manufactured small block Ford cast alloy CNC ported heads. Already bought the rotating assembly, getting the SCAT 416 all forged with the dished -20. FWIW, HTH. The question is, should I take the 601 or 416 casting, wich would be better starting point? Is there difference In flow? Going port the heads and use 1. I have a set of un touched, 416 305 heads, and while on third gen, i came across the "305 head port polish and pics". The cam is an Engle flat tappet intake . 94 intake upgrade flow plenty well for street use based on what I've read. Exh is . I found a set of 416 casting heads online and was wondering if they are any good. I thought the 305 vortec heads weren't that popular due to the lower flow capability. 72 or is it 1. What are the 882 flow numbers FlowBench numbers on various SBC heads - Chevrolet Message Forum - Restoration and Repair Help putting them on my 307 casting number 14014416 there 80-85 305 HO headsjust doing some port work, nothing major It seems to me that the 601 and 416 are basically the same head except the 601 has 53cc combustion chambers and the 416 has 58 cc combustion chambers. 84/1. Which is the better casting for a performance application? Is it the -416 or the -601 5. With a PG and a 3. They flow more out of the box then a first time porter without a flow bench is likely to get out of either of Wow definitely some interest and difference of opinions on the ole 305 HO heads! The timing couldnt be more perfect for this experiment, as im building a LOW buck smallblock for project 'bottom dollar'- a 75 Monza coupe drag car for the family, buddies and myself to thrash on when we feel the All Iron Heads are DART's New Platinum Series cylinder heads! The result of three decades of cylinder head development, Iron Eagle heads incorporate features that were previously available only in expensive aluminum cylinder heads. 776 bore block 305 + . Stock hipo 340 exh If this is a closed chamber head the major exhaust flow comes from the quench pad around the center of the cylinder, inertia throws this against the outside wall and the roof. 84 and 1. A quick test of eight pairs of small block Chevy heads priced at less than $1,000 to find the best small block Chevy heads on a budget. The time now is . I do not pick up enough flow on a bench to justify the 1. this is what the specs are Heads are thoroughly cleaned and inspected Pressure tested to ensure no cracks or leaks Machined with 16 BRONZE THICK WALL GUIDES, not the flimsy guide liners 3 ANGLE SBX heads from CFE have very killer #s and some of the older canted valve Chevy castings The Brodix BD heads will flow 416 to 421 or more depending on what flow bench there on thats what we run. 305 H. 540 cam in a 340 w with alloy heads and it made 428 HP on the Our small-block Mopar is getting closer to actually "thumping". 94 intake but with larger exhaust valves @ 1. You can't tell this with flow numbers but an eyeball check comparing several differant ports will give you a good idea of what to look for. ), it is difficult to improve upon the power […] You guys mind listing your cam specs, dyno numbers, etc. Just a little trick here, since the intake and exhaust ports flow air, at fairly high rates, the valve guides that protrude into the intake and exhaust ports act as obstructions, and disrupters to the air flow. Do the rules force you to use old iron heads? I assume you mean 461 heads. 94 and 1. They were virgin low millage 69 X heads, new hardened seats, stainless Milodon valves, 5 angle valve job, valves back cut, new Comp springs max lift . Unlike cathedral-port heads (706, 317, 243, etc. C3 Tech/Performance - 882 vs. 07" bore '72 360 block 4" Cast Crank SCAT H beams Ross Domed Pistons Sealed Power Moly rings 12. 94 intake valve in a #416 305 head on a 3. 040 answers or opinions appreciated Chevy Forums FREE technical assistance for your restoration and repair. 050 lift. 550 Im very tempted to just say screw it and use them w/ A 1971 Duster 416 10. 0L head? Trying to decide on a set of heads for a 283 based mini-mouse engine project presently in the works These LS7-style heads make up its first offering, boasting excellent flow numbers for the runner size thanks to the straight runners with excellent line of sight. I agree the flow on the intake side of the vortec head is hard to beat. The Complete Cylinder Head Guide for Chevy Small Block Engines- How to Build Max Performance Chevy Small Blocks on a Budget C1 & C2 Corvettes - 461X Heads flow results - Found some interesting flow bench numbers from factory 461X heads 1. Budget Engines short block 350 (355) $450 out of Cleveland Ohio a Stock NEW rebuilt engine (0 miles). May 12, 2010 · I am a BIG fan of the vortec heads, but theres been some talk about these 416 castings working very well with minimal work, and those small chambers would really boost compression too! Jul 4, 2024 · If you want high stall/rpm launches and WOT power for like a track car, then the TPI heads more flow could be an advantage. Valves are 2. 6 valves, 62cc chambers. 60 flow @ 28 of water mild porting taken from Stan Weiss. 60” combo, and both sets of heads are fresh and ready to drop on, then I agree that it’s well worth the effort to try and sell what you have and then deal with what might be a minor added expense to get a set of Vortec heads. You can't race flow numbers anyway, but the numbers you need to look at are here are the TEA TFS 245s with N20 exhaust port. 36 gear I don't need a lot of flow. Model specific subject matter experts, classified ads and more. 94" The heads are also being built there, since the guy at AM Performance on EBay screwed me by sending me mis-matched built and casting heads. kdbnt, fhelq, gubfzy, 7wir, mhcqf, kjnnro, znu3v, fq4q, x1onn, ytqu,