L99 LS3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

freedom 1 · 09-22-2010, 07:36 AM

What is the difference In the L99 and LS3 engines?

wirebender · 09-22-2010, 08:30 AM

L-99-400 hp, 6.2L V-8 with VVT is what is in the camaro with auto trans, also has AFM
LS3-426hp, 6.2L V-8 is what comes in the camaro with manual trans, NO AFM

ron10 · 09-22-2010, 08:36 AM

+1

TOMS1SS · 09-22-2010, 08:38 AM

Quote:

Originally Posted by wirebender

L-99-400 hp, 6.2L V-8 with VVT is what is in the camaro with auto trans, also has AFM
LS3-426hp, 6.2L V-8 is what comes in the camaro with manual trans, NO AFM

In addition the L99 has cylinder deactivation and slightly less aggressive gearing which leads to the lower power rating. This leads to a slightly improved fuel economy but not by much. The drive tests of the automatic show there is virtually no difference speed wise (0 to 60) and (quarter mile) between the two engines.

Rogue Leader · 09-22-2010, 09:32 AM

Quote:

Originally Posted by wirebender

L-99-400 hp, 6.2L V-8 with VVT is what is in the camaro with auto trans, also has AFM
LS3-426hp, 6.2L V-8 is what comes in the camaro with manual trans, NO AFM

It does NOT have VVT

Quote:

Originally Posted by Fearer2010SS

In addition the L99 has cylinder deactivation and slightly less aggressive gearing which leads to the lower power rating. This leads to a slightly improved fuel economy but not by much. The drive tests of the automatic show there is virtually no difference speed wise (0 to 60) and (quarter mile) between the two engines.

AFM = cylinder deactivation

WadeWilson · 09-22-2010, 09:45 AM

Quote:

Originally Posted by Rogue Leader

It does NOT have VVT

Ummm yes it does.

http://gmhightechperformance.automot...ve-timing.html

Rogue Leader · 09-22-2010, 11:59 AM

Quote:

Originally Posted by Shardik2SS

Ummm yes it does.

http://gmhightechperformance.automot...ve-timing.html

I stand corrected

PQ · 09-22-2010, 12:09 PM

LS3 sux
L99 rocks

IBM/2SS/RS/LS3 · 09-22-2010, 02:37 PM

Quote:

Originally Posted by PQ

LS3 sux
L99 rocks

Whatever......

GEEo · 09-22-2010, 02:38 PM

Quote:

Originally Posted by PQ

LS3 sux
L99 rocks

LS3 rule's L99 drool's! lol

freedom 1 · 09-22-2010, 10:33 PM

Thanks for the info!

Huggerorange73 · 09-22-2010, 10:42 PM

L99 has a lower compression ratio and a less agrresive cam profile. Upgrading to a larger cam tends to be more expensive and labor intensive in this engine.

LS3 has higher compression as well as a more agressive cam....upgrading the cam in the LS3 is just as easy as the LS1,2, etc.

All depends what ya like and what direction you're going in!

09-22-2010, 07:36 AM	#1
freedom 1 Drives: 2011 1LT RS, 2008 silverado LT Join Date: Sep 2010 Location: shelbyville IL Posts: 4	L99 LS3 What is the difference In the L99 and LS3 engines?

09-22-2010, 12:09 PM	#8
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	LS3 sux L99 rocks __________________

09-22-2010, 10:33 PM	#11
freedom 1 Drives: 2011 1LT RS, 2008 silverado LT Join Date: Sep 2010 Location: shelbyville IL Posts: 4	thanks Thanks for the info!

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09-22-2010, 08:30 AM	#2
wirebender Drives: 2017 ZL1, A10, White, sunroof, nav Join Date: Apr 2009 Location: Garner, NC Posts: 720 View My Garage	L-99-400 hp, 6.2L V-8 with VVT is what is in the camaro with auto trans, also has AFM LS3-426hp, 6.2L V-8 is what comes in the camaro with manual trans, NO AFM

09-22-2010, 08:36 AM	#3
ron10 Drives: 2010 2SS IOM L99 Join Date: Jan 2010 Location: LOUISVILLE,KY.. Posts: 7,545	+1

09-22-2010, 10:42 PM	#12
Huggerorange73 Banned Drives: The REAL C5 Join Date: Nov 2007 Location: Norridge, IL Posts: 1,830	L99 has a lower compression ratio and a less agrresive cam profile. Upgrading to a larger cam tends to be more expensive and labor intensive in this engine. LS3 has higher compression as well as a more agressive cam....upgrading the cam in the LS3 is just as easy as the LS1,2, etc. All depends what ya like and what direction you're going in!