862 vs 243 heads
Last Updated on Aug 16, 2023 By Paul Lucas. There are three main differences between 241 and 243 heads. The first is the size of the combustion chamber, the 241 has a 67 cc, and the 243 has a 65 cc. The second is the port shapes. The 241’s oval-shaped port has a 200 cfm intake, and the port on the 243 is D-shaped and offers better flow.Find Parts and Accessories 243 ls heads KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing! Use your Summit Racing SpeedCard today, and get up to 10% back - Get Details! ... 243/257 dur @.050", .689"/.672" lift, 108.5 deg LSA. Part Number: CXM-03-08-0098. Not Yet Reviewed. Estimated Ship Date: May 23, 2024 if ordered today. Free ...
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ForceFed86 said: ... untouched 862's should support 437chp in an HP range of 6300-7800 @ 292 cubic inches. Seems like a lot. I'm not aware of any small valve 4.8 NA head setups doing anywhere near that on untouched heads. That's only ~1.5hp/ci, which isn't unreasonable for a mild pump gas engine.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 ...242 posts · Joined 2007. #10 · Jul 10, 2009. Sleeper S10 said: The 5.3 L33 comes with LS6 Heads: L33 Vortec 5.3 325 Gen 3 Aluminun Engine Vin "B". 310 HP/ 5300 HO. LS6 Heads, Casting #799 (Originally developed for the ZO6) 9.9:1 Compression. Flat topped teflon coated pistons with floating wrist pins.Nov 5, 2010 · 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..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.The 243 head has 2.0" intake valves and 1.55 exh. The 706 uses 1.89 and 1.55 respectively. The 243 is an excellent head, but losing compression coupled with a larger intake valve in a tiny bore engine isn't a good combo in comparison to the 706. I would pull the 706's and freshen them up and have a good valve job done on them.By Paul Johnson - March 9, 2016. This article applies to Chevrolet Camaro and Pontiac Firebird (1998-2002), as well as all LSx engines. The cylinder head (or "head") has several main functions. Its first order of business is sealing the top of the cylinder (the piston seals the other end). The second order of business is to provide a way for ...It is an aluminum block 5.3 with either 706 or 862 heads, NON DOD. The 05-09 GMT360's got the LH6 and the 07+ will more than likely have 243/799's. In 07+ all the 5.3's started getting the 243/799 heads. The early years will obviously depend on what 5.3 equipped vehicle you have.243 cylinder heads have cathedral-shaped intake ports and a D-shaped exhaust, which helps to enhance air and fuel intake, smooth combustion, and quicker exhausting. This …3012 posts · Joined 2008. #1 · Apr 14, 2012. I have a 2004 Aluminum 5.3 with 70k miles that has 862 heads on it. I also have a set of 243 heads off of a 2009 Aluminum 5.3. Which heads should I use? I've been told the 243's flow better and the 862's supposedly raise compression .5 a point.Performance Rebuilds are good for making a used head better than new, mild gains, and having valve train & compression set up specifically for your application on a budget. $995 + Parts. CNC Ported & other machining for applications where we need to maximize power potential in GM castings. $2295 & up, Including new OE GM LT1 heads with hollow ...WHAT STOCK LS HEAD MAKES THE MOST POWER? WHICH CAM SHOULD I RUN IN MY 6.0L? WHAT IS THE BEST STOCK 6.0L CAM TO USE? STOCK 6.0L UPGRADES! ARE THE 706/862 HEAD...When it comes to fastening two objects together, cap head bolts and cap head screws are two popular options. They both have a similar appearance, but they differ in their applicati...The intake manifold is the most important element in swapping from a cathedral to a rectangular port head. To match the runners, this factory LS3 (PN 12610434) or an L76 manifold are the most popular. It is important to note that there are some minor differences between the L76 and LS3 intakes, such as a screw-in MAP sensor instead of the Gen ...Do you know what a Phillips head screwdriver looks like? Find out what a Phillips head screwdriver looks like in this article from HowStuffWorks. Advertisement The Phillips head sc...5.3 vs Vortec 350 in a Jeep; Changed direction on project. A1000 fuel regulator questions; Fuel boiling.... Breaking up at 5k and above RPM; ... 862 vs. 243 Heads; Holley Tunnel Ram; Easiest way to rig starter? perf rpm; 5.3 teardown/build; started my swap; Help with Rad Fans; FYI for Performer RPM users!!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.12,557. The heads also bump the compression from 10:1 to 10.5:1 (stock for stock),,,,since they are milled (depending on how much) the compression should be even a tad higher than that. I'm sure the better exhaust side on those LS6 heads helped as well. Pretty interesting results for sure. 10-29-2010, 01:58 PM #5.
Upgrading LM7 Cylinder Heads. The stock heads can be CNC ported for more airflow and milled up to .030 in. for more compression. Flow numbers can be as high as 325 cfm at .600 lift. Lightweight hollow stem LS3 valves can be cut to 2.000 in. to fit the seats. Between the light valves and better springs, the engines will pull cleanly to 7000 …Location: My own internal universe. Posts: 10,446. Likes: 134. Received 1,837 Likes on 1,145 Posts. They won't flow as good as 243 but you'll have better compression vs 243. You can have them ported for a reasonable price and have a good valve job done on them to make them perform. They'll never be rock stars but they'll do fine with that cam.But no matter, your LQ9 is the gold standard of solid GEN 3 builds. You are going to have to get those LS6 heads ported, a good shop is West Coast Cylinder Head. Richard is the guys name. ANd they even have a swap out for your exact 317 head 250cfm to just over 300cfm. For $1500 exchange, $1800 outright. Pricing.The best factory cathedral port heads (243, 799, and 317 castings) flowed near 250 cfm, which represented a huge step up from the conventional small-block heads that preceded them. However, the ...7477 posts · Joined 2005. #29 · Nov 2, 2013. Stock 243 heads are good for about 20 hp on a 2004 LS1 and can often be found for about $400 or so. 2004 torrid red with red interior A4 GTO (1 of 499) TR-230/236 cam/TEA ported Trick Flow 215 heads/4" CAI/100mm MAF/ported FAST 90/Kooks/Magnaflow.
After running the same setup with the LS3 heads, the 6.2L produced 826 hp at 6,700 rpm and 771 lb-ft of torque at 4,600 rpm. The gains offered by the high-flow LS3 heads continued under boost, but ...Location. Pensacola, FL. Posts. 1,263. The 243's bring about $400-450 with springs. I feel like the cathedral heads produce more low end torque compared to the LS3 heads. I dont really miss it while autocrossing, but I notice it more in daily street driving situations. The LS3 heads pull pretty hard up top.American Airlines is reinforcing its position at the top of the pack in Hilton Head, South Carolina, with new flights to Chicago, Dallas/Fort Worth and Philadelphia next spring. Am...…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Running just 7 psi, the turbo system improved the power out. Possible cause: Fits 1997-2013 Cathedral Port LS Heads. Fits Casting Numbers 243 799 706 862 317 241 853 8.
GM 243 (LS6) and 799 (LS2), 218 cc. The 218-cc LS6/LS2 head is a mild upgrade from the basic performance rebuild, which boosts flow by 32.2 cfm on the intake side and 28.5 …Are you looking for a rental property near you? Finding the right place can be a daunting task, but with the right resources and information, you can get a head start on your searc...Although the SPM approach is more reliable, porting 862 heads eliminates their distinction. However, porting is expensive; therefore, casting 706 heads in stock form is the best option. 706 Heads vs 317 Heads. Due to their better ports, 317 heads are frequently preferred over 243 and 799 heads, two more expensive models
The 243 heads have larger intake and exhaust ports than the stock heads, allowing for an improved airflow that increases torque and horsepower. With this increased airflow comes a greater capacity to burn fuel efficiently, giving you better performance overall. Additionally, these upgraded 243 heads are designed with a higher-lift camshaft so ...Our 706 & 862 ported heads include: Our in house CNC port. PCD surfaced to your desired chamber size. Proprietary competition valve job. Hand blended valve job. ***This is our most common setup, but if this doesn’t meet your needs please call us so we can get you set up to your needs***. Intake valve: 2.02 Exhaust: 1.57.
The L33 is an example and the its pistons are 4 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 ... France is over twice the size of England (37 percent larger), conta243 vs 823 combustion chamber. by quicksilver can you make more than 500 hp na with stock 706 heads? do 799 heads make more hp than 706 heads? what makes more hp, rec port or cath port heads? Jun 2, 2023 · Here’s a quick data sheet on the specs My plan is to rebuild the spare block from the inside out with all new bearings, BTR "Torque" cam, Weiand aluminum intake, and then port/polish the heads. CMIIW: I've been told there is no major difference between the 706 and 862 heads once you work them over. So I'd be okay having the 862's ported/polished/rebuilt rather than my current 706's. 3012 posts · Joined 2008. #1 · Apr 14, 2118. Intake valve is 2" on the 241, exhaustBoth of the cylinder heads possess the same valve s 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 ...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. can you make more than 500 hp na with stock 706 heads? do 799 h Dec 24, 2017 · 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. The idea was to flow and measure each ... ddawson. 15570 posts · Joined 2004. #4 · Sep 29, 2008. The 3[Exhaust flow at .600" - 180 (241) / 183 (243) The Speed Works has teamed up with Wilkes Performance to bring yo We have a few options you can purchase such as a pair of Stage 1, Stage 2, Stage 3, or Stage 4 LS 706/862 Cathedral casting 5 axis CNC Porting with stainless valves and WP .660 dual race springs with WP titanium retainers. These heads have been disassembled, inspected, cleaned, 5 angle valve job, and milled slightly to clean up the heads.