The New Generation

Power Curves
The power numbers listed here are only a fraction of all the different power levels. We've chosen to illustrate the range by showing early numbers followed by the most recent '04 power levels. Note for example that the '04 Corvette LS1 now makes almost 15 percent more horsepower than it did in the '98 Camaro.

By the Numbers
Liters	Cubic Inches	Bore/Stroke	Comp. Ratio	Rod Length	Int. Valve	Exh Valve
4.8	293	3.780/3.268	9.5	6.276	1.890	1.551
5.3	325	3.780/3.622	9.5	6.098	1.890	1.551
5.7	346	3.898/3.622	9.5	6.098	2.000	1.551
5.7	346	3.898/3.622	10.1	6.098	2.000	1.551
6.0	364	4.000/3.622	9.4	6.098	2.000	1.551
6.0	364	4.000/3.622	10.0	6.098	2.000	1.551


Engine	Horsepower	Torque	Application
LR4-4.8L	255 @ 5,200	285 @ 4,000	'99 Truck
	270 @ 5,200	285 @ 4,000
	285 @ 5,200	295 @ 4,000	'04 Truck
LM7-5.3L	265 @ 5,000	320 @ 4,000	'99 Truck
	285 @ 5,200	325 @ 4,000
	295 @ 5,200	330 @ 4,000	'04 Truck
SSR-5.3L	300 @ 5,200	330 @ 4,000	SSR Pickup
LS1-5.7	305 @ 5,200	335 @ 4,000	'98-'99 Camaro
	350 @ 5,200	375 @ 4,000*	'04 Corvette
LS6-5.7L	385 @ 6,000	385 @ 4,800	'01 Corvette
	400 @ 6,000	400 @ 4,800	'04 Corvette
LQ4-6.0LL	300 @ 4,800	360 @ 4,000	''01 Truck
	325 @ 4,400	365 @ 4,000	'04 Truck
LQ9-6.0L	345 @ 5,200	380 @ 4,000	'04 SS Truck

There are at least four oil pans for the Gen III engine. The best pan is the Camaro style (right). The Corvette pan employs those kick-out wings (center), while the truck pan (left) is the deepest and would need to be modified for ground clearance. There's also a fourth pan used on the 5.3L engine used in the SSR truck that is easily identified by its large horizontal hole through the pan.	There are several intake manifolds with the big change between the truck manifolds (left) and the Corvette/Camaro version (right). The best factory intake is the LS6 that is reportedly worth around 10 hp over the LS1.
Even the balancers are different. The Corvette is the shallowest with the F-car slightly deeper, while the truck units push the beltdrive out the farthest from the front of the engine.	The new GTO LS1 engine uses yet a different pan with a front sump design that might be useful in certain engine-swap applications.

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