wht different between the LS3 and L99 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

camaro 4 ever · 08-12-2009, 02:59 AM

I wanna know wht different between LS3 and L99

overlod
performance
and part of the engine if I wanna modified it

thank you

a6pk2go · 08-12-2009, 03:13 AM

I can tell you a little........damn little..........the L99 comes with 400hp automatic and the LS3 has 426 hp and a manual or "stick".

The L99 has a fuel management system that helps or is supposed to with fuel management but what do I know............I'm getting a V6

Epitaph · 08-12-2009, 03:16 AM

LS3 - 426HP - Manual Transmission
L99 - 400HP - Automatic Transmission with active fuel management (AFM turns 4 cylinders "off")

You can modify the hell out of these engines, from exhaust to a supercharger. Nobody knows the peak HP output of this engine (before modifying internals), but the block can handle tons of psi.

camaro 4 ever · 08-12-2009, 03:19 AM

Thank you very much for info

did any one modify the engine of ls3 or l99 (internal )

a6pk2go · 08-12-2009, 03:23 AM

I know ADM PERFORMANCE (aka Andy) already took his motor out and put a 427 with a few mods and it is kicking over 600 horses in his bad asze Camaro.

You can check out his posts and see what he has done. It is pretty sweet. I saw and HEAR it last Saturday.

Ck out his thread http://www.camaro5.com/forums/showthread.php?t=36712

BrianGriffin78 · 08-12-2009, 08:38 AM

Not another thread like this.

chicagojoe16 · 08-12-2009, 08:45 AM

Quote:

Originally Posted by BrianGriffin78

Not another thread like this.

Dude these threads are the best! Great unintentional comedy

2010 2-Tone · 08-12-2009, 08:46 AM

What is the milage differance on the sticker between the L99 and the LS3?

SSOOCH · 08-12-2009, 08:47 AM

The L99 comes with 3.27 gears and the LS3 has 3.45.

L99 = 10:4 compression
LS3 = 10:7 compression

*DGthe3* · 08-13-2009, 10:44 AM

Quote:

Originally Posted by camaro 4 ever

I wanna know wht different between LS3 and L99

overlod
performance
and part of the engine if I wanna modified it

thank you

They use the exact same engine block and the vast majority of other pieces, so what you can do to one you can do to the other. The main difference between the two engines is that the L99 has variable valve timing and active fuel management.

Montrose · 08-13-2009, 10:49 AM

the heads are different because of the afm system, and a small cam because of the afm, and as others have said it also has vvt, but if you changed the cam and heads it would be an LS3, you would also need to the ecm reprogramed to turn of the afm.

Montrose

08-12-2009, 02:59 AM	#1
camaro 4 ever Drives: CAMARO Join Date: Nov 2007 Location: saudi arabi Posts: 34	wht different between the LS3 and L99 I wanna know wht different between LS3 and L99 overlod performance and part of the engine if I wanna modified it thank you __________________ CaMaRo FrOm HeLL

08-12-2009, 03:19 AM	#4
camaro 4 ever Drives: CAMARO Join Date: Nov 2007 Location: saudi arabi Posts: 34	Thank you very much for info did any one modify the engine of ls3 or l99 (internal ) __________________ CaMaRo FrOm HeLL

08-12-2009, 03:23 AM	#5
a6pk2go Drives: ... Join Date: Oct 2008 Location: ... Posts: 1,721	I know ADM PERFORMANCE (aka Andy) already took his motor out and put a 427 with a few mods and it is kicking over 600 horses in his bad asze Camaro. You can check out his posts and see what he has done. It is pretty sweet. I saw and HEAR it last Saturday. Ck out his thread http://www.camaro5.com/forums/showthread.php?t=36712 Last edited by a6pk2go; 08-12-2009 at 03:37 AM.

08-12-2009, 08:38 AM	#6
BrianGriffin78 Drives: 2009 GMC Yukon Join Date: May 2009 Location: New York Posts: 920	Not another thread like this. __________________

08-12-2009, 08:47 AM	#9
SSOOCH Camaro SL,UTs Drives: 2010 Camaro SS/RS #16429 Join Date: Sep 2006 Location: South Jordan, UT Posts: 7,358 View My Garage	The L99 comes with 3.27 gears and the LS3 has 3.45. L99 = 10:4 compression LS3 = 10:7 compression __________________

08-12-2009, 03:13 AM	#2
a6pk2go Drives: ... Join Date: Oct 2008 Location: ... Posts: 1,721	I can tell you a little........damn little..........the L99 comes with 400hp automatic and the LS3 has 426 hp and a manual or "stick". The L99 has a fuel management system that helps or is supposed to with fuel management but what do I know............I'm getting a V6

08-12-2009, 03:16 AM	#3
Epitaph Custom User Title Drives: Fast Join Date: Jan 2009 Location: San Diego, CA Posts: 550	LS3 - 426HP - Manual Transmission L99 - 400HP - Automatic Transmission with active fuel management (AFM turns 4 cylinders "off") You can modify the hell out of these engines, from exhaust to a supercharger. Nobody knows the peak HP output of this engine (before modifying internals), but the block can handle tons of psi.

08-12-2009, 08:46 AM	#8
2010 2-Tone Drives: 2010 RY 2SS with Custom Stripes Join Date: Mar 2009 Location: Jennings, La. Posts: 2,220 View My Garage	What is the milage differance on the sticker between the L99 and the LS3?

08-13-2009, 10:49 AM	#11
Montrose USN CPO Drives: 08 Titan,2103 Challenger 392 SRT-8 Join Date: Nov 2008 Location: Cherry Point, NC Posts: 89 View My Garage	the heads are different because of the afm system, and a small cam because of the afm, and as others have said it also has vvt, but if you changed the cam and heads it would be an LS3, you would also need to the ecm reprogramed to turn of the afm. Montrose __________________ 2013 Challenger SRT8, Auto, PCP. mods, Diablo Sport Trinity T1000, AAD catch can, Mopar strut brace, MBRP S7102304 cat-back, MM 85mm TB. 08 Titan PRO4X Gray.

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