Big block chevy head specs. The heads are manufactured to precise machining tolerances.

Big block chevy head specs. The 454 would be offered in all manner of cars and trucks and in various iterations as well until the engine was phased out in 1976 due to unleaded fuels Jan 8, 2011 · I have a set, and was wondering if they were a decent head. Here is an EZ Read head bolt torque sequence for the Big Block Chevrolet's 366, 396, 402, 427 and 454. 19 intake, 1. Feb 24, 2023 · Chevy 396 big block specs, applications, engines, RPO, and horsepower. The block is a 1986 truck unit based on the engine number. I have a set of 3999241 in stock form. In the aftermarket, most performance heads are aluminum rectangular port, open-chamber designs reminiscent of the original LS6 casting Jun 22, 2007 · In this comparison we look at cylinder heads for big-block Chevy engines from some of the best manufacturers, including Edelbrock, AFR, Trick Flow, and GMPP, as well as looking at some heads for Aug 17, 2009 · Cylinder heads are understandably a vital ingredient in any recipe for "porcupine" horsepower pie, so whether the big-block in your Corvette is being built for street performance, drag racing The PRO1 24 Deg 345cc cylinder head is for uncompromising performance and racing applications which favor high RPM power over low end flexibility. 4cc Compressed Volume The BoxWrench Engine Specs Database is a community resource for mechanics of all skill levels to access a reference library of Firing Orders, Distributor Rotation Directions and Block-Cylinder Numbering as well as Torque Specs, Timing Settings and Cylinder Head Tightening Sequences among other engine specs. 600-inch valve lift with great mid-lift flow numbers. I did research on them, but I wanted here from other people. I'm using L2300F - . These heads are identified by the casting number 049 and are renowned for their high performance and durability. Port shape, chamber design, and valve size […] Our largest and best flowing 24° big block chevy cylinders heads, these cylinder heads feature 100% CNC machined intake runners, exhaust ports and combustion chambers. Torque Specs » Gen VI Big Block Chevy Engine Specs return to Torque Specs Prev Page 1 of 1 Chevrolet Performance Bowtie street cylinder heads are designed for high-performance applications, with thick deck surfaces and high-velocity airflow passages. The heads are manufactured to precise machining tolerances. oem rectangular heads belong on nothing under 500 cubes or a high winding 7 grand application and then with a dual pattern cam that favors that poor exhaust flow. These are passenger car, small oval port, high velocity "peanut" port cylinder heads that are known for producing exceptional amounts of low end torque and the highest highway fuel efficiency possible on big block engines. These have 2. floating around: - The 1966 GM Find CHEVROLET 7-4L-454 CHEVY-BIG-BLOCK-GEN-VI Cylinder Heads In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! Cylinder Head SpecialistsOur medium sized 290cc oval port cylinder head is recommended for moderate street or street/strip big block chevys with displacements up to 509 cubic inches, operating at or below 6500 RPM. 301 Engine 350-455 Bolt, main bearing cap to block 70 lb-ft 100 lb-ft oil 20 lb-ft Bolt, rear main cap to block 100 120 oil 20 Bolt, cylinder head 85 95 * oil 20 Home New Kits Tech Manufacturing Search Rod Bolts (17) Cylinder Head (151) Engine Block (42) Intake System (7) Engine Component (10) Accessory (4) Driveline (21) Tools (17) Jan 18, 2018 · Buying big-block cylinder heads can get costly. To make sure you spend your cash wisely, here are a few budget-friendly options to guide you. If you use aftermarket performance bolts like ARP's, you should follow the recommended torque specifications. Aug 17, 2005 · i have a chance to buy a set of these cast iron heads. These BB-Chevy heads come in an As-Cast series or Full CNC-Ported series. The head has PASS noted on the casting. Nov 28, 2010 · I have flowed plenty of factory big block chevy heads, so here it goes. 72 100. Factory power rating was 290 HP at 4000rpm and torque was 410 ft-lbs at 3200rpm. Best suited for +540 cubic inch large displacement racing engines, operating at or below 7600 RPM. • P. php Here is a link to big block chevy heads with casting numbers and cc data. Mar 1, 2008 · Check out this 496 Chevy Big Block Engine get tested with Edelbrock Performer RPM Cylinder Heads and Dart Cylinder Heads other cylinder heads are TFS, Brodix, GM and Pushrod, Featured in Car Craft Apr 6, 2008 · I believe this is why some people get confused by the head volume. But it will give you correct intake and carburetor numbers and correct camshaft specifications. i ve been researching this site for a couple of months now and its GREAT. a big thumbs up to all involved!! Notes These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. These cylinder heads feature a valve angle that is rolled two degrees. Heads 1964 - 1990 Identification A Big Block Head Scrape the oily goo off and read the letter at the lower left corner of the head, near the #1 or #8 spark plug hole, a letter about 1. 19 1. 19 intake valves are installed. But, we wouldn’t be doing our due diligence if we didn’t provide a proper overview. Not very good heads for performance applications but ok for everyday driving. There are three different versions of it, Gen 4, 5, and 6 or Gen IV, V, and VI if you like Roman numerals. 19 intake and 1. Lists them as coming on 70-78 402 and 454. May 7, 2012 · It has the specs for all the parts listed in a Big Block Chev. net May 10, 2014 · I know this question has probably been asked a million times but there appears to me to be a lot of conflicting info. Does anyone know if the passenger head is any different than a truck head Apr 22, 2024 · Mark IV 454 | LS-5 454 Specs | 454 LS-6 Specs | LS-7 Specs The 454 big block Chevy was the last engine in the Mark IV family to be introduced. Search Car Torque Specifications by Engine or Model Feb 17, 2009 · yes I know several types of head gaskets say install dry use of the copper spray has never once caused a problem Big Chevy PONTIAC APPLICATION TORQUE TORQUE LUBE INCRE. Below is a test of a very mild application with the factory rectangular heads compared to a set of 2. Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads. i know that they are rec port/closed chamber, but thats about all i can find. The Chevrolet big-block engine is a series of large-displacement, naturally-aspirated, 90°, overhead valve, gasoline -powered, V8 engines that was developed and have been produced by the Chevrolet Division of General Motors from the late 1950s until present. The most important improvement is that the exhaust ports are in the stock location eliminating header or manifold interference. The date code is irrelevant unless you’re really trying to re-create a piece that matches some original documents and sales dates. So the short bolts and the Mar 6, 2008 · The 781 and the 049 are virtually identical, both great heads. Moly and other lubes offer reduced friction and increased bolt tension, which will affect the torque figure. It was available from 1996 to 2000 in 2500/3500/3500HD trucks and 2500 Suburbans. Choosing big-block cylinder heads depends entirely on the application. Jan 14, 2009 · Edelbrock CNC Victor Edelbrock's CNC-ported Victor head offers the largest port volume of all the heads we've tested and also offers the highest flow numbers at 0. 0 cc. 72 valves) I hear most closed chambered big block heads are good up to 6000 rpm. Included are Head Bolt Torque value. Nov 16, 2011 · Aluminum aftermarket cylinder heads offer tremendous airflow potential to maximize power potential. Thinking starting with the "112cc" nominal chamber and shaving them to say 108cc or there about Jul 20, 2024 · The 049 BBC Heads refer to a specific type of cylinder head used in Chevrolet Big Block (BBC) engines. 5" high indicates a big block, while a number indicates a small block. We manufacture and sell more aftermarket aluminum cylinder heads than anyone else in the business. Our large inventory and huge warehouses allow us to offer some of the best prices around. They like bigger valves 2. com Chevrolet Big Block Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2. The out-of-the-box version is available in three port volumes, 327 cc, 345 cc or 363 cc, with CNC ported Aug 25, 2020 · 3964290 Manufacturer: Chevrolet Category: Cylinder Heads Type: Big Block V8 Date: 1969-1970 Notes: oval port, closed chamber, 396, 402, 427, 454, 101cc chambers Have you ever stopped to think and forget to start again?? 69 Chevelle, 502 Big Block, TH400, 12 bolt 4:11 pos. Any help would be great P. 88 exhaust OVAL PORT - Valve size 2. 30 over forged pistons if it matters any Cast Iron Small Block Chevrolet Compatible Blocks Available Through BRODIX® Instructions (click here) Big Block Chevy Compatible Block Instructions (click here) Oct 1, 2006 · Just curious on what rpm they're good up to? (stock unported with stock 2. But which ones are better In conclusion, the 10114156 Big Block Chevy Heads from Chevrolet are a high-quality, performance-driven upgrade for your Big Block Chevy engine. 25-inch bore as the 427, but with a longer 4. This is the quickest, easiest way to get the The BRODIX Head Hunter series represents the cutting edge of conventional big block technology. The Edelbrock #60455 Performer RPM O-Port cylinder head is designed for Big-Block Chevy applications. Know a guy with a set of Sep 12, 2012 · C1 & C2 Corvettes - Torque spec for BB aluminum heads - What is the recommended torque spec for 1968 factory big block aluminum heads on a cast iron block? NOTE The BRODIX BB-3 X TRA has taken the conventional big block to the next level. 290s are closed chamber, 049s open chamber. 290 & 049 heads have oval ports. the 990 heads are the best flowing heads for the big block chevy. and any thoughts/opinions on them. Yours were cast on October 6th, 1974 and were used in the 1975 full size or Corvette. Oct 17, 2022 · Do you wish to know the casting numbers for big block chevy? Find out everything about casting numbers with our detailed chart and more. 88 exhaust maybe do a little port work below the valves, match the intake ports and intake manifold to the gasket and go with them. Feb 20, 2019 · Factory big-block Chevy heads were offered in both aluminum and cast iron, both open- and closed-chamber designs, and oval (passenger car) or rectangular (high performance) intake ports. 72 exhaust Apr 11, 2015 · Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. What is the true cc of the 049 bbc heads? I read every thing from 113cc to 119cc to 122cc. Nov 2, 2005 · I need help finding specs on theses heads. These cylinder heads meet GM’s stringent quality standards and provide excellent service and durability not found in used cylinder heads. If restoration is your goal, your choice is limited to locating the correct casting for your original engine. Oct 11, 2017 · http://www. these are bare heads that were supposedly magnafluxed and found to be in good shape. May 2, 2006 · I have looked high and low but cant find and estimated cc rating on a bbc O port head The casting number is 6272292. We've compiled some history and a massive library of parts swap knowledge into a comprehensive resource. Hope this helps. Always thought they were basically same head as the #049 which alot of places have listed also at 113cc, but due to a recent post seem to be more like 121cc. Enhance your V8 engine performance with our 4L 454ci 781 BBC Cylinder heads. The only problem is it was printed in 1996 so it is a bit outdated unless it has been reprinted since then. It’s best known for its use in the 1970-1974 Corvette, but it’s also popular in the Caprice, Chevelle, and El Camino of the same era. Are you looking for BBC torque specs and other technical information? Below are answers to common questions about the BBC torque specs and more. . They both flow in similar numbers until . The Edelbrock #60455 Performer RPM head is perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. 3931063 1969 396 325, 350 2. Reply Like GM 7. Over 6,000 Automotive Torque Specs. 19 & 1. The -3 X TRA is available in a rectangular-shaped or oval-shaped intake port configuration, and two of them are offered completely CNC ported. Casting Number/Date for Big Block Iron Heads Available from Tracy Performance. Open-chamber designs are larger and provide lower compression ratios, so require a much larger piston dome to achieve the same compression as a closed-chamber head. Only Chevelle-specific information is listed here to conserve space. Jan 6, 2015 · The Chevrolet 454 big block was introduced in 1970 and is still available today as a crate engine. Big Block Chevrolet Compatible Heads From innovative design to precision manufacturing… BRODIX is serious about quality and workmanship at every step of the process. O. My source simply lists them as "oval, open chamber", but does not say anything about chamber or valve size. Big Block Chevrolet Compatible Heads BRODIX is the undisputed leader in big block Chevrolet compatible technology. We have some of the lowest prices on Chevrolet Performance Parts, Chevrolet Performance Engines, and Chevrolet Performance Transmissions. I am going to buy them no matter what because of the price. Our largest and best flowing 24° big block chevy cylinders heads, these cylinder heads feature 100% CNC machined intake runners, exhaust ports and combustion chambers. It debuted in 1970 using the same 4. 3" intake/1. Big block Chevy, "semi-open chamber head", combustion chamber volumes from 109cc, 112cc, and 113cc Oct 3, 2009 · The piston is an L-2349F. See full list on cartechbooks. Apr 13, 2004 · What is the actual combustion chamber size on #781 big block cylnder heads???? Most places have them listed at 113cc. Ed Best Big Block Chevy ( BBC ) 781 Heads, Year:73-84 for sale at AlliedmotorParts. # 336781 made between 1973 and 85. 00-inch stroke. 640" Gasket Bore - . 06/1. Dart offers options galore, including assembled and bare configurations, varying chamber sizes to suit specific engine requirements, CNC or as-cast ports, and much more. Conventional style cylinder heads are available in 26º, 24º, and 20º valve angles, and spread port heads are available in 18º, 16º, 14. May 5, 2008 · I'm confused. :hurray: Chevy specs are 65 ft-lbs for the short bolts and 75 ft-lbs for the long. This heads would be especially good on a larger displacement big-block in the 502ci and larger range with a big roller cam. Feb 7, 2010 · Re: rect port head casting number 3964291 For the most part. This cylinder head delivers great throttle response and power from 1500 to 6500 Tech Library Big Block Chevy Blocks Installation Instructions: Dart Big M Aluminum Big Block – Technical Notes Dart Big M2 Mark IV Iron Big Block – Technical Notes Sleeve Removal & installation instructions: Dart Aluminum Big “M” Sleeve Installation and Removal Procedure Big Block Chevy V8 - BBC - Engine Specifications 396-454 CID - BBC Firing Order Torque Specs Always torque bolts in three equal increments Bolts or Parts Lube or Sealer Torque to: Main Caps The PRO1 24 Deg 325cc delivers increased airflow at high valve lift for high RPM, big cubic inch engines, and still remains compatible with off the shelf pistons, valve train components, and intake manifolds. The sheet with the ARP bolts says 65 ft-lbs for bolts with sealer (the ones that go into the water jacket, which is all of them on a BBC). 850 exhaust valve. 4L V8 is an exciting engine that also offers tons of potential. Best for big cubic inch, high RPM use. Thread the stud into the cylinder head before the head is installed. How To The Edelbrock Performer RPM Street Cylinder Head is designed for street high performance use, and is interchangeable with any early-style (1965-75) large oval port big-block Chevrolet cylinder head. 880" exhaust valves. Chevy 396/402 big block performance, history, specs, and variants. In this guide, we discuss Chevy 454 Big Block Chevy Head Bolt Torque Specifications Long Head Bolts 75 - 80 Ft/Lbs Short Head Bolts 65 - 68 Ft/Lbs Nov 22, 2010 · Factory big-block Chevy heads were offered in both aluminum and cast iron, both open- and closed-chamber designs, and oval (passenger car) or rectangular (high performance) intake ports. No matter how large or small your racing operation is, we are glad to be a part © ChevyWorld. Oct 2, 2008 · BTW if your looking into aftermarket performance cylinder heads for the BIG BLOCK CHEVY, the blocks have different coolant passage lay outs, and require matched heads and head gaskets , but check with the manufacturer of the cylinder heads, many of the better aftermarket big block heads have been modified with a larger sealing surface areas and The big block Chevy is one of the most raced engine platforms in motorsports. I work for gm in the high performance research and development dept. The BoxWrench Engine Specs Database is a community resource for mechanics of all skill levels to access a reference library of Firing Orders, Distributor Rotation Directions and Block-Cylinder Numbering as well as Torque Specs, Timing Settings and Cylinder Head Tightening Sequences among other engine specs. Box 1347 Mena, AR • 71953 General Instructions for Big Block Chevy Compatible Heads Finally, the most user-friendly big block head on the market has been developed. Chevy’s big block engine is a series of large-displacement, naturally aspirated, 90-degree, overhead valve, gas Oct 4, 2005 · 781 is not hte best flowing heads. 88 valve 049's. Chevrolet Performance Bowtie street cylinder heads are available in either rectangular or oval intake port configurations. 88 and a little bowl work Lots of the guys at Team Chevelle run 10s with these heads. there suppose to be 113. Visit Our "What's New" page to get all the latest Chevrolet Performance News, Announcements, and Specials. Additionally, there were many different castings and two INSIDE HEAD STUDS When installing Dart’s Inside Head Stud & Shoe Kit be sure the shoe and the 7/16" end of the inner head stud slide into the machined pocket in the block. I think in most street applications, the 049's are going to stand up to the rectangular heads pretty well. Jun 3, 2006 · Putting the heads on the motor this morning. Do these have the cutaway quench area around the exhaust valve like the 820 heads Dec 14, 2021 · Difference in Big Block Gen 4, 5, and 6 Engines What exactly are the differences between the generations of big blocks? The big block Chevy engine, AKA BBC, AKA Rat Motor, has been in production since 1965. Features 100% CNC machined intake runners , exhaust ports and combustion chambers; capable of flowing 375 CFM at 0. They have custom designed a head to meet the demands of the Big Block Chevy world, while keeping the quality high and the price reasonable. With over 50 years of history to unpack, the Chevy 454 7. First you need to decode the date. Mar 15, 2013 · My max performance big block chevy book says: for street use a good starting point is large oval port 781, 049, 359 or 241 castings. Aug 24, 2022 · The large cubic inch size of the big block Chevy engine made it a powerful option in both Chevy cars and trucks for over 40 years and is still popular today. Feb 20, 2008 · As for the 088 heads compared to a set of 2. Some have an additional letter (an A or B), about 1" high, right next to the letter (or number). Dec 6, 2023 · Introduction Casting Numbers, Casting Dates and Marks In-line 6 Cylinder Heads Small Block Cylinder Heads Big Block Cylinder Heads Introduction The three different engine designs used in first generation Camaros all required different cylinder heads: the in-line six-cylinder (L6), the small block V8 (SBC), and the big block V8 (BBC). BRODIX is now manufacturing a cylinder head that bolts directly in place of stock cast iron heads allowing reuse of the intake manifold and pistons. Anyone know what the torque should be using arp lube? I think it was 55ftlbs but I want to be sure. on the head bolt torque for the big block Chevy. 400 lift when the 049 head will flow better at higher lifts because of less valve shrouding. These heads are 100% CNC ported and utilize features such as raised, oval-shaped intake ports that flow an amazing 489 cfm and up and newly designed exhaust ports that flow 335 cfm with only a 1. Jul 27, 2022 · Complete Cylinder Heads Guide for Big-Block Chevy Engines - Pt 1 The big-block Chevy’s canted valve heads are largely responsible for the tremendous power capability of the Rat motor and its continued popularity. 5º, 12º, and 9° versions. Get big power on a small budget with BluePrint Muscle Series cylinder heads! These lightweight aluminum heads bolt up to your big block Chevy and feature 316cc intake/124cc exhaust runners, 119cc combustion chambers, and 2. Don't miss out on this opportunity to enhance your engine's capabilities with our high-quality, 454-cylinder heads. All I have found is it was on the 402 and 454 motors. Nov 14, 2008 · below is the standard intake on tall deck block showing why spacers are required, to allow proper port alignment with the heads spaced further up and out from the crank center li ne. Dec 20, 2019 · Someone I know with these heads and Speed Pro pistons L2307 large dome LS7 type piston is is hitting. The NHRA engine blueprint specification guide lists the stuff pretty well, although they do allow for swapping of heads, meaning you can put a 291, 391, 840, or 858 head on any closed chamber iron head big block. I just scanned the paper and found a set of 336781 from 1975 for sale for $50 for the pair that probably need the valve job too. Their durable construction, optimized port design, and improved combustion characteristics make them an excellent choice for both street and racing applications. ProMaxx heads have started a revolution in the performance world. I am in the process of building a 427. Feb 1, 2011 · Found someone selling these BBC heads - casting # 6272292. I would get them cut for 2. The Race-Rite® rectangular or oval Oct 15, 2006 · My buddy threw away the box accidently and we are trying to put his motor together right now. Feb 3, 2020 · Are they worth rebuilding? I'm looking into heads for my 454 with seal pro hyper pistons H518cp. 250" intake/1. 4L-454ci-V8-MARK-IV Engine Torque Specs. From restored bone-stock vehicles to all-out drag vehicles, it serves many purposes. Jun 12, 2008 · i have a set of big block heads cast# 063 off a 69 chevelle and i want to know how good do they flow their going to sit on a 402 with trw . Our offerings include the PRO1, PRO2, Big Chief, and Race Series heads. 06 intake and 1. Upgrade your big block Chevy with these BBC 049 heads for sale and experience a significant boost in performance. Although my user name is Januarymopar, because I am a Mopar fan, I do now own a Willys pickup with a big block Chevy engine so I need to do alot of homework so I don't screw this engine up. 700" of lift. Jan 17, 2025 · Also known as the Vortec 7400, the L29 was the final and most modern iteration of the venerable big block Chevy. 06 intake, 1. Dec 9, 2021 · Hi all, I'm trying to figure out what parts I've got and pulled the 346246 number off the heads of my big block. They need a total valve job. There appears to be two specs. Jul 19, 2023 · Chevrolet’s big block engine doesn’t need an introduction, especially for this crowd. 967 Similar to #3909802 & 3917215 with two accessory bosses above #3 (or #6) exhaust ports for air conditioning rear support bracket Chevy casting numbers for blocks and heads for big block V8 engines. com/bbcmenu. Product Details SERVICE REPLACEMENT HEADS Chevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later GM Big-Block 454-cubic-inch and 502-cubic-inch engines. 88 valve 049 heads, It depends on the RPM range/cam specs. They're fully assembled with valve springs, retainers, locks, guideplates, studs, and seals. 041" Compressed Thickness - 11. May 24, 2011 · Felpro PermaTorque MLS Head Gasket - Big Block Chevy 1965-84 396, 402, 427, 454, 502 - 4. 880" exhaust valves Chevelle V8 Cylinder Head Casting Numbers - 1964 through 1972 These head castings were used in various other models of the Chevrolet lineup such as the passenger car, Chevy II/Nova, Camaro and Corvette. 72 exhaust valves, 113cc's and take the "peanut" style spark plugs. This is for factory iron heads using factory head bolts BTW. It’s a certified staple of street cars, trucks, race cars, and all sorts of performance vehicles. Big-block Chevy factory heads are offered in aluminum and cast iron, with either open or closed combustion chambers, and with oval or rectangular intake ports. Dec 31, 2009 · OK, anyone have any comments on the flow/performance differences between the 820 open chamber oval heads compared to the 049 and 781 heads? Thinking the runners are approximately the same size. Aug 19, 2011 · 336781's are 1975 low performance (smog) heads used in the 454/215. Was just wondering 301 Maple Ave. S. Big Block Chevy Cylinder Head Big Block Chevy cylinder head, bare casting, cast iron, 320cc intake runner 119cc combustion chamber, 2. 030 pistons. This is especially true when 2. My desire is to end up somewhere close to 10-1 CR. nastyz28. Read on! Edelbrock Performer RPM Cylinder Heads Cylinder Head, Performer RPM, Aluminum, Assembled, 110cc Chamber, 290cc Intake Runner, Chevy, Big Block, Each See More Specifications Mar 29, 2006 · My motor came with a set of heads #353049 from 1973. anyone know valve sizes, and weather they'ed be good street performance heads when equiped Nov 18, 2010 · Big block Chevy, "closed chamber head", combustion chamber volumes vary from 97cc, 98cc, 101cc, 107cc.