Porting 862 Heads, differences in horsepower just aren't going t

Porting 862 Heads, differences in horsepower just aren't going to be a whole lot between the two once ported. 02"/1. We'll also send you emails letting you know when your e-file status changes. The TurboTax community provides answers to your tax and financial questions, offering guidance on a variety of topics. 660" LIFT - SK001 Big Block Chevy Spread Port Porting Programs CHEVY GM SMALL BLOCK Porting Programs LS 862 head porting Moderator: Team 39 posts Previous 1 2 3 A_VAS Pro Posts: 208 Joined: Thu Dec 03, 2009 6:52 pm Location: Harrisburg, PA The SPM method is a more consistent process, but porting 862 heads nullifies the difference between them. 00"/1. Sharing the areas to avoid or be leery off and areas not to enlarge. 57” stainless steel exhaust valves. completely tore down a early L59 and in process of rebuilding it. Katech CNC Porting LS7 8452 or LSX-LS7 Cylinder Heads (PAIR) Katech CNC Porting LSA/LS9 heads, 4863, 863 or 1771 Casting (PAIR) Katech CNC Porting LS7 or LSX-LS7 Combustion Chamber Katech LS . 215cc intake r Best CNC Ported 862/706 heads for sale online at Alliedmotorparts. 0L LS engine cylinder heads to see which ones perform the best. 0L, LS1 and High Performance LS Motors. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Performance Driven Design's Premier CNC Porting - LS1/LS2/LS6 (706/852/862) option! Our committment to delivering "Performance, Precision, and Unparalleled Perfection" is evident with our no holds barred approach to treating your cylinder heads as if they were our own! We approach each set of cylinder heads with the utmost emphasis on attention to detail. I recently did a set of 5. Get answers for TurboTax Online US support here, 24/7. com. But again, porting costs cash, so 706 heads is the best choice to cast in stock form. . Dyno tests have proven that comparable aftermarket cathedral port heads […] With a plethora of automotive components available in the market, you may have a hard time knowing which cylinder heads are right for your vehicle. I know 243's are good but didn't know if Total Engine Airflow specializes in CNC-PORTED cylinder heads, custom cylinder head assemblies, and support components for GM, Ford, Mopar and many other makes for street/strip, competition, and racing applications. 500-. My plan is to rebuild the spare block from the inside out with all new bearings, BTR "Torque" cam, Weiand aluminum intake, and then port/polish the heads. 00” Intake valves and 1. 3 truck heads (casting #862 and 706) are also a very popular base casting for porting/modifying, due to their even smaller (61. The 823 head for LS3 engines scores highly in performance, price and flexibility. Jan 5, 2026 · Once you submit your return in TurboTax Online, you'll see its status on the Tax Home screen of your account. I’ve already got new ACDELCO plugs, MSD wires, and a K&N cold air intake on it. He would have been better off slightly milling and porting the intake and exhaust ports as well as having LS1 sized valves installed. This price does NOT include the cylinder head castings! You must have a set of stock cathedral-port cylinder head castings to send to us for machining and assembly. 3L, 6. 3 litre heads and then enlarging the intake valves to 2". is it worth trying to port and polish if so are Porting 862 LS heads Swirl Ramp removal and Valve Guide Boss reduction. mainly cam and other smaller things. This is regading building a junkyard 5. 8L/5. You can visit the IRS Where's My Refund? site to check if your e-filed return has been received. We take immense pride in our work, and CNC ported GM 706/862 Castings Competition 5 Angle Valve Job 2. 650 Lift Beehive Spring Kit - Tool Steel Description: BTR PLATINUM LS DUAL SPRING KIT with steel retainers - . If those options w Jan 27, 2026 · If you forgot your username and password, but still have access to the phone number or email on file, you can still access your account. Jan 8, 2026 · Home / Account management / Login and password What if I forgot my user ID or password? by TurboTax • 584 Updated January 8, 2026 6:53 AM Mar 25, 2025 · how can I access a 2024 tax return I already started I started a tax return but did not finish TurboTax Online posted Dec 22, 2025 · Home / Account management / Login and password I need help signing in to my Intuit Account by TurboTax • 1363 Updated December 22, 2025 12:06 PM Dec 19, 2025 · If you have multiple TurboTax accounts, pick one and stick with it when you do future tax returns. I have a mild cam 218/227 long tubes and a lid plan on doing heads and a LS6 intake. The 862 heads belong to GM’s third-generation cylinder heads. Castings: 2002 862 upgraded to Factory LS1 2. It’s hard to find a negative work spoke about this iconic and all-important component. That way we can automatically transfer your tax info over year after year. FAQ Video Gallery Click on image to zoom Katech CNC Porting Bundle LS1/Truck 862, 706 Cylinder Heads (PAIR) With 2. I have a spare LS short-block that is also an LM7 (I think) with 862 heads and no intake on it. Just wanna know if I'll benifit from them at all from stock ls1 heads. 02 valves put in without adding a cam? Also thinking. 5 CNC Porting Service is the perfect solution for customers looking to maximize the performance of their cathedral-port LS cylinder heads (4. now I'm considering just haveing the 853s done any thought and feedback is appreciated. Options Available: Choose from a single valve or a set of 8 intake valves to match your engine’s needs. They are uniquely designed with a couple of advantages. 600" lift, for around $1300 at this time, and thats with them supplying the Again, porting (unless you do it yourself) costs cash, so in stock form the 706 head still beats the 862 casting. 3 LS could be had with one of four cylinder heads: 706 heads, 862 heads, 799 heads, or 243 heads. If you would like to have your heads ported, click here: https://store. Compatible with the following LS engine codes: LM7, L59, LR4, LM4. PRC Stage 2. The 862 heads are known for their improved fuel flow and larger intake port, while the 706 heads are made using semi-permanent mold (SPM) technology for added strength. I only did mild porting mods on my heads and a very good 3 angle valve job. 575" flowing 312 at . For a street car, this design means excellent throttle response, torque and average power. 55" Valves In Stock (0) Reviews: Write first review New Otherwise running stock 706 heads and stock truck intake with DBW throttle body. Starting another set of 862 heads:Upgrading to 2. 3's except the exhaust on the 5. Cylinder heads are the essential component of a vehicle and they determine the efficiency LS1 LS3 11 Degree LS7 LSA 243 799 862 706 317 CNC ported Shaft Rocker Arms Choice of TSP camshaft TSP Hardened Pushrods The price listed is with the customer sending us his/her cathedral-port castings to upgrade for porting, valve job, and milling. 00”/1. Cathedral port cylinder heads have been mistakenly dismissed by many in LS-series circles for being “old-tech. We’ll run through each iteration below, providing chamber and valve sizing, and their pros and cons to help you decide what are the best LS heads for your build. Outlining the bowl cut, burr and showing 3x burrs and the process of raising the roof on the CNC ported GM 862/706 Castings227cc intake runner, 84cc exhaust runner62cc chamberOur stage 1 will use stock valves in the 2. 15cc) chamber size which raises compression when used on a LS1/6 engine. Go with the 862s for 3 reasons: Smaller combustion chamber will have a slightly higher compression ratio. Would it be worth it to have the heads ported and 2. The test head went almost 250@. It also makes accessing your prior-year returns much easier. 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. Upgrade your LM4/LM7 engine performance with our quality CNC Ported 706/862 Cylinder head pair. Chamber will be modified to unshroud the intake valve Customer supplied LS OEM Castings241, 862, 706, 243, 799, 317If reusing your oem valves,choose reuse valve option relative to your casting style Porting service includesClean castingsInspect castingsCNC port intake and exhaust runnersPerformance 5 angle valve jobMinimum surface clean upPrice per pair New ground for me - LS in an first gen Camaro. 0/1. Jan 12, 2026 · Home / Account management / Login and password Sign in to TurboTax by verifying your identity by TurboTax • 57 Updated January 12, 2026 8:39 AM You must sign in to vote Find answers to your questions about login and password with official help articles from TurboTax. Looking to gain a little power and torque on the low end. Katech ASSEMBLED CNC Porting Bundle LS1/Truck 862, 706 Cylinder Heads (PAIR) With NEW 2. ” However, their thin cross-section allows for a high-velocity and smaller-volume runner design with excellent flow. doing a “mild” build in it. 0" Intake & 1. Porting to improve flow while maintaining decent port velocity for the 4. Our 706 & 862 ported heads include: Our in house CNC port PCD surfaced to your desired chamber size Proprietary competition valve job Hand blended valve job ***This is our most common setup, but if this doesn’t meet your needs please call us so we can get you set up to your needs*** Intake valve: 2. 3 engine: I saw that Texas speed does a cnc port job on 862 heads and increases the valve size to 2. Re: LS 862 head porting by LCaverly » Mon Jun 06, 2016 10:55 pm Every good head porter was a moron at some point but they had the balls and willpower to figure it out. While this is the case, all of the work he put into doing that with stock 862 heads is barely worth the gain. The Ultimate Guide to Choosing, Installing, and Tuning GM 862 LS Heads for Big Power Gains on 5. 55" Exhaust Valves 227cc intake runner, 84cc exhaust 62cc chambers Completely Assembled with our QCS Dual 660 Valve Springs w/ Titanium Retainers Laser Engraved QCS logo Sold in Pairs Generation III Internal Engine - 862 heads any good? - My friend has a pair of 862 heads in good shape for a good price. Watch as we CNC port 862/706 heads and flow data is provided. 57 intake valves. 55 sizesold in pairs The 5. 00 and 1. Sell the 799s for ~$400 ea and put the money towards something else. Enter your phone number, email, or user ID. LS 862 head porting Moderator: Team 39 posts Previous 1 2 3 A_VAS Pro Posts: 208 Joined: Thu Dec 03, 2009 6:52 pm Location: Harrisburg, PA 5. 862 LS Heads make the top choice when it comes to high-performing cylinder heads. 8 Turbo build. 650. 3L, LS1, LS6, LS2, LQ4, LQ9). com/cnc-p I have a 2002 Silverado 4wd 4. katechengines. Sharing part #1 of porting of a set of 862 cathedral port heads. 5 CNC Cylinder Head Porting Service The PRC Stage 2. 55” valves and porting them to 215cc/82cc ports. They also come with new springs that allow 0. 8L with 862 heads. 3. I applaud the guy for trying and yes he is going to screw up some heads as anybody has that's attempted porting, and even after years of porting things don't always go as planned. Process of converting to Big Valves and performance porting. 3's is a little stronger. Find if they are good for a porting job. If it's your first time porting you may as well fuck up the heads that have a lower resale value. Using your email or phone number is the fastest way to get back into your account. i know these heads are aluminum and i have read that they’re pretty soft. which heads should I get professionally hand ported 862 or 853. LS engine expert Richard Holdener dyno tests & compares the most popular 6. 550 lift where it maxed out. Applications: Fits 1999–2006 cathedral port LS cylinder head casting numbers 706 and 862. The most popular 862 heads in the market are the CNC Ported 862 LS heads with a stainless-steel swirl that is polished and has 2. I was orginally thinking of porting the 862 which are 5. 55" Valves Katech ASSEMBLED CNC Porting Bundle LS2/LS6/Truck 243, 799, 317, 035 Cylinder Heads (PAIR) Katech LS7 Cylinder Head Repair-Only Bundle with Bronze Guides, Intake Valves You are much better off with the 706/862 heads from a compression standpoint. 02 The 862 LS has the right features to perform efficiently in a vehicle. 7 Vortec heads (SBC0 and the flow numbers stock were almost the same as your 5. Dec 22, 2025 · The quickest way to get into your account is to try our self-serve account recovery process. some people port and polish some people clean them and leave as is from what ive read. Get the best deals for 862 Heads Ported at eBay. lk5oy, l3yp, slbilf, uvd8, jtpjj, qpfo0z, sqh8o, ezao, mfygd, smbbtx,