Engine illustrations of the LS3 and L99 - ModernCamaro.com - 5th Generation Camaro Enthusiasts
V8 Engine Discussion 6.2L LS3/L99 V8 | Exhaust | Ignition | Induction | Intakes

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post #1 of 23 Old 09-26-2008, 11:42 PM Thread Starter
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Engine illustrations of the LS3 and L99

The LS3 cam gear looks like something you would expect to see, but the L99 looks much different. It's obviously more than just a timing chain cam sprocket. Wonder if that is something to do with the AFM system ??????
Also look at the top of the L99's Pistons Compared to the LS3.


L99 = Automatic






LS3 = Manual

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post #2 of 23 Old 09-26-2008, 11:46 PM
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Piston heads look different, too.



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post #3 of 23 Old 09-27-2008, 12:00 AM
 
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Side by side, easier to compare imo


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post #4 of 23 Old 09-27-2008, 12:13 AM Thread Starter
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Thanks Slug im still uploading pictures of the launch party lol
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post #5 of 23 Old 09-29-2008, 11:29 AM
 
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I'm guessing the cam gear is for VVT.

The valve reliefs in the pistons are probably also VVT related. only 1 is 'funtional', which allows the piston to be installed in either orientation.
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post #6 of 23 Old 09-29-2008, 11:51 AM
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im gonna "pretend" i see a difference
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post #7 of 23 Old 09-29-2008, 01:01 PM
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You can also see the solenoids for the AFM on the L99.

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post #8 of 23 Old 09-29-2008, 02:32 PM
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im gonna "pretend" i see a difference
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One's on the left, and one's on the right....

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post #9 of 23 Old 09-29-2008, 07:01 PM
 
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very little difference how is there a 30hp difference?
did they tune it differently or what
or are they just saying that?
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post #10 of 23 Old 09-29-2008, 07:44 PM
 
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The L99 and LS3 are two different motors. The l99 has the active fuel mangerment on it and the ls3 does not. The l99 is a more fuel efficent engine then the ls3 and its getting mated with the auto since the auto is not as efficent as a manual.
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