does anyone know what is the difference between LS3 and L99 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

hamadooo · 11-11-2009, 02:45 PM

does anyone know what is the difference between LS3 and L99

lightning · 11-11-2009, 02:47 PM

Quote:

Originally Posted by hamadooo

does anyone know what is the difference between LS3 and L99

LS3 = 426 HP
L99 = 400 HP

LS3 = Manual Trans
L99 = Auto Trans

SS Mike · 11-11-2009, 02:50 PM

LS3 = No Active Fuel Management

L99 = Active Fuel Management

v6sonoma · 11-11-2009, 02:50 PM

LS3 is only on manual and has a racier cam and no active fuel management the L99 is only on the auto has a milder cam and includes active fuel management. LS3 has 26hp more than the L99 but doesn't get as good mileage.

boxmonkeyracing · 11-11-2009, 03:04 PM

l99 is an ls3 re designed with a new valvtrain and cam for the autmatic to have AFM. which lowers hp but increases fuel economy.

the LS3 is just one bad ass motor with out AFM and is only available with the manual.

PQ · 11-11-2009, 03:04 PM

LS3 and L99 =

SSOOCH · 11-11-2009, 03:38 PM

Quote:

Originally Posted by PQ

LS3 and L99 =

You're such Killjoy sometimes PQ....

PQ · 11-11-2009, 03:42 PM

Quote:

Originally Posted by SSOOCH

You're such Killjoy sometimes PQ....

I shouldn't have.

PQ · 11-11-2009, 03:43 PM

But the L99 is the far superior motor. EVERYONE here agrees to that.

ffrcobra_65 · 11-11-2009, 03:46 PM

Quote:

Originally Posted by PQ

But the L99 is the far superior motor. EVERYONE here agrees to that.

that is why I will buy one to put in my '73 Beetle where it belongs. Okay, I go hide now.

jrboyd_1980 · 11-11-2009, 04:22 PM

L99 Technical Specs
6.2 L V-8
Engine type: LS Series Gen IV Small-Block V-8
Displacement (cu in): 376 cu in (6.2L)
Bore x Stroke (in): 4.06x3.62
Block: Cast-Aluminum with 6 bolt, cross-bolted main caps
Crankshaft: Nodular Iron
Connecting Rods: Powdered Metal
Pistons: Hypereutectic aluminum
Camshaft Type: Hydraulic Roller
Valve Lift (in): .500" intake/ .492" exhaust
Camshaft duration (@.050 in): 195 degree intake/201 degree exhaust
Cylinder Heads: Aluminum L92 style port as cast w/ 68cc chambers
Valve Size (in): 2.16 intake / 1.59 exhaust
Compression Ratio: 10.7:1
Rocker Arms: Investment-cast, roller trunnion
Rock Arm Ratio: 1.7:1
Recommended Fuel: 92 Octane
Max Recommended RPM: 6600
Reluctor Wheel: 58X
Balanced: Internal

LS3
6.2L V8
Engine type: LS Series Gen IV Small-Block V-8
Displacement (cu in): 376 cu in (6.2L)
Bore x Stroke (in): 4.06x3.62
Block: Cast-Aluminum with 6 bolt, cross-bolted main caps
Crankshaft: Nodular Iron
Connecting Rods: Powdered Metal
Pistons: Hypereutectic aluminum
Camshaft Type: Hydraulic Roller
Valve Lift (in): .551" intake/ .522" exhaust
Camshaft duration (@.050 in): 204 degree intake/211 degree exhaust
Cylinder Heads: Aluminum L92 style port as cast w/ 68cc chambers
Valve Size (in): 2.165 intake / 1.59 exhaust
Compression Ratio: 10.7:1
Rocker Arms: Investment-cast, roller trunnion
Rock Arm Ratio: 1.7:1
Recommended Fuel: 92 Octane
Max Recommended RPM: 6600
Reluctor Wheel: 58X
Balanced: Internal

Biggest difference is the Valve Lifts, Camshaft Duration, and .005 in on the intake valve size.

Alfieboy · 11-11-2009, 05:57 PM

Quote:

Originally Posted by PQ

But the L99 is the far superior motor. EVERYONE here agrees to that.

Cough ,Cough..

LOL

nashstat · 11-11-2009, 08:08 PM

Quote:

Originally Posted by PQ

But the L99 is the far superior motor. EVERYONE here agrees to that.

Maybe, but the LS3 is far more fun to drive than the L99... No one can argue with that!

DrumDawg · 11-11-2009, 08:12 PM

Quote:

Originally Posted by nashstat

Maybe, but the LS3 is far more fun to drive than the L99... No one can argue with that!

Unless you have your arm around your girl!

11-11-2009, 02:45 PM	#1
hamadooo Drives: Jeep SRT8 6.1L HEMI Join Date: Nov 2009 Location: Doha,Qatar Posts: 30	does anyone know what is the difference between LS3 and L99 does anyone know what is the difference between LS3 and L99

11-11-2009, 02:50 PM	#3
SS Mike Drives: 2010 Camaro SS/RS CGM M6 Join Date: Jun 2009 Location: Orange County, California Posts: 804	LS3 = No Active Fuel Management L99 = Active Fuel Management __________________ Vortech V-3 Kit, ARH LT's, Custom Exhaust, Aeromotive A1000 Fuel System, Custom Tune - 582 rwhp 533 rwtq 22" Modulare H2 Wheels, CF Hood, Trunk, Spoiler & Roof by Carbon by Design, Custom Steering Wheel from P-Factor Brembo GT BBK, Alpine INA-900, Alpine Type-R Speakers, Hurst Shifter, APR Splitter, Custom Quad Tip Diffuser CKS C1 Coilovers, Falken 452 Tires, 265/35/22 & 285/35/22, Custom Grille, AAC Halos, and much more to come!!

11-11-2009, 02:50 PM	#4
v6sonoma Drives: 2010 SS RS Join Date: Jun 2009 Location: Providence, RI Posts: 8,108 View My Garage	LS3 is only on manual and has a racier cam and no active fuel management the L99 is only on the auto has a milder cam and includes active fuel management. LS3 has 26hp more than the L99 but doesn't get as good mileage. __________________ Mods: BBK Intake, BBK LT's and High Flow Cats, Corsa Cat-back exhaust, Hurst short throw shifter, SLP skip-shift eliminator. 7/1/09 Placed order for IOM/IO int/ SS/RS 6M 9/26/09 Took delivery!

11-11-2009, 03:04 PM	#6
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	LS3 and L99 = __________________

11-11-2009, 03:43 PM	#9
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	But the L99 is the far superior motor. EVERYONE here agrees to that. __________________

11-11-2009, 04:22 PM	#11
jrboyd_1980 A ***'s Headache Drives: Everything Join Date: Aug 2009 Location: Texas Posts: 2,174	L99 Technical Specs 6.2 L V-8 Engine type: LS Series Gen IV Small-Block V-8 Displacement (cu in): 376 cu in (6.2L) Bore x Stroke (in): 4.06x3.62 Block: Cast-Aluminum with 6 bolt, cross-bolted main caps Crankshaft: Nodular Iron Connecting Rods: Powdered Metal Pistons: Hypereutectic aluminum Camshaft Type: Hydraulic Roller Valve Lift (in): .500" intake/ .492" exhaust Camshaft duration (@.050 in): 195 degree intake/201 degree exhaust Cylinder Heads: Aluminum L92 style port as cast w/ 68cc chambers Valve Size (in): 2.16 intake / 1.59 exhaust Compression Ratio: 10.7:1 Rocker Arms: Investment-cast, roller trunnion Rock Arm Ratio: 1.7:1 Recommended Fuel: 92 Octane Max Recommended RPM: 6600 Reluctor Wheel: 58X Balanced: Internal LS3 6.2L V8 Engine type: LS Series Gen IV Small-Block V-8 Displacement (cu in): 376 cu in (6.2L) Bore x Stroke (in): 4.06x3.62 Block: Cast-Aluminum with 6 bolt, cross-bolted main caps Crankshaft: Nodular Iron Connecting Rods: Powdered Metal Pistons: Hypereutectic aluminum Camshaft Type: Hydraulic Roller Valve Lift (in): .551" intake/ .522" exhaust Camshaft duration (@.050 in): 204 degree intake/211 degree exhaust Cylinder Heads: Aluminum L92 style port as cast w/ 68cc chambers Valve Size (in): 2.165 intake / 1.59 exhaust Compression Ratio: 10.7:1 Rocker Arms: Investment-cast, roller trunnion Rock Arm Ratio: 1.7:1 Recommended Fuel: 92 Octane Max Recommended RPM: 6600 Reluctor Wheel: 58X Balanced: Internal Biggest difference is the Valve Lifts, Camshaft Duration, and .005 in on the intake valve size.

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