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Old 09-23-2008, 10:03 PM   #1
5thGenSS
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LS3 and L99 Cutaways

Been lurking for a few months, but I thought I'd break the ice by introducing you to the LS3 (Top) and L99 (Bottom) in the nude...sort of.

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Old 09-23-2008, 10:40 PM   #2
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Hmm... WELCOME - first, and second, I wonder what's with the valve reliefs in the L99...

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Old 09-24-2008, 12:45 AM   #3
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Hmm... WELCOME - first, and second, I wonder what's with the valve reliefs in the L99...

Thanks
Clearance
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Old 09-24-2008, 01:27 AM   #4
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to the LS3
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Old 09-24-2008, 06:54 AM   #5
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Nice pictures!!! SS all the way.
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Old 09-24-2008, 07:20 AM   #6
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springs over the lifters too? hummmmm...

not the valve springs, but down near the cam
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Old 09-24-2008, 09:40 AM   #7
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Look at those little power factories!
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Old 09-24-2008, 09:50 AM   #8
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We need a lot more information on the L99. I've been trying to figure out a lot of the new stuff. It looks so much like other LS-series engines with a few unique features.
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Old 09-24-2008, 01:44 PM   #9
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Quote:
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springs over the lifters too? hummmmm...

not the valve springs, but down near the cam
Also they have different pistons
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Old 09-24-2008, 01:50 PM   #10
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springs over the lifters too? hummmmm...

not the valve springs, but down near the cam
That appears to be the spring in the hydraulic roller lifter.
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Old 09-24-2008, 02:16 PM   #11
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Clearance
I'm with you there, but I'm wondering why? I believe the LS3 has a lumpier cam so why is it the L99 has them?
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Old 09-24-2008, 02:23 PM   #12
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I'm with you there, but I'm wondering why? I believe the LS3 has a lumpier cam so why is it the L99 has them?
I bet it's so that if the afm gets stuck and holds a valve open it won't make contact with the piston. I know you don't want to miss oil changes with the afm or use the wrong oil.
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Old 09-25-2008, 01:21 PM   #13
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sweeet. me want to hug them
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Old 09-25-2008, 02:08 PM   #14
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look at the cam gear on the L99. WAY different, i wonder what it does? maybe some sort of clutch the advances or retards the cam. I think ill call it Variable Valve timing and patent it
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