What did 243 heads come on
The 862 heads are inferior to the 706 heads in terms of compression, and they don’t also flow well like the 243 heads because it doesn’t have other competitive features; however, depending on your car’s needs and budget, the 862 cylinder heads might be a good port for you.05 and newer l33 aluminum 5.3 come with the 799 and I believe some vettes even had them on the ls2. The 243's came on the ls6 with sodium filled valves, and with normal valves on alot of the ls2 engines and very new 5.3's like 08+ iirc. 799 is basically a copy of the 243.
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Sep 24, 2015 · The base heads come with factory valvesprings, with three different upgrade options. All Stage 1 heads have factory valves and are milled and assembled according to owner specifications. Only new “317” cores are used for the larger chambered 6.0-liter casting, and “243” or “799” cores are used for the LS6.Scoring a 4.8 or 5.3 with 243 factory heads tomorrow. It's out of a 2007 Tahoe. I've been told that 4.8s didn't come with 243s only the 5.3s? Can anybody verify? I'm only paying $150 for the whole thing so I'm pretty happy. Also, is there a way without the vehicle vin to identify what it is...Sep 21, 2015 · These large-runner heads have a 12-degree valve angle, like stock, and are compatible with factory LS7 rocker arms and stands. The heads can accommodate 1.625-inch-diameter springs, and several are available. A 4.125-inch-or-larger bore is required. Base price is $1,130 each, fully assembled, through Summit Racing.Feb 13, 2020 · 706 heads are very affordable. 706 heads are plentiful and easy to find. 706 heads have smaller chambers, so you don't lose compression. 706 heads are slightly superior to 862 heads due to how ...The 243/799 heads made more power than the 317's in back to back N/A, and boosted, dyno pulls on the same motor. Sounds to me like you've already convinced yourself the 317 is the better head, so I'm not sure why your on here asking. Besides, from your post, headers are too small, so the head choice may be irrelevant.Location. Clarksville, TN. Posts. 198. 862 heads for a 4.8L ? Got lucky at a local junkyard and snagged a set of 862 heads off a wrecked z71 2000-2006 body style. thinking about building these (port n polish, roller rockers, valves n springs to go with a nice cam) to put on my 06 gmc 4.8L .799 LS Engine Cylinder Heads are some of the most recent cylinder heads on the automotive parts market. The cylinder cast architecture is with a semi-permanent mold method. The 799 cylinder heads are in the similitude to the 2004 LS2 cylinder heads due to the triangle casting marks similarity. However, unlike the 243 heads, they do not require ...GM LS6 CYLINDER HEADS CASTING #243 ONLY REBUILT STOCK HEADS. THIS SALE IS FOR CASTING NUMBER ENDING IN 243 ONLY CATHEDRAL INTAKE PORTS VALVE SIZES intake 2.000 ex 1.552 ... I'll give ya threefiddy, a jar of Vegemite and a box of boomerangs that may or may not come back. -- Olly.Some of the most sought-after cylinder heads for GM s LS engines are the 243 heads. They're often referred to as LS6 heads, as they were originally used on the 2001 to 2006 LS6 engine. These 243 heads feature a distinctive D-shaped exhaust port coupled with cathedral-shaped intake ports that provide better breathing capabilities and …51 posts · Joined 2011. #1 · Feb 22, 2012. Are the 5.7L 243 Casting Number Cylinder heads Direct Bolt on for a 4.8/5.3? StrokerAce03;5114860 said: Basically its just a bastardization of parts to create an oversquare engine that should scream at high rpm and rev to the moon. BE DIFFERENT.Part#: ALL-65056NPC. Condition: NEW - Aftermarket. Manufacturer: Allied Motor Parts. Year Range: 97-04. Engine Size: 5.7L - 350ci - V8. Description: CNC Ported LS1/LS6 243/799 Style Cyl Heads .650 Springs 2.02/1.59 Valves PAIR. Discover a variety of Cylinder head collection to cater to your vehicle's specific requirements.Couple of things to remember: 1) Milling- every .006 is 1cc of chamber. 2) The .040 gasket will add quench, which is GREAT to protect against detonation, and being that it is thinner than the GM gasket (stock gasket is .058), it performs like a milled head minus the loss of flow milling a head will do.1232 posts · Joined 2010. #2 · Jun 29, 2010. The originals from the 60's and early 70's didn't have the bowtie, but I believe the later ones did. Not sure on that. Those heads were on the L78 396's in Nova's, Camaro's, Chevelles, etc. and the ZL1, L88 and L89 427 in Corvettes. Yes these were fairly rare from the factory.Jun 22, 2023 · The 243 head came on the more powerful LS6 engine from 2001 to 2006, and was used in C5 Corvettes. Later engines like the truck-spec LQ9 and LQ4 used the exact same port design as the LS6's 243 heads, but had 6 cc larger combustion chambers.
243 heads are 243 heads (different hardware for different short blocks though, i.e. LS6, LS2). 806, 853 and 241 all share the same ports. They are cast in different manners so the surface finishes are different which may slightly influence turbulence at certain lifts. The 853 and 241 heads have the same chamber size.These heads came on low-performance 6.0-liter truck engines in two variations: “873” cast iron (1999–2000) and “317” aluminum (2001+). The early design …Factory has the 862 heads. I’ve been offered a 5.3 block with 243 heads on it for $300. Would the stock 243 heads work better on it than the 862 heads? Obviously they need to go to the machine shop to be looked over but without any alterations to the stock form, which is the better head? Engine is stock other than cold air intake.The 862 head is commonly utilized in high-performance cars, racing, and sports cars. It’s also found in some luxury and sports cars. The 862 is a 12-valve design that utilizes two intake valves per cylinder and one exhaust valve per cylinder. The combustion chamber volume is 84cc for the 862S, 83cc for the 862C, 84cc for the 862F, 82cc for ...
Xavi's Barcelona exit is a sad conclusion for a legend damaged by the club he loves. Dermot Corrigan. May 24, 2024. Returning to Barcelona as the head coach was a long-time dream for Xavi, but ...Anybody know the valve drop measurements on 243/799 heads. I have seen .155" for the intake said in a few places, but not the exhaust drop. ... Put the head deck side on a flat surface, with a caliper measure from the top of the valve guide or seal to the valve tip, then measure again with the valve closed. ... Come join the discussion about ...…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. I picked up my car that was advertised as 6.0 heads on it and found o. Possible cause: What did LS 243 heads come on? LS Head Castings The 243 head came on the more powerful LS.
Jun 13, 2023 · It means there’s a drop in compression of about 0.70 when proceeding with the head swap. 706 Vs. 799 Heads. When testing these two types: 799 vs. 706 heads on the 5.3L engine, I discovered that the 799 made the most flow, but it couldn’t translate into power. In this case, the 706 did a better job. 706 Vs. 862 Headsby Raodlife. 862 head is an option for the 4.6L and 5.4L Modular V-8 engines. This head is a great upgrade and a bolt-on option to increase power. The 862 heads flow well and come with upgraded valves, springs, and cams, making this a great upgrade package. The 862-cylinder head is one of the heads that you can pop in with decent gains.The LS 243 Cathedral Port cylinder heads are renowned for their exceptional performance capabilities over the other cathedral port offerings. These heads are designed to maximize airflow and combustion efficiency, taking advantage of the LS6 engine's power potential. With their cathedral port design, larger valves, and improved airflow ...
If the 243 head is off of a Z06 and has yellow valve springs then it will have lightweight valves which drop valve train weight. 243 heads are better in every aspect then the 241 heads but 241 heads are not junk either. They are a good head. ┌∩┐ ( _ )┌∩┐. Man: The Mods you are fighting,C6 Tech/Performance - 243 Cylinder head question - I have someone who wants to sell me some cylinder heads. They have the 243 casting number, but on the inside of the head, it is stamped 5.7. I am not sure if these are heads for an LS6 or for an LS2 motor. I also have a part number of 12564825.by Raodlife. 862 head is an option for the 4.6L and 5.4L Modular V-8 engines. This head is a great upgrade and a bolt-on option to increase power. The 862 heads flow well and come with upgraded valves, springs, and cams, making this a great upgrade package. The 862-cylinder head is one of the heads that you can pop in with decent gains.
We may earn a commission for products pur The LS2 heads wich is the same as the LS6 head has a casting number of 243. Problem is that some of the LS2 have heads with a casting number "799" truck heads, wrong head!!!:weird: I have checked mine and it has the 243 castings.:thumbsup: A vette owner dynoed his vette with some mods and only pulled 345!!! So far 5 07 vettes have … The 241 heads were used on 5.7L LS1 applications The article said they also did a test with the L Receive notifications when cylinder heads are in stock and ready to ship. First ... Leave this field empty if you're human: FED LS1/2/6 Cathedral 243 Stage 2 $ 2,784.96. Beautiful set of 243’s are on the shelf and ready to ship. The heads are assembled ... o Valve Guide Clearance – Your FED Heads come with proper guide clearance for ...Jan 21, 2022 · RPO L99 and LS3 cylinder heads are aluminum with 68cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, 2.165˝ intake valves and 1.590˝ exhaust valves. These heads can be CNC-ported to improve on flow and milled for higher compression. These heads are almost the same, but the L99 heads used a ... The cylinder heads are designed with aluminum materials wi doing math an saying you have 2cc worth of valve notchs i got you around 12-1 comp wise with the 58.5 in for head cc an pistons out .006..with the 60cc 243s i got you at 11.8-1 with 2cc notchs,.006 out and .040 gaskets..hope this helps. I had them actually cc'd after I removed em.. 61.5.. Steve. 408, th400, 1100rwhp.. C5 Tech - Need some input on Patriot stg Update on 601 heads on 350. I finally got tGood deal guys. but two different casting facilitie 243 04 up LS6 aluminum center bolt 5.7 ***These castings were also used around 05 in truck applications*** 862 99 and up 4.8-5.3 Truck heads 706 99 and up 4.8-5.3 Truck heads 799 05 and up 4.8-5.3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads 873 99-00 LQ4 6.0 Iron center bolt heads I did a 408 cube ls using a cathedral port he Aug 6, 2020 · The 243's have bigger valves which do better on 4.0" and larger bores. On the smaller 3.898/3.78" bores of the LS1/6 & all 5.3/4.8's the 706 are very decent. On a 4.00" bore of an LQ4 though it is splitting hairs. On the same cam, on the same engine, the heads are going to perform within +/- 5hp/5tq of each other, it is almost meaningless. 26791 posts · Joined 2006. #7 · Apr 13, 2010. [4135 posts · Joined 2010. #3 · Dec 4, 201799 Vs 243 Heads: Main Feature Comparison ... The 799 cylinder heads c For instance, the 799 cylinder heads come with a smaller combustion chamber than its counterparts. So porting to 799 LS heads would mean milling the cylinder heads to cover up for the bigger size of the former combustion chamber. ... Chevy Cylinder Head LS1/LS6 243/799 - PAIR, Year:97-04. NEW CNC Ported LS1/LS6 Cylinder Heads .650 Springs 2.02 ...