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Old 11-08-2004, 11:26 AM   #1
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Default 6.0 vs. 6.0 HO motor differences?

What exactly are the differences in these two motors in the trucks?
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Old 11-08-2004, 11:45 AM   #2
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Compression, and the tune. The LQ4 or normal 6.0 has less compression than the LQ9 or HO 6.0's 10:1 compression. LQ9 uses different pistons to accomplish this.
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Old 11-08-2004, 11:45 AM   #3
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I'm pretty sure it's just the flat-top pistons and 10:0 compression in the LQ9's...

(LQ4 = dished pistons, and 9.4 or 9.6:1)
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Old 11-08-2004, 11:54 AM   #4
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so what are the 04' lq4 (lower compression) motors rated at for HP and TQ?
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Old 11-08-2004, 12:05 PM   #5
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I think like, 300/360?
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Old 11-08-2004, 06:43 PM   #6
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This is from a while ago but had some LQ9 info (6.0 HO).

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I went to the GM web sites and got this info. These are options on these trucks and it is interesting. Check out the all alunium 5.3 in the SSR

2004 Yukon Denali XL
Engine, Vortec 6000 V8 SFI, (325 HP [242.1 kW] @ 5200 rpm, 365 lb.-ft. [492.8 N-m] @ 4000 rpm) (LQ4)

2004 Silverado 2500
Engine, Vortec 6000 V8 SFI, (300 HP [223.8 kW] @ 4400 rpm, 360 lb.-ft. [486.6 N-m] @ 4000 rpm) (LQ4)

2004 Escalade AWD
Engine, Vortec high-output 6000 V8 SFI, (345 HP [257.0 kW] @ 5200 rpm, 380 lb.-ft. [513.0 N-m] @ 4000 rpm) (LQ9)

2004 SSR
Engine, Vortec 5300 V8 SFI, (300 HP [223.7 kW] @ 5200 rpm, 335 lb.-ft. [454.2 N-m] @ 4000 rpm) (LM4)

2004 Silverado 1500
Engine, Vortec 5300 V8 SFI, (295 HP [219.7 kW] @ 5200 rpm, 330 lb.-ft. [445.5 N-m] @ 4000 rpm) (LM7)

2004 Silverado 1500
Engine, Vortec 5300 V8 SFI, Flexible Fuel (295 HP [219.7 kW] @ 5200 rpm, 330 lb.-ft. [445.5 N-m] @ 4000 rpm) (L59)

You can get a brand new LQ9 from GM Performance PartsClick Here For The Link

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Gen III 6.0L V8 Production Engine part # 12499467
What a great engine to re-power your favorite car or truck. This is a quality V-8 Crate Engine "RPO LQ9" with the following features:
345 Horsepower @ 5200 RPM and 380 lb-ft @ 4000 RPM torque
Sequntial fuel injection
Bore is 101.60mm and Stroke is 92.00mm with 10:1 compression ratio
Cast Iron Block, Aluminum Heads and Hydraulic roller design camshaft
This production engine powers the AWD Cadillac Escalade
This production engine includes: exhaust manifolds, intake manifold, injectors, fuel rails, balancer, water pump and flywheel
The iron block truck LQ9 engine weighs approximately 65 pounds more than a typical LS1 and LS6.


And here is the 4L65EClick Here For The Link

Quote:
24221888 4L65-E Automatic Transmission
GM Hydramatic has baked even more technology enhancements into the automatic transmission line up with the new 4L65E. This transmission, the latest creation from GM Hydramatic Motorsports, is a four speed, offering all the latest heavy duty components to stand up to the power of the LS6-405 HP Corvette engines. Upgrades like induction hardened turbine input shafts, larger intermediate servo, an additional three-four clutch plate. All go toward accommodating higher engine power output. The 4L65E offers optimized performance, fuel economy and increase durability. This sate-of-the-art transmission features the latest heavy duty components and high tech-electronic controls. The advanced electronics controlling the LS6 engine also manages the 4L65E shift points, providing unparalleled performance and durability, P/N 24221888 also includes the torque converter. (No core charge required on this transmission)
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Old 11-08-2004, 06:43 PM
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