862 vs 243 heads
The 799 head is designed and made to be compatible with high-performing LS engines, such as 4.8L, 5.3L, 5.7L, or 6.0L, etc. These vehicles require maximum airflow, making the 799 head an ideal choice. On the other hand, the 862 head is compatible with LR4, LM4, and LM7 and such engines where low torque is more essential than better horsepower.It happens to even the best DIYer: the simple process of removing a screw becomes a struggle when the screw refuses to budge and the head of the screw becomes stripped. But not all...
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Intro to the LMG Engines. The LMG came in GM trucks and SUVs in 2007-'14 and made between 310-326 horsepower horsepower right out of the box. It's a Gen. 4 5.3L iron-block engine, so you're getting the better intake manifold, connecting rods, and ECM. The engine also had 799 or 243 casting heads which are closely related to the LS6.Which factory LS cylinder head works best with a turbo, 706 or 317? It's the age-old comparison, airflow vs compression. This LS head shoot out between the s...You could bore to the LS1 pistons run them and get a set of ported 243's. Add a Fast 90mm intake, cam, and you have an 400hp iron block LS6. Thats easily a 100K mile motor. For a stock 5.3L port the heads, cam, and a LS6/Fast intake and it might make 400hp on a engine dyno. But would make 300-325hp at the wheels.
Is 862 Heads Any Good? If you are asking, “Are 862 heads any good?” The 862 heads are pretty good because they can deliver better compression after a porting job. However, …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 headsTo introduce the LC9 engine, it is a V-8 and features 799 or 243 casting heads which are closely related to the LS6. ... However, there is one key difference between them: their compression ratio and make. The 862 heads have a higher compression ratio than the 706s, owing to their sand cast construction.862 is a 5.3 liter head. Smaller combustion chamber (61.5CC), increased CR. 241 is a 5.7 liter head. Larger combustion chamber. Gains from a higher ration rocker arm (1.8 vs 1.7) are going to be minimal. Expect approximately 10 peak HP. IMO, if you have any plans of adding a aftermarket camshaft later down the road, pass on the 1.8 ratio rockers.The 799 and 862 heads have their own pros and cons. While the 799 heads offer better flow and performance, the 862 heads offer better combustion chamber design and improved efficiency. Ultimately, the choice depends on the specific needs and goals of the engine. Pros of Using 862 Heads. Cons of Using 862 Heads.
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.GM's #243 or #799 LS6/LS2 head casting is the most sought after GM cathedral port casting. At a mere 15 cc over stock volume this particular port sees gains of over 40 cfm on the intake utilizing a factory GM 2.00" valve. This package has found great success amongst enthusiasts seeking area under the curve, phenomenal throttle response, and no ... ….
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No 243s or 799 have the casting defect that I've heard, it was pretty isolated to the castech only 706's on gen III 4.8/5.3's. There are 2 other sets of 706's that are not affected. The early sand cast heads come as 862s and 706's, and a die cast 706 that isn't made by castech. 16 posts.It still used 799/243 heads but also utilized variable valve timing and had flex-fuel capability. Chevy also used a 5.3L engine that was only in vans produced from 2010 to 2014, known as the LMF engine, identified by a number 4 in the 8th digit of the VIN. ... some include 1218 springs and the Elgin 228/230 cam. If your truck has 862/706 heads ...
forthman. 654 posts · Joined 2003. #2 · Mar 16, 2006. The old 69-70 351w heads have bigger valves and intake runner. Otherwise the 302 and 351w heads are the same. E7TE castings are albout as good as they get. The 289 heads do offer smaller combustion chambers but also smaller intake runners. I ran 302 E7TE's ported and milled so they had ...The 862 and 706 casting Cathedral-port cylinder heads can be CNC-ported to flow close to the aftermarket heads. With a bigger cam you can mill the heads for a little over 10:1 compression which runs on pump gas. ... had two head bolt lengths vs. three on the earlier engines. ... the 243's (or 799's with their similar chamber and flow) would ...If you want something that's more rugged - you need aftermarket. The aftermarket heads used for 6.2 and 6.5s weigh almost 5 lbs. more each then stock 6.2 or 6.5 heads. Keep in mind that 6.5 heads have the injectors at different angles than 6.2. Not a big deal but requires bending the lines a bit.
should we scoff at love at first sight See All 18 Photos. After installation of the TrackMax cam, the power output of the 6.0L LY6 jumped from 443 hp and 467 lb-ft of torque to 514 hp at 5,900 rpm and 493 lb-ft of torque at 4,600 rpm ... angel nails pine bush nyhawkhatesyou tiktok The LS3 was run with a Holley HP management system and FAST injectors. With stock heads, the modified LS3 combination produced 552 hp at 6,400 rpm and 513 ft-lbs of torque at 5,000 rpm. After installation of the TFS Gen X 255 heads, the power numbers jumped to 571 hp at 6,500 rpm and 525 ft-lbs of torque at 5,200 rpm.#1 · Dec 3, 2013. i want to know if I would pick up anything swapping in STOCK 243s heads in place of stock 862 truck heads that i am currently running. i recently put a bigger cam in the car and picked up zilch.zero.nada and im wondering if im at the limit of the 862s. puffy deep fried bread crossword clue clue GMC / CHEVY SUBURBAN 5.3 LITER V8 REBUILT CYLINDER HEAD. $225.00. Casting #. THIS IS FOR CASTING NUMBER 862 AND 706. WE ARE NEEDING THE CASTING NUMBER OFF YOUR CYLINDER HEAD. PLEASE FILL OUT THE FORM AT CHECKOUT OR GIVE US A CALL AT 800-942-4503 IF YOU HAVE ANY QUESTIONS. This listing is for a rebuilt GM 5.3 liter V-8 cylinder head.823 vs 243 Heads. As mentioned about the LS 823 heads specs, its bigger intake port owns a 70cc, whereas the common 243 L6 cylinder heads have basically a smaller volume at 64cc. This means that 823s offer and promote better overall performance in the vehicle's combustion chamber. spartanburg herald journal obitsmychart optum prohealthah4r payment portal European heads of state are meeting today in Brussels for their latest bout of dialogue on the EU crisis. European Council president Herman van Rompuy writes, “The main purpose of ...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 rezilta bolet new york oil catch can, Pacesetters LT Headers,3500 Stall, K&N CA, bmr drag bags. We can port and valvejob your 243's, install the larger 2.02"/1.57" stainless valves, and the PRC .650" lift dual springs all for $1200. That makes them the equivalent of our PRC Stage 2.5 heads, just with your used castings. Additional milling is free of course. vance outdoors coupon codehow to spawn dinos in ark on xbox onejohnny scoville wiki I did a 408 cube ls using a cathedral port head. It was the 243 casting, but I don't think there is a big difference in potential. It made good power for a pump gas street engine. Had 10.7/1 comp, 243/258/110 comp cam with .625" ish lift. sv intake, 243 heads ported reasonably well with 2.02" 1.56" valves 50* seats, whitener 4150 carb.