Is the LH6 an LS engine?
The LH6 engine is a 5.3L Gen. IV LS truck engine and offered Active Fuel Management (AFM). The LH6 was available in mid-size SUVs until 2009, and in GM pickups from 2007-09. For marketing purposes, it was also known as the Vortec 5300.
Does LH6 have DOD?
Nevertheless, GM Powertrain has designed tuned engine mounts for multiphase engine operation. That vehicle is not slated for DOD, although it will have the new LH6 engine (minus DOD).
Does the LH6 have VVT?
302-315 hp. 330-338 ft./lbs….LS Family: Gen. 4, 5.3L, Aluminum Block, Truck Engines.
| Camshaft Specifications | ||
|---|---|---|
| Years | 2005-06 | 2007-09 |
| Cam Gear Poles | 1X | 4X |
| Active Fuel Management (AFM) | Yes | |
| Variable Valve Timing (VVT) | No |
How much HP can a 5.3 LS make?
The stock 5.3L is factory rated around 320 hp with 340 lb-ft of torque. When on the dyno at Westech we were able to get close to the stock numbers 315 hp and 325 lb-ft with our 650 Holley carburetor swap, MSD controller, and Edelbrock intake.
What are LS 243 heads?
Generation III cylinder head for V8 truck, van, SUV and perfomance applications often called an LS6 head. It has cathedral shaped intake ports and D shaped exhaust. The combustion chamber is slightly smaller and more efficient than the earlier heads used on LS1 engines.
How much power can a LH6 handle?
The LH6 cranks were cast but strong. They’ve been known to handle over 1000 whp. The main reason for going with a stroker forged crank is for the added cubic inches. The extra cubes bring boost on quicker which means you can use bigger turbos.
What is the difference between LC9 and LMG?
The LMG Vortec 5300 is the flex fuel version of the LY5. Power and torque ratings for SUV and pickup truck applications are the same as each application’s LY5 rating. The LC9 Vortec 5300 is the Flex-Fuel version of the LH6, and is found in 4WD models.
What is the best LS motor to swap?
If you’re planning on boosting your project the 4.8L truck engine will be perfect for you. The 4.8L can take insane amounts of boost completely stock and will really perform well. If you don’t want a barebones 5.3L or 4.8L you could always step up to a 6.2L truck block which is based on the LS3 engine.
Are 5.3 and 6.0 heads the same?
You’ll lose compression if you use cathedral port 6.0 heads on your 5.3. The chamber is larger. The rectangular ports should not be used on your engine. LS6/T56 swap is complete and I’m just enjoying the time behind the wheel.
What did GM 243 heads come on?
The 243 head came on the more powerful LS6 engine from 2001 to 2006, and was used in C5 Corvettes. Later engines like the truck-spec LQ9 and LQ4 used the exact same port design as the LS6’s 243 heads, but had 6 cc larger combustion chambers.
Are 5.3 LS Motors?
The cheapest of the LS engine family is the 5.3L truck engine since it came in most of the trucks and SUVs that Chevrolet has produced.
When did General Motors start making the LH6?
Our LH6 5.3 liter Vortec Long Block Crate Engine is on sale. General Motors started production on this V8 small block in 2005. This engine utilized DOD (displacement on demand) to increase fuel efficiency and unlike previous models the LH6 featured an aluminum block.
How big is the bore of the LH6 engine?
There are tons of performance parts available, and most will bolt right on. Below are some upgrades that will improve the performance of the LH6, LC9, LH8, and LH9 engines. The engines share a 3.780 in. bore diameter.
What should I do with my LH6 5.3L engine?
The 5.3L loves to rev, so raising the rev limit and shift points is common. It also makes it easier to tune with a bigger cam and injectors later on. Before you go, make sure to install a colder thermostat to open up the tuning window. Below are more upgrades that will improve the performance of the LH6 engines.
Are there roller rockers on the LH6 engine?
The stock rockers are pedestal mounted. High spring pressure (over 475 lbs.) can pull the bolts out of the cylinder head. Converting to roller rockers is recommended for cams over 0.600 in. lift. The LH6 and LC9 are equipped with Active Fuel Management (AFM). It’s good for gas mileage, but not for performance.