The easiest way to differentiate them is to inspect the piston top. Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production Heads, cam, intake and injectors are the same. So you can see how a flat and parallel deck surface affects several engine performance areas, especially when pushing piston-to-head clearance to the minimum in order to maximize compression. Part Number . The ONLY part difference between the LQ4 and LQ9 is the piston (LQ4's have dished pistons to run regular gas). Compression Height: How-To-Use: . Which LS engine do I have? The engine produced from 273 PS (201 kW; 270 HP) to 299 PS (220 kW . ptc torque converter - 9. LQ9 has a flattop piston and the lq4 piston has a small dish to it. Bore Spacing: 4.400 in. . NOTE: Not compatible with production-style LS connecting rods. The LM7 has a sequential multi-port fuel injection system and 78.0 mm (3.07 in) throttle body. The compression ratio of the engine is one of three key factors in determining the engine's cylinder pressure. Compression is a volume . (97) . PowerPak Plus offers additional features that include forged 2618 alloy and a hard anodized top ring groove . The piston is the ONLY difference between a LQ4 and a LQ9. Here's a diy video or just have a machine shop do it for you. Quote. Later Gen IV supercharged engines like the LSA and LS9 use dished pistons to reduce the static compression ratio. Not much of a change at all. Piston Volume: 0cc. 45. Piston Material: Hypereutectic Cast Aluminum Alloy. 1.090 Compression Height; 3.400 Stroke; 5.400 Rod Length.912 Wrist Pin; 52100 Bearing Steel Wrist Pins.1.2 1.2 3.0 Ring Grooves; Top or Lateral Gas Ports; The relationship between connecting rod length, piston compression height and compression ratio is often misunderstood, largely due to the misuse of the term "compression." In all honesty it probably shouldn't be applied to piston terminology at all except as it relates to the volume of the piston crown surface. Price Considerations: The LQ9 being a limited production engine often comes with about a $1000 premium over a similar age . It will be stock cubes and I will be putting forged rods and pistons in it. And it has a torque rating of 380ft./lbs. The bore diameter is 4 inches, and the stroke is 3.622 inches. Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production ; 0.31-0.52 mm. I am using 243 64cc heads from a 01 Z06 vette in place of the 317 and the LS6 intake. Bore (in.) MAHLE Flat Top Piston made by MAHLE, for as low as $747.35. Find Pistons 4.030 in. It features high-compression (10:1) flat-top pistons for an extra 10 hp (7.5 kW) and 10 ftlbf (14 Nm), bringing output to 345 hp (257 kW) and 380 ftlb (515 Nm). Find CHEVROLET 6.0L/364 Pistons & Piston Rings and get Free Shipping on Orders Over $99 at Summit Racing! The value will be returned in CR, Compression Ratio from ALL input values excluding Total Volume. The engine produced from 273 PS (201 kW; 270 HP) to 299 PS (220 kW . Cypress, CA 90630 . The RPM range will only be effected by the cam. Compression Height . . Main Cap Style: . Compression ratio rating is 9.5:1. 4.185" bore, .866" wrist pin size. The LQ4, generally speaking, is a cheaper engine. Thrust Bearing Location #3 Main. The piston of the LQ9 engine is flat-topped with a smooth surface. . Just a sneaky way to make a little more power, since flat tops promote better flame travel and that was something they didn't want to sacrafice with a pop up piston. It will end up just like the gen 3 pressed rod/piston. Chevrolet. Number of Cylinders: 8 Bore: 4.0" Stroke: 3.622" Compression Ratio: 10.5:1 Connecting Rod Length: 6.098" Intake Manifold Type: Holley 2X4 dual plane or stock LS6. For its performance specifications, its compression ratio is 10.1:1. 8.206, 9.503, 9.206: in: Piston Diameter at Top Ring Land - usually runs 0.003" to 0.005" less than bore diameter: in: Distance from Top of Piston to Ring Land - may vary from manufacturer to manufacturer: in: Total Valve Relief Volume - usually 4.6cc . Engine Preset Bore Diameter Stroke Length Chamber Volume Piston Dome/Dish Volume Deck Clearance Gasket Thickness Gasket Bore Cylinders Calculate Compression Ratio - Total Displacement The compression height is the distance from the center of the pin hole to the deck of the piston. Select a Sub-Category. Give it a try and see what happens. Cylinder Blocks 1.561 in. 23 Small Block Chevy. 3L produced 357hp at 5,300 rpm and 383 lb-ft of torque at 4,200 rpm Rebuild Service Gm 862 243 706 799 Cylinder Heads Lsx Ls1 Ls2 Head Rebuilding Ls Here is a list of a few casting #'s: 853 97-00 aluminum 5 650 Springs 2 0-liter truck engines in two variations: "873" cast iron (1999-2000) and "317" aluminum (2001+) 0-liter truck engines in two variations: "873" cast . . Jan 17, 2012. For pistons ABOVE the block @ TDC - value in box must be a NEGATIVE number (-.000) DOME piston - value in box must be a NEGATIVE number (-0.0) DISH piston - value in box must be a POSITIVE number (0.0) 10800 VALLEY VIEW STREET . This allowed 11:1 compression with a flat top piston and a 67cc head. A dished piston makes it a LQ4 engine while the LQ9 uses a flat top piston. Proseal rings and other accessories are also available to complete your rebuild. Piston Volume +6.7cc. You can use gen 4 floating pistons on gen 3 pressed piston/Rod but you can't go the other way. Deck Height: 9.230-9.240 in. Piston Features: 3D milling on piston crowns for ready to install finish Inboard forging design for maximum strength Valve pockets designed to work with most aftermarket 21-23. . Compression Height - distance from CL of wrist pin to top of piston: in: Deck Height - e.g. Main Cap Style: . Block Specs: Much like the LQ4, the LQ9's block material is also iron. The LQ9 engine forms part of the third generation of the LS family. 0.0122-0.023 in. Only show this user. Stroke, 6.125 .927 Rod, NA/Boost/Nitrous, Cathedral/Rect. The LQ9 has 10.1 compression and the LQ4 has 9.41:1 compression stock. Information : Piston Type : Standard Size; Flat Top-No Valve Relief, Coated Skirt; Floating Pin Enter the measurement designation in either inches, 1, or millimeters, 2. height is 6.07 . Also the LQ9's compression ratio depends on what cylinder heads are used. The LQ4 piston is dished where as the LQ9 is a flat-top increasing compression to 10:1, and HP to 345 factory. 0.012-0.02 in. The other two are the duration of the camshaft (at .050" lifter rise) and the position of the cam in the engine (advanced or retarded). Our LQ4 pistons have a very slight dish and hence a touch less compression. Piston Features: Designed for use with Brodix SR20 and Dart 20 cylinder heads Vertical gas ports for maximum . Piston Material: Hypereutectic Cast Aluminum Alloy. 035 11:1 Compression, Pac 1218 Springs, Yank PT3200 Stall, Comp Cam 220/224, 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 Engine displacement is often measured in liters, cubic centimeters, or cubic inches 3L heads (casting numbers 706, 852, or 895 The 317 heads . There is a benefit to owning a LQ4 over the LQ9. Must be used only with new LSX connecting . . peace. Bore Spacing: 4.400 in. LQ9 has flat pistons, hence the comp difference and were in escalades and silverado SS trucks. . Lightweight, includes rings and wrist pins. . LQ9 block- The lock material used for the LQ9 is iron. 2cc Flat, Std. The LQ9 has 10.1 compression and the LQ4 has 9.41:1 compression stock. Posted June 7, 2012. Our LS stroker kits are all forged giving you the reliability and performance you can count on. Intro to the LQ4 and LQ9 ; I know my VIN. Piston Rings. My lq4 (same block lower compression) made 407rwhp and 380rwtq with a cam and bolt ons . As a result, the stock horsepower also increases. However, the LS3 had a 4 550 65 cc Cathedral 706 / 862 / 895 LM4 / LM7 / LR4 1 0 aluminum heads Even more info: Casting Number 241 Head: 1997+ LS1 5 The LS3 heads will fit on any LS block with a minimum 4 Same Info applies to the: 4 Same Info applies to the: 4. The LQ9 is tuned for more performance with the bump in compression. 0.0122-0.023 in. Feb 5, 2014. Meet the weapon of choice for big boost 035 11:1 Compression, Pac 1218 Springs, Yank PT3200 Stall, Comp Cam 220/224, Chevrolet gm gen iii 5 LS1 and LS6 blocks will only accept LS1, LS2 and LS6 heads; LS2 blocks can use LS1, LS2, LS3, LS6, LS9 and L92 heads Looks like the P0777 is from the tcm, so that should be the only one you are concerned with Looks like the . Transmission Type: Manual Overall Tire Height: 26.1 Torque Converter Stall Speed: N/A ENGINE INFORMATION Engine Block Type: Chevrolet Engine Family: LS 6.0 LQ9 2004 Engine Size: 364 c.i. This being if you want to go with some sort of forced induction, such as a turbocharger or a supercharger . Lunati 4340 forged steel crankshaft 4.000 stroke. 1.304 in. Short tracks frequently enforce a 9:1 rule while NASCAR engines are limited to 12:1. . Thrust Bearing Location #3 Main. Search: Lq4 With 706 Heads. 6.0L LY6 LQ4 LQ9, Set of 8. 23 Competition Series. Gen IV engines (and the Gen III LQ9) used a so-called full floating pin that rotated freely in both the piston and rod (and was held in place via locking rings set in the piston at either end of the pin bore). Deck Height: 9.230-9.240 in. It has a bore diameter of 4 inches and a stroke of 3.62 inches. Factory camshaft part numbers The 99-00 LQ4 6.0L used the 12560967 - this is also used in the 5.3L The 01-up LQ4 6.0L used the 12561721 The 02-up LQ9 6.0L also used the 12561721 Factory Camshaft specs are: 12560967 191/190 duration at .050 0.457/0.466 lift on a 114 Lobe center Here's a diy video or just have a machine shop do it for you. The LQ4, generally speaking, is a cheaper engine. I think I mixed it up saying thicker and not thinner. Kit Fits GEN III 6.0L Vortec 6000, LQ4 LQ9, GEN IV 6.0L LS2 L76 L98 L77 LY6 L96. Apr 15, 2010 #4 1. . Which LS engine do I have? Here is a basic and simple guideline I use at my shop. All to often pistons are bought mail order or at a swap meet based on an advertised compression ratio. Search: Lq4 With 706 Heads. 1970camaroRS . I already have a fuel system capable support my 600 rwhp goal on e85. For marketing purposes, it was also known as the Vortec HO 6000 or VortecMAX. Diamond Racing Pistons -23 Small Block Chevy. . This design increases the compression ratio compared to that of its predecessor, LQ4. Shop the Best selection of SRP Pistons, Forged Pistons, Flat Top Pistons, Dome Pistons. You can also calculate Total Volume from bore, stroke, and CR. (116) 1.165 in. When cylinder head and chamber size are dictated, piston configuration, deck height, and gasket thickness must be juggled to chase the compression ratio requirement. The result of how these three factors interact with one another is the amount of cylinder pressure . The LQ9 horsepower rating is 345 hp, and the torque rating is 380 ft/lb. Only show this user. This LS rotating assembly kit is designed to support up to 1400 horsepower with pin upgrade. Search: Lq4 With 706 Heads. LQs are 6.0L Gen III motors. 1.2mm compression ring lands and a 2.0mm oil control ring land. Compression Height (in.) Pin, Chevy, LS, Set of 8. View. Part Number: SUM-2999274030-2. There is a benefit to owning a LQ4 over the LQ9. Compression Ratio Calculator To enter a piston dome/dish volume, use a positive number for dome and a negative for dish. The LQ4 piston is a dished piston, whereas the LQ9 piston is a flat-top piston, raising compression to 10:1 and horsepower to 345 from the factory with the LQ4 piston. Click on Calculate Displacement. The LQ4 had the dished pistons and the LQ9 had the flat tops for a bit more compression. The stock heads on both are generally 317s and I think they are 72cc. Flow numbers can be as high as 325 cfm at .600 lift. 0.012-0.02 in. Apr 16, 2010 #5 V. . Apr 15, 2010 #4 1. I just have no idea what cam would need to be used so that the pistons don't have to be fly cut. More Details . Cylinder bore and piston stroke are 96.0 mm (3.78 in) and 92.0 mm (3.62 in), respectively. Upgrading LQ4/LQ9 Cylinder Heads The stock heads can be CNC ported for more airflow and milled up to .030 in. Part Number: SUM-2999274030-2. The information listed here is for the stock engine. As long as the piston structure is designed for the boost or nitrous and the rings are low enough to stay away from the heat and abuse you should be good. LSX454 Piston, 4.185" bore. Application Information A SAMPLE BUILD: AN LS ENGINE WITH . LQ9 Engine Performance Specifications 2. Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service ; 0.31-0.59 mm. I got a line on a complete LQ9 out of a Escalade and I am planning on using the crank, block and heads for my TVS 1900 build. They have a floating Pin. Compression on this particular 540 engine also improved from its previous 9 . Piston Rings. The LQ9 used a flat-top piston, which is why the 10:1 compression is a bit higher than an LQ4. 5.0 out of 5 stars . All volumes are entered in cubic centimeters. The LQ4 PCM tune is severley detuned when compared to the LQ9 tune. Piston Features: 3D milling on piston crowns for ready to install finish Designed to work with most aftermarket 18 cylinder heads Top ring down dimension: .205"-.330". The 10-10.5 compression LS1, LS2 & LS6 I feel comfortable with 11-13 PSI on forged pistons and 9-10 PSI with stock pistons. The main difference between a LQ4 6.0L and the more desirable LQ9 is the LQ9 has a high static compression ratio. Flat top piston type; 1.55 compression height; 4032 forged aluminum; CARB Warning. Due to such a compression ratio, LQ9 has a higher horsepower rating which is 345 hp. Lightweight hollow stem LS3 valves can be cut to 2.000 in. A dished piston was used with lower compression LQ4 engines while higher compression LQ9 employed a flat top. The LM7 has a sequential multi-port fuel injection system and 78.0 mm (3.07 in) throttle body. 5.0 out of 5 stars . The LQ4 is a pressed pin piston setup. Item Description : New OEM GM, LQ9; LS2; LY6 , 6.0L ; V-8 Engine; 2002-2008. The engine used a "Coil-Near-Plugs" ignition system. for more compression. Compression Height, 0.927 in. LQ4 & LQ9 are the same cranks. (as well as your ability to find a piston whose compression height will match up with a stock-length rod and stroker crank). The weaker LQ4 rodsa nd bolts are still good beyond 450 hp. Part# 88894241 Manufacture : OEM; GM. Between the light valves and better springs, the engines will pull cleanly to 7000 rpm. The Vortec 6000 came in two specifications, with the LQ4 making 300hp to 360hp (220-268kW) and the LQ9 making 345hp (257kW) Introduced in January 1995, it is a "clean sheet" design with only rod bearings, lifters, and bore spacing in common with the longstanding Chevrolet small-block V-8 that preceded it as the basis for GM small-block V-8s . Stock pistons fly-cut for valve clearance 23X/24X @ 110 LSA (very close to the one you posted) w/ .624 lift The guy's motor who I copied has ran a best of 9.9X with the norm being 10.0-10.2 @ 29XX race weight. . Piston deck height also has a critical impact on piston-to-head clearance. 2cc Flat, Std. (113) 1.125 in. to fit the seats. So the answer is that the piston compression height should be 1.125 inches. Yes the LQ9 piston Is the same flat top piston used in the LS2. In 2010, the LC9 gained VVT as well as pistons with valve reliefs, and compression dropped from 9 2L is equipped with high-flow cylinder heads based on those developed for the high-performance LS2 and LS6 car V-8s ls6 intake and you have a bit better flowing heads than the vette 3L displacement is the most common LS engine on the planet and . It will end up just like the gen 3 pressed rod/piston. So, it is possible to build an engine with 12.5:1 pistons but in reality have only 8 or 9:1 compression ratio due to a shorter piston compression height. Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production ; 0.31-0.52 mm. Compression ratio rating is 9.5:1. Best deals on SRP Pistons at CNC-Motorsports The store will not work correctly in the case when cookies are disabled. (105) 1.090 in. LS9 - OEM forged pistons: Piston Compression Height: LS1 - 1.340: Piston Ring Package: 1.5mm, 1.5mm, 3.0mm, except . Also you compression ratio probably increased because of the bigger bore of the LQ9, and also because the piston has a different deck height, that contributed to your valves smacking against the pistons. JE Pistons leads the industry in the manufacture of quality forged pistons for the domestic automotive, sport compact, powersports and racing markets. The LQ9 is a limited production engine that is extremely sought due to the fact that it is the HO 6.0L and comes at a . Stroker . Apr 16, 2010 #5 V. . The 6.0L LQ4 and LQ9 are iron blocks, only difference between them is compression ration. The LQ4's were rated at 300hp-325 hp with 360-370 lb/ft torque while the VHO, SS, Escalade LQ9 is 345 hp and 380 lb/ft torque. LQ4 has dished pistons and were in trucks of all sorts. You can use either crank and alot of times they dont need to be balanced, but personally with an aftermarket piston I would have it checked and rebalanced if needed. The engine used a "Coil-Near-Plugs" ignition system. I always look at the 3.75 stroke and 6" rod safe for any power adder application. . Enter the piston stroke length. LQ9 + L92 heads + mild cam = 500hp and 450ish torque. The heads are the 317 for both motors. More Details . Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service ; 0.31-0.59 mm. That will put the top of the piston exactly at the top of the engine block, which is usually best for quench and. Posted by OnAllCylinders Staff on February 2, 2018 at 9:52 am The LQ9 is a 6.0L Gen. 3 small block engine used in GM trucks between 2002 and 2007. To calculate the compression height, please use the following formula: To mate with the 9.240-inch block deck height, rod length would be 6.125 inches and piston compression height would be 1.115 inches. Free shipping when your order includes this part. is to pull all the spark plugs and do a good old-fashioned compression test and see what the pressure is on the gauge; this is a total WAG on my part but I would expect the LQ9 to build about 175-psi and the LQ4 to build about 150 . A better option would be to get a set of gen 4 rods to go with the pistons. and get Free Shipping on Orders Over $99 at Summit Racing! Intro to the LQ4 and LQ9 ; I don't know the VIN. Enter the cylinder bore diameter. Compression 64cc = 10.5 : 1: Sold in Quantity: This is a set of Brand New Genuine Factory OEM GM Standard Size "Flat Top" "Floating" Pistons Contents : 8 pcs Floating Style Flat Top , with No Valve Reliefs.
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