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bobscogin · 09-23-2008, 05:20 PM

I'm looking at the cut away illustrations of the LS3 and L99 on http://www.gmhightechperformance.com
Compare the timing gears/chain on the two engines. The LS3 cam gear looks like you'd expect, but the L99 looks much different. It's obviously more than just a timing chain cam sprocket. Is it part of the AFM system (don't think so), or some sort of VVT mechanism, or what?

Bob

09-23-2008, 05:20 PM	#1
bobscogin Drives: 2016 Challenger R/T, 1965 Impala SS Join Date: Aug 2008 Location: Slidell, LA Posts: 116	VVT on L99, or what? I'm looking at the cut away illustrations of the LS3 and L99 on http://www.gmhightechperformance.com Compare the timing gears/chain on the two engines. The LS3 cam gear looks like you'd expect, but the L99 looks much different. It's obviously more than just a timing chain cam sprocket. Is it part of the AFM system (don't think so), or some sort of VVT mechanism, or what? Bob