Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Roto-Fab
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > General Camaro Forums > 5th Gen Camaro SS LS LT General Discussions


Reply
 
Thread Tools
Old 08-21-2014, 12:11 PM   #1
Orange 2010 Camaro
 
Orange 2010 Camaro's Avatar
 
Drives: 2010 2SS/RS Camaro
Join Date: Aug 2014
Location: United States
Posts: 268
LS3 TO L99 Horsepower Question?

I recently purchased a 2010 2SS/RS L99 Camaro with the 6L80 6 speed automatic transmission with only 10,855 mi. on the clock.

The LS3 manual transmission Camaro has 426 brake horsepower @ 5900 rpm, with 420 lb. ft. of torque @ 4600 rpm.

The L99 Camaro only has 400 brake horsepower @ 5900 rpm with 410 lb. of torque @ 4300 rpm.

Could someone please tell me why the HORSEPOWER is not the same for both the LS3 & the L99 Camaro. The information in the Camaro brochure, lists that they both have the EXACT SAME 6.2 liter (376) cu. in. engine. I am confused!

Also the REDLINE Max RPM for the LS3 is listed @ 6600, & the REDLINE Max RPM for the L99 is listed @ 6200. The top speed for BOTH cars also is listed 155 mph. Again, I am confused!

Thank You So Much in advance for the information.

All The Best,

Orange 2010 Camaro
Orange 2010 Camaro is offline   Reply With Quote
Old 08-21-2014, 12:13 PM   #2
TommyTheCat
SHKE BKE
 
TommyTheCat's Avatar
 
Drives: 2013 Camaro
Join Date: May 2014
Location: SoCal
Posts: 3,108
Automatics have less power?
TommyTheCat is offline   Reply With Quote
Old 08-21-2014, 12:19 PM   #3
qcman

 
qcman's Avatar
 
Drives: 2013 Camaro 2SS RDP Tuned L99
Join Date: Apr 2013
Location: Ottawa, Canada eh?
Posts: 1,890
Yes they are both 6.2 L but the L99 uses AFM where it cuts off cylinders to supposedly save fuel while the LS3 does not. So they are quite a bit different right there. I think the L99 is based off of a sportute engine too not sure on that though.

Cam
qcman is offline   Reply With Quote
Old 08-21-2014, 12:22 PM   #4
krusher
 
krusher's Avatar
 
Drives: 2010 Camaro SS/RS CGM
Join Date: Dec 2011
Location: Oskaloosa, IA
Posts: 627
I believe they have a more stout cam that that produces more power, but gets worse gas mileage. The L99 has weaker components with the lifters which are different due to being for AFM or Active fuel management. Chevy did this to make the camaro more fuel efficient to avoid the gas guzzler tax. Why the did this for one and not the other I am not sure, but there are a ton of articles on it and there are more informed individuals than me on this forum that I am sure will chim in, but that is the meat and potatoes.

One good thing about the L99 is the variable valve timing make a really nice torque by retarding and advancing the cam and if you put a VVT cam you have a beast on your hands.
krusher is offline   Reply With Quote
Old 08-21-2014, 12:23 PM   #5
GretchenGotGrowl


 
GretchenGotGrowl's Avatar
 
Drives: 11 F150 EB/13 Sonic RS/15 Z06
Join Date: Sep 2010
Location: Little Rock, AR
Posts: 7,129
Quote:
Originally Posted by Orange 2010 Camaro View Post
I recently purchased a 2010 2SS/RS L99 Camaro with the 6L80 6 speed automatic transmission with only 10,855 mi. on the clock.

The LS3 manual transmission Camaro has 426 brake horsepower @ 5900 rpm, with 420 lb. ft. of torque @ 4600 rpm.

The L99 Camaro only has 400 brake horsepower @ 5900 rpm with 410 lb. of torque @ 4300 rpm.

Could someone please tell me why the HORSEPOWER is not the same for both the LS3 & the L99 Camaro. The information in the Camaro brochure, lists that they both have the EXACT SAME 6.2 liter (376) cu. in. engine. I am confused!

Also the REDLINE Max RPM for the LS3 is listed @ 6600, & the REDLINE Max RPM for the L99 is listed @ 6200. The top speed for BOTH cars also is listed 155 mph. Again, I am confused!

Thank You So Much in advance for the information.

All The Best,

Orange 2010 Camaro
The L99 has a different valve train (VVT) and lower compression ratio than the LS3. That is probably where the difference in power is coming from.
__________________
New Ride -- 2015 Z06 2LZ (stock) -- Journal
Old Ride -- 2012 Camaro 2LT/RS (647 RWHP & 726 RWTQ) -- Build Thread
GretchenGotGrowl is offline   Reply With Quote
Old 08-21-2014, 12:26 PM   #6
GretchenGotGrowl


 
GretchenGotGrowl's Avatar
 
Drives: 11 F150 EB/13 Sonic RS/15 Z06
Join Date: Sep 2010
Location: Little Rock, AR
Posts: 7,129
Quote:
Originally Posted by Comrando View Post
We tied!
__________________
New Ride -- 2015 Z06 2LZ (stock) -- Journal
Old Ride -- 2012 Camaro 2LT/RS (647 RWHP & 726 RWTQ) -- Build Thread
GretchenGotGrowl is offline   Reply With Quote
Old 08-21-2014, 12:28 PM   #7
ZED SLED


 
ZED SLED's Avatar
 
Drives: 2017 Mosaic Bk ZL1 M6
Join Date: Jul 2009
Location: South of Raleigh, NC
Posts: 9,458
What they said.
Also, top is speed is not 155mph. It is electronically limited to 155. That can be tuned out.
__________________

ZED SLED is offline   Reply With Quote
Old 08-21-2014, 12:36 PM   #8
ravensjeff
100% Chevy & Harley Man
 
ravensjeff's Avatar
 
Drives: 2010 2SS: Blown LSX 376-B15
Join Date: Feb 2009
Location: Eldersburg,MD
Posts: 2,211
They also have different gear ratios in the rear; L99 has 3.26 & LS3 3.45's.

I've long ago converted mine from an L99 to LS3. I think it would be odd to have VVT with 650HP in a Camaro with all the mods I've had done.
__________________
LSX 376-B15, TVS2300 SC, Harland Sharp Rockers w/ Trunion Bearings, ATI Balancer/keyed, AR LT Headers/Borla Catback Exhaust, DSS 1400 HP Axles, DSS aluminum driveshaft, 3.70, Hotchkis Springs/Sway bars, Forgeline SO3P Aluminum Wheels (20x9.5 F/20x11 R)w/ Hidden Titanium Hardware, Nitto NT05 Tires (27540ZR20 F/31535ZR20 R), Billet LPE brake/gas pedals, Escort 9500ci Radar Detector Laser Jammer, Roto Fab CAI with Ice Silver box, Carbon fiber tube/MAF Housing Assy, LPE Aluminum coil covers, SS9 Sleeper Fiber Glass Hood (ACS), Carbotech 1521 ceramic brake pads, Elite catch can.
ravensjeff is offline   Reply With Quote
Old 08-21-2014, 12:38 PM   #9
elektrik
 
elektrik's Avatar
 
Drives: 2012 ZL1
Join Date: Feb 2014
Location: Tracy, CA
Posts: 533
My head hurts from this discussion-I am SO *not* mechanically inclined. lol!!
__________________
Current car: 2012 ZL1 - "Venom" - *RIP*
Previous car: 2011 2SS - "NCC-1701-A"
Previous car: 2010 2SS - "NCC-1701" (Stolen & Stripped)*RIP*
elektrik is offline   Reply With Quote
Old 08-21-2014, 12:39 PM   #10
Enduring
 
Enduring's Avatar
 
Drives: 2013 2SS/RS M6
Join Date: May 2014
Location: Canada
Posts: 203
Quote:
Originally Posted by qcman View Post
Yes they are both 6.2 L but the L99 uses AFM where it cuts off cylinders to supposedly save fuel while the LS3 does not. So they are quite a bit different right there. I think the L99 is based off of a sportute engine too not sure on that though.

Cam
The L99 is just an LS3 with VVT and AFM (and the corresponding changes that go with VVT and AFM).

Quote:
Originally Posted by krusher View Post
I believe they have a more stout cam that that produces more power, but gets worse gas mileage. The L99 has weaker components with the lifters which are different due to being for AFM or Active fuel management. Chevy did this to make the camaro more fuel efficient to avoid the gas guzzler tax. Why the did this for one and not the other I am not sure, but there are a ton of articles on it and there are more informed individuals than me on this forum that I am sure will chim in, but that is the meat and potatoes.

One good thing about the L99 is the variable valve timing make a really nice torque by retarding and advancing the cam and if you put a VVT cam you have a beast on your hands.
They added the 1-4 skip shift to manual Camaros to bring the "normal driving conditions" fuel economy up and avoid the gas guzzler tax. The Chevy SS has the same LS3 engine in it but doesn't have the skip shift and has $1300 in gas guzzler tax on it.
Enduring is offline   Reply With Quote
Old 08-21-2014, 02:02 PM   #11
hunter1660

 
hunter1660's Avatar
 
Drives: 2011ss/rs camaro
Join Date: Sep 2011
Location: florida
Posts: 1,261
They reduced the horsepower on the L99 so the LS3 could keep up
__________________
. OBX LTH,Rotofab,Magnuson Heartbeat.AEM wideband, HP Tuners
hunter1660 is offline   Reply With Quote
Old 08-21-2014, 02:24 PM   #12
Rock-It Man
376 cubic inches of fun
 
Rock-It Man's Avatar
 
Drives: 2023 Camaro ZL1 A10
Join Date: Jul 2010
Location: MA
Posts: 4,026
The L99 has a lower peak horsepower but the VVT yields a flatter torque curve, so it has the same or better horsepower in real world driving, that is, in the 1500 to 4000 rpm range.
Rock-It Man is offline   Reply With Quote
Old 08-21-2014, 02:49 PM   #13
PalmerGA


 
PalmerGA's Avatar
 
Drives: 2013 SIM 1SS/RS L99
Join Date: May 2012
Location: Southwest GA
Posts: 8,755
Quote:
Originally Posted by hunter1660 View Post
They reduced the horsepower on the L99 so the LS3 could keep up
__________________
2013 1SS/RS Coupe L99, Stainless Power Works LT Headers, SCT X4 Custom Tune from RDP, CAI Inc. Air Intake w/ Apex Scoop, VMAX CNC Ported Throttle Body, Solo Axle-Back Exhaust w/ J-pipes, Apex Catch Can, Husky Splash Guards, Heritage Grille, 3D Carbon Rear Spoiler, Oracle Chrome Turn Signal Bulbs, GM Reverse Light Trim Billets, Gorilla Black Locking Lugs, Emblem Pros Retro SS Badges/Custom Retro SS Kickplates/Under-hood Bowtie, 35% window Tint, Nitto Motivo Tires (6-8-18)
PalmerGA is offline   Reply With Quote
Old 08-21-2014, 02:54 PM   #14
EmeryZ28

 
EmeryZ28's Avatar
 
Drives: 2011 Camaro 2SS/RS LS3
Join Date: Aug 2013
Location: Tampa Bay
Posts: 812
lol at the L99ers
__________________
2015 Silverado Z71 6.2/2011 Camaro 2SSRS LS3/2014 Cadillac ATS 2.0T
EmeryZ28 is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 06:38 AM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.