What did 243 heads come on
Pontiac 1973-1974 Cylinder Heads. No "H" stamp on early 1973 heads. May 7, 1973 is the head assembly date, NOT the casting date. Heads with casting dates starting around mid-March 1973 to mid-April 1973usually will have screw-in studs. Combustion chamber depth measured from quench side. Stud Boss Type refers to casting design around rocker arm ...I guess I'll start: "243 Heads" come standard on LS6 and LS2 Engines. They are a straight swap onto an LS1 Engine. They will give you more power, because they flow better than the "241 Heads" that are on the LS1 Engine. You can tell if its an "241" or "243" head by the stamping on the top front side of the head. -Nick.We didn’t want to spend big money on a fancy set of CNC-ported heads, as we’d already used up most of our budget on that beautiful K1 Technologies rotating assembly. According to the internet, some of the best cathedral port LS heads available have a 243 casting code, and would have originally come on 2001 or newer LS2 and …
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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.C5 Tech - 243 Heads question - hey guys i have a question. there is a sale on ebay for 243 heads & the post says they are interchangable. i was under the impression that these heads here not. could someone please clear this up for me. here is the link to the post....In Stock Form, the Cathedral Port 243/799 are the best flowing GM Production heads for Sub 4.00" Bores in a N/A Setup, at least in my opinion. Above 4.00" Bores, 6.0L+, it can vary depending on your setup. I just saw a dyno video in which in stock form the 706 head beat stock 799 heads by 2 hp.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".Before I get into the the meat of the book—the spec charts—there are a few things you need to know. They include information on converting from a cathedral port to a rectangular port, some thoughts on the merits of cathedral versus rectangular ports, and a bit of cylinder head theory. The intake manifold is the most important element in swapping from a cathedral to a rectangular port head ...The 243 heads, being performance-oriented and made of aluminum, tend to come with a higher price tag. Consider your budget and intended use when making a choice. Modifications and Customization. If you're a gearhead who loves to customize and modify your engine, the 243 heads offer more room for improvement.The 5.3/4.8 706 head was the go to choice before 243/799 castings became more available. Any chance to check with prior owner of the engine and find out the history of the heads? You might get lucky and have a good set of ported 706 heads. A correctly built and ported 706 will give any ported 241 a run for the money.Mainly it is because the 243 head is vastly superior to the 853 head in the design and even more when ported. If I were to spend the money I would get their ported 243s. ... From AI's own website the 218cc 243 program gives gains of 20-30 over stock 243s so that would come out to be 30-45 over a stock 853. While the 219cc 853 program averaged ...7477 posts · Joined 2005. #5 · Jul 14, 2010. The .040" Cometic gaskets will raise compression ratio, not lower it. That said, the GM MLS gaskets seal up the best and are a decent price. I got mine from Texas Speed. Get the LS1 gaskets that are 3.910" bore diameters. That's what I used and I have no problems.what i have learned is that running plain 243 unmilled heads 7.4 pushrod is fine. the 243 head with light weight valves requires you to run a shorter pushrod,or if the deck surface is milled. possibly a 7.35 length rod,but im not sure. would have to be measured for proper length. Like.The main difference between 799 and 243 heads is the amount of valve lift that they can provide. 799 heads have a higher valve lift capability than 243 heads, meaning they can provide more airflow into the engine. This often results in increased power output from the engine. 243 heads also tend to be lighter than 799 heads, which can be ...C5 Tech - Need some help with 243 heads.. Ques. - Are the 243 heads off a 2010 silverado the same as the 02-03-04 ZO6 243 heads..They say they will fit the LS engines.1400 HP POTENTIAL Assembled heads come with roller springs good up to .980 lift. Customer must supply cam specs. Machined exclusively for special T&D rockers. Valve Angle is 10 degrees on the intake and 6 degrees on the exhaust. 540 CFM potential airflow. Intake port volumes available are 400cc as cast up to 460cc fully CNC ported. Exhaust port volume is 168cc. Intake valve diameter is 2.450 ...Head and face reconstruction is surgery to repair or reshape deformities of the head and face (craniofacial). Head and face reconstruction is surgery to repair or reshape deformiti...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...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,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 headsRick@Livernois said: As others have stated, the 243 head would be a step backwards as the L76 uses the same head as a L92/LS3. Our "B" cams are typically used for forced induction. Larger displacement engines will "eat up" the camshaft and actually make it sound much more tame than a stock displacement engine with the same cam.The United States became an independent country on July 4, 1776. This means the country turned 243 years old in 2019. The United States of America formed after the colonies decided...Feb 18, 2024 · 706 heads tend to be more popular than 243 heads with those who run naturally aspirated engines. While they don’t have the same size combustion chamber they also don’t have the tendency to lower the compression ratio and reduce horsepower. When looking to replace your heads, they offer a high degree of consistency since they are ...The 243/799 cylinder heads come with a 2.00" intake valve, 210cc intake runner, a 1.55" exhaust valve, 75cc exhaust runner, and it has a 64.5cc combustion chamber. The 243/799 3cc bigger combustion chamber might not seem like much but let's look at the factory Compression Ratio as seen here.The 243/799 cylinder heads come with a 2.00" intake valve, 210cc intake runner, a 1.55" exhaust valve, 75cc exhaust runner, and it has a 64.5cc combustion chamber. The 243/799 3cc bigger combustion chamber might not seem like much but let's look at the factory Compression Ratio as seen here. And then compare it with the 243/799 cylinder head ...Patriot Performance 2033: My run a total 24 degrees of timing with 93 octane. These heads provide up to a 65 cfm improvement over stock OEM versions. The 59cc chambers (achieved by milling), will increase the compression on a stock LS1 from 10-1 to 11-1. Based on other modifications, gains of up to 40 rwhp can be expected.Engine Technical. Engine Tech And Modification. LQ9 build cam suggestions. I just got my 4x4 T56 swap completed and now I'm planning a nice NA build. Through research I've found that the 243 heads and TBSS intake are a nice combo with CR around 11:1, and basically my whole setup hinges on the cam selection.
Sierra Pro-hunter. Based on the parent .308 Winchester case, the .243 first appeared in 1955 in Winchester's model 70 bolt-action. It was envisioned as a "dual-purpose" cartridge, highly useful for both varmints and medium game. Remington more or less concurrently brought out the .244 Remington in their model 722 bolt-action gun.A high-ranking delegation, headed by a military commander and including technical experts, will go to the crash site in Eastern Azerbaijan, Tasnim said. The helicopter crashed in a remote ...Feb 25, 2011 · 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.Oct 5, 2010 · CoolAid. 10103 posts · Joined 2007. #7 · Oct 5, 2010 (Edited) Well built I've seen a lot of 450whp cars on cam only. The 243s can be done up great, just under or even with the flow of built ls3 heads. Its not out of the realm of possibilities to hit 500-525rwhp on a fully built stock internal LS2 with worked 243s through an M6.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 …
The LS4 is a 4th gen, 5.3 l aluminum small block engine that was used in GM cars between 2005 and 2009. They had cathedral port cylinder heads and used Active Fuel Management (AFM). The LS4 cylinder heads came with two casting series numbers - 799 and 243. The combustion chamber volume is 65cc.This listing is for a rebuilt GM 5.3 5.7 or 6.0 liter V-8 cylinder head casting 243 only you must have an exchange with the exact same casting number. These heads come on GMC and Chevrolet trucks and SUV's. For other models see our store listings. This head is completely rebuilt. It has been pressure checked for cracks and resurfaced.…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. 243's are extremely capable of good gains when CNC&. Possible cause: The 243 Heads are cast iron cylinder heads that have been CNC-machined.
The cylinder heads are designed with aluminum materials with a 61cc combustion chamber volume. They also come with a cathedral-shaped intake port and an oval exhaust port. The 826 cylinder heads on LM7 have an intake runner volume of 200cc, exhaust runner volume of 70cc, 1.890 in. intake valve diameter, and 1.550 in. exhaust valve diameter.The result of a point of compression adds 1.5 to 2.0 percent, or about 10 hp, automatically to the AFR 245 heads. To make this a fair fight, we gave the two factory heads the same percentage and ...Apr 28, 2013 · 2004 GTO M6, 243 heads, 224/228 TSP cam, Svede intake, JBA Shorty's Catless Mids 383HP/376TQ Whiteline RR bushings, Rear Sub frame, Diff inset and trans insert. Save Share. Like. ... Come discuss mods, horsepower, engine specs and more! Show Less . Full Forum Listing. Explore Our Forums.
The two types of heads, 241s and 243s are found in many vehicles. The combustion chambers for each of these types differ slightly: 243 heads have an internal volume of 65cc while 241s have a 67cc size. Due to this difference in size, the compression ratio for 243 heads is higher than that of 241s, meaning that more power can be …The 243 heads came on the LS6 engine produced from 2001 to 2006. It was typically found in the C5 Corvette, but it was eventually ported to the LQ4 and LQ9 to meet truck specs. The latter offered 6cc larger combustion chambers to accommodate the working style vs. speed and acceleration.
The cylinder heads are designed with aluminum materials with a 6 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. After installation of the 706 heads, the power jumped This listing is for a rebuilt GM 5.3 5.7 or 6.0 liter 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 intake ports on 862 heads flow slightly less th Trick flow 228/230, K&N CAI, Beehive Springs,Hardened 7.4 length Push rods,Spintech Catback Exhaust. The rest of the car has stock manifolds,stock intake,stock cats,stock 241 heads. I pass smog and put 365 to the wheels and 352 pounds of torque. I have a simple set up and I will be installing AI 243 heads and shorty Headers with in this month. Couple of things to remember: 1) Milling- The L33 is a 5.3L, Gen. 3 small block engine used in GM trucks betwee799 LS Engine Cylinder Heads are some of the most recent cylind 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".The valves on LS3 heads are designed to be larger than those on stock LS heads to improve airflow, leading to increased power output. Standard valve sizes for LS3 heads include 2.165 inches (intake) and 1.590 inches (exhaust). However, it's not uncommon for LS3 heads to feature even larger valves. For example, some aftermarket LS3 heads may ... We would like to show you a description here but the site won&#x 441-A late-model smog head installed on 350-cid engines, the 441 casting has 76cc combustion chambers and 1.94/1.50-inch valves. Although the intake ports are only 155cc's, these heads deliver ... These heads came on low-performance 6.0-liter truck engines in two var[7477 posts · Joined 2005. #29 · Nov 2, 2013. S2002 Camaro Z/28 Pewter. Originally Posted by 98TransAmWs-6. Here are 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 ...Apr 11, 2010 · 45 posts · Joined 2006. #4 · Apr 12, 2010. I'll recommend TFS 215 heads and a 224/228 comp cam. A friend of mine has this package and I was really impressed. With a ported fast he made 450 rwhp and the car idled and drove great. It was actually a little tame for my taste, but sounds like what you're looking for.