862 vs 243 heads.

Our fellow tech writer and dyno-flogger Richard Holdener reports a gain of roughly 15 hp with stock 5.3-liter heads on a 6.0-liter. Our 5.7-liter head test bumped the average power by 9 hp but ...

862 vs 243 heads. Things To Know About 862 vs 243 heads.

which stock ls head makes the most power? should i upgrade my stock 6.0l heads? do cathedral-port heads make more torque than a rec-port heads? what about th...Office. Aug 3, 2019. #13. There's the #315 head for 64 and 65. There is also a # 080 head for those years. In 66 there was a #178 (early) #234 (late) and also the late #920 head which was used late in 66 and into 67. In 68 when 273's went open chamber and hydraulic cam, they shared the #675 head with the new LA 318.53 posts · Joined 2010. #4 · Nov 12, 2017. Unless you're spending money on AI ported 243's, go with the LS3's. LS3's flow more and will keep the port velocity up compared to the typical hogged to hell port jobs I've seen on factory cast heads. There are very few shops that port heads well, with AI being the best around.Vehicle enthusiasts argue about 243 heads Vs. 799, as well as 243 heads Vs. 862 heads . However, if you desire improved horsepower with excellent power output, the 243-cylinder head is a perfect choice.1518 posts · Joined 2009. #7 · May 3, 2010. I just got my quote from AI for their full 226cc CNC work and the price can not be beat. With shipping back from them the price is just a bit over $1,000. They also have a budget pricing port job as well but yields about 10rwhp lower.

243 heads are known for their larger port and valve sizes, which are typically about 210cc and 2.00 inches respectively. This makes them perfect for high-flow, high-RPM applications, providing more power at higher speeds. On the other hand, the 799 heads have smaller port and valve sizes, around 200cc and 1.89 inches respectively.Are the 799/243 that much better ported , then the 862 ported with bigger intake valves? Heads are for a turbo car running M1. Thanks Mike. in this thread in this sub-forum in the entire site. Advanced Search Cancel ... 862 5.3 heads. Jump to Latest Follow 1 - 3 of 3 Posts ...

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.

1. 243 Livernois Stage 2 heads 2. Kook's LTs 3. Mild cam (TR 224/224 112) The gain from those 3 mods was 102 rwhp over factory. I debated the 5.3 heads vs. the 243s, was never able to come to a definite conclusion, so for the slight bump in compression I used the .040 Cometic gaskets.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.862 s Vs 243 s..... So what the difference between some milled 862s and some stock 243s? Also how big of a difference would the 243s and a nnbs intake do on a 2003 4.8?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

Push notifications crossword

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 ...

862 Vs 243 Heads . One of the first things that you need to consider when building a performance engine is what heads to use. There are many different options on the market, but two of the most popular choices are 862 castings and 243 castings. So, which one is better? The 862 heads were originally designed for high performance applications.So what the difference between some milled 862s and some stock 243s? Also how big of a difference would the 243s and a nnbs intake do on a 2003 4.8? 862 s Vs 243 s.....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 …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.We are talking head casting numbers here. Some of the other folks can chime in and correct me if I'm wrong, but there are a few different casting numbers for the LS motors, particularly the LS1. LS1 806 Heads - 97-98 853 Heads - 99-00 241 Heads - 01-04 LS6 243 Heads - 01-04 (only 02-04 zo6 came with sodium filled intake valves) LS2243 is the Z06 casting, 241 is the last and best LS1 casting. The 243 has D-shaped exhaust ports and some other minor differences. Reply Like. 05-16-2007, 01:48 PM. # 3. 94legaleagle. Melting Slicks. Thread Starter. Member Since: Mar 2005.

LSX3rdGen. The 241 head is a stock ls1 head it was on the f bodys and also on the ls1 vettes. They were produced between 2000 and 2003. they are the same as the 853, the 853 was made from 1997 to 2000. ls6 heads are 243's.Advertisement Some say the power of aphrodisiacs is all in our heads. In other words, it's a placebo effect -- if we think something is going to put us in the mood for love, we'll ...ForceFed86. 2515 posts · Joined 2012. #4 · Jul 30, 2014. Sure they are. They just flow less. At .050 on the same flow bench a 243 flowed 251/176 VS a 862 at 218/163. One article I read showed a direct head swap with no other changes was worth 24ftlb. The CC in the 862 is 61cc VS the 243's 64cc I believe. So you need to factor that in as well.Both of the cylinder heads possess the same valve size. Additionally, they have ports and chamber cores of the same size. The actual difference lies within the compression ratio of the two. 862 heads are cast on sand molds, but 706 cylinder heads are cast on a semi-permanent mold. 862 heads also fit into smaller combustion chambers as compared ...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 ...Running just 7 psi, the turbo system improved the power output by 243 hp. But the real question is, would the 706 heads still make more power under boost? After …

Go with the 862s for 3 reasons: Smaller combustion chamber will have a slightly higher compression ratio. If it's your first time porting you may as well fuck up the heads that have a lower resale value. differences in horsepower just aren't going to be a whole lot between the two once ported.

The 799 and 243 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 up to 10.8 compression which runs on pump gas. ... There is no reason to put the weaker 862 head on an L33 when the engine comes with the best flowing cathedral port heads GM …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.Mar 2, 2021 · The combustion chamber diameters can play a big role in hindering flow and performance. The 706/862 combustion chamber diameter measures out at around 3.670" and the 243/799 combustion chamber messages out at around 3.880” and giving the fact that the LM7 5.3L engine bore is 3.780" this more than likely has something to do with the power loss ...2004 #243 GTO heads vs 2002-2004 #234 LS6 Corvette heads. New guy here, but I've been driving GTOs since I bought my first, a 1970 400 w/THM, back in high school in 1975. I presently own a 2001 Corvette with an all stock LS1 and I've been wanting to bump up the horsepower from 350 to 420-450 (more would not disappoint me).Just picked up a set of 862 5.3l heads for $100 and was wondering how well they will work for me. I have a forged 346 and the pistons have a small dish. I haven't done the math but the CR is around 9.2-9.4:1. I want to bring the CR back up to around 10:1. My plans are to hog the heads out and throw in some big valves and have them milled to get ...Often tines, large valves will actually decrease air flow. Let's take a look at the Chevy 305 heads as a good example: The normal valve size in the "performance" 305 head is 1.84″ x 1.50″. Thinking that "bigger is better" many people install 1.90″ or 1.94″ intake valves in 305 heads. Well, the fact is, larger intake valves in ...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.

Nora sabella obituary youngstown ohio

hivoltagedriver. Port and polish on a set of 243's is usually ~20hp. A set of ported 243's on your LS1 should make a sizable difference, especially with a cam. '09 PSM G8 GT w/ Premium & Sport packages. Go: Kooks 1 7/8" LTs, catless mids, Corsa, VCM OTRCAI, Rick C. AirRam intake and ported TB, tuned by me.

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 …Why are Chevy 706 Heads better than 317 or 862 Heads? 706 Heads Vs. 317 Heads; Most people tend to prefer 317 heads as they have improved ports, same as 243 and 799 Heads, which are more expensive. However, 317 heads have larger combustion chambers of 71.06cc, which will cost performance, especially on a naturally …Aug 3, 2022 · 823 vs 243 heads The popular L6 243 heads have a smaller capacity (64cc), whereas the 823’s larger intake valve has a 70cc cylinder, promoting better overall flow within the combustion chamber. In addition, there’s some controversy among gearheads about whether the “swirl” ramp added to the 243 to improve fuel and air mix in the ...Mar 11, 2023 · Intake and Exhaust Ports. The intake and exhaust ports on the 243 heads are larger than those on the 799 heads, which allows for more air and fuel to enter the engine. This can result in higher horsepower and torque output. However, the smaller ports on the 799 heads can provide better velocity and airflow at lower RPMs, which can be beneficial ...232cc 243's vs 260cc 821/823's. Jump to Latest Follow ... I think the V3 is designed more for the 243 heads. If you are going 821/823 heads I would ask PCM which cam they recommend for that. 08 BLACK 2WD 3SS - Got a whine under the hood and sounds like its got a miss also..1 Jun 2020 ... WHO WINS? FULL AIRFLOW & DYNO RESULTS-ULTIMATE LS HEAD TEST. 11 SETS OF LS CATHEDRAL HEADS. How much hp can stock LS1 heads make?The L33 is an example and the its pistons are 4.8l piston, same part number BTW. All the later 5.3l's have flat tops and 243 heads. So the blocks are the same. The rods and crank are the only differneace. Use the crank and rods from the 5.3L and use 243 heads and have the 5.3L H.O. or L33 (well an iron block version at least).The 799 and 243 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 up to 10.8 compression which runs on pump gas. ... There is no reason to put the weaker 862 head on an L33 when the engine comes with the best flowing cathedral port heads GM …24227 posts · Joined 2006. #4 · Nov 4, 2009. I saw a post somewhere that showed that the stock 243's flow very well. I'd have them cleaned up by a pro. Save the aftermarket heads for use with a big cam and high rpm use. You will see gains with the aftermarket, but the $$$$ might not be worth the hp gain.Ai GM 243 LS2/LS6 Performance Rebuild Cylinder Head Package. Our Performance Rebuild suite of inspection and machine work is a great option for the value minded. Even in as cast form the GM LS cathedral castings are capable of producing impressive power levels. If you are building a budget setup, we can bring the factory head back into better ...

Pros And Cons Of Doing A 243/799 Cylinder Head Swap On The LM7, DESCRIPTION: GM GMC Chevy V8 This listing is for the Brand GM GMC 706 castings Reinforced casting makes this. Home; Home › 799 heads on compression › ... 862 Heads Max Milling Forums. DESCRIPTION: GM GMC Chevy V8 This listing is for the Brand GM GMC 706 castings Reinforced ...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.When I first started playing with engines (don't go there, I'm old), and the heads had worn valve guides, it was common practice to either: a)Get them knurled. or. b)Get the stock guides replaced with bronze guides. Bronze guides were considered "THEE best", aka "the shit". Now I'm reading "If you have bronze valve guides you NEED roller rockers".Instagram:https://instagram. aquaman 2 showtimes near cmx tyrone 10 So, I am not sure if that would work and if I should get another 706 or 862 head to make the heads match but I'm trying to do budget build. Thanks SPONSORED LINKS. Tuesday, November 21st, 2023 AT 4:39 AM. 3 Replies. MONSTERTRUCKDADDY MECHANIC; 30 POSTS; Hello HD1200, If the combustion chambers CC are the same, and the spring installed heights ...If you are just installing stock heads with no work, forget the 5.3 heads and just get a set of decent 243 heads which will still bump CR up 1/2 point on the LS1 (64cc combustion chambers compared to 66 CR of the 241 heads). 2004 torrid red with red interior A4 GTO (1 of 499) 10 day weather forecast for eau claire wi LSX3rdGen. The 241 head is a stock ls1 head it was on the f bodys and also on the ls1 vettes. They were produced between 2000 and 2003. they are the same as the 853, the 853 was made from 1997 to 2000. ls6 heads are 243's.862 heads: These are also compatible with 5.3 engines, similar to 706 heads. However, they offer slightly less power potential. 243 heads: A popular choice for LS enthusiasts, they provide higher power gains when matched with the right cam. Cam swapping with 5.3 engines typically benefits from using LS3-type springs. These springs improve valve ... broward county schools estore St. Jude Donor '03. 853 and 241 are basically identical. 853 was used on 99-00 LS1 engines. 241 was used on 01-04 LS1 engines. They both have a 66.67 cc combustion chamber (10.1 CR), 200cc intake runners, and 70cc (round) exhaust ports. The 243 head is the 01+ LS6/LS2 head.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 … walgreens 83rd ave and glendale 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. word trip level 283 Nov 18, 2022 · Both of the cylinder heads possess the same valve size. Additionally, they have ports and chamber cores of the same size. The actual difference lies within the compression ratio of the two. 862 heads are cast on sand molds, but 706 cylinder heads are cast on a semi-permanent mold. 862 heads also fit into smaller combustion chambers as compared ... model craftsman 46 mower deck belt diagram Exhaust flow at .600" - 180 (241) / 183 (243) The 243 heads have a D-shape exhaust port that improves flow and came with higher lift valves springs. Both heads came with 2.00" intake valves and 1.55" exhaust valves. To my understanding, this is all the difference. Last edited by R6cowboy; 02-26-2011 at 01:52 PM. hcso tampa fl us The depth of the Columbia River ranges from 20 feet to 170 feet at various points along its route, and its total length is 1,243 miles. Locks, dams and reservoirs built on the Colu...Get rid of that leak to save both water and money. A dripping shower head isn’t just annoying: It’s also a waste of water with environmental and financial consequences. There are a...link to camhttps://www.summitracing.com/parts/btc-trucknorrisLink to valve springs https://www.summitracing.com/parts/SUM-174002cam retainerhttps://www.summ... big boi detroit Despite numerous differences the Gen III LS Engine and Gen IV LS Engine cylinder blocks share a lot of the same traits. 4.400 Bore Spacing (same as the original SBC) Deep Skirt Block with Six Bolt Cross Bolted Main Bearing Caps (reminiscent of the old Ford side oilers, FE, and some early hemi blocks) Center Main Thrust Bearing. 9.240 Deck Height.862 Heads Vs 706 Heads: A Brief Overview. Both 862 and 706 heads are popular choices for cylinder heads in engines. 862 Heads Vs 706 Head Comparison . Feature 862 Heads ... 243: Found on high-performance LS2, LS6, and LQ9 engines; 317: Found on 2001+ 6.0L truck engines (aluminum) section 215 state farm arena In a comparison of the cammed 243 head and the cammed rectangle-port LS3 head, the LS3 torque peaks at 456 lb-ft (4,800 rpm) while the 243 head madeat leastthat much torque from 3,500 rpm all the ... walmart coal mine Travolta's 707 is now headed back to Australia, where it will be maintained and put on display with the Historical Aircraft Restoration Society. John Travolta by any measure is an ...The combustion chamber diameters can play a big role in hindering flow and performance. The 706/862 combustion chamber diameter measures out at around 3.670" and the 243/799 combustion chamber messages out at around 3.880” and giving the fact that the LM7 5.3L engine bore is 3.780" this more than likely has something to do with the power loss ... 5201 r street lincoln ne Chevrolet LS rectangle port heads need at least 4.00 bore. 5.3 and 4.8 are 3.78". LS7 heads require even larger. All 4.8s, 5.3s, and 5.7s came with cathedral port heads. Like mentioned, the square port heads were not put on any engine with a bore smaller than 4".According to the trusty flow bench, the chamber work did indeed improve the flow rate of our 706 heads, with the largest gains coming at 0.200 lift for the intake and 0.400 lift for the exhaust ...