What did 243 heads come on
Add a fast intake and another 10-15. N/a as you prolly know doesn't yield a lot of hp per $. I agree. I had a small Crane cam in mine and then added Dart 205 heads that were as cast. They were roughly equivalent to the 243's and I picked up 20 hp with just the head swap.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 LQ4 is a 6.0L LS (Gen. 3) small block engine used in GM trucks between 1999 and 2007. For marketing purposes, it was also known as the Vortec 6000. The engine specs and information listed here is for the stock LQ4 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM …
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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 ...The L76—like its LS2 sibling—is a 6.0L, Gen. 4, aluminum small block engine that was used both in GM cars and trucks. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). The L76 was available in the Pontiac G8 GT from 2007-09. It was also used in some Australian Holden cars.07-16-2007, 08:03 PM. # 2. Y2Kvert4me. Race Director. Member Since: Oct 2002. Location: Gone. Posts: 16,477. Likes: 0. Received 18 Likes on 15 Posts. CI 6-7-8-9-10 Veteran. St. …The most popular upgrade is to replace the stock 317 cathedral-port heads on a 6.0 truck (LQ4 or LQ9) or LS2 (243 castings) with the rectangular-port LS3 heads. ... As I have come to expect from head porting, the power gains increased with engine speed. Equipped with factory (Chevy Performance) LS7 heads, the 495 produced 773 hp. ...Why not come to your next water fight properly equipped? An off-the-shelf squirt gun is too light weight and you can't drag a hose everywhere. Build a head mounted water-cannon and...C5 Tech - 243 Heads - Sorry for the dumb question - I have a set of 243 heads that I want to send out for a port and polish. But I also want to replace the valves, springs, trunion, etc. ... Though, if you do the math of what it costs to port your heads, and shipping, you come out real close to the price of their LS Brawler heads. That is a ...Mar 21, 2012 · On our Mast heads, the LS3 head offered both more intake and exhaust flow than the cathedral-port heads, resulting in an intake-to-exhaust flow percentage (372/261 cfm) of 69.89 (meaning the ...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.LS1 with 862 heads. I may have found an LS1 shortblock I can drop in my truck but I want to know if I can use the 862 heads from my 4.8 on the LS1. Also, what will the CR be if I use the 862's on the LS1. Thanks in advance. It will bump your CR up a hair, 4.8/5.3 heads and LS1 heads flow the same, the only difference is the combustion chamber.Dec 22, 2010 · 821/823 castings. im going to order ls3 heads but i would like to know the difference between 821/823 castings,i thought i read somewhere they were cast using a different process or something to that effect ,so which is better ls3 or l92 or is there no difference besides the map sensor. IBM 04/A4, #243 heads, Mild Blower cam by Comp …If the 706, 243, or the later 799 is the go-to head for any engine, the 317 is just right behind. ... .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 Heads. The 706 model is made to be superior to the common 862. The semi-permanent mold (SPM ...13305 posts · Joined 2004. #1 · Feb 26, 2007. I am second guessing myself, need some extra advice. I am about to swap out my stock 241 heads off my LS1 for some Stage 2E ported heads from MTI, casting #853. These heads flow 294.8 @.600 for the intake and 208.4 @.600 for the exhaust. Since this seems like going backwards (from …Beautiful set of 243’s are on the shelf and ready to ship. The heads are assembled and complete, no core exchange necessary. Orders placed before 3PM ship same day. FED .700 Lift Dual Spring Kit; FED Custom stainless Intake and Exhaust Valves, 2.040 / 1.575; Titanium RetainersChevrolet 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".SW LTs, SW Cat Back, HPE S-Cam, 243 Heads, Patriot Golds, HPE Tuned, Z06 Maf, ASP Pulley, K&N CAI, MTI TB, Bird of Prey Clutch, GMM Ripshift, AMW Catch Can, Harrop Diff Cover, Pedders Subframe Bushings, NGK TR6, MSD Wires, SLP 160 T Stat, RP Trans/Diff Fluids, Mobil 1 10-30, Dual Areoforce Gauges/Banshee Pod. ... Come discuss mods, horsepower ...JEGS LS Aluminum Cylinder Heads are the perfect replacement or upgrade for your LS-based engine. Starting with a new aluminum casting these heads are fully assembled with all new components including intake valves, exhaust valves, valve springs, retainers, guides, and seats. They are available in cathedral port and rectangular port designs to ...How much do 243 heads weigh? Which heads are better 706 vs 862? Are 799 heads the same as 243? How much HP can 706 heads handle? What did 823 heads …The 2007 year had three 5.3L motors offered. The 2007 Classic (still a NBS) had the 5.3L with either the L59 (flexfuel version) or the LM7. The 862/706s are on the 99 and up 4.8/5.3L motors. The only difference about the L59 motor was the injectors. 2005 and up motors had the factory electric fans and electric TB.Apr 15, 2022 · 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. Material Make. The 799 heads have an aluminum build that can withstand high temperatures. Aluminum is a good ...Same heads. 243/799 castings. But the LS6 (Z06) had hollow intake and sodium filled exhaust valves. Believe that is the valve arrangement. Either way, they had lighter valves. I went with a set of 243 heads off an 08' 5.3L truck engine. Sent them to Advanced Induction for their cnc magic. Get the set off the LS2.Upgrade your LS1 or LS6 engine with our RDid the 317 heads come on the 6.0 liters, and/ or would they be a So, casting 862 heads would do favors for your car with a perfect set up. Last Words. In a nutshell, the LS 862 heads are the best-performing, affordable, and ported 5.3 heads that will best suit your car. If you are looking for a high-performing cylinder head at an economical price, then the 862 LS heads are definitely a great choice.The helicopter that crashed in Iran on Sunday, killing the country's president and foreign minister in mountain fog, was a Bell 212 model, Iranian state media reported. SW LTs, SW Cat Back, HPE S-Cam, 243 Heads, Patrio 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 ... 5592 posts · Joined 2006. #4 · Jan 30, 2012. Mike, The 492 is an
GM Engine & Exhaust Performance - lm7 with 243 heads - hey, I am new here and have been looking at some of the posts. I am going to be pulling the heads on my 03 sierra 5.3 lm7 and was considering putting on some 243 heads with a .040 cometic gasket to bring the compression to 9.8. my concern was with torque, I use...Auto Parts Blog. 243 heads: 243 heads specs that make it special. By TheAutoly Team. 243 heads. Last updated on September 6th, 2023 at 04:12 am. …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.The 243 vs. The 799 Cylinder Head. As you have most likely caught on by now, these two cylinder heads are practically the same. The main difference between the 243 and 799 cylinder heads is that the 243 was used on older engines from GM Research, while the 799 has been used on newer engines from multiple manufacturers.
I did some extentsive searching for on 305 vortec heads and found little info.You want heads with a small combustion chamber to keep the compression up,the typical 350 head cc is too large.Can't confrim this but I did read that the 305 vortec didn't flow as well as the 350 vortecs but do have smaller cc's and is probably the best production head for a 305 and the 1.84 intake 305 are probably ...I had a close friend of mine hand port my 243 heads. After a re tune I ended up with about 25whp and 30wtq out of them. Im really happy with the results! Save Share. Like. ... I’ll give ya threefiddy, a jar of Vegemite and a box of boomerangs that may or may not come back. -- Olly.The LC9 engines also came with 799/243 heads. In 2008 and 2009, Chevy also had a simpler 5.3L engine designated the LH8, which can be identified by the letter L in the 8th digit of the VIN. ... The early LQ4 engines (1999 and 2000) were the only LS based engines to come with an iron cylinder head (cylinder head casting numbers 373 and 873 ...…
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No modifications to do a head swap, but if both are stock untouched heads the 241s have a 66cc chamber versus the 243s 64.5cc chamber. A slight bump in compression, but it shouldn't be an issue. I believe after 07, all 5.3 engines have 243 heads. Now that you're swapping heads, you should consider getting them ported beforehand. KerryHome ported 243 prelim head flow results. I decided to tackle my own heads for my build. I built a floating depression flow bench in my garage and practiced on some 853's first. They were flowed on a SF600 that is right in line with Mamo's bench. They were flowed with a wooden inlet piece that was smaller than my port.
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.Mar 21, 2012 · On our Mast heads, the LS3 head offered both more intake and exhaust flow than the cathedral-port heads, resulting in an intake-to-exhaust flow percentage (372/261 cfm) of 69.89 (meaning the ...
1713 posts · Joined 2004. #10 · Jul 28, 2020 (Edited) I have stage III 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, …799 Vs 243 Heads: Specification Comparison Table. Features. 799 Head. 243 Head. Casting: ... The 799 cylinder heads come with a 64 cc combustion chamber, ... difference, 243 head offers a more balanced ride as its smooth finish ensures better airflow. On the other hand, 799 head did ensure a powerful ride with a maximum of 25 HP. Unless your building something something over 7The 5.7L LS6 is the most powerful Gen. 3 small block engin Jun 13, 2015 · The early 5.3's had either 706's or 862's unless it was a "L33 HO 5.3" which only came in some trucks. My 04 Rainier has 862's, my 02 Avalanche had 706's. The 243/799 heads are one in the same, excluding the 243's that came on the LS6 motors as they had hollow stem exhaust valves and better springs, but everything else casting …Jul 29, 2006 · I think that the NGK TR55's come gapped at 0.050", but be sure to check. I ran a bit wider a gap at 0.060". At first the throttle response felt better, but after time I noticed that the fuel economy had reduced and my exhaust tips had turned black. Subsequently, I pulled the plugs and regapped them to 0.048". 4.8l with 243 heads. Jump to Latest Follow Jun 5, 2020 · 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 ... I was thinking more along the lines of a ported 243 castin12,557. The heads also bump the compression from 10:1 to 10The cost? Too much for the bang. If I didn't care about maintaini May 15, 2024 · The 799 cylinder heads come with a 64 cc combustion chamber, whereas the 243 comes with a 65 cc combustion chamber. While the difference seems ignorable, it is a known fact that a smaller combustion chamber will create more compression and improve vehicle performance.Nov 15, 2022 · This is a SET OF 2 Remanufactured OE Stock LS2, LS6, 4.8L , 5.3L, 5.7L, 6.0L Gen III / Gen IV Cylinder Heads Assemblies. * Part # : 799 also fits 243 casting * Description : Stock LS Series 4.8L / 5.3L, 5.7L / 6.0L * Specs : Combustion Chamber Volume: 64.45cc Intake Port Volume: 210cc Exhaust Port Volume: 75cc Intake Valve … Head and face reconstruction is surgery to repair or re 041's are a 1.94/1.50" valve 64cc head from the 1969 295hp 350 and the 1970 300hp 350,, same engine as none of the actual specs changed. The heads are better than low power crate engine heads. When using 64cc heads,,,, Flat top 327 is about 9.5:1 compression. Flat top 350 is about 10:1.799 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 ... Jul 29, 2006 · I think that the NGK TR55's come gaIf you are just installing stock heads wi 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.11. May 6, 2012. #4. Re: .243 case head separation. "I always just bump the shoulder back." IME, no bottleneck cartridge is any more likely to stretch enough to cause a head seperation than any other. Agree with Wade, you're likely 'just bumped the shoulder back' too far; that's the primary cause of head seperations. T.