Quote:
Originally Posted by Number 3
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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LT4 CR = 10.0 to 1 (from press release)
LS9 CR = 9.1 to 1