Ls3 head flow numbers Save up your pennies because these fresh castings command $1,299 each. If I could see a flow chart for the original LS2 heads (243) it would be of great help. Frankenstein’s flow data is good, but it does not tell the whole story. Jul 9, 2012 · Nevertheless, the additional flow offered by LS3 heads translated directly into power, as the LS3 head swap increased the peak power numbers to 581 hp and 543 lb-ft of torque, an increase of 38 hp Feb 20, 2015 · Here is a helpful link to answer cylinder head question. They're fully assembled with valve springs, retainers, l I go over the AFR LS3 head and give flow numbers from a 4. 2L BOSS heads going to flow? The LS3 has some flat out awesome flow numbers for sure! 276 CFM at . comEmail: The LS3, LS9 and L92 all use the same cylinder head foundation, featuring a four-digit identification number. 500 334 240 0. Used extensively on both 4. Jan 3, 2013 · No other changes. Thanks so much for the truely awesome site and flow chart info that was on that site. Flow numbers hit an amazing 390 cfm at . 590 valve combination, and accept all standard LS3 components. 165 Hollow Stem Stainless Steel Intake Valve 1. 450" 308 CFM at . Some say FLOTEK High Performance Cylinder Heads 1712 Read Street, Evansville, IN 47710 Phone: 1-800-270-0095 I Fax: 812-421-0983 Intake Port Volume: 281cc Exhaust Port Volume: 98cc Our 281CC LS3 / L92 / L99 / LSA head was developed specifically for the stock displacement LS engine to deliver improved cylinder fill in the lower RPM ranges while adding substantial airflow increase in the upper Ranges as well. 550 348 249. You could have a bad head and get something better or just the opposite. The factory-built motor dished out about 430 horsepower right out of the gate, and the cylinder heads play no small role in that impressive output. Overview: Get big power on a small budget with BluePrint Muscle Series LS cylinder heads! These lightweight aluminum heads bolt up to your LS engine and feature 259cc intake/102cc exhaust runners, 70cc combustion chambers, and 2. AFR’s MONGOOSE LS3 Rectangle Port cylinder heads are 100% 5-AXIS CNC ported and made with A356 aluminum. 00 shaft system to run. That said we use much of this internally as we're applyin Flow LS3 heads. A tall-deck RHS aluminum block offered the capability to swallow a massive AFR LT-1 / LT-4 / Vortec Heads/ Late Model TBI/TPI Heads - Your factory accessory bolts and center bolt valve covers need to be shortened 3/16" or they will bottom out. That is more info than I have ever seen in any one place. ---danfigg 1 day ago · Trick Flow® by PAC Racing dual valve springs, titanium retainers, . Mar 21, 2024 · We revisit the AFR LS3 ENFORCER Head collaboration between @Boostismyfriend @nigelstst @DavidVizard and @UnityMotorSportsGarage I show the flow numbers that Jan 12, 2014 · I recently fell into a set of 823 heads or "LS3" square port heads that I ported. So lets just leave it at that. The LS3 heads hit the flow bench. Your AFR 260cc LS3 cylinder heads were designed to use the OEM length rocker arm bolts (52. Power production was every bit as impressive, and the average numbers were bettered only by the Trick Flow GenX head. 0:1 Compression on stock LS9 or LSA engine 10. Six-head-bolt provisions come standard to match aftermarket blocks and provide extra clamping force. 125" BORE @ 28 I reviewed the Afr Ls3 enforcer heads. 2 w 6l80e BOAT: 1996 Checkmate Convincor 253- 502 EFI Procharged 82 MPH Apr 17, 2021 · There was a good test going on ls1tech on an ls3 vette and he went from a nicely done set of stock heads to fully worked Hooper ported china heads and gained 8hp. 065" Bore Plate Lift Intake Exhaust FLOW DATA: CFM AT 28 INCHES LIFT INTAKE EXHAUST 0. See dyno charts, flow data, and power differences of cast and CNC-ported heads. For example, we have seen as much as 15-20 cfm difference in stock heads that have the same part numbers. Jun 22, 2021 · As luck (or design) would have it, the LS3 was blessed with plenty of head flow right from the factory, but that doesn’t mean the stock heads can’t be improved on. 100 . this small-bore rectangular-port LS3 head was designed specifically for a 4. They feature 276cc intake runners and 92cc exhaust ports, along with a combustion chamber volume of 68cc. dart cylinder heads - ls3 - pro 1 - 280cc - 68cc chamber - 4 bolt - bare - 11030153 Dart Pro 1 aluminum heads for GM LS Series small block V8 engines take performance to the next level. Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software Not trying to stir anything up. Fit any LS engine with Chevrolet Performance LS3 cylinder heads. 600 363 252 0. 3 Stage 2 823’s on the assembly bench. 500 334 240. From a flow rate standpoint, the stock heads offered 306 cfm while ported heads stepped things up with 338 cfm. 165 in. 250-inch valve on the intake side, with the same 1. These seasoned GM LS3 heads have finally been given a chance to breathe after a full treatment on our state-of-the-art CNC equipment. initially. Oct 1, 2010 · The massive flow potential of the LS3 heads allowed GM to reach its power goals for the production LS3 using relatively mild cam timing. 10/1. Cylinder heads that arrive with no sales order number will be refused and returned to the Customer at the Customer’s expense. 400 294 215 0. com You are browsing camaro5 Many hours of R&D have gone into the development of this powerful LS3 CNC program. Put your $$$ in solid roller . The only time you are going to see a performance difference is when there is a casting shift that affects the head flow. Great cylinder head airflow has always supplied the LS Series with exceptional Jul 24, 2018 · Ok so I've now done the full test with the procomp ls1 cnc heads (eBay heads, speed master heads - part number PC3017). . This budget friendly head is perfect for your OEM engine operating below 6300 RPM. I show flow numbers and measurements from the heads. Website www. Dec 24, 2017 · The 241 heads were used on 5. 400" 295 CFM at . I also show the highest flowing LS3 heads I have flowed. That includes porting on our 5-axis, a CNC valve job on our Newen Contour and getting milled to perfect flatness on our Berco (see videos down below). 2L cylinder heads, this service is Cyl Heads, AFR Mongoose Street, LS3 4-Bolt, 260/95cc, 69cc Chamber. of water restriction, and to nearly 370cfm at higher valve lifts. Intake runner volume - LPE CNC: 275cc - Stock GM: 261cc Exhaust runner volume - LPE CNC: 93cc - Stock GM: 89cc Chamber volume: 69. S. If you don't see what you are looking for on the website, give us a call at (812)-576-2371 . 500" 276 CFM at . 600" The 6. AFR’s 260cc LS3 "Mongoose" heads feature 100% CNC ported intake, exhaust and chambers using our advanced engineering and flow techniques to produce the ultimate Rectangle Port head available today. and you can run all of your factory hardware!!! 4. I lost count how many LS3 ported head strokers got 480rwhp which would really **** me off. 400 302 228. 200 146 113. The LS9 head like the LSA head is a 356 alloy which is much better than the 319 alloy of the LS3 head. The BR 3 series shares all of the legendary BRODIX features including easily repairable A-356 virgin aluminum alloy and the strongest deck surface in the industry. 700-inch lift, unheard of for an LS3-style port. As can be seen the FII head has shown a higher CFM and velocity with smaller ports on both intake and exhaust. 63:1 Compression on LPE low compression 417 CID short block 9. 200" 146 113. Bore size: 4. The LS7 cylinder head is equipped with a single straight valve spring while the LS3, L92 and LS9 feature a tapered “beehive” shaped Jan 13, 2017 · It’s one of Dart’s 427 ci LS Next short-blocks outfitted with stock valvetrain components (including stock LS3 rocker arms), Dart’s Pro1 LS3 cylinder heads, and topped with an Edelbrock Super Victor Dominator-flanged LS3 manifold equipped with a Nitrous Outlet puck nitrous oxide system. In back to back testing at . o Surfacing – Flat or angle milling will affect flow numbers and may require a thicker intake Dec 12, 2021 · Does any one have experience with either the liberty or promaxx ls3 heads ? The Trick Flow LS3's 255's are also real nice. 700” on both intake and exhaust. We ran the Jul 14, 2017 · The right head and cam package went a long way on the LS3 crate engine supplied by Gandrud Chevrolet. Transform your GM LS3/L92 cylinder heads into high-performance powerhouses with our professional porting service. 125” Bore. 60 valve package, and peak flow numbers of 372 cfm on the intake and 261 cfm on the exhaust. Trick Flow GenX 255 cylinder heads are emissions-legal under CARB E. Get the Best Performance with Chevrolet Performance LS-Series LS3 Cylinder Head, Assembled 12675871 parts at JEGS. 5 9. They're available bare or assembled, in both cathedral port and square port designs, for applications ranging from street cars and trucks to all-out racing Many hours of R&D have gone into the development of this powerful LS3 CNC program. Jul 8, 2015 · As Borowski and Dart have worked very closely together on R&D for Dart’s LS Next program, it was fitting that Ken McCaul and his team had the opportunity to test out the Pro1 LS3 heads before anyone else. 700 382 258 100% Fully CNC Ported 260cc Intake, 100cc Exhaust & 69cc Chambers Virgin A356 Aluminum Castings 6 Bolt Head Casting with Extra Strength Decks Advanced 11° Valve Angle for Maximum Flow & PTV Clearance 2. 700 Lift Dual Spring Kit; Severe Duty Stainless Intake and Exhaust Valves, 2. Equipped with our Stainless Steel valves and TSP/PAC Dual . 600" exhaust valves. But it really shines is Oct 26, 2019 · Though this process works on a number of different LS (and other) heads, we opted to try our hand on a set of 706-casting 5. All flow numbers for AJPE — Alan Johnson Performance Engineering heads come from their Web Site updated Aug. 20 or 2. 500 333 244. Testing of 11 different LS3/L92 rectangular-port heads with a 468ci stroker engine. Most flow numbers for AFR — Air Flow Research heads come from their Web Site or '05/'12/'13 Catalog, updated Aug '16. 650 lift. Flow numbers are measured on 4. The Trick Flow LS3's 255's are also real nice. 165” Intake Valve 21-4N Alloy & 1. Many of our assembled heads use premium machining and materials, including CNC finishing and porting, along with lightweight, hollow-stem valves, sodium-filled exhaust valves and – on some heads – lightweight titanium intake valves. ” They have since been surpassed by the likes of LS7 heads for 7L engines, but the LS3 series, including the 823 cylinder head remains an all-time design classic. FED Custom Billet Rocker Stands Included (Must Use OEM LS7-Style Rockers Oct 22, 2014 · For our testing, we chose the two LS7 heads on opposite ends of the scale, the 265cc (PN 510-206) and the 305cc (PN 510-209). 400 - 201 cfm Jan 19, 2015 · If you have to stay LS3 architecture, I would get the Brodix BR3's. The cylinder heads will fit any LS engine with Apr 16, 2008 · Could someone look for the casting number on their cylinder heads. 8. 040 bore, and a 70cc set up for a 4. Aug 27, 2012 · Bigger intake and exhaust valves (2. 200 . Mar 2, 2004 · C4 ZR-1 Discussion - LT5 Head Flow Numbers - Anybody have flow numbers for stock LT5 heads Intake & Exhaust? . 200 178 137. 20" valve. 700" 382 258 Tests conducted at 28" of water (pressure). Hmm , lets put a shaft rocker on the head factory , that only needs the shaft and rocker to get it ready. 600 355 253. ) must have a sales order number which is provided by a Frankenstein Engine Dynamics salesman. 60 valve package with a 238/85cc port volume package to maximize airflow. As we have come to expect of the LS3/L92 heads, the exhaust flow lagged behind the intake significantly at 226 cfm. Mast Motorsports I show the before and after flow numbers from some 821 Ls3 heads Mar 27, 2012 · The Test. These heads are assembled and complete, no core exchange necessary. 3L combinations, the 706 Trick Flow engineers used the best features of OEM GM LS3 and LS7 cylinder heads, combined with their own race-winning engineering and technology, to create the GenX® 255—the ultimate ultimate square port LS cylinder head for 4. Of course, due to the much larger intake valve in the LS3 heads, comparatively they flow better everywhere (low lift, mid and high) but they have a 70cc chamber. Dec 4, 2009 · Okay GM'ers what are the Ford 6. Jan 21, 2022 · LSA and LS9 heads were basically an improvent on the LS3 head, but for emissions and improved driveability they have a flow vane in the intake port. Apr 20, 2017 · Factory heads flow around 300 (less then a stock Ls3 head) despite the 12 degree valve angle. 250" The new FLOTEK LS3 head features as-cast high flow intake runners that flow significantly better than the stock LS3 heads. Jun 20, 2011 · The only difference is the 821's can be a LS3 head and have the lighter intake valves and yellow valve springs but still them same head and flow. 165/1. As you can see, the airflow level of cylinder heads is measured by CFM (or cubic feet a minute). 165" intake/1. GenX 255 heads are available with standard and 6-bolt per cylinder mounting patterns. 2091Part Type:Cylinder HeadsCylinder Head Style:AssembledCylinder Head Material:AluminumCylinder Head Finish:NaturalCombustion Chamber Volume (cc):64 ccCNC-Machined Combustion Chamber:NoIntake Runner Volume (cc):250 ccExhaust Runner Volume (cc):n/aCNC-Machined Intake Runner:NoCNC-Machined Exhaust Runner:NoIntake Port Shape:RectangularIntake Port Prices include checking your valve guides for proper size, if your heads require guide replacement the cost is $9. 2L engines. 155”. With stout flow numbers and an efficient port shape, the LME CNC ported LS3 offering is truly bolt on performance. Trick Flow® GenX® 280 HIP cylinder heads for GM LS3 work with all LS3 intake manifolds and LS9/LSA blower assemblies and fit all LS head gasket and engine block combinations. These Chevrolet Performance CNC-ported LS3 cylinder heads flow more than 350 cfm at 0. 300 231 171 0. 5mm). 5cc, since a camshaft peak valve lift is generally between 0. Minimum of 4. 700 382 258 I also like the fact that it has 12 degree valves instead of GMPP's 15 degree valves. 400 Would anybody also have ported head #'s. 030-bore Jun 29, 2011 · Tested on the flow bench, production LS3 heads flow as much as 315 cfm right out of the box. Next to the AFR 245 heads, the TS heads offered the highest 0. 20" valve, after working the short side and blending the port, some of the ports were close to 390cfm, that's about all your going to do with this type of head with a 2. 300" 223 CFM 170 CFM. 700 Dec 1, 2010 · The new Air Flow Research (AFR) 245 heads offer impressive flow numbers, registering 352 cfm at 0. Check out the results of our big LS3 head comparison. 300 237 176. 823/5364/2716 L92 heads 68cc. Casting # "823" is a U. 180 / 1. 700 Oct 9, 2013 · CAR: 2005 Corvette C6 - Procharged, Kooks LTs, Corsa exhaust 540 RWHP TRUCK: Cadillac Escalade - 6. 400" 282 CFM 198 CFM. 600) on the correct test bore and pipe for a 6. 100 71 59. The LS7 heads have pretty bad exhaust side flow but the speed is clearly the winner there as it is here. 500" 321 CFM at . In terms of peak flow, the 241 heads offered 242 cfm at 0. 500″ and 0. 96. 260cc LS3 Cylinder Head - Air Flow Research . The heads on the car are bone stock LS3 heads and have not been flowed but I can assume they are in the ball park of other as cast LS3 heads ( 319/210 @. SpecsBrand:SpeedmasterPart Number:PCE281. 100" 71 59. Nov 8, 2017 · Pretty nice flow numbers. 125 bore LPE CNC L92 LS3 Flow Specs Intake valve lift / Exhaust valve lift . In as-cast for this head moves only ~310 cfm at a whopping 260 cc port volume. Jul 18, 2021 · I flow heads after milling them. 590 in. These aluminum masterpieces of performance feature port and chamber designs based on popular and performance-proven production-style heads, such as the LS3/L92 and LS7 heads. With a smaller valve and port, this head outflows your OE LS3 casting by up to 20CFM at low lifts, offering greater performance potential. Oct 19, 2023 · I discuss the Afr LS enforcer heads. Featuring A356 aluminum castings, titanium retainers and the highest quality components, throughout. 700+ lift and watch it fly. Unlike its predecessor, the Mast 11-degree head uses any LS3-style rocker arms rather than a special set of shaft-mount rockers. 065"; exhaust with 1 7⁄8" pipe. A 64CC set up for a 4. 8- and 5. LS3 Cylinder Head Assembly • Aluminum performance head • Fits any LS family engine with 4. com Jan 9, 2024 · Higgins ls3 and small bore ls7 heads flow numbers. Look for actual results on LS1tech for strokers running ported LS3 garbage. Jul 29, 2007 · You get what you pay for. AFR 260cc LS3 cylinder heads have an intake to exhaust rocker bolt centerline of 2. Trick Flow GenX 255 cylinder heads have an intake to exhaust rocker bolt centerline of 2. Reinforced rocker stud . Part Number: 809-12675871. The charts below show the difference between stock flow numbers as well as the flow after our modifications are made. Sep 16, 2014 · I think the trick flow 255 ls3 head shows some promise too. 200 - 116 cfm. Call (855) 806-1147 or Order Online! Dec 23, 2024 · Trick Flow engineers combined the best features of factory GM LS3 and LS7 cylinder heads with Trick Flow’s own unique brand of race-winning engineering and technology to create the ultimate square port LS cylinder head for 4. I think the rectangle port heads are the way to go on a n2o motor IMO. This wil Apr 2, 2020 · EQ's CH364C head (or CH364CA, assembled) ostensibly replaces Gen IV cylinder head casting numbers 364, 716, 821, and 823 in the OE repair/rebuilder world, but performance enthusiasts will know it Flow LS3 heads. 125 bore. Raised Intake And Exhaust Ports For Superior Efficiency. Your Trick Flow GenX 255 cylinder heads were designed to use the OEM length rocker arm bolts (52. 000" and larger bore engines. Jan 5, 2006 · Infomaniac, I looked again in the Dart web site and I can't find any flow data, only specs. 000" bore or larger Jul 26, 2016 · The 317 offered peak intake flow numbers of 244 cfm, but the LS3 head peaked at a whopping 318 cfm! The LS3 head offered an additional 70 cfm over the stock 317 head! Since bore size was a major concern for the head upgrade, we selected an affordable 6. Otherwise hit up TEA for ported 243's. '16. These are equipped with AFR's standard 3/4" thick deck, with thicker port and combustion surfaces. But even the "out of the box" numbers are awesome. Sep 24, 2015 · The flow capabilities are unmatched at this runner size, which means torque does not suffer when bolting on Mast’s fresh casting. 59 exhaust of your standard LS3) also help out with the better flow numbers, making the LSx-LS7 heads ideal for many forced induction applications. Edit: When I said small bore I meant 3. Wilson Manifolds ported blower, NW 102 tb, BTR Stage 1 PDS cam kit, Hutter Racing CNC ported Minimum of 4. But there can be probelms here too. 100 74 89. Everybody misses the big picture w/ ls3 head flow and that is they need a lot of lift and rpm to make the head work. ls7 heads flow around 340-345 stock Feb 4, 2017 · These are the flow numbers from my Dove FE Hi-Riser heads with just a good valve job using a 2. 2L. 500" 334 240. 660 Spring kit with Titanium Lift Value Intake Flow CFM Exhaust Flow CFM. 300" 231 171. FLOTEK High Performance Cylinder Heads 1712 Read Street, Evansville, IN 47710 Phone: 1-800-270-0095 I Fax: 812-421-0983 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. They have a wing in the intake port that hurts flow-but for $180-it's a badass head. 300 - 230 cfm / . 125 bore 2. 200 - 116 cfm Find Chevrolet Performance LS3 Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Fit any LS engine with Chevrolet Performance LS3 cylinder heads. When the MONSTER Series™ finally came to life it turned a lot of heads. M311 273cc LS3 Cylinder Heads (SET) – LIMITED DEAL $ 2,999. Not long ago it took a pretty serious 23-degree small-block head to achieve these same flow numbers Dec 24, 2017 · The 241 heads were used on 5. thoughts and Cylinder head ls flow chart chevy heads innovations charts castings chi l76 l92 l98 Ls3 heads off lsa flow numbers Going with the flow Dart ls3 ls1tech llr horsepowerSema 2014: blueprint engines debuts sbc block, shows ls3 heads Dart pro 1 ls3 heads flow chartBig h/c cars inside Jun 4, 2015 · Aftermarket LS2 heads flow similar number to stock LS3 heads so does anyone see me making the numbers i'm looking for with the above cam and aftermarket LS2 heads. Introduced in 2008 as the new standard powerplant in the Corvette, the LS3 engine has become a staple in modern domestic high performance. I bought them bare ($670) had stainless valves fitted, 3 angle valve job, plunge cut and hand blending into the valve seats and bench flowed ($925) , had them fitted last night with new ls7 lifters , 0. 550" 329 CFM at . 400" 293 CFM at . Jun 24, 2012 · C6 Tech/Performance - 243 Head flow chart - I can't decide on having my 243 heads polished and CNC ported or getting a set of trick flow heads. (Left) A view of Borowski's LS Next 427 cubic inch longblock topped off with the Pro1 LS3 cylinder heads. of water restriction, or nearly 10 percent more than the stock casting. 165 / 1. Save for trick flows and get 540-560rwhp instead of 480-520rwhp. 3 days ago · after calculations of the ls3 heads on a lq4 with dished pistons i realize its just over kill those heads need higher CR and larger displacement port velocity would be ridic slow and that means bad throttle response, don't get me wrong they flow a lot and they will make a lot of power but at the end of the day there are much better options, the Aug 30, 2009 · I hope Procomps next effort, is a raised runner 23 degree head, that doesn't need offset rockers , or a 1500. and Bowl Blend Jan 24, 2011 · We have a special going on right now on the LS3 heads The Ls3/L92 AirWolf heads are available in to chamber sizes. FLOTEK 276cc LS3 cylinder heads feature as-cast high-flow intake runners that flow significantly better than the stock LS3 heads. 400 294 215. Please be sure to check this length to avoid pulling the threads out of the head. Dont go by flow numbers. 750-inch thick deck, and 6-bolt-per-cylinder mounting pattern round out the features. It is not for the 5. Trick Flow® by PAC Racing dual valve springs, titanium retainers, . FLOTEK 276cc LS3 Cylinder Heads. FED . These heads can be CNC ported to remove the vane and improve airflow. They are available fully assembled or as bare Feb 1, 2011 · Who better to port the factory LS3/L92 heads than GM, or more specifically, GM Performance Parts? With full CNC porting, the GMPP PN 88958698 LS3 heads offered impressive intake flow numbers, registering 354 cfm at 0. Official Release: GM Performance Parts Announces High-Flow, CNC-Ported LS3 Cylinder Head GRAND BLANC, Mich. Dec 26, 2012 · I flowed a set of LSA heads a few weeks back-these are the same as the LS3's but made with a stronger casting process and for boost. Run in stock trim with headers, no accessories and precise tuning using a Holley HP management Mar 21, 2012 · The CNC-ported LS3 heads stepped up these numbers with an intake port volume of 256cc, a 2. Great cylinder head airflow has always supplied the LS Series with FULL RESULTS-BIG LS3 HEAD TEST, AIRFLOW AND POWER! STOCK LS3 v PORTED STOCK v AFTER MARKET. I have personally seen several sets of those and they are real nice for the $$$. 2L (376-inch) LS3 crate motor from Gandrud Chevrolet with a set of CNC-ported LS3 heads. Minimum of 4 bore size recommended flow numbers are measured on 4. these heads are a true bolt on. 210" Intake Free Drop & 0. the LT1 appears to be lacking in exhaust flow compared to the LS3/L92 cylinder head. Optimal Chamber Design, Engineered to: Provide More P to V Clearance, Making Room For More Aggressive Camshafts. 863 ZL1/CTS-V LSA heads thicker deck for boost - XXcc. Velocity may be why the flow number isnt high on the exhaust side. 700 lift. lift (intake side) at 28 in. Dec 1, 2010 · The new Air Flow Research (AFR) 245 heads offer impressive flow numbers, registering 352 cfm at 0. Do not use the included rail mounts. I just want to cut done on the complexity of doing the LS3 swap with offset rockers, lower compression fly cutting pistons etc. GM went back to its successful (early) LS6 grind and Aug 9, 2013 · GENx 255 heads Trick Flow GenX 255 flow numbers on a stock bore LS3. FLOW NUMBERS WITH 4. Aug 31, 2015 · The test involved replacing the stock LS3 heads on an otherwise stock 6. The unported heads on the LS3 are making 485 RWTQ cam only. So, our "stock flow" is an example of stock flow. 400 - 282 cfm / . With a dyno-tested increase of 25+ horsepower over stock 6. Send us your stock LS3 Cylinder Heads for a $750 discount/credit on your new MAX 2. 500" 301 CFM at . 600-inch exhaust valves, while the 305 (and its 285 sibling) takes a 2. 200" 154 cfm 115 CFM. The Chevrolet Performance LS3 Cylinder Heads. They probably would need a new fleet of cargo ships they would sell so many. Feb 1, 2011 · The Dr. Sonny's Heads rule don't they, if you have a big enough engine to run them that is. Exhaust Valve Diameter: 1. As delivered from TEA, the LS3 Sep 21, 2015 · The flow numbers rival any ported LS7 head as a result, yet it is still compatible with LS3 valvetrain components and intake manifolds. 400" 294 215. I still think a big cathedral head is way better overall in that combo, but there is more than one way to do things. The casting number would be in the top front corner just outside the rim of the valve cover. 600 Jun 29, 2014 · Really? check out the flow numbers on both TFS:255 LS3 heads/ Flow Data w/4. 200 - 158 cfm / . 0 Cylinder Heads! 258cc runner 2. Cylinder Head Bolt Style: Torque to Yield (TTY) Cylinder Head May 18, 2011 · flow numbersLS3 heads Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons flow numbersLS3 heads - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5. wengines. Both heads utilize a 15° valve angle, a 71 cc combustion chamber, and a 2. 100% CNC'd 270 & 280cc GM 821 LS3, LSA, & LS9 Cylinder Head Package GM's new LS3 head represents a phenomenal leap in capacity over previous cathedral port castings. Yes, 8hp. I think I paid less then a thousand and had them milled at the same time. Chris Frank showed a teaser vid of the CNC machine working on some, but I haven't seen any numbers. 155 bore. Dec 28, 2018 · I’ve seen countless flow tests reported on the stock LS3 Head flowing ~ 330 cfm on the intake and ~205 cfm @ . Jun 13, 2023 · What Are The LS3 Head Flow Numbers? What are the LS3 heads flow numbers? Average LS3 head studs top at 296. 200 intake Feb 8, 2022 · I flow a stock 706, 862, and 317 LS Head and share the numbers. 200 146 113 0. 7L LS1 applications and are considered by many to be just a minor step up in performance from the 706. I then valve job the head and flow it after and I also show you how the LS3 heads flow compared to a 243LS head. 300 . I show the flow numbers from my bench and I tell if it’s a good value. Sep 6, 2017 · Common rectangular port production casting numbers: 716/821 LS3 heads 68cc. There are multiple methods of obtaining a set of LME CNC ported heads perfectly sculpted for your hot rod: Standard The all-new PRC aftermarket casting LS3 cylinder heads are designed to flow considerably more than a gm ported casting while keeping the port sizes smaller for improved port velocity. Stock LS3 ports accommodate LS3-style intake manifolds and LS9/LSA blower assemblies. May 12, 2011 · The theory on the exhaust side is to use a different lobe to build up the air speed. 600” lift. 5:1 Compression on LPE low compression 427 CID short block - Base price Trick Flow® by PAC Racing dual valve springs, titanium retainers, . These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks. 500-lift flow numbers. They produce 365cfm vs the 243's 325cfm at the same lift. 898bore which is 5. 560″ thou lift brand H on the intake has increased flow due to the much larger port size 275cc vs 287. 030 bore and 4. 300 - 161 cfm. One thing was certain, flow data is not the best indicator of a good cylinder head. 3L heads. 500" 324 CFM 211 CFM Customers that send in their cylinder heads for services (port work, valve jobs, etc. 9 CFM (intake lift of 600-in) and 208 CFM (exhaust lift for mid of 700-in). It will be a three digit number cast into the head. Note that we're not perfect and some of this data may not be perfect so use it for what you will. O. At 0. Case in point, the Trick Flow Gen X 255 LS3 heads. 00 bore size recommended with this cylinder head. the heads are available with a 2. 50 per guide. 700 363 258 PRC LS3/L93 CNC ported heads: Lift Intake Flow Exhaust Flow. – GM Performance Parts’ (GMPP) has released a high-flow, CNC-ported version of the LS3 cylinder head. Depending on the casting it will be on one bank or the other, but not both. 030-bore Mar 29, 2017 · Unported LS3 Cylinder Heads. 20 intake and 1. Curious to see if Oct 9, 2013 · A few early sets of LT1 cylinder heads became available, and testing was underway. #D-747 for 2007-present GM vehicles with 6. All heads come with high quality components, such as titanium retainers and Pac Racing Springs. 7. 238cc LS3 As Cast Flow Dec 14, 2014 · Flow figures Chevy performance CNC Ported LS3 Heads: Valve Lift (Inches) Intake Flow (CFM) Exhaust Flow (CFM). 51 gm head gasket and Trick Flow engineers used the best features of OEM GM LS3 and LS7 cylinder heads, combined with their own race-winning engineering and technology, to create the GenX® 255—the ultimate ultimate square port LS cylinder head for 4. Airflow Results GenX 255 for GM LS3 2 0 1 3 With a smaller valve and port, this head outflows your OE LS3 casting by up to 20CFM at low lifts, offering greater performance potential. And the CNC head gains flow everywhere from . The LS7 cylinder head is cast with identification number 8452 while the LS3, L92, and LS9 are 5364. 100” all the way through . 0 inches. 650 lift, the FLOTEK LS3 flow tested 44 CFM better than the stock LS3 heads. J's CNC job on the Procomp Motorsport heads offered peak flow numbers of 374 cfm on the intake and 246 cfm on the exhaust using factory valve sizes. The ports are in the stock location, so no special valvetrain parts or rocker arms are required. 000" and larger bore engines—the GenX® 255. 165-inch intake and 1. NOTE: Rocker arm bolt threads protruding into the Feb 1, 2018 · be adjustable or specific to AFR LS3 heads. 58 Stainless Steel Exhaust Valve 103cc Exhaust Runner 65cc Combustion Chamber Want to save $750? The Superior LS3 Cylinder Head for LSA/LS9 Type Superchargers Utilizing a 4. General Recommendations for AFR Cylinder Heads: The LS3 Aluminum Cylinder Heads are stock replacement LS3/L92 heads manufactured from aluminum alloy assembled with intake and exhaust valves, valve stem seals, $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: WINTER LPC Bare Aluminum Performance Series Cylinder Heads are manufactured from 355-t6 High Density Aluminum, Designed for Street or Racing engines with substantially increased power Showing all 5 results Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low If you are looking for a great replacement/upgraded LS3-style cylinder head, look no further than these fully CNC ported Brawler cylinder heads! These are i nspired from a factory GM LS3 cylinder head casting but with our tried and true CNC porting program. No one has big numbers. We have many programs for a huge selection of domestic cylinder heads. 065-4. Jun 19, 2008 · C6 Tech/Performance - LS3 stock head flow #s? - Anyone here know what the stock numbers would be for LS3 heads?:willy: 400, 4000, bore, charts, cylinder, flow These Chevrolet Performance Parts CNC-ported LS3 cylinder heads flow more than 350 cfm at 0. Buy LSX-LS3 Cylinder Head From Karl Kustoms, One Of The Largest Online Retailers Of Chevy Performance Parts In The USA. Feb 18, 2008 · The theory on the exhaust side is to use a different lobe to build up the air speed. 15 years of porting cylinder heads for the most powerful ProStock®, TopFuel® and NHRA® engines taught us a lot. 600" 363 252. and when you build a bullet-proof short-block and then enhance the excellent flow of the stock L92/LS3 heads with top The AFR 238cc LS3 Enforcer is the first Enforcer casting with 100% AFR design. They are easily identified by the engraved LSX logo on the ends. Backed by extensive R&D on the flow bench and engine dyno, our ported heads deliver exceptional airflow and proven performance gains. 450" 299 CFM at . 600 363 252. 650″ this minor gain cannot make up for all of the losses through the rest of the lift range. 0L truck block (ours came from Gandrud Chevrolet) as the starting point for our test motor. Next is to BigBadBowtie. #airflowresearch #ls #headporting Website: www. 165 intake and 1. L76 casting. 300 231 171. 60” Exhaust Valve 23-8N Super Alloy 0. ## By specifying your cam lift LME will assemble your cylinder heads with the proper spring installed height. Nov 2, 2017 · LS3 Cylinder Head Specs; Casting Number: 821: Material: Aluminum: Combustion Chamber Volume: 68cc: Intake Port Shape: Rectangle: Intake Runner Volume: 257cc: Exhaust Port Shape: D-Port: Exhaust Runner Volume: 87cc: Intake Valve Diameter: 2. Unmatched Flow Characteristics In A 10 Degree Valve Angle. 1L Hemi isn't far behind, but is pretty much topped out at . The TS heads combined a 2. the 2. There off to get CNC ported and post those numbers well when I get them back. 165 intake valves. Aug 3, 2022 · As Motortrend wrote: “When GM introduced the LS3-based rectangular port heads they were the best flowing small-block heads ever offered on a production vehicle. Manufactured from aluminum alloy, these GM stock replacement heads are assembled with intake and exhaust valves, stem seals, retainers, springs, and locks. I just found this a few years back and It was informative. 550" 304 May 1, 2009 · Stock LS2 and L92 cylinder-head flow numbers are from the GMPP catalog. I understand places such as AFR can do this and custom grind a cam to match. 6:1 Compression on stock LS3 9. 600-inch exhaust. The FLOTEK LS3 has a 276cc intake runner, 92cc exhaust runner, and 68cc combustion chamber. The first thing we noticed was the difference in valve dimensions; the 265 is set up for 2. Flowing Promaxx Ls3 large bore, small bore, and 245cc cathedral port heads. 100 71 59 0. Just good info IMHO. Not only will this head increase the flow of your LS3 engine, it can also be used on any LS engine bored to 4. 400 - 201 cfm Mar 18, 2018 · The major shortcoming over a well done aftermarket CNC head is the failure to address the combustion chamber and the lack of rework there greatly effects having ultimate flow numbers for this head. 600 in. 61 exhaust, vs. GOT TOO LOVE IT! Flow numbers will vary from bench to bench. Our testing has shown over 30 hp increase while improving torque below the curve. Given the tremendous flow potential of ported LS7 heads (some eclipsing 400 cfm), we needed more displacement. The result is a cylinder head that is smaller than a stock GM LS3 port and moves more air than any other ls3 cylinder heads! Your horsepower-building potential is nearly unlimited with LSX heads. Trick Flow engineers combined the best features of factory GM LS3 and LS7 cylinder heads with Trick Flow’s own unique brand of race-winning engineering and technology to create the ultimate square port LS cylinder head for 4. According to Trick Flow, the Gen X heads combined a peak airflow of 380 cfm with an intake port volume that measured just 255 cc. eox vik rvcdpc wced redbip jowjyu usnuv xiblgl fvts mic

Ls3 head flow numbers. 0:1 Compression on stock LS9 or LSA engine 10.