799 heads came on what motor

Additionally, these heads were used in some Camaros and Pontiac GTOs as well. WE HAVE OVER 2,000 CYLINDER HEADS IN STOCK READY TO SHIP! I am searching for all these at the local JY but am torn on what way to go. Simply put, the Gen III is easy to swap and cheap, and the Gen IV has better heads and more complexity. Call us today. Hi, im going to put a L33 in my 1973 C10 shortbed. These heads are said to be basically the same as the 243 head everyone gets a boner for. My son and I are looking for the L33 now for a swap into his 1992 F150 extra cab short bed. All together, it is easy to see why these 862 heads are such a sought after choice when looking to upgrade or replace older components on your LM7 engine. The size of the valves affects the performance of an engine. For performance-minded automotive enthusiasts, the GM LS3 L92 6.0L 6.2L Cylinder Head Assembly 821 Square Port Genuine OEM is the ultimate upgrade in power and strength. The main difference between the 243 and 799 heads is that one was designed for GM engines, while the other can be used on various engines from different makes. In 2008 and 2009, Chevy also had a simpler 5.3L engine designated the LH8, which can be identified by the letter L in the 8th digit of the VIN. What heads came on LQ4? These cylinder heads were originally designed for various models of Chevy vehicles and are compatible with LM7, LR4, and LM4 5.3 engines. Is It a 4.8L or a 5.3L Engine?Spotters Guide. If the engine is going in a lighter car with deep rear-end gears and a high stall converter, you can be more aggressive with duration. 280k miles. This means that it has plenty of power to tackle any job you can throw at it, whether youre commuting on the highway or taking your truck off-roading for some fun in the mud. The combustion chamber is the space in the cylinder where the air/fuel mixture is ignited. Not surprisingly, the 799 heads flowed the most, with an impressive peak flow of 250.2 cfm when tested at 0.700-inch lift - that's over 13 cfm higher than their nearest competitor! Next to the 706 heads, the 799s featured the smallest combustion chamber at 64 cc. The peak flow numbers differed by just 7 cfm at 0.700 lift. Some trimming of the intake and alternator bracket may be required. Aug 27, 2022 / The factory fuel pump will become a limitation around 430 whp, so you should plan on upgrading thefuel pumpas well. Im also thinking of 102mm intake manifold. Although the cylinder heads were made originally for the 3.90-inch bore, they fit perfectly on 5.3L and 4.8L blocks (3.78-inch bore). That will determin what pushrod to go with. But on the upside, both respond equally well to porting. As a result, they have become some of the best performing cathedral port factory heads available on the market today. To put it simply, Chevrolet Performance's LSX 454 crate engine is a powerhouse. There is some debate on iron vs. aluminum from a power standpoint, but the reality is the internal rotating parts are going to fail before the block does, so if you can score an aluminum block, take the weight savings. However, if you're planning to drive in hot weather or at high altitudes, you'll need an engine that can handle harsh conditions. The 5.3L debuted in 1999 as the base engine for the Silverado and Sierra truck line as the Gen III until 2005 when the Gen IV appeared. You will sometimes hear the Vortec engine referred to as LS because the basic engine design is the same. The main difference between the two is from which mold casting the two cylinder heads originally came. The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. [] L33 5.3L Engine Upgrade Guide: Expert Advice for L33 Mods to Maximize Performance []. (Solved). The 706 heads were simply better than the 799 heads through most of the curve. Hi, Im looking at putting an L33 into a Barbarian V8 motorcycle custom built to take an LS engine, it will be married up to a single speed direct drive gearbox, will not be able to use its usual intake due to space under the fuel tank so what would be the best lowest profile intake/throttle body unit I could use without sacrificing performance, what would the best cam to use given the direct single drive, like the lumpy sound yet be a daily driver, Frame in transit at the moment so just looking at a direction to go with its powertrain. Dont mind a little downtime? This is due to the larger exhaust port volume, which allows more fuel and air to enter the combustion chamber than necessary. The L33 engine block has a 3.780-inch bore diameter. The specifications are almost identical; therefore, the cylinder heads are fully interchangeable, and they offer the same power output. The cylinder cast architecture is with a semi-permanent mold method. Having tested endless aftermarket and ported stock LS cylinder heads for our sister title Hot Rod, it seemed odd that the stock stuff was never included. The 5.3L engine is reliable and incredibly versatile, making it a great choice for anyone looking for a powerful yet economical engine option in their vehicle. As expected, the 799 heads offered the highest peak flow, with 250 cfm coming at 0.700-inch liftthough a value not generally relevant to most LS enthusiasts. I like the idea of 100 hp with a BTR 550 lift it has 799 heads but was thinking AFR mongoose with upgrade trunion and springs. The extra cubes bring boost on quicker which means you can use bigger and more-efficient turbos. Valve Size: Intake - 1.89, Exhaust - 1.55, Port Volume: Intake - 197 cc, Exhaust - 69 cc, Chamber Diameter (distance across): 3.756, Valve Size: Intake - 2.00, Exhaust - 1.55, Port Volume: Intake - 199 cc, Exhaust - 71 cc, Chamber Diameter (distance across): 3.821, Port Volume: Intake - 212 cc, Exhaust - 76 cc, Chamber Diameter (distance across): 3.923, Port Volume: Intake - 209 cc, Exhaust - 74 cc, Chamber Diameter (distance across): 3.876. They have stronger wristpins, thicker ring lands, and the added valve reliefs allow you to run big cams. Apr 26, 2023, 2:58 AM PDT. Can anyone supply overall dimensions for the Ford 5.3L (all aluminum)and the Ford 2.3L Ecoboost (turbocharged)? Awesome article!! The 5.3 "LM4" is what I have in my Rainier and it had a short production run and was used in the 03-04 GMT360 vehicles and the SSR. Vin.Seventh digit is 7. This reduces expense when you build it up. The power output can swing up to around 3 4 percent, delivering about 25 horsepower (hp). The #799 cylinder heads are reportedly the same casting as the LS6 and LS2 #243 heads, minus hollow exhaust valves and high-performance valve springs. Is this an error on your statement of facts about the specific vehicles it was in or do I have something special? The 241 heads performed slightly better than the 317s, and the 799s were better still. Check outPart 1andPart 2of our LS Spotters Guide.]. The 243/799 heads have cathedral ports with improvements destined for the LS6 Corvette and later the LS2. However, some cylinder heads come with an architecture that hinders the engines power output. im looking into getting 600whp will the stock heads get me this with a 80mm turbo? The799 headshave an aluminum build that can withstand high temperatures. SMASH THAT SUBSCRIBE BUTTON! What made the 317 heads both kissed and cursed was the combustion chamber size. The 243-cylinder head has an intake port volume of 210 cc and an exhaust port volume of 75 cc. While a smaller combustion chamber increases the compression ratio, the bigger one reduces the compression ratio. Spring life isnt a problem because trucks generally dont spend a lot of time at high rpm. This powerful engine (part No. Whether it was a Corvette, Camaro or Pontiac GTO, the 243 heads provided superior performance no matter what vehicle they were installed in. They are built with sophisticated architecture, including a cathedral-shaped port with smaller combustion chambers. For many people, selecting suitable cylinder heads can be pretty tricky. The 0.600-inch lift, or possibly the 0.650, numbers were more relevant, but the 799 heads still shined here with flow readings of 248 cfm and 249 cfm, respectively. That, my friends, is another test for another day! The799 and 243 casting Cathedral-port cylinder heads can be CNC ported to flow close to the aftermarket heads. [Editors Note:This L33 engine upgrade guide is part of a series ofLS engine upgrade guidesassembled by a team of LS experts at Summit Racing that we are sharing at OnAllCylinders. Or they had them in stock at the factory and used them till they were gone! These cylinder heads feature a rectangular port design, which is also found on 6.0L truck engines and the Pontiac G8 6.0L engine. Keep in mind, if you're running a cam in the 230 range, piston to valve clearance needs to be checked and fly-cutting may be required. This specific guide is for the GM LC9 5.3L engine. Heads and intake good for another 50+ hp. Youll be knocking on 400 whp which is where the stock injectors max out anywayso its a fairly inexpensive proposition for the power youll be making! when the piston is at the bottom dead center (BDC) and to the volume when the piston is at the top dead center (TDC). The 799 and 243 casting Cathedral-port cylinder heads can be CNC ported to flow close to the aftermarket heads. Putting a truck cam in puts you in the zone by itself. ), Why Do People Cover License Plates? Though they offer plenty of flow, they also started with a huge drop in compression (from 9.5:1 to 8.3:1), and therefore power. have an aluminum build that can withstand high temperatures. I HAVE A 2011 SUBURBAN LT Z71 4X4 AND IT HAS THE LC9 WITH 799 HEADS. Another factor to consider is whether or not the heads have been ported and polished. I am swinging back and forth with LQ9, L33 or L92. Second was to procure a test mule. Truck engine bays make fitting turbos easy. The 799 is basically the successor to the 243 without any significant changes. Common F-body computers will work for a swap with transmission controls built into the programming, making them a cheap and easy swap for a C10 or drift rod. I just bought a low mileage L33 with only 53k on the clock. The injectors are only 25 lbs. Batten, followed by several years developing performance pistons at Wiseco Piston Co. Today, Brian develops performance parts for Summit Racing Equipment and is a regular OnAllCylinders contributor. ALSO make sure to hit the bell to get notified when we go live.THANKS for watching! Modifications usually start with acold air intake and aftermarket exhaust. Why Chevy 706 Heads LS Make a Great Choice? Knowing youre running high octane and having the before-mentioned 160-degree thermostat opens up the tuning window. The aluminum 5.3-liter truck engine has 799 heads. Although there was only a 2.5 cc difference in chamber volume between the two models, this did not result in an increase of power on our test engine when evaluated on a dyno - suggesting other factors are also important to consider when assessing performance potential. Swapping a L33 into a 96 Silverado with a fresh NV3500. . Given the minimal difference in flow and lack of power production, the 241s don't seem like much of an upgrade over the 706 heads. Stumbled across a 2005 ext cab Silverado. Looking for 400+ hp at the wheels naturally aspirated? They come with smaller chambers compared to some of their counterparts with rectangular ports. The 243-cylinder head is made from lightweight aluminum, which helps reduce overall weight without sacrificing power or performance. They are okay naturally aspirated, but are the weak link with boost and you probably know a guy thats popped one. If youre gonna do a L33 swap into anything you may may as well leave the 799/243 heads that come one it. Meanwhile, some vehicle enthusiasts and professional auto mechanics opine that swapping to 799 heads is worth it. This particular cam offered an impressive 22 lb-ft increase in torque when compared to other cams available for the 5.3L, peaking at 4,400 rpm before falling off again. The accessory drive will swap over, but theres a chance youll need to drill and tap one of the holes for the alternator bracket. Wont really be a daily driver but a toy I can get out and turn heads with. Both the 243 and the 799 cylinder heads are General Motors' 3rd generation cylinder heads designed for V8 trucks, performance engines, and SUVs. This cylinder head also has a compression ratio of 9.5:1, which allows for improved fuel economy levels without sacrificing too much power output from your engine. Dyno testing revealed that at certain lift points, the 799 heads were able to outflow their predecessors by as much as 20 cfm. The alternator, sometimes called a generator, generates electricity to charge the battery and power all the electric auxiliaries while driving. The 799 cylinder head was mostly used on the L33, which is the aluminum block version of the LM7. It is the Lt model and the 8th character of the VIN is 7. . The flat-top L33 pistons added some much needed compression. The intake is the factory Gen IV truck manifold and will be run using a stock computer and HP Tuner software. When ChatGPT was released to the world in November, most of us marveled at its ability to write rap lyrics and cover letters and high-school English essays. The cylinder heads perform amazingly on the truck engines. There are a few other parts needed for a L33 cam swap such as an LS2 timing chain, LS7 spec lifters, LS2 timing chain damper and thick-wall chromoly pushrods. What intake should I use? This was an aluminum blocked engine that had the 243/799 heads but didn't have AFM/DOD or VVT. Sometimes referred to as the LS6, the LQ4 is a 6.0 litre member of General Motors' Vortec engine family. Ultimately, its up to you to decide which cylinder head best suits your needs. The head gasket bore diameter isnt optimal, but with careful tuning and race fuel it can withstand 850+ whp. The 799-cylinder head also weighs 26 lbs, the same as the 243 one. They will have better cylinder heads and floating piston pins, so they are reusable for a good low-budget build where you throw a cam, studs, and boost at the engine. Drop a LIKE if you LIKE! If it's not done correctly, it can decrease performance. Just get an LQ4 literally the only difference between that and an LQ9 is the flat top pistons of the LQ9, just means you can run more boost on an LQ4! The Coefficient of Discharge is a calculation of the airflow versus valve sizing, and gives a much more accurate picture of the power potential of these heads. The 4.8L has a 3.27-inch stroke, and the 5.3L has a 3.62-inch stroke. The Gen III have 862/706 Gen III heads, and the Gen IV have 243/799 heads. This helps to guarantee whether the channel of the cylinder head is reliable. Year Range: 97-04. With its aluminum construction, this assembly boasts maximum heat dissipation while still providing a lightweight design that won't bog down your engine's performance. lift cams are popular, but LS6 springs allow you to run .550-in. It connects the intake manifold with the cylinder heads. LS engine spec guides and LS-relatedinformationhere. 799 heads (65cc chamber and 210cc intake runner) are pretty much 241 LS6 heads worked over for truck. Sometimes referred to as LS3 heads, L92 heads are renowned for their superior performance capabilities. The Gen III has the 24x reluctor on the crankshaft and can be run with a cable-driven throttle body and factory computer. The aluminum blocks have Siamese bores with sleeves that are bonded to the block, and other enhancements, making them durable for boosted power. Though the lower compression might make them attractive for the turbo (or blower) crowd, there is a big gap in power that must be overcome before the 317s can start making more power than the standard 706s. The Gen III block can be iron or aluminum, and you will see 4.8/5.3L cast into the front of the block. The exhaust port volume for 799 LS heads is 74 cc. Im looking for a cam suggestion to run with a a manual (Muncie M20) thss as t will d SD puns wicked at idle and snap your head back when floored. The cylinders can be bored to the LS1/LS6s 3.905 inches, but its recommended that you leave them as thick as possible with common .020 /.030 / .040 in. Furthermore, even if you do decide to switch out the heads, there would still be no difference in horsepower output. This offers drivers an extra boost of performance without having to make any major modifications or upgrades to the engine itself, meaning you can experience improved acceleration and better fuel economy right away! Thanks. If you upgrade and depending on the injectors you run, you may need a fuel injector adapter harness. The 799 head flow supersedes that of 706 heads with as much as about 20 cfm at specific lift points. Ask your tuner what injectors they prefer and have them ready to save yourself an extra trip to the dyno. Although an iron block 5.3 will handle more power, the L33 can still support over 850 whp. Still can drive daily. If you have a Gen IV short block (no heads), you can find an equally cheap set of 862 heads and do a valve job and port job to get both compression and airflow. In terms of cylinder heads, we included the 706 small-valve 5.3L heads, the 241 (LS1), 317 (6.0L truck), and 799 (as a stand-in for the hallowed 243) heads. A better option is the Chevy Trailblazer SS or the 2007.5+ NNBS truck intake. The head is designed for use with four cylinders but can be adapted for use with up to 6 cylinders if necessary. Plug-in programmersare easy to use but have limits. For many people, selecting suitable cylinder heads can be pretty tricky. Want to dress engine up. (Information for this article originally appeared in thisUpgrading the Gen. 3 5.3L, Aluminum Block, LS Truck Enginearticle atSummit Racings searchable database of FAQ tech info. That can change if the heads are milled too. The stock rockers are good up to 175 lbs. If so, what would you recommend? This automatically leads to inefficient combustion with reduced power output. The exhaust port in an engine is just as important as the intake. While large combustion chamber reduces the compression ratio, smaller combustion chamber produces more power due to increased compression ratio. The valves on each type of cylinder head can vary. The valves are responsible for letting air and fuel into the cylinder and the exhaust from that combustion out of the cylinders. While they are similar to 2004 LS2 heads in terms of triangular casting, they do not require cleaning like the 243 heads. It marked a significant milestone in GM's LS series engines as it showed that adding a supercharger could result in incredible power gains while still retaining its reliable nature and longevity. The exhaust valve is responsible for expelling the burnt gases off the combustion chamber of an engine after the power stroke. Cam Motion ground the cam with 223/229 duration at 0.50; 596/596 lift on an LSA is 117. It still has the same 24X reluctor ring, cam sensor location, knock sensor location etc. Not surprisingly, the 706 truck heads offered both the smallest port and chamber volumes. I got the diameter but Im needing the length. This combination allows for ample airflow and optimal burning of fuel, resulting in an increase in performance output compared to many other stock cylinder head designs available on the market today. I am also looking fo a tbss or 07 NNSB intake. Its V8 configuration also provides an efficient combination of power and fuel economy, so you wont have to worry about breaking the bank when refueling after a long day out with friends or family. So, in the debate of 799 versus 243 heads, it can be determined that they are completely identical and interchangeable with one another. They offer excellent performance with increased horsepower making it a preferred choice for a porting job. In addition to these applications, this port design can be found on Cadillac CTS-V models and the LS9 in the Corvette ZR1, giving further evidence of its exceptional quality and power output potential. The 243-cylinder head was mostly used on the LS6 and the LS2 engines. A higher compression ratio leads to increased power output, which also means increased heat inside the engine. As you have most likely caught on by now, these two cylinder heads are practically the same. This might be another good indicator on how well they work on the small-bore 5.3L. For example, Corvette Z06 models feature 243 heads with sodium exhaust valves, which is typical for an L6 engine. oversize forged pistons. link to Alternator Overcharging - Causes and Fixes, link to LS Head Bolt Torque Specs and Sequence. The L33 swap is a pretty common one as LS1s are getting hard to find. If you are contemplating a porting job, choosing the 799 cylinder heads will be wise. Since inception, the 799 heads have offered superior performance and efficiency on the 4.8 and 5.3-liter truck engines. Ive got the engine tore down and ready to go to the machine shop. For fun, he runs his 427-powered C5 Z06 in ECTA land-speed racing, at OPTIMA street car events, and at a mix of autocross, drag racing, and track days. The 243 was created in a GM research laboratory, while the 799 was later adopted by other manufacturers later on. The aftermarket is strong, crate engines are available, and used motors are often cheaply sourced through junkyards. In-tank fuel pumps and external pumps are popular, but mild fabrication will be required. The compression ratio of 799 heads can cause a leap in a vehicles power output. A broken cylinder head can be Cylinder heads are the essential building blocks of an engine, and they play a vital role in the efficient operation 2020 Allied Motor Parts. However, you may also find some heads made from cast iron. The L33 is a returnless system. The exhaust port shape design is a D port which enhances exhaust flow out of your engine while minimizing backpressure buildup in your exhaust system. They come with all new stainless steel swirl polished 2.00 and 1.57 valves, new springs for up to .650 lift, new retainers, spring seats, and valve seals. Hey Allen, Cool ride! The Mini-Delphi/Multec II connector 25-pound injectors are a limitation at around 380 whp. Thanks. Engine Size: 5.7L - 350ci - V8. But, it also means more heat inside the engine. Which came out in the 2014 model years. A lot has been unveiled about 799 heads. The port volumes were within a couple of cc's of the 241 LS1 heads, and the peak flow differed by around 5 cfm despite the 706 heads having a smaller intake valve size. The 6.2 liter, 376 cubic inch engine churned out an impressive 638 horsepower, making it an ideal choice for those who demanded serious power and performance under the hood. The port shape is identical to the 243-cylinder head. Furthermore, this combination also ensures that the engine runs more efficiently than before while still remaining within emissions standards. Inside are ARP mains and head studs, and an M365 Melling oil pump. Furthermore, aside from the LQ9 which is simply a copycat version of the original LS6 design, these are considered some of best performing OEM cathedral ports ever produced by General Motors. Brian I have a 06 L33 4wd Silverado I am wanting to build it up a bit. If you plan on running a power adder or have a long list of upgrades planned, its recommended that you take your truck to a chassis dyno tuner who can give you a custom tune. The 799 LS heads boost horsepower up to 25 hp. Welcome to rxmechanic.com. Some of the most cost-effective and powerful heads available for 5.3L, 4.8L, and even larger 6.0L LS engines are GM's 706 Vortec heads. The decks are thicker to withstand more boost. Ever reference I have come across thus far designates that engine as being the LC9. The issue with milling them is you will have to remove quite a bit of material which can cause alignment and sealing issues with the intake . I have a 2013 Chevy Silverado 1500. Crafted from aluminum with a 61cc combustion chamber volume, these cylinder heads feature a cathedral-shaped intake port and an oval exhaust port. In many ways its the 327 of this era. Main studs should be added any time youre this deep in the engine. Learn how your comment data is processed. The sophisticated architecture with a cathedral-shaped port allowed 799 heads to offer amazing performance on truck engines. If you're going to be driving on the street, you won't need as much power as someone who will be racing their car. are some of the most popular heads used in LS engines. We recommend that you talk to your local chassis dyno tuner and decide on a computer programmer. Since LS and Vortec engines are so common, theyve become the go-to performance and swap engines of the modern era. Big 7/16-inch rod bolts will go a long way to keep things together over 7,000 rpm. All 5.3L NNBS motors either came with the 799 or 243 heads and flat top pistons. Luckily, these stock heads can be CNC-ported in order to increase the airflow and make them more powerful. An LS3 or LS9 cam makes good power, but not where you want it if youre using the L33 engine in a truck. Usually found in GM trucks, the LS engines with 799 heads come in two sizes: 5.3L and 4.8L. It is important to understand the differences between 243 and 799 cylinder heads, as they are two of the most popular cylinder head options for a Chevy. However, ensure to consider the pros and cons of swapping your current cylinder heads to 799 heads before a porting job. Hi Rick. If I keep my original crank and have the block bored .020 over with new pistons, do you think I could do enough modifications to the crank, intake, and heads to get this kind of power? Finding 799 heads for sale can be a challenge, but you can get your hands on the perfect cylinder heads for your needs with the right resources and patience. The cylinder heads intake port and exhaust port shapes are cathedral and D-port, respectively. Where Are Head Gaskets Located on an Engine? The 243 and the 799 cylinder heads are practically the same. I have the same year and the 8th character is a 7 also. Since these cylinder heads come with a smaller combustion chamber size than other options, you will need to mill them down a minimum of 0.025 inches in order for them to fit properly in your engine block. Something to keep in mind is the 2004 and later engines (even Gen. 3) had two head bolt lengths vs. three on the earlier engines. The cylinder heads come with a smaller combustion chamber, which in turn engenders increased compression and improved horsepower. Call us today. have a cathedral-shaped intake port. The 05-09 GMT360's got the LH6 and the 07+ will more than likely have 243/799's. Your email address will not be published. This was coupled with a 3.876-inch chamber diameter. Roughly in 2003, GM upgraded the LS into its Gen IV configuration with a number of changes. The L33 was built later, but was still a Gen. 3 engine. The chamber volume on the 799 heads was within 2.5 cc's of the 706 heads, but the. While this could be seen as a positive trait of the 799 head, its chamber volume was only 2.5 cc's different from that . Our testing showed this to be at least partially plausible as the flow numbers were similar, though not identical.

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