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A good shower doesn’t just get you clean; it also relaxes and refreshes the body and spirit. If your shower isn’t blissing you out, perhaps it’s time to upgrade to a shiny new show...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.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)Swapping in 243 heads will increase flow a little, but unless you mill them first, you'll lose compression. If anything, you want to raise compression. For just a basic bolt-on 5.3, the 862 heads will do a decent job. Texas Speed has ported 5.3 heads for a reasonable price if you want more flow.You are going to make more power with 243's than 853's no matter what. Now it comes to cost vs. results. For the $600 or so for a stock 243 head, I probably wouldnt do it. In our experience, the best "budget" 243 heads are the Patriot Stage II LS6 heads. Those heads, with a LG G5x3 has been one of our most proven budget orientated power combo's.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 ...If so, the 862 has a tiny 1.9 intake valve. The 317 head has 2.0 valve and a larger intake runner cc, like the LS6. The 862 in a good bench make 220ish cfm, 317s as much as 257 or so. Just has a larger combustion chamber.Mar 13, 2018 · 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 ...The first has to do with port shape. The LS6 and the later LQ9-LQ4 heads used reshaped intake ports and D-shaped -- as opposed to oval-shaped -- exhaust ports for better flow: 200 cfm intake and 70 cfm exhaust for the 241's, and 210 intake and 75 cfm for the 243's. The second major difference is that the LS6 heads used hollow, sodium-filled ...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.CNC Ported LS 5.3L 706 / 862 Cylinder Heads, Customer Supplied Bare Casting. $599.95. Buy in monthly payments with Affirm on orders over $50. Learn more. Options. Resurface for MLS Gaskets + $150.00. Valve Job with new Valve Guides + $400.00. Cylinder head Assembly + $150.00. Add to Cart.Cathedral port heads. Results in the video.641 posts · Joined 2011. #1 · Dec 30, 2021. What size intake valve can I put in the 862 LS truck heads, going on a 5.3 engine? They are 1.89 right now and I was wondering if it would be worth putting a 2.02 valve in them with some port work. This will have a turbo and a decent size turbo cam. Thought about looking for some 243 or 317 heads ...So how do 862 heads compare against the factory heads these engines come with? The 5.3L LM7 crate engine from GM trucks feature stock 243 heads. 243 …s10xtremist Discussion starter. 7846 posts · Joined 2006. #10 · Dec 26, 2012. Iroc-10 said: They ran the yellow springs on most of the 243/799 heads, because in the end, they ran them on the GTO, and TBSS, as well as the higher HP 5.3. Looks like sodium exhaust valves are about 65 grams and the intakes are 74 grams.No parent wants to think about losing track of their kids in a crowd, but it's best to be prepared just in case. No parent wants to think about losing track of their kids in a crow...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 ...The biggest difference is price, .. 18* heads can be had for around $3200. while a professionally ported set of new SB2.2's built for your application. can cost over $5500 bare, .. Hope this helps, .. Curtis. Race Flow Development.Here's my thinking. The 243 has. 2.00 intake and 1.55 exhaust with a 65cc combustion chamber. The 706 has. 1.89 intake and 1.55 exhaust with a 61cc combustion chamber. If I have a set of 2.00 intake valves put in the 706 with the smaller combustion chamber wouldn't I have a better head with more compression and that's not counting if I ...CNC Ported LS 5.3L 706 / 862 Cylinder Heads, Customer Supplied Bare Casting. $599.95. Buy in monthly payments with Affirm on orders over $50. Learn more. Options. Resurface for MLS Gaskets + $150.00. Valve Job with new Valve Guides + $400.00. Cylinder head Assembly + $150.00. Add to Cart.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 ...Pretty good snowstorm today. I did the Caddy lifters at the suggestion of Ryan at GPI along with some LS3 intake valves. The hollow LS3 valves were significantly lighter than L92 valves. If I remember correctly it was something like 89g for the LS3 valves and 123g for the L92s. Lets Go Brandon!If you're contemplating 862 heads Vs.7477 posts · Joined 2005. #29 · Nov 2, 2013. Stock 243 heads are goo 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. 05 LS2. I know the cam is .525 on both sides, but ho The 862 heads are pretty good because they can deliver better compression after a porting job. However, the cylinder heads may not flow well compared to 243 heads. Also, 706 heads are considered to be superior to 826 cylinder heads. 826 cylinder heads are not as sophisticated as some of their counterparts.The final test was the 246 cam, with .624 lift, a 246/254 degree duration and 114 degree LSA, but with less-than-stellar results. The peak horsepower numbers remained at 626 hp, but peak torque dropped to 575 lb.-ft. In fact, torque production dropped through the entire rev range! Sometimes, even on a stroker, bigger is not always better! the 862 heads are off of a 2000 5.3 while the 706 h

May 7, 2023 · Street Performance of The 706 Head. It’s worth noting that the 706 heads have a larger combustion chamber than the 862 heads, which measures at around 71cc. While this might sound like a disadvantage, it can actually be helpful for engines running on lower-octane fuel or those using forced induction.Easier to replace a head if more than a few. Yes, it's 2009. I've already discussed it with service guys and they said that it's ok, 823 and 5364 can be installed together even in Arlington on factory because it's absolutely the same. This is an older thread, you may not receive a response, and could be reviving an old thread.I'd be into the 243's for more than the "Proheader" heads which claim pretty good flow numbers and have larger SS valves. ... Had originally planned to run the 862 heads. Then found a set of 243's for $300 and figured I might as well grab them… now I found these. Save Share.The 706Vortec heads are even slightly superior to the commonly found 862 heads. The reason is that the 706 heads are SPM (semi-permanent mold) made, while the 862 heads are sand cast. The SPM method is considered to be a more consistent process, but once you port the 862 head, any difference to the 706 head goes away.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.

GM never made an iron LS1. Look at the front of the block and it will clearly have the displacement cast into it. If it is a 5.3, slap some 243's on it and a punchy mid range cam in it and it'll be a good street brawler. If it is a 4.8, some aftermarket heads with revised valve angles and dual valvesprings (TF Gen X 205 for example) and a cam ...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 ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. 862 vs 706 Heads. The Chevy 706 LS Heads are superior to the m. Possible cause: The 799 cylinder head is a better choice than the 243 cylinder head because it h.