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Small block chevy head castings; Casting # Combustion Chamber size CCs Intake valve Exhaust valve Production Years Misc Engine; 10033867: 62cc: 2. . JEGS Cast Iron Vortec Cylinder Head has fast burn combustion chambers and high-velocity intake and exhaust ports. 185cc Cast Iron Vortec Cylinder Heads. If they are TBI heads, they wont flow for crap! The only difference between the #062 and #906 Vortec head is in the exhaust seat of the HD/1-ton truck #906 version, as described above. However, when you move the HP level up to 500 or more HP , the vortec can NOT keep up with say a small AFR head== At the 500 HP level, THe AFR head is going to be 50 or 60 HP better at high RPM. Stage 2.5 will include aftermarket 2.02/1.57 stainless steel valves. "The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). The biggest advantages of the aluminum E-tec 170's is the ability to handle a high-lift cam and the weight savings. I have run this combo 64cc heads w/flat tops and less than .002 deck height with no problems, however they were not vortec heads, but same combustion chamber volume. $997.95. THESE ARE SOLD AS A PAIR. Heads are assembled with NEW 1.60 Stainless Steel ONE piece Exhaust valves. Description. winterfunguy. The first major change to chambers came when emissions requirements led to increasing the size of the chamber to reduce compression and attempt to reduce the hydrocarbon count in the exhaust residue. This guide boss is also very tall. Though the runners are identical to those on the LS6, its combustion chambers are larger, just like the LQ4. PRC CNC Porting >/Machining Service Includes:. These giant heads, made of iron, increased the power and torque of these motors by orders of magnitude. If you are willing to take on the additional work, the Vortec heads are capable of unleashing 500 lb-ft of torque. You need the main info about your engine components to get the right . They are about velocity/flow balance and fuel mix/combustion quality. HAHA chevy hi performance said that there is a difference. There are two variations to look for; casting numbers 12558062 and 10239906. Center bolt valve covers don't ID a Vortec head either, although they do use center bolt valve covers. Check this casting carefully to determine which features it . Camshafts with more than 0.475" lift require machining valve guide bosses and checking valve seal to valve spring retainer clearance. View Details. Those are Open Chamber Peanut Port heads - advertised as 118cc, will most likely measure 121-122cc. As far as I know there are only 3 different Vortec v8 casting numbers:520 (305) 062,906 (350) This forum is intended to offer you support with all the up-to-date . . A 4 inch bore 283 is a 302, and we all know how they run when built correctly. Vortec heads (that you already have) $375 + $150 for an intake = $525 or at least $215 cheaper. Features include fast burn combustion chambers, and a high-velocity port design. One version had an Inconel exhaust seat with single angle valve grind and was available on 1 ton trucks. But the heads that are being referred to here are from trucks and SUVs produced from 1996-2002. Originally, the stock #906 casting head was available in two versions. *New* For vortec . Vortec Chamber (No Heat Riser), Vortec Intake Bolt Pattern, Center Bolt Valve Cover Pattern. in this thread in this sub . Older heads needed 32 and up to ensure a more complete burn. Is the 062 chevy vortec head any. Raised intake roof for enhanced air flow. Sold as pairs. The Vortec heads offer great intake port flow despite the rather small 1.94-inch valves. Engine Size . That part number you called out is for a 50cc domed piston. The Vortec head features a very large boss at the base of the valve guide that measures .850-inch in diameter and is used to locate the 1.250-inch outside diameter (O.D.) The only other way is the "heart shaped" combustion chambers. In the 350 to 530hp zone they do pretty good. Generally, most performance small-block heads used a 64-cc combustion chamber roughly in the shape of a tub. The 906 or 062 can be bought on eBay for reasonable money. The stock vortecs can only take about .450" lift. wyoming centennial spurs . ESCALADE 99-00. . Chevy Vortec Aluminum 350 Cylinder Heads 64cc 2.02/1.60. EngineQuest, Chev SB Vortec Performance Cast Iron Heads, 170cc/64cc, Vortec Intake, Assembled Stage 1, Pair. Aluminum, LT5, ZR1, DOHC, 32-Valve, drivers Side. 480 hp potential naturally-aspirated. Hardened intake and exhaust seats. The History. Chevrolet Performance cast iron Vortec cylinder heads will fit 1958 and later small block Chevy engines, and offer a 20 to 40 hp increase over earlier cast iron small block heads. The Vortec heads are a little bit lighter than the older heads and have a "kidney" or "heart" shaped combustion chamber that is more efficient than the double hump chamber. Vortec heads (need to know type of stud) - Gen I & II Chevy V8 Tech Board - HybridZ. at some point you will split the seal. Now you can push harder and the seal gives way and can hit .520" plus but like I said your pushing into the seal. Re: l31 vortec heads. The Speedway heads are $369.99 EACH so $740 plus shipping. Chamber pressures exceeding 200psi are usually really finicky about octane, heat, and timing. Compression equals horsepower. They require the use of a Vortec-style intake and self-aligning rocker arms, and come . This head performs great right out of the box but can be mildly ported and milled up to 0.040 in. Uses bare head P/N 12529093. Vortec style intake manifold bolt pattern. A new stock Chevy "Mexico" Vortec head will flow in the 210 to 215 cfm range on the intake and about 145 cfm on the . THIS HEAD IS COMPLETE WITH VALVES AND SPRINGS. ENQCH305B. too much increase in port size or loss . These production Vortec heads were used in the new Vortec 350ci engine intended for -, -, and 1-ton Chevy pickups. Learn More. The 062 heads with stock retainer, keepers and stock valve seal in place ( spring removed)showed .490" lift when it made contact (retainer,seal). In Stock. Out of the box double hump cast heads produced . Description. Where you can gain substantially more power is by concentrating on the exhaust side of the head. Oct 11, 2012. graphicjunki said: Machine shop told me that with the stock pistons it should be like 9:1. Sure, rebuilding factory cast iron heads is expensive and partially what made the Vortec head a popular choice in the first place. Head History. Our stage 1 porting service will include the re-use of the stock vales. J. 530hp+takes work. The Vortec heads are much like other stock small-block heads in that the intake port flows fairly well, but higher rpm power is limited by a weak exhaust port. CHEVROLET 1500 PICKUP 96-99 CHEVROLET 2500 PICKUP 96-99. Assembled with premium parts such as manganese valve guides, and . Speed Pro says they should work with an open chamber configuration . $414.95. which twists the fuel mix similar to a tornado vortice, hence the Vortec nomenclature. The origin of the term Vortec was for a combustion chamber design with a ramp port which debuted with the 2.0L motor used with the GM J platform (Cavalier et.al.) GM Performance Parts offers a 383 with Vortec heads that makes 435 ft/lbs torque and 340 HP with a mild cam and carb. The increase was primarily due to the high port ows in the.300 "-.500" cylinder pressure area, and it was also because of . 07-02-2009, 07:25 PM. The price listed is for you sending your cathedral port cylinder heads (4.8/5.3, LS1, LS6, LS2, LQ4/9) to us for porting . Get a good calculator, pull out the old math skills from the past and get to work. If the budget is an issue I would use the Vortec heads and scan the ads for a used intake. Just got done porting my vortec 062 heads. The only difference between the #062 and #906 Vortec head is in the exhaust seat. $778.99. Bare. valve spring. By porting I mean removing the casting that shrouds the valves in the bowl and smoothing out the castings in the bowl and runners and polishing the "ski ramps" on the intake guides. . EngineQuest, Chev SB Vortec , Performance Cast Iron Heads , 170cc/58cc, Straight Plug, Bare, Each. This casting # has been used in many different versions of this aluminum 18 and 15 Bowtie race head. Vortec design combustion chamber. Yes they will fit right on there with no machine work are problems. The ONLY two things that ID's a Vortec head, as used for the SBC for performance, is the last three numbers of the casting numbers, 906 or 062; both are crack prone however. Straight spark plugs. Basically its the 58cc combustion chamber(on 305 heads) vs 64-76cc chambers on 350 heads, with slightly different runners sizes. Good luck. Features include fast burn combustion chambers, and a high-velocity port design. Angle or Straight plug design. Heads are assembled with NEW 2.02 Stainless Steel ONE piece Intake valves. This led to open chambers designed to . Share. This combination of optimal runner design and larger chambers makes the "035" head (aka "317") the best of the OEMs for boost. Amazingly, this mundane, production-based 1.94/1.50-inch valve head performed . By Poundz9oh9, October 31, 2006 in Gen I & II Chevy V8 Tech Board. Specifically the intake closing and exhaust opening during the compression stroke. Now as for the Vortec heads, from what info I've been able to find out, you can safely flat mill them down .040" and end up with around a 58-60cc chamber. All GM stuff people like to call Vortec , Vortec heads , you know the ones that flow the best are the 96+'s. Yes the current intake will not bolt up to it, but if you look at Edlebrocks site you'll find some marine and street intake that do bolt up, requires a new throttle body and doesnt come with EGR. seals mounted directly on the top of the guide. For a street smallblock, the E-tec 170 is a great choice. 906 VS 062 vortec heads! Best power is made with 32 total timing, although these heads can make power with timing reduced to 29 when used with short-duration camshafts. ProMaxx Performance 185cc Cast Iron Vortec Cylinder Heads Small Block Chevy Heads. Vortec Bowtie cylinder heads come with large valves, a thick deck surface and 66-cc combustion chambers. Chevrolet Performance cast iron Vortec cylinder heads will fit 1958 and later small block Chevy engines, and offer a 20 to 40 hp increase over earlier cast iron small block heads. Chevrolet Small Block Head Casting Numbers. Search: Chevy 350 Heads Identification. We also offer valve spring upgrades. SHARE POST #30. The vortec heads come from the 1999 (ish) years, and I just Googled 1999 Chevy Camaro compression ratio, and it says 10:1. But these aren't your grandpa's camel hump heads and here is why! 64 CC combustion chambers. As long as the engine is in the 375 to 425 HP range, The vortec is a best bang for the buck winner. Depending on the size of your small-block, the Vortec's 64cc combustion chambers . Different chamber volumes, port volumes, port locations, valve sizes, etc. The #062 has a 3-angle grind on a standard-induction hardened seat; the #906 a single-angle grind on an Inconel seat. Bronze thick wall guides. VORTEC HEADS YOULL FIND IN SALVAGE YARDS HAVE THESE HEAD MARKINGS. Estimated to ship direct from manufacturer on 09/01/22, pending manufacturer availability. 2-door Compact Passenger Car (15) 2-door Mid-Size Passenger Car (16). Those heads are similar to a Vortec with 60cc chambers and 1.94/1.50 stock valves. PAIR OF GM CHEVY 350 VORTEC #906/062 CYLINDER HEADS. Vortec Chamber with Heat Riser, Vortec Intake Bolt Pattern, Center Bolt Valve Cover Pattern. JOE SHERMAN RACING. Head Milling 101: The Basics of Head Milling to Gain Compression. were used. L31 Vortecs comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). Unlike the used Vortec heads pulled of of passenger vehicles, these new Chevy casting do not have issues with cracking. These upgraded production cylinder heads are ideal for 400-450 horsepower street and racing (great for circle track applications) engines. The bigger heads to follow were the "double-hump" heads championed by the mid-'60s 327 engines. The selection list is basically rather thin for today's performance engines. In theory, forcing air and fuel in as small a combustion chamber as possible (measured in volume) will yield maximum engine . The other version was the traditional three angle valve grind. valve size, combustion chamber, etc., iron heads on the market. VORTEC HEADS HAVE A DIFFERENT INTAKE BOLT ANGLE ON SOME BOLT LOCATIONS. grey shar pei. The "062" version has three triangles on the front to identify it. L-31 Vortec cylinder heads' installation in GM trucks and vans' 350 engines was between 1996 and 2000. Heres the difference and what you can do to make more HP!See my other videos for more about porting and flow data! The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). 64-cc combustion chamber. Originally, the stock #906 casting head was available in two versions. The reason is simple: The more you squeeze the air and fuel mixture in the combustion chamber, the more power you can create. Stock out-of-the-box Vortec heads have approx. My GM 14092360's combustion chamber measured at 118cc's and I ran them with a 22cc dome piston (Speed Pro p/n H693CP). Small Block Chevy Heads. You need a little smaller on a 283 though. The hipo 6.0-liter truck engines, such as the Cadillac Escalade, received this variation on the LS6 head. These are 062 Vortec heads that I use on my 1990 Third Gen Camaro.The Vortec . No heat risers. The new Mexican castings are good, thick heads and can be flat cut to the mid 50's without any issues. NEW PAIR of aftermarket GM CHEVY VORTEC 350 V8 5.7 OHV CAST IRON PERFORMANCE CYLINDER HEADS 2.02 STAINLESS VALVES 906 062 1996 - 2000. If you want to make more/the most power (with a vortec style cylinder head) head than the rest of the crowd, start with the new GMPP Bowtie Vortec heads as a starting point. Will Vortec 350 heads work on vortec 305 engine without any machine work? CHEVROLET VAN 96 -2002. Chamber pressure is dictated by your valves opening and closing events rather than volume size. I gasket matched the intake ports and blended them to the existing runner radius at the ports. Next is angle milling. They require the use of a Vortec-style intake and self-aligning rocker arms, and come . The 062 does flow slightly better on the exhaust side at low lifts but the advantage over a 906 is very slight. I am looking to have built a little race motor 350-400 horse. How much are you willing to invest? Completely assembled with 1.940"/1.500" valves. Requires Vortec-specific intake manifold. Extra thick deck surface. 190CC intake ports. The head uses .560-inch I.D. Oct 1, 2011. 185 CC intake runners. Another idea is to get some cast iron 94-96 LT1 350 heads and an electric water pump. The earliest 265 and 283 small-blocks relied on an iron Power Pack head that featured 58-cc chambers and tiny 1.72/1.50-inch valves. I put flat tops in so they are saying mine should be like 9.5 - 10:1. . 130 POUNDS FOR THE PAIR. Now I removed the seal and I measure how much . In Stock. The combustion chamber design was a radical departure from anything GM cast in iron prior to the introduction of these heads, and is of a 'double-quench' design. 3/8 STUD. Rusty O'Toole, Sep 28, 2016. toddman67. ENQCH350CK1. FITS 1996 to 2002. There are reports of some shops getting close to 300 cfm out of these heads in fully-ported form. and requires a Vortec-style intake manifold; modifying the head to accept an early intake manifold is not recommended. i believe the difference is the valve size and combustion chambers 76 cc & 64 cc now i dont know which one has what , but i believe the " 906 " is the better of the two hopefully someone will tune in an . Brand New Chevy 350 5 7 Vortec Cylinder Heads Pair 906 062 Suburban 1996 2002. Only 906 heads used on the HD 3/4 & 1 ton trucks received the hardened insert along with,in some cases, sodium filled exhaust valves.IIRC,that was only during the 1st few yrs of production.Later models & those used on 1/2 ton production engines are the same as an 062.You should be able to see the insert witness line if you do have a set of the . Vortec Bowtie cylinder heads are the most powerful cast-iron heads offered by Chevrolet Performance.
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