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 ...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 …
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Tested on a different application, the results would certainly be different. On many of the heads, the results varied by only a couple of horsepower. In the grand scheme, that's insignificant....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 ...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 headsSort by: Add a Comment. J8ke_Stampede. • 1 yr. ago. There's no debate, it's been proven the 862/706 heads will make more power than the 317's. 317's and 241's are the worst factor LS heads. It's also not only because the chamber size and compression ratio either. 862/706 heads have higher velocity and better coefficient of discharge. 8.
I recently heard that the 862 heads outflow anything else out there for the LS platform. Is this true? I'm currently running the 799 stock on my 5.3. But I can pick up some cheap 862 heads locally. Got a long list of things I'm about to do on my truck, just wanted to ask to see if it would be worth switching up the heads while I'm at it.ddawson. 15570 posts · Joined 2004. #4 · Sep 29, 2008. The 317 is a 243 but with a larger CC. I have the 317 on my car with 70CC. 1969 Corvette, 427 Convertible. 496CI Edelbrock Heads, Quickfuel Carb, LS6 Intake. Straub Technologies 229/235 .590/.559 107, Hedman Headers, Magnaflow Exhaust. Speed Direct Rack and Pinion, …Is it worth it to get them cnc'd vs having the ls1 heads cnc'd? I thought the 2004 GTO had 243 heads My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto …Showing the progress Porting the 862's for my Turbo 4.8 project. Yes it's a slow process and I limit how much I can do each day.I'm in the dirtiest portion ...Jul 10, 2022 · You are much better off with the 706/862 heads from a compression standpoint. Also, the port velocity on the 706/862 head is much better than the 799/243, which will help you with the small bore of the 5.3. The 706/862 respond very well to a light runner cleanup and a good multi angle valve cut.
More video to come. Put new heads and new cam in my 6.0 lq4 283 int/286 exh 114 LSAAug 1, 2023 · The 862 Cylinder Heads. Features and Specifications. In contrast to the 243 heads, the 862 cylinder heads are typically made of cast iron, which makes them heavier but also more durable. They have smaller ports compared to the 243 heads, which can limit airflow to some extent.…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. It uses a shorter case than the .243 Winchester—1.920-inch vs. 2.045 . Possible cause: 706 5.3L HEADS vs 241, 799/243 vs 317s. WHICH HEADMAKES MORE? W...
Run with the 317 heads, the modified 5.3L produced 448 hp at 6,800 rpm and 398 lb-ft of torque at 5,000 rpm. After installation of the 706 heads, the power jumped to 468 hp at 6,800 rpm and 413 lb ...ported 243s, ls2 stock shorty + cam. procharged. 740~whp. That sounds healthy. If I can pull off 700 rwhp like that through my A4 for the time being with 234's or 317's I think I'll be satisfied. SOFAKINGGR8 said: Numbers in sig, recently made over 700whp a few weeks ago, and have been over 600whp since April.
241 vs 243 the 243 is a better head. Ported vs Ported the 243 is a better head. The AFR heads are 205CC intake runners. They do this to keep velocity up. Many porters go larger then this "225+" which can effect you TQ curve at lower RPM's. I'm using a set of 317's with 225CC intake runners that flow 310 at .6000.863. Rectangle. 4.750" +- 0.003". 12604861. 12610716. 12675872. Share this article. We've tried to boil down the GM part numbers, casting numbers and other LS cylinder head information into an easily usable (and ideally definitive) cross reference. Note that we're not perfect and some of this data may not be perfect so use it for what you will.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.
model t701 thermostat reset 862 heads vs 243. The 862 casting number represents the 862 cylinder head. The 862 heads came on all LQ9 6.0 engine blocks and are completely interchangeable with the 243 cylinder head. Both the 243 and 862 heads have the same 64cc combustion chamber, but there are some very slight differences in the pore size of … gresham chrysler dodge jeep ramga snap eligibility calculator The 706 Vortec heads are even slightly superior to the commonly found 862 heads. The reason is that the 706 heads are SPM ... these are basically 243 heads; See All 5 Photos. Vital Specs for 706 ...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 ... can you lock the volume on an ipad This program works on the following head casting numbers: 243. 799. 317. 035. Now you can get this porting service on your cylinder heads at an incredibly low cost! Simply follow this procedure: Remove the cylinder heads from your car. Disassemble cylinder heads to completely bare condition.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. caci background investigator salaryliberty dispensary fort walton beachwhich one of the wayan brothers died 227cc SBC Race Cylinder Head. AFR's 227cc "Race Ready" and "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. This head features 60/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake ...Where the stock 243 heads featured 65cc chambers, the 317 heads featured 72 cc chambers. The 317s were given the nod over the 243 since they offered the larger chambers that most closely duplicated those on the LS3 (71cc). The biggest difference between the 317 cathedral-port heads and the LS3 heads was the port shape and … crossword clue unpaid debts Sort by: Add a Comment. J8ke_Stampede. • 1 yr. ago. There's no debate, it's been proven the 862/706 heads will make more power than the 317's. 317's and 241's are the worst factor LS heads. It's also not only because the chamber size and compression ratio either. 862/706 heads have higher velocity and better coefficient of discharge. 8.For the 862 heads, the intake valve size is 1.89 inches and the exhaust valve measures 1.55 inches. The 706 heads, however, feature an intake valve size of 2.00 inches and an exhaust valve size of 1.55 inches. In terms of port volumes, the 706 heads have larger intake ports. reading eagle obits past week2000 kenworth low air pressure switch locationmark charles misilli bag sealer i have ran both heads unported on a 6.0. my car trapped 148 on pump gas and meth with the 317s with a vic jr intake with a bw 80mm turbo. now i use a garret budget gt91 with a holley hi-ram on e85 and have trapped a best of 161. I have a BW s480/92mm/1.10a/r, either vic jr/carb blow through, or efi truck intake manifolds for both.Got lucky at a local junkyard and snagged a set of 862 heads off a wrecked z71 2000-2006 body style. thinking about building these (port n ... (Pressed) The SPM cast is 100X better than sand cast heads. That is why the 243's are SPM cast over the truck version 317's, and the L92's 823 Sand cast VS the LS3's 821 SPM cast.. starting to ...