LQ4. These heads came on low-performance 6.0-liter truck engines in two variations: “873” cast iron (1999–2000) and “317” aluminum (2001+). The early design was the only castiron LS head ever made, and the least desirable in a performance application.
What LS came with 823 heads?
823 heads are the l92 or ls3 heads.
What heads come on a LQ4?
The LQ4 offered a static compression ratio of 9.4:1 thanks to a combination of the 317 heads and dished factory pistons. The 317 heads featured 71-72 cc chambers and intake ports said to be modeled after the LS2/LS6 243 heads.
What LS engine has 243 heads?
The 243 heads came on the LS6 engine produced from 2001 to 2006. It was typically found in the C5 Corvette, but it was eventually ported to the LQ4 and LQ9 to meet truck specs.
What LS engine has 706 heads?
The LS 706 Heads wound up on different models of the Chevy family and fit with the high-performing LM7, LR4, and LM4 5.3 engines. The engine specialists have remanufactured these high-geared cylinder heads at a much more affordable cost and make them the best-performing, cathedral-port factory heads out in the market.
26 related questions foundWhat are 799 heads?
799 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 of the 2004 LS2 cylinder heads due to the triangle casting marks similarity.
What heads on LS3?
The LS3 821 heads had hollow-stem valves, as did the LSA supercharged engine with the 863 heads. Heads for the LS9 used titanium intake valves like the LS7. The main difference between and LSA and LS9 head are the valves. The LSA heads also used a stronger rotocast A356-T6 alloy.
What heads do LS1?
The 241 and 243 heads -- or LS1 and LS6, respectively -- are perfect examples of this modular approach; which head you chose depends on your budget and designs for power and future modifications.
What are 862 heads?
Made of Aluminum, 862 heads are lightweight and they dissipate heat more efficiently. They provide better fuel economy and are often used in high-performance and race cars. Weight saving and rapid engine cooling are the other best features of casting 862 heads.
How much horsepower can a stock 6.0 LS handle?
If we were to run the 6.0L in stock trim, the resulting power output would be around 400 hp (on this dyno the way we test). If we apply 14.5 psi from our turbos to the stock 400hp engine, we might get 800 hp.
Is a 6.0 LS A LS2?
The 6.0 liter V8 LS2 engine was produced by General Motors for use in performance vehicles and sports cars. It is part of GM's Gen IV Small Block engine family and was first introduced in the 2005 Chevrolet Corvette C6, Chevrolet SSR and the Pontiac GTO.
How much HP does a 6.0 LS have?
The 6.0-liter LS engine produces 300 horsepower at 4,400 rpm and 360 pound-feet of torque at 4,400 rpm. It has a maximum engine speed of 5,600 rpm.
Are 799 heads good?
The 799 heads offered the most flow, bettering the 706 heads by as much as 20 cfm at some lift points. The chamber volume on the 799 heads was within 2.5 cc's of the 706 heads, but the dyno indicated this did not translate into power on our test engine.
Are 799 heads Cathedral Port?
Essentially a 243 head with different casting numbers, the 799/243 heads are considered to be the top of the line, factory, cathedral-port offerings. Tested on a flow bench, the 799 head offered right at 249 cfm at . 700 lift on the intake and 191 cfm on the exhaust.
Which heads are better 706 vs 862?
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.
What are good LS heads?
The LS6 was designed specifically by GM to surpass the LS1 as the best performance head, and it did such a good job that the “243” casting was recycled on the LS2. Aside from the LQ9, which is a copy of the LS6, these are the best performing of the OEM cathedral ports.
What LS heads are cathedral Port?
Cathedral port heads came on the original (Gen III) LS1, but were also used on the performance-oriented LS2 and LS6 versions. Cathedral port heads were bolted on literally millions of truck variants, which included (among others) the 4.8L LR4, the 5.3L LM7, and 6.0L LQ4.
How much hp do ported heads add?
How much HP does a port and polish give you? Head porting is probably the single most critical piece of adding HP. you can gain 20-30 from a really good port job.
What LS comes with 862 heads?
862 cylinder heads are included with the 5.3L engines. Cylinder heads are cast in the same way that 706 heads are. The 862 heads have 200cc intake runners, a 1.890/1.550 in.
What are 241 heads?
The 241 head is a stock ls1 head it was on the f bodys and also on the ls1 vettes. They were produced between 2000 and 2003. they are the same as the 853, the 853 was made from 1997 to 2000.
Are 799 LS heads the same as 243?
They're the same...but in factory form the 243 came on LS6 motors with sodium filled vavles and better springs. early LS2's had either 799's or 243's or a 799 on 1 side and a 243 on the other!
How much hp does a cammed 6.0 make?
See all 18 photos After installation of the TrackMax cam, the power output of the 6.0L LY6 jumped from 443 hp and 467 lb-ft of torque to 514 hp at 5,900 rpm and 493 lb-ft of torque at 4,600 rpm.
