The L98 is a modified version of the L76 with the AFM hardware removed. The L98 still retains a capacity of 6.0 litres, as well as the high-flowing rectangular port cylinder heads from the LS3/L76. Thanks to a slightly more aggressive cam profile than the L76, the L98 produces 270kW.
| Pontiac G8 |
|---|
| Engine | 3.6 L LY7 V6 (256 hp) 6.0 L L76 V8 (361 hp) 6.2 L LS3 V8 (415 hp) |
| Transmission | 5-speed 5L40-E automatic 6-speed 6L80-E automatic 6-speed Tremec TR-6060 manual |
| Dimensions |
| Wheelbase | 114.7 in (2,913 mm) |
The LS2 (VIN code U) replaced the LS1 in the Corvette in 2005. It used the new Gen. 4 block and the cathedral port heads from the LS6. The LS2 added more ?Displacement? and better heads for more ?Horsepower? and ?Torque? .
Pontiac G8 GTs come with L92 heads. Sometimes owners swap for LS3 heads. I think the 821s are LS3 heads. The heads on the L76 and LS3 are the same except for the hollow stem intake valves.
LS2 engines, due to the larger 4.000-inch bore design, allows it to run LS1, LS6, and LS2 cathedral port heads in addition to the newer rectangular port LS3/L92 heads.
The L77 is an engine produced by General Motors for full-size vehicles. Displacing 6.0 liters in a V8 configuration, the L77 is part of the fourth-generation Small Block engine family and, for all intents and purposes, is the 6.0-liter Vortec L96 engine used in GM's GMT900-based trucks and SUVs.
One of the main differences between the LS1 and the LS2 is in the intake manifold. The LS2 intake is slightly better than the LS1 intake. The LS1 intake is designed for a 5.7L and flows enough air to keep a 350+ horsepower 5.7L happy. The later model LS1 came with an LS2 intake, which improved horsepower.
* 4.8L - The smallest-displacement LS engine (293 cu in); it uses an iron block with 3.78-inch bores and aluminum heads.
ls2 blocks have DOD provisions.
L98/L76 is the same engine except the L98 has the redundant DOD hardware removed.
As far as the mileage goes, properly maintained cars typically go around 200,000 to 250,000 miles.
The stock 5.3L is factory rated around 320 hp with 340 lb-ft of torque.
Chevy used to have a 327 which was the 5.4L engine. Now they call it the 5.3L engine so it is the old 327 down sized slightly to a 323.
Best LS Engines
- LS9/LSA: Made for the 2009-2013 Corvette ZR1, the LS9 is a supercharged 6.2L engine rated at 638 horsepower — the most powerful of all small blocks.
- LS1: This is the one that started it all!
- LS7: Introduced in 2005, the LS7 sported 427 cubic inches, making it the largest small block ever.
L31 (2002)From a purely technical standpoint, the most recent version of the Chevy 350 would naturally be the best of the bunch. Marketed as the “Vortec 5700” engine, but known internally by the moniker of L31, this engine was used primarily in GM vans and trucks until 2002.
The 6.0L block—used in the LQ4, LQ9, and LY6—is the most popular with hot rodders. It features a 4.000-inch bore and can be purchased brand new for $800. It can safely accommodate a 4.030-inch bore and is good for 421 ci when matched with a 4.125-inch stroke.
The Vortec truck harness has a large portion up on top of the intake manifold, is supported by it, and is covered or hidden by the plastic engine cover. The LS engine harness is configured much differently and the intake manifold is exposed and uses valve covers to dress up the engine.
