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