08-21-2014, 12:11 PM | #1 |
Drives: 2010 2SS/RS Camaro Join Date: Aug 2014
Location: United States
Posts: 268
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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 |
08-21-2014, 12:13 PM | #2 |
SHKE BKE
Drives: 2013 Camaro Join Date: May 2014
Location: SoCal
Posts: 3,108
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Automatics have less power?
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08-21-2014, 12:19 PM | #3 |
Drives: 2013 Camaro 2SS RDP Tuned L99 Join Date: Apr 2013
Location: Ottawa, Canada eh?
Posts: 1,890
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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 |
08-21-2014, 12:22 PM | #4 |
Drives: 2010 Camaro SS/RS CGM Join Date: Dec 2011
Location: Oskaloosa, IA
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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. |
08-21-2014, 12:23 PM | #5 | |
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Quote:
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08-21-2014, 12:26 PM | #6 |
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08-21-2014, 12:28 PM | #7 |
Drives: 2017 Mosaic Bk ZL1 M6 Join Date: Jul 2009
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What they said.
Also, top is speed is not 155mph. It is electronically limited to 155. That can be tuned out.
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08-21-2014, 12:36 PM | #8 |
100% Chevy & Harley Man
Drives: 2010 2SS: Blown LSX 376-B15 Join Date: Feb 2009
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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.
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08-21-2014, 12:38 PM | #9 |
Drives: 2012 ZL1 Join Date: Feb 2014
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My head hurts from this discussion-I am SO *not* mechanically inclined. lol!!
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08-21-2014, 12:39 PM | #10 | ||
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08-21-2014, 02:02 PM | #11 |
Drives: 2011ss/rs camaro Join Date: Sep 2011
Location: florida
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They reduced the horsepower on the L99 so the LS3 could keep up
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08-21-2014, 02:24 PM | #12 |
376 cubic inches of fun
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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.
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08-21-2014, 02:49 PM | #13 |
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08-21-2014, 02:54 PM | #14 |
Drives: 2011 Camaro 2SS/RS LS3 Join Date: Aug 2013
Location: Tampa Bay
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lol at the L99ers
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