It was first introduced in 1999 and was used for both light and commercial duty applications until it was discontinued in 2006, making way for the new generation of engines from GM's LS range. lift cams are popular, but LS6 springs allow you to run .550-in. It was actually the 8th digit of the vehicle identification number. The799 and 243 casting Cathedral-port cylinder heads can be CNC ported to flow close to the aftermarket heads. Are the 799 heads on LS1 interchangeable? The 706 heads were simply better than the 799 heads through most of the curve. Sometimes referred to as the LS6, the LQ4 is a 6.0 litre member of General Motors' Vortec engine family. If you are looking for a LS-series engine to build, the Vortec-series 5.3L is arguably the best choice for the dollar. With the porting process completed, flow numbers have been measured as high as 373 cfm at .Oct 3, 2019 This impressive number is achieved with careful machining of the intake ports and exhaust ports which improves air velocity through both systems. In fact, they can make more power than a LS6 or LS2 with boost due to the thick cylinder walls. These cylinder heads were originally designed for various models of Chevy vehicles and are compatible with LM7, LR4, and LM4 5.3 engines. REMEMBER--just because the heads say '243' doesn't mean it has the lighter weight valves and upgraded valvetrain like the 243 heads that were on the Z06 Corvette. Both heads had 2691 Show more Show more It's. Bore 3 = 2.307 in. The cylinder head of a vehicle is a great component playing a significant role in the superior performance of the engine. A larger port volume results in more power, decreasing fuel economy. The smaller intake valve is the reason many LS owners dismiss the 706 heads, but enthusiasts should really look at something called the Coefficient of Discharge. Heres a table with common performancerotating assembly combinations. Condition: Remanufactured - Exceeds OEM Specifications. open. Is It a 4.8L or a 5.3L Engine?Spotters Guide. The Evolution of the Vortec Truck Engine - Lowbuck LS NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades. Depending on how much power you intend to make, upgrading to largerfuel injectorsmay be needed. 2004 torrid red with red interior A4 GTO (1 of 499) TR-230/236 cam/TEA ported Trick Flow 215 heads/4" CAI/100mm MAF/ported FAST 90/Kooks/Magnaflow. Not surprisingly, the 706 truck heads offered both the smallest port and chamber volumes. These powerful engines could be found not only in Corvettes but also trucks and SUVs such as the truck-spec LQ9 and LQ4 that had 6 cubic centimeters larger combustion chambers. The 243/799 heads came on the 5.3 "L33 HO" motor in 05. [] LC9 5.3L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More []. It is responsible for removing the spent gases from the cylinders. The aluminum blocks have Siamese bores with sleeves that are bonded to the block, and other enhancements, making them durable for boosted power. The 5.3L engine is reliable and incredibly versatile, making it a great choice for anyone looking for a powerful yet economical engine option in their vehicle. Since inception, the 799 heads have offered superior performance and efficiency on the 4.8 and 5.3-liter truck engines. Drop-in .500-in. I would like to keep it as budget friendly as possible, and make around 500-600 whp. This engine WILL be supercharged so the LQ9 looks best but so much harder to find trying to do research on supercharging a L92 is hard to find info on. There is a .550 lift version of the SUM-8712 coming soon called the SUM-8719. Starting with an aluminum Gen IV block, Bush added CNC 243 heads, a stock GM LSA forged crankshaft, and some Wiseco flattops with 9.5:1 compression and Scat H-beam 6.125-inch rods. It is an aluminum block. The shape is designed to increase airflow and power. When running boost, you can use a water-methanol system to supply extra fuel and lower charge air temps. The 799 head cc is pretty smaller compared to some others. LC9 5.3L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam I have a 2012 silverado 1500 crew cab. Like most auto parts, cylinder heads can eventually crack or fail for various reasons. 799 Heads - Everything You Should Know - Rx Mechanic
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