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Old 01-13-2014, 10:49 PM   #55
Number 3
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Drives: '19 XT4 2.0T & '22 VW Atlas 2.0T
Join Date: Dec 2008
Location: Illinois
Posts: 12,310
I'd have to check the specs but I think the LT4 has a higher compression ratio than the LS9.

Maybe a lower boost higher CR helps with heat soak?? I can't imagine that THE GM track car would not address this FULLY. Maybe I'm too hopeful. I think there is yet more to be told here.
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